Description:FIELD OF THE INVENTION
[001] The present invention relates to wearable respiratory personal protection systems for use in surgical and medical environments, particularly to a surgical helmet system that can transform into a Powered air Purifying respirator (PAPR) with the use of modular attachments. More specifically, the invention provides a head-mounted protective system that integrates filtration, illumination, imaging and airflow control through removable modular components, enabling enhanced respiratory protection, lighting, and comfort for healthcare professionals.

BACKGROUND OF THE INVENTION
[002] In surgical environments, healthcare professionals are exposed to multiple airborne hazards, including contaminants such as bone debris, infectious liquid splashes, which are generated during surgical and non-surgical procedures. One of the significant sources of these hazards is cautery smoke, which is produced when surgical instruments such as electrocautery devices and lasers are used to cut or coagulate tissue. This smoke contains harmful chemicals, viable cellular material, and ultrafine particles, many of which are carcinogenic and small enough to penetrate standard surgical masks and helmets. Prolonged exposure to these contaminants can lead to respiratory risks, eye irritation, nausea, and long-term health effects such as chronic respiratory conditions like lung cancer. The challenge is further exacerbated in enclosed operating rooms, where continuous exposure to such smoke can compromise the health and efficiency of the surgical team.
[003] Conventional surgical helmets and face shields primarily focus on protecting the wearer from splashes and droplets but provide minimal respiratory protection. These traditional systems lack effective filtration mechanisms to capture ultrafine particles present in cautery smoke, leaving healthcare professionals vulnerable to inhalation of harmful contaminants during procedures.
[004] The available prior art designs offer rigid configurations that are difficult to adapt to different surgical scenarios or individual preferences. Many systems integrate fixed lighting solutions with limited adjustment capabilities, restricting their utility across various procedures. The non-modular nature of these surgical helmets prevents users from customizing airflow, filtration, or lighting based on specific requirements. In orthopedic surgeries, such as hip or knee replacements, surgeons often use basic helmets or may only need light for better visibility. In other situations, such as surgeries that create a lot of cautery smoke, or when operating on patients with diseases like HIV Positive patients, surgeons need stronger respiratory protection. However, most of the helmets available today are heavy, include parts like chin bars that limit view angles or restrict vision, and are not comfortable to wear for long periods of time.
[005] In hospitals and medical facilities, Powered Air-Purifying Respirators (PAPRs) are used by healthcare workers operating in environments with airborne disease hazards. These are worn when working with patients who have illnesses related to highly infectious diseases like tuberculosis, COVID-19, H1N1 flu, or other infections that can spread by breathing infectious aerosols. PAPRs are also used in special rooms for isolation, in emergency care, and during procedures that produce aerosols, such as inserting a breathing tube. Outside of surgery, they are also worn in labs, autopsy rooms, and places where workers handle dangerous germs. PAPRs help by giving clean, safe, filtered air to the person wearing them, which helps to reduce the chance of breathing in harmful particles. These respirators are especially useful during disease outbreaks or in areas where protection from airborne infection is important.
[006] Another challenge with traditional helmets is noise and airflow issues. Many existing systems have noisy fans or inefficient airflow management, leading to distraction and discomfort for the surgeon.
[007] Existing protective systems used in surgical and infectious environments do offer a level of protection to healthcare workers. However, they are often expensive and may not be accessible to all medical facilities. Many of these systems also come with added costs related to charging units, maintenance, or replacement parts. This makes it difficult for smaller hospitals or clinics to use them regularly. Therefore, there is a need for a protective system that is modular, light, ergonomic and comfortable to wear for long duration surgeries. Also, there is a need for a system that eliminates expensive battery charging units. Further, there is a need for a system which is flexible to adjust according to the head size of the wearer. Such systems shall need to be procured in multiples of 4 or 6 to make the unit economics work, which prevent a consultant surgeon working in multiple hospitals to buy and use as a Personal protective equipment.
[008] Existing protective systems are used by multiple healthcare professionals in a hospital. The cushions and features of the product, which is exposed to sweat of surgeons, cannot be affordably cleaned or is it affordable for the consultant surgeons to use as personal protective equipment. Further due to such design configurations the respiratory protection protective equipment cannot be used by single consultant surgeons as his / her own personal protective equipment.
[009] Conventional Powered Air-Purifying Respirators (PAPRs) were originally developed for industrial environments, such as mining operations. These conventional designs are characterized by their bulky and heavy configurations, often incorporating back or waist-mounted filtration units connected to the headgear via long, serrated tubing. While such systems may be suitable for industrial use, they are ill-suited for clinical or surgical settings, where healthcare professionals, particularly surgeons, must maintain high levels of concentration and physical endurance during procedures that may last between 2 to 10 hours. The excessive weight and poor ergonomics of traditional PAPRs can result in significant user discomfort, including back strain and fatigue, which may compromise procedural precision and overall safety. Furthermore, the extended tubing and complex air delivery pathways complicate disinfection and reprocessing, thereby posing additional risks in sterile environments. Accordingly, there exists a critical need for a lightweight, ergonomically optimized, and easily maintainable PAPR system specifically designed for extended use in medical environments.

OBJECTIVE OF THE INVENTION
[0010] The objective of the present invention is to provide a wearable respiratory personal protective system, including a head-mounted structure, a powered air supply mechanism, a removable hood, and an head-mounted structure configured to receive modular attachments, thereby enabling adaptable protection for healthcare professionals in surgical and infectious environments.
[0011] Another object of the invention is to enable customization of system functionality through modular attachments including, a filtration module, illumination module, camera module and louver attachment, which allows users to attach or detach functional modules based on operational needs in the healthcare environment.
[0012] Yet another object of the invention is to enable the transformation of the system into a Powered Air-Purifying Respirator (PAPR) by integrating a filtration module. When the filter is attached to the top rear section of the head-mounted unit and a sealed hood is secured to the system, the wearable respiratory personal protective system operates as a PAPR, delivering purified air for enhanced respiratory protection in high-contamination environments. In contrast, when the filtration module is not present, the system functions as a ventilation system, similar to a standard surgical helmet, providing airflow for user comfort without active filtration.
[0013] A further object of the invention is to provide detachable hoods in ethylene oxide (ETO) sterile or non-sterile variants to support versatile application of the system across a variety of environments, including operating theatres (OT), outpatient departments (OPD), and both clinical and non-clinical settings. Yet another object of the invention is to configure the hood to direct exhaust airflow downward below the user’s knee level, thereby reducing the risk of sterile field contamination during surgical or medical procedures.
[0014] Still a further object of the present invention is to provide a filtration module with a filter and fan assembly configured to ventilate air within the system. The filter is capable of capturing at least 99.97% or above of airborne particles of size 0.1 microns or larger, thereby offering respiratory protection against cautery smoke, airborne pathogens, and surgical contaminants.
[0015] An additional object of the invention is to provide a protective cap for covering the filtration module, thereby preventing contamination or damage when not in use.
[0016] A further object of the present invention is to provide an illumination module with brightness control, aperture control and directional positioning mechanism of the light source, allowing improved visibility in surgical environments by directing focused light onto the surgical field.
[0017] Still a further object of the present invention is to integrate a high-definition camera module releasably mounted on or integrated with the illumination module, enabling real-time or recorded capture of surgical procedures for purposes such as procedural analysis, medical training, and insurance documentation through an imaging device such as a camera. The camera module may optionally include wireless connectivity features such as Bluetooth or Wi-Fi for seamless transmission of video data. Additionally, a laser or laser-simulated indicator may be releasably mounted on the camera to provide a visible reference of the camera’s capture zone, aiding the user in aligning the field of view during operation.
[0018] Yet the further object of the present invention is to incorporate a ventilation monitoring system, including airflow sensors, a pressure sensor, and a fan speed controller, to monitor airflow conditions and detect filter clogging in real time, thereby maintaining optimal ventilation efficiency. Upon detecting adverse ventilation conditions, such as restricted airflow, clogged filters, or low battery status, the system may activate user alerts through audible alarms, visual indicators, or tactile feedback, prompting the user to take corrective actions such as replacing the filter or recharging the power source.
[0019] Another object of the present invention is to provide a user-controlled control system that allows manual selection of airflow, lighting, imaging and operational modes, ensuring customized user preferences. The control system further supports multiple operational modes including ventilation mode, PAPR mode, lighting mode, imaging mode, hybrid mode, and airflow redirection mode, based on the configuration of attached modules.
[0020] Yet another object of the present invention is to enhance user comfort with an adjustable fitting mechanism, which includes a knob, button, bands, and a cushion attachment, ensuring a secure and customizable fit for different head sizes while redistributing weight for prolonged wearability.
[0021] A further object of the present invention is to provide a louver attachment that redirects airflow away from the user’s face, preventing dryness and discomfort caused by direct air exposure.
[0022] Still a further object of the present invention is to provide a head-mounted structure configured to support plug-and-play modular attachments, allowing tool-free installation and removal. This design enables rapid customization of the system based on specific operational requirements, allowing healthcare professionals to seamlessly switch between ventilation, PAPR, lighting, imaging, and airflow redirection modes.
[0023] Yet a further object of the present invention is to provide a lightweight, ergonomically balanced wearable respiratory personal protective system, ensuring extended usability without causing user fatigue.
[0024] Furthermore, the object of the present invention is to provide a rechargeable power source capable of delivering at least 6 hours of continuous operation, ensuring uninterrupted functionality in medical environments. Such power sources may be recharged with or without dedicated charging devices.
[0025] An additional object of the present invention is to offer a cost-effective, reusable solution, reducing long-term ownership costs while maintaining high-standard protection for healthcare professionals.
[0026] One more object of the present invention is to ensure plug-and-play modularity in the head-mounted structure, enabling quick placement or upgrades of modular attachments without requiring specialized tools.
[0027] Another object of present invention is to provide a wearable respiratory personal protective system configured to support modular components without the need for a chin bar or lower jaw support, thereby enhancing user comfort and reducing obstructions in the facial area.
[0028] The final object of the present invention is to provide a wearable respiratory personal protective system designed as a head-mounted unit, which eliminates the need for external tubing or piping. This design provides a lightweight, compact, self-contained, and fully integrated system that supports prolonged surgical procedures while improving user comfort, mobility, and operational efficiency.

SUMMARY OF THE INVENTION
[0029] According to the present invention, a wearable respiratory personal protective system is provided. The wearable respiratory personal protective system includes a head-mounted structure that houses a powered air supply mechanism, and it is configured to be worn by a user along with a hood. The powered air supply mechanism comprises a fan configured to direct filtered air toward the user’s breathing zone. Additionally, the head-mounted structure includes an interface configured to receive modular attachments.
[0030] In one aspect, a hood is removably attachable to the head-mounted structure and is designed to cover at least a portion of the user’s head, face, and neck. The hood includes a transparent visor, a fabric drape, and an attachment mechanism. The transparent visor is configured to extend over the face of the user. The fabric drape extends from the visor and configured to cover the neck and shoulders of the user. The attachment mechanism is positioned to secure the hood to side regions of the head-mounted structure.
[0031] In an aspect, the hood is a splash-protective hood and is configured for single-use applications during surgical and non-surgical procedures.
[0032] In an aspect, the hood is provided in a sealed or unsealed configuration, wherein the sealed hood includes a sealing edge surrounding the facial chamber, configured to enclose the breathing zone of the user.
[0033] In an aspect, the hood is further configured to direct exhaust airflow downward below the user’s knee level to minimize contamination of a sterile field like operating table.
[0034] In an aspect, the system is configurable as a Powered Air-Purifying Respirator (PAPR) when the filter and sealed hood are attached. In this mode, the system delivers filtered air to the user’s breathing zone, enhancing respiratory protection from airborne contaminants.
[0035] In an aspect, the filtration module includes a detachable air filter arranged within a protective housing of the wearable respiratory personal protective system and is configured to remove airborne contaminants from the air drawn in to the system to a filtration efficiency of at least 99.97% or above of airborne particles of size 0.1 microns or larger. The filtration module further includes a real-time airflow monitoring system configured to detect clogging and dynamically adjust airflow.
[0036] In another aspect, the illumination module is attachable to a front portion of the head-mounted structure and includes a light source positioned at an angle to direct illumination toward a surgical field. The illumination module further includes a positioning mechanism that enables automatic or manual brightness or directional control of a light source toward a target area. Illumination output is regulated based on user input, wherein if the illumination module is attached, brightness control and angular adjustment are enabled via brightness controlling and positioning mechanisms respectively.
[0037] In yet another aspect, the wearable respiratory personal protective system includes a camera module, releasably mounted on the illumination module. The camera module is configured to capture real-time and record video or images of the user’s field of view and may include capabilities for recording, storage, or wireless transmission to an external display or network. The camera module further includes a directional adjustment mechanism and may optionally integrate with the control system for activating recording, adjusting resolution, or switching between streaming and local capture modes. Additionally, a laser or laser-simulated indicator may be releasably mounted on the camera to provide a visible reference of the camera’s capture zone, aiding the user in aligning the field of view during operation.
[0038] In further aspect, the louver attachment is removably positioned at a front lower section of the head-mounted structure and is configured to modify airflow direction. When the louver attachment is installed, airflow is redirected away from the user’s face to prevent discomfort caused by direct air exposure, reduce dryness and irritation.
[0039] In another aspect, the system includes a power source, externally attached through power cables, to the rear section of the head-mounted structure, positioned on the upper surface of the head-mounted structure and configured to supply electrical energy to the wearable respiratory personal protective system including filtration module, illumination module, camera module, and control system, ensuring prolonged operation during medical procedures.
[0040] In yet another aspect, the system includes a control system, positioned within the head-mounted structure, manages system operations either automatically or based on user-selected modes. It enables both manual and automatic adjustment of airflow settings, illumination levels, and camera functions. To ensure optimal ventilation, the control system is further configured to adjust fan speed in response to real-time data from a pressure sensor located within the head-mounted structure and associated with the head-mounted structure. Additionally, a ventilation monitoring system is provided to regulate airflow and continuously monitor the clogging status of the filtration module in real time.
[0041] In an aspect, the adjustable fitting mechanism comprises a knob, a button, bands, and a cushion attachment, allowing the user to adjust the circumference and height of the wearable respiratory personal protective system while ensuring a comfortable fit. The cushion attachment is positioned between the upper surface of the head-mounted structure and head of the wearer and is adjustable forward and backward to accommodate different head sizes and improve weight distribution and comfort.
[0042] In a further aspect, the wearable respiratory personal protective system includes a protective cap for covering the filtration module, preventing the filter from contamination and damage, thereby maintaining the integrity and performance of the filtration system during use and storage.
[0043] In furthermore aspect, the wearable respiratory personal protective system is configured to support the modular attachments without requiring a chin bar or lower jaw support. Eliminating such components enhances user comfort, improves facial accessibility, and minimizes visual or physical obstructions. This design makes the system particularly well-suited for extended wear in clinical, surgical, or other healthcare environments.
[0044] According to another aspect of the present invention, a method of operating a wearable respiratory personal protective system is provided. The method includes the steps of receiving user input to determine whether a module including a filter, an illumination module, camera module, and a louver attachment are attached to a head-mounted structure. The method further includes adjusting airflow within the system based on the user-selected settings. If the filter is present, a powered air supply mechanism (fan) is activated to direct filtered air toward the user’s breathing zone. If no filtration module is present, a wearable respiratory personal protective system operates as a standard operational protective system with fan. If the louver attachment is present, airflow is adjusted to be redirected away from the user's face. Additionally, the method allows user-controlled selection of different operating modes, including a ventilation mode when only a fan is operating, and filter or illumination module is not attached. This is a default mode of system operation. Other modes are, a PAPR mode when the filter is attached to the top rear section and the splash-protective sealed hood is attached to the wearable respiratory personal protective system, a lighting mode when the illumination module is attached, a hybrid mode when both the filtration module and illumination module are attached, an airflow redirection mode when the louver attachment is installed and an imaging mode when the camera module is attached. All the modes are working along with the ventilation mode.
[0045] The method further includes monitoring airflow conditions using a pressure sensor to detect clogging of the filter based on airflow resistance readings. Based on the detected airflow resistance, fan speed may be manually or automatically adjusted to maintain airflow efficiency. Further the control system provides an alert when the filtration module requires replacement.
[0046] In a further aspect of the present invention, a head-mounted unit is provided that is lightweight, ergonomically balanced, and designed with an optimized center of gravity. This structural configuration enables prolonged wear with reduced physical fatigue and enhanced comfort, making it particularly suitable for extended use in surgical and clinical environments. The system is further designed as a cost-effective and reusable solution, allowing individual use by consultant surgeons across multiple facilities. By supporting a high degree of customization through modular attachments, the invention ensures adaptable protection, operational efficiency, and sustained respiratory safety for healthcare professionals working in surgical, clinical, and infectious disease settings.

BRIEF DESCRIPTION OF THE DRAWINGS
[0047] The disclosure will be described and explained with additional specificity and detail with the accompanying figures in which:
[0048] Figure 1 illustrates an isometric view of a wearable respiratory personal protective system in accordance with an embodiment of the present disclosure;
[0049] Figure 2 illustrates another schematic representation of the surgical helmet system in accordance with an embodiment of the present disclosure;
[0050] Figure 3 illustrates the arrangement of a filtration module on the head-mounted structure of the wearable respiratory personal protective system;
[0051] Figure 4 is a cross-sectional view of the ventilation and filtration system in accordance with an embodiment of the present disclosure;
[0052] Figure 5 is an isometric view of the wearable respiratory personal protective system with detachable illumination module;
[0053] Figure 6 illustrates an isometric view of the wearable respiratory personal protective system depicting a power cable and an externally positioned battery pack connected to the head-mounted structure;
[0054] Figure 7 illustrates another isometric view of the wearable respiratory personal protective system showing the location of the power button integrated on the rear section of the head-mounted structure;
[0055] Figure 8 illustrates a front view of a surgical hood to be worn in conjunction with the wearable respiratory personal protective system;
[0056] Figure 9 illustrates a front view of a sealed hood designed to be used with the filter in PAPR mode;
[0057] Figure 10 illustrates a side view of the sealed hood shown in Figure 9; and
[0058] Figure 11 is a flowchart representing the method of operating the wearable respiratory personal protective system in accordance with the present invention.
[0059] Further, those skilled in art will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the figures with details that will be readily apparent to those skilled in the art having the benefit of the description herein.

DETAILED DESCRIPTION OF THE INVENTION
[0060] For the purpose of promoting an understanding of the principles of the disclosure, reference will now be made to the embodiment illustrated in the figures and specific language will be used to describe them. It will nevertheless be understood that no limitation of the scope of the disclosure is thereby intended. Such alterations and further modifications in the illustrated system, and such further applications of the principles of the disclosure as would normally occur to those skilled in the art are to be construed as being within the scope of the present disclosure.
[0061] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more devices or sub-systems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other devices, sub-systems, elements, structures, components, additional devices, additional sub-systems, additional elements, additional structures, or additional components. The appearance of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.
[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. The system, methods, and examples provided herein are only illustrative and not intended to be limiting.
[0063] In the following specification and the claims, reference will be made to a number of terms, which shall be defined to have the following meanings. The singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise.
[0064] Referring now to Figure 1, a wearable respiratory personal protective system (hereinafter referred to as "system (100)") with modular attachments in accordance with the present invention is provided. In the present embodiment, the system (100) is a surgical helmet designed to enhance safety, comfort, and functionality for users, including surgeons and healthcare professionals. The system (100) is configured to provide respiratory protection, illumination, and airflow control through a combination of modular components. The system (100) comprises a head-mounted structure (130), an adjustable fitting mechanism (120), a ventilation monitoring system (140), and a control system (150) (as shown in figure 4).
[0065] The head-mounted structure (130) forms the main body of the system (100) and is configured to be worn on a user's head. In the present embodiment, the head-mounted structure (130) includes the interfaces which is a mounting platform for various modular attachments, including a filtration module (102a, 102d, 102c), an illumination module (104), camera module (105) and a louver attachment (106). The head-mounted structure (130) is constructed from lightweight, durable material. In the present embodiment, the system (100) is modular and ergonomically balanced. When modular components such as the illumination module (104), camera module (105) and filtration module (102) are added, the weight is distributed between the front and rear of the head-mounted structure (110) to reduce strain on the user’s neck. The head-mounted structure (110) is configured to support the modular components without requiring a chin bar or lower jaw support.
[0066] The head-mounted structure (130) is mounted on two-way adjustable head band (120) includes a base (115), an upper surface (111), a front portion (112), and baa rear section (113). The upper surface (111) supports the head-mounted structure for attaching modular components, while the front section (112) supports the front side of the head-mounted structure, and the rear section (113) supports rear side of the head-mounted structure and includes adjustable fitting mechanism (124 & 126) (as shown in Figure 1). As shown in figures 6 and 7, the power button is positioned at the rear external surface of the head-mounted structure (130).
[0067] The two-way adjustable head band (120) ensures that the system (100) can be securely worn on the user’s head. The two-way adjustable head band (120) includes a knob (122), a button (124), bands (126) and a cushion attachment (128). The knob (122) is for adjusting the circumference of the head-mounted structure (110) to fit different head sizes. The button (124) adjusts the height of the head-mounted structure (110) to provide a comfortable fit. The bands (126) help to adjust & secure the system (100) around the user’s head. The cushion attachment (128) is positioned between the head-mounted structure (110) and the head of the user to provide comfort and redistribute weight. The cushion attachment (128) is adjustable forward and backward to balance the weight of the attached modules, accommodate different head sizes, redistribute weight, and reduce pressure points.
[0068] The power button (116) enables manual activation or deactivation of the control system (150) and the attached modules. The power for the control system (150) and connected modules is supplied through the power cable (118) routed to the external power source (160). In the present embodiment, the power source (160) is a portable, externally mounted battery pack configured to supply electrical energy to the system, including filtration module (102), illumination module (104), camera module (105) and control system (150) via the power cable (118). The power source (160) may be a rechargeable one and may also include charge status indicators and is detachable for replacement or recharging between uses. In the present embodiment, the power source (160) is a rechargeable lithium-ion battery with a capacity of 10,000 mAh, configured to provide at least 6 hours of continuous operation at maximum load. A four-level LED indicator is located on or near the battery housing to indicate the current charge level. The battery is detachable and may be replaced or recharged between uses. In the present embodiment, the illumination module (104) is positioned toward the front, and the power source (160) is positioned at the rear, balancing the load during extended use.
[0069] Further, the interfaces are positioned on the upper surface (111) of the head-mounted structure (130) and configured to removably receive the modular attachments, including at least one of the filtration module (102), illumination module (104) and louver attachment (106) as shown in figure 2. Optionally, as illustrated in Figure 1, the camera module (105) may optionally be mounted on the illumination module (104). The interface on the head-mounted structure (130) allows for plug-and-play attachment and removal of the modular attachments without requiring specialized tools. The interface on the head-mounted structure (130) includes attachment slots, electrical connectors and a locking mechanism.
[0070] The attachment slots are configured to securely hold the detachable filter (102a), illumination module (104), camera module (105) in place. The electrical connectors supply power to the filtration module, illumination module (104) and camera module (105) and the locking mechanism ensures stable positioning of the louver attachment (106).
[0071] Referring now to figure 3, the filter (102a) is attached to the interface on the head-mounted structure (130) and provides respiratory protection by filtering airborne contaminants from air drawn into the system. The filtration module (102) includes a detachable air filter (102a), a powered air supply mechanism (102b), a real-time airflow monitoring system and a protective cap (107).
[0072] In the present embodiment, the detachable air filter (102a) is arranged within a protective housing (102c) of the system (100) as shown in figure 3. Especially within a cavity (102d) on the interface on the head-mounted structure (130) which is open and closed by the protective cap (107). The protective cap (107) is a lid arrangement having a pivotable pin to facilitate the open and close position. The air filter (102a) is a HEPA filter capable of capturing at least 99.97% or above of airborne particles of size 0.1 microns or larger. It may be obvious to a person skilled in the art to use any other obvious air filters as an alternative to HEPA filter. In other embodiments, alternative types of air filters may be used in place of the HEPA filter, such as ULPA filters, activated carbon filters, electrostatic filters, or other filters suitable for removing airborne contaminants.
[0073] The powered air supply mechanism (102b) includes a fan assembly, positioned within the filtration module (102) and configured to direct filtered air downward toward the user’s breathing zone as shown in figure 4. The real-time airflow monitoring system is arranged within the head-mounted structure (130). The real-time airflow monitoring system includes a pressure sensor (142) for detecting clogging and dynamically adjusting the fan speed. Further, the protective cap (107) covers the filtration module (102), preventing the filter (102a) from contamination and damage. In the present embodiment, the filtration module (102) is positioned at the upper rear portion of the interface on the head-mounted structure (130) and can be attached-detached or upgraded as needed.
[0074] In one embodiment as shown in figure 8, a surgical hood (170) is provided for use in splash-prone environments. The hood (170) is removably attachable to the two-way adjustable head band (110). The hood (170) includes a clear polycarbonate transparent visor (172), a fabric drape (174), and an attachment mechanism (176). The fabric drape (174) is made from EO-sterilized SMMS fabric and non-sterilized variant. The transparent visor (172) covers the user’s face and is shaped to allow visibility and compatibility with surgical loupes. The fabric drape (174) extends to the shoulders and upper chest, providing a physical barrier without sealing the head space. The hood (170) is attached to the two-way adjustable head band (110) using the attachment mechanism (176) such as magnets and Velcro strips and includes a porous fabric zone over the airflow intake area to allow adequate ventilation.
[0075] In an embodiment, the hood (170) is a splash-protective hood and is configured for single-use applications during surgical and non-surgical procedures. Further, the hood (170) is provided in a sealed or unsealed configuration, wherein the sealed hood (170) includes a sealing edge (175) surrounding the facial chamber, configured to enclose the breathing zone of the user. The hood (170) is further configured to direct exhaust airflow downward below the user’s knee level to minimize contamination of a sterile field like operating table.
[0076] Further in the embodiment as shown in figures 9 and 10, the system (100) is modularly designed to allow seamless conversion into a Powered Air-Purifying Respirator (PAPR). This is achieved by attaching the filter (102a) at the rear top side of the head-mounted structure (130) and mounting the sealed hood (170). Upon conversion, the powered air supply mechanism (102b) delivers filtered air under positive pressure into the hood space, providing high-grade respiratory isolation, providing respiratory protection against cautery smoke, particulate matter and other airborne contaminants. The sealed hood (170) includes a sealing edge (175) surrounding the facial chamber and is provided for PAPR mode to offer full respiratory protection. This hood (170) includes a rigid transparent visor (172) that encloses the face, and a non-porous SMMS fabric forming a sealed enclosure around the user's head and neck. An elastic seal runs along the edge of the visor to minimize leakage. The hood (170) attaches to the helmet using the attachment mechanism (176) such as magnetic and Velcro components and includes a porous airflow section positioned to align with the intake from the filtration module. This sealed configuration is specifically designed for high-containment environments requiring enhanced protection. Additionally, the hood (170) is configured to direct exhaust airflow downward, below the user’s knee level, thereby minimizing contamination of the sterile field.
[0077] Referring now to figure 5, the illumination module (104) is attachable to the front portion (112) of the head-mounted structure (130) and is configured to provide adjustable lighting for surgical environments. In the present embodiment, the illumination module (104) is mounted within a recess portion/attachment slots arranged on the head-mounted structure (130). The illumination module (104) includes a light source (104a), a positioning mechanism (104b) and a feedback system.
[0078] The light source (104a) is positioned at an angle to direct illumination toward a surgical field. The positioning mechanism (104b) enables angular adjustment of the light source (104a) relative to the interface on the head-mounted structure (130). The feedback system is positioned within the illumination module (104) and provides user alerts for status via audible or visual indicators. Specifically, the feedback system is positioned within the illumination module (104) and is configured to provide audible alerts such as beeps or tones when the user performs lighting-related operations, such as brightness adjustment, toggling the light ON/OFF or cycling through fixed brightness levels. In some embodiments, the feedback system also includes visual indicators such as status LEDs to signal illumination activation or system readiness.
[0079] Referring to figure 1 and 6, a camera module (105) is removably attached to the front portion (112) of the two-way adjustable head band (110) and on top of illumination module (104). The camera module (105) includes a camera (105a), and a laser or laser-simulated indicator (105b) hereinafter referred to as a laser. The laser (105b) is removably attached to the camera (105a). The camera (105a) is configured to capture high-definition video or still images of the field in real time, recording or transmission of captured data. The camera module (105) includes an integrated wireless communication interface, comprising at least one of Bluetooth or Wi-Fi, enabling live streaming or recording of surgical footage to an external display or network-connected device for applications such as medical documentation, training, or insurance compliance.
[0080] In an embodiment, the camera module (105) further comprises a laser light or laser-simulated indicator (105b), configured to project a capture field boundary or target point onto the targeted site. This allows the user to precisely align the field of view. The camera (105a) is optionally connected to the control system (150) for mode-based operation, such that it activates only in specific user-selected modes (e.g., camera mode or hybrid mode).
[0081] In one embodiment, the camera settings such as resolution, field of view, and recording mode can be controlled via user head-mounted structure buttons (152) or preconfigured control logic in the microprocessor (151).
[0082] Further referring to figure 2, the louver attachment (106) is removably positioned at the front lower section of the head-mounted structure (130) and is configured to modify airflow direction. The louver attachment (106) prevents discomfort caused by direct airflow by diffusing air away from the user's face. The louver attachment (106) includes airflow redirection fins and a removable locking mechanism. The airflow redirection fins are arranged to channel air outward and away from the user's face. The removable locking mechanism allows the user to attach or detach the louver attachment (106) as required.
[0083] The ventilation monitoring system (140) is configured to regulate airflow within the system (100) and monitor operational conditions of the filtration module (102). The ventilation monitoring system (140) includes a switch (144) to detect the presence of the filter, airflow sensors, a pressure sensor (142) (differential or absolute) arranged downstream of the filter to detect clogging, a fan speed controller and a feedback system. The airflow sensors are arranged within the head-mounted structure (130) to measure airflow rate and ensure adequate ventilation within the system (100). The pressure sensor is positioned within the head-mounted structure (130) to detect changes in airflow resistance, indicating potential clogging of the filter (102a). Specifically, the pressure sensor (142) is arranged downstream of the filter and is configured for continuous monitoring of pressure or airflow to detect clogging levels of the filter. In the present embodiment, the pressure sensor (142) or the airflow sensor is mounted downstream of the filter to allow pressure differential or velocity-based clog detection as shown in figure 4. Further, the switch (144) is positioned at the mounting area of the filter to detect whether the filter is properly seated or missing and provides feedback to the control system (150) to enable or disable air circulation functions accordingly. The pressure sensor (142) and the switch (144) provide input to the control system (150) for dynamic airflow regulation. The control system (150) receives inputs from the pressure and airflow sensors, and from the filter presence detection sensor to automatically regulate fan performance. The airflow rate in the system is dynamically regulated and may range between 180 liters per minute (LPM) and 540 LPM, depending on operating conditions. When the system (100) is configured as a loose-fitting helmet in PAPR mode, the nominal airflow is maintained at approximately 175 LPM, ensuring consistent positive pressure around the user’s breathing zone.
[0084] When clogging is detected, a microprocessor (151) increases the fan speed to maintain airflow. The sensors send input to the control system (150), which regulates fan speed either automatically or manually. The feedback system includes visual or audio indicators to alert users of clogging or airflow changes.
[0085] In an embodiment, the fan speed controller is configured to manually adjust or dynamically regulate airflow based on pressure sensor readings, ensuring consistent airflow during extended use. The fan controller operates in coordination with the control system (150) and adjusts speed in response to resistance caused by filter clogging or user-selected settings. When the system is configured as a loose-fitting PAPR, the airflow is maintained at a minimum of 175 liters per minute (LPM), in accordance with the airflow requirements specified by NIOSH (National Institute for Occupational Safety and Health) for loose-fitting respirators.
[0086] In an embodiment, audio/ visual alerts may also be provided for fan speed changes and/ or filter clogging conditions. The feedback system is positioned within the ventilation monitoring system (140) and may provide user alerts for ventilation and pressure status via audible or visual indicators. In some embodiments, the feedback system also includes visual indicators such as status LEDs to signal airflow pressure or pressure clogging.
[0087] In an embodiment, the system (100) includes a set of alert indicators to assist the user during operation as shown in figure 2. A filter life indicator (131) is located on the helmet and uses colored LEDs to show the status of the filter: blue for normal, yellow for nearing the end of life, and red for immediate replacement. A filter seal indicator (132) warns the user if the filter is not properly attached; this uses a red LED and a short buzzer sound if unsealed. The illumination module includes its own LED indicator (133) showing whether it is correctly connected (blue = functional, red = not connected). A battery indicator (134) located on the rear of the helmet displays charge level through four LEDs and issues audible beeps at 25% and 10% battery levels. The illumination module has a connection status LED showing blue when operational and red when disconnected. A system power status LED (135) confirms overall activation as shown in figure 7. The alerts help maintain safe and informed use of the system throughout its operation.
[0088] The control system (150) is positioned within the head-mounted structure (110) and is configured to regulate system operation based on user-selected settings. The control system (150) enables manual selection of different operating modes, including adjustments for airflow settings, illumination levels, camera and laser settings. The control system (150) includes one or more printed circuit boards (PCBs), including a main PCB and auxiliary PCBs, arranged longitudinally along the inner cavity of the head-mounted structure (130). The PCBs are electrically connected to various modules and components, including airflow sensors, pressure sensors, fan controller circuits etc. The control system (150) includes a microprocessor (151), user head-mounted structure buttons (152), pressure and airflow sensor interfaces, and circuitry to manage user inputs, fan speed adjustments, illumination, camera and laser settings. The microprocessor (151) mounted on the main PCB is configured to execute control logic based on real-time sensor inputs. The microprocessor (151) is configured to manage various user-selected operational modes for the filtration module (102), illumination module (104), camera module (105) and louver attachment (106). In an embodiment, the user interface buttons (152), allow manual adjustments of fan speed, lighting brightness, camera focus and laser based on user preference. The power button, positioned on the external rear section of the head-mounted structure (130), is electrically connected via wiring to the main PCB. Upon activation by the user, the power button initializes the control system (150) and powers the connected components such as the fan, illumination module (104), camera module (105) and sensor arrays.
[0089] In an embodiment, the power source (160) is attached to the rear section of the head-mounted structure (130) through power cable (118) and is configured to supply electrical energy to the system (100). The power source (160) is a rechargeable lithium-ion battery capable of providing at least 6 hours of continuous operation at maximum settings.
[0090] For example, in a surgical environment where a surgeon performs a hip replacement procedure. In this scenario, the surgeon requires respiratory protection, additional focused illumination, and optimized airflow control to ensure a safe and efficient working environment.
[0091] Before the procedure, the surgeon wears the system (100) by adjusting the adjustable fitting mechanism (120). The surgeon turns the knob (122) to secure the two-way adjustable head band (110) around the head and presses the button (124) to adjust the height. The bands (126) further stabilize the fit, while the cushion attachment (128) is slid forward or backward to balance weight distribution and reduce pressure points.
[0092] Once the system (100) is secured, the surgeon attaches the necessary modular components to the head-mounted structure (130). The surgeon inserts the detachable filter (102a) into the filtration module (102) housing and locks the module into the cavity (102d) of the head-mounted structure (130). The powered air supply mechanism (102b) is activated, drawing in external air through the filter.
[0093] The surgeon attaches the illumination module (104) to the front portion (112) of the head-mounted structure (130). Using the positioning mechanism (104b), the surgeon adjusts the light source (104a) to direct focused illumination toward the surgical field.
[0094] Optionally, the surgeon may mount the camera module (105) on the illumination module and attach to the head-mounted structure (130). The camera (105a) enables real-time or recorded capture of surgical procedures for purposes such as procedural analysis, medical training, and insurance documentation. Additionally, a laser (105b) may be included to provide a visible reference of the camera’s capture zone, aiding the user in aligning the field of view during operation.
[0095] To prevent airflow from blowing directly onto the face, the surgeon attaches the louver attachment (106) to the front lower section (112) of the head-mounted structure (130). The louver redirects air outward and away from the face, reducing dryness and discomfort.
[0096] With modules attached, the control system (150) enables the user to manually or automatically select operating modes based on the presence of the filter (102a), illumination module (104), camera module (105). The system (100) enters an operating mode, such as ventilation, PAPR, illumination, hybrid, or airflow redirection based on the configuration of the attached modules. The control system (150) allows the user to override automatic selections through user interface buttons (152) to manually adjust airflow, illumination settings and camera settings according to preference or surgical requirements.
[0097] The ventilation and monitoring system (140) continuously monitors airflow resistance through the pressure sensor. If clogging is detected in the filter (102a), the control system increases fan speed to maintain airflow. The surgeon may adjust fan speed manually through the feedback system, which may provide audible or visual feedback upon each adjustment. If the filter (102a) is present, the airflow is automatically regulated to meet or exceed 175 LPM during PAPR operation, as per NIOSH standards.
[0098] As the surgery progresses, the power source (160) ensures a continuous power supply for at least 6 hours. After completing the procedure, the surgeon removes the modular attachments for cleaning and storage. The filter (102a) may be detached, and the protective cap (107) is placed over the filtration module (102) for storage.
[0099] In an ICU setting, a healthcare worker may use the system (100) in PAPR mode for protection against airborne pathogens, such as during a COVID-19 patient examination. In this case, the filter (102a) is attached to the top rear section head-mounted structure (130), converting the system into PAPR mode. The powered air supply mechanism (102b) delivers continuously filtered air to the breathing zone. The louver attachment (106) may be removed to allow direct airflow to the user’s face. The control system (150) dynamically adjusts fan speed to maintain a consistent air supply. If the filter (102a) is present, the airflow is automatically regulated to meet or exceed 175 LPM during PAPR operation, as per NIOSH standards. The external power source (160) ensures prolonged operation, allowing the healthcare workers to use the system throughout the shift.
[00100] Referring now to figure 11, a method (200) for operating a wearable respiratory personal protective system (100) is provided. For the sake of brevity, the method (200) is described in conjunction with the system (100) as disclosed in the present application. The method (200) enables modular attachment detection, air flow regulation, illumination adjustment, camera and laser focusing, clogging detection, and operational control of the system (100).
[00101] The method (200) starts at step 210.
[00102] At step 220, the control system (150) receives user input to determine whether at least one of the modules including filter (102a), illumination module (104), camera module (105) and louver attachment (106) is attached to the head-mounted structure (130). The head-mounted structure (130) provides secure attachment points for these modular attachments, allowing the user to select the corresponding operating mode. In an embodiment, if no module is attached, system (100) operates in ventilation mode.
[00103] At step 230, the ventilation monitoring system (140) adjusts airflow based on user-selected settings, considering the presence or absence of the filter (102a) and the position of the louver attachment (106). If the filter (102a) is attached, the powered air supply mechanism is activated, drawing in air through the filter (102a). If the louver attachment (106) is installed, airflow is redirected away from the user's face to prevent discomfort. If the filter (102a) is absent, the PAPR system is disabled however ventilation mode with fan (102b) remains activated.
[00104] At step 240, the illumination module (104) is attached, which activates the illumination control system. The system (100) enables directional positioning of the light source (104a) using the positioning mechanism (104b). If the illumination module (104) is not attached, the control system (150) deactivates the lighting function to conserve energy.
[00105] At step 250, the camera module (105) is attached, thereby activating the camera control system. The system (100) allows the user to adjust the camera focus based on specific requirements. If the camera module (105) is not attached, the control system (150) automatically disables the camera functionality to conserve power.
[00106] At step 260, the ventilation monitoring system (140) continuously monitors airflow conditions within the filtration module (102). A pressure sensor (142) positioned within the head-mounted structure (130) detects changes in airflow resistance due to filter clogging. If a threshold resistance level is reached, indicating partial or complete clogging, an alert is generated for user notification.
[00107] At step 270, based on airflow resistance detected in step 260, the control system (150) dynamically adjusts fan speed to maintain optimal ventilation.
If the pressure sensor detects increased resistance due to the filter (102a) clogging, the fan (102b) speed increases to compensate for restricted airflow. If resistance drops below a set threshold, indicating a clean filter, the fan operates at an optimized speed to reduce noise and conserve battery power. If the filtration module (102) is absent, the fan remains in ventilation mode.
[00108] At step 280, when the pressure sensor detects significant clogging, the control system (150) triggers an alert to notify the user that the filter (102a) requires replacement. The alert is conveyed through audio-visual indicators on the control panel of the head-mounted structure (130). An audible alarm may be activated to signal urgent filter maintenance. If the filter is replaced, the control system (150) resets the airflow parameters to match the new component.
[00109] At step 290, the control system (150) adjusts the operating mode of the system (100) based on user input regarding the configuration of modular attachments.
[00110] The following user-selected operating modes are available:
[00111] Ventilation Mode - Activated when fan-assisted airflow is required without the filter (102a) based on user configuration. This is the default mode of the system (100).
[00112] PAPR Mode - Activated when the filter (102a) is installed at the top rear section of the head-mounted structure (130) in the cavity (102d), transforming the system into a Powered Air-Purifying Respirator (PAPR).
[00113] Lighting Mode - Activated when the illumination module (104) is attached, enabling brightness and angle adjustments of light source.
[00114] Imaging mode - Activated when camera module (105) is attached, enabling capturing of images or videos during the surgeries or medical treatments. Laser mounted on the camera may also be activated.
[00115] Hybrid Mode - Activated when both the filter (102a) and illumination module (104) are present, ensuring simultaneous operation of airflow filtration and surgical lighting.
[00116] Airflow Redirection Mode – Activated when the louver attachment (106) is installed, modifying airflow direction away from the user’s face.
[00117] In the present method, in all modes a hood is attached to the head-mounted structure to provide additional user protection during use. The type of hood selected is based on the intended operating mode. For standard surgical applications, a splash-protective unsealed hood is used, which includes a rigid transparent visor (172) and a breathable fabric drape (174) extending over the shoulders and upper chest. The hood is attached to the helmet using magnetic fasteners and Velcro strips arranged along the outer surface of the helmet bands. A section of porous material in the drape aligns with the air intake area of the filtration module or ventilation zone to allow proper airflow into the breathing zone. In the present embodiment, the splash-protective hood formed of EO-sterilized SMMS fabric for use during standard procedures. The splash-protective hood is formed of EO-sterilized SMMS fabric and is configured for single-use applications during surgical procedures.
[00118] For applications requiring respiratory isolation, such as PAPR mode, a splash-protective sealed hood (170) is attached. The sealed hood includes a transparent visor (172) bordered by an elastic sealing edge (175) and is constructed using non-porous SMMS fabric (174) to form a closed chamber around the head and neck of the user. In the present embodiment, the sealed hood (170) is made of non-porous SMMS fabric and includes an elastic sealing edge that forms a closed chamber around the user's head and neck, enclosing the breathing zone for powered air-purifying respirator (PAPR) operation. These detachable hoods are optionally available in ethylene oxide (ETO) sterile or non-sterile variants. The sealed hood is also secured using magnets, Velcro and other securing means and has an airflow zone made of porous material aligned with the intake region. The sealed configuration ensures that filtered air is maintained under positive pressure within the enclosed space. Both types of hoods are single-use, disposable components intended for use during a single procedure. The hood is further configured to direct exhaust airflow downward below the user’s knee level to minimize contamination of a sterile field.
[00119] The method ends at step 300.
[00120] Therefore, the advantage of the present invention is to provide a wearable respiratory personal protective system (100) that integrates modular attachments, including a filter (102a), an illumination module (104), camera module (105) and a louver attachment (106), to enhance respiratory protection, lighting, imaging and airflow control in surgical and healthcare environments. The system (100) features a lightweight and ergonomically balanced two-way adjustable head band (110) with the head-mounted structure (130) that allows plug-and-play customization, enabling healthcare professionals to configure the system based on specific operational requirements. The ventilation monitoring system (140) ensures consistent airflow regulation, while the filter (102a) provides high-efficiency particulate filtration, transforming the system (100) into a Powered Air-Purifying Respirator (PAPR) mode when attached to the top rear section of the head-mounted structure (130) Further, the illumination module (104) offers adjustable brightness and directional positioning of light source (104a) for improved surgical visibility, and the louver attachment (106) redirects airflow away from the user's face to enhance comfort. Further, the camera module (105) enables users to capture images during surgeries. The laser may also be releasably mounted on the camera to assist in locating the target site. The control system (150) enables user-selected operational modes, ensuring ease of operation, adaptability, and prolonged usability. The ergonomic adjustable fitting mechanism (120), including a cushion attachment (128), bands (126), a knob (122), and a button (124), provides a secure and comfortable fit for extended use. The power source (160) delivers at least 6 hours of continuous operation, making the system (100) highly efficient for long surgical procedures.
, Claims:We claim:
1. A wearable respiratory personal protective system (100), comprising:
A head-mounted structure (130) fixed on a two-way adjustable band (110) configured to be worn by a user;
a powered air supply mechanism (102b) integrated within the head-mounted structure (110);
hood (170) removably attachable to the head-mounted structure (130),
the hood (170) comprising:
a transparent visor (172) configured to extend over a face of the user;
a fabric drape (174) extending from the visor and configured to cover the neck and / or shoulders of the user;
an attachment mechanism (176) positioned to secure the hood to side regions of the two way adjustable band (110); and
the head-mounted structure (130) has an interface configured to removably receive at least one modular attachment.

2. The wearable respiratory personal protective system (100) as claimed in claim 1, wherein the hood (170) is designed for splash-protection hood and is configured for single-use applications during surgical and non-surgical procedures.

3. The wearable respiratory personal protective system (100) as claimed in claim 1, wherein the hood (170) is provided in a sealed or unsealed configuration, wherein the sealed hood (170) includes a sealing edge (175) surrounding the facial chamber, configured to enclose the breathing zone of the user.

4. The wearable respiratory personal protective system (100) as claimed in claim 1, wherein the hood (170) is further configured to direct exhaust airflow downward below the user’s knee level to minimize contamination of a sterile field like operating table or away from sterile areas.

5. The wearable respiratory personal protective system (100) as claimed in claim 1, wherein the two way adjustable band (110) includes an adjustable fitting mechanism (120) configured to conform to the head circumference or size of the user and to ergonomically secure the head-mounted structure (130) in place.

6. The wearable respiratory personal protective system (100) as claimed in claim 1, has an interface positioned on an upper surface (111) of the head-mounted structure (130), configured to removably receive the modular attachments selected from a group comprising a filtration module (102), an illumination module (104), a camera module (105) and a louver attachment (106) to enable customization of the wearable respiratory personal protective system (100) based on operational requirements.

7. The wearable respiratory personal protective system (100) as claimed in claim 6, wherein,
the filtration module (102) is positionable on the interface in the head-mounted structure (130) , wherein a control system (150) is configured to detect the presence and position of the filtration module (102), regulate airflow through the filtration module (102), and monitor clogging conditions via a ventilation monitoring system (140), the porous fabric zone on the hood is positioned to align with the air intake location of the filtration module;
the illumination module (104) is positionable on the head-mounted structure (130), wherein the control system (150) is further configured to detect the presence and position of the illumination module (104) and to adjust brightness, aperture, and directional positioning of the light source (104a) based on user input or preconfigured settings;
the camera module (105), positionable on the head-mounted structure (130) , wherein the control system (150) is further configured to detect the presence and position of the camera module (105), activate or deactivate a camera (105a) included in the camera module (105), control video capture settings of the camera (105a), and enable transmission of image and video data from the camera module (105) via at least one wireless communication interface; and
the louver attachment (106) is positionable in the head-mounted structure (130), wherein the louver attachment (106) is configured to adjust airflow direction based on user requirements.

8. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the wearable respiratory personal protective system is configured to transform the wearable respiratory personal protective system into a Powered Air Purifying Respirator (PAPR) by attaching the filtration module (102) at a top rear section of the head-mounted structure (130) of the two way adjustable band (110), thereby providing respiratory protection against cautery smoke, particulate matter and other airborne contaminants.

9. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the filtration module (102) includes;
a detachable air filter (102a) arranged within a protective housing (102c) of the system (100), configured to purify air drawn into the system (100); and
a powered air supply mechanism (102b), configured to direct filtered air toward the user's breathing zone.

10. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the ventilation monitoring system comprises a real-time airflow monitoring system, including, but not limited to, a pressure sensor (142), a switch (144), a microprocessor (151) and a feedback system configured to provide alerts including audio, visual or combination thereof;
wherein, all are arranged within the system and configured to detect clogging of the filtration module and to dynamically adjust airflow based on detected conditions.

11. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the illumination module (104) is attachable to a front portion of the head-mounted structure (130), the illumination module includes:
a light source (104a), positioned at an angle to direct illumination toward a surgical field; and
a positioning mechanism (104b), enabling brightness and angular adjustment of the light source (104a) relative to the head-mounted structure.

12. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the camera module (105) is releasably mounted on the illumination module (104) and is configured to capture high-definition video of surgical procedures using the camera (105a) for post-operative analysis, training, or insurance documentation, and includes a wireless data transmission interface comprising at least one of Bluetooth and Wi-Fi for transmitting video feeds to an external device.

13. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the camera module (105) includes a laser (105b) configured to project a visible beam indicating the region being captured by the camera (105a).

14. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the camera module (105) is operable in a first configuration comprising both the camera (105a) and a laser or laser-simulated indicator (105b), and in a second configuration comprising only the camera (105a) without the laser or laser-simulated indicator (105b).

15. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the louver attachment (106) is removably positioned at the front lower section of the head-mounted structure (130) and is configured to modify airflow direction, wherein airflow is redirected away from the user's face when the louver attachment (106) is attached, preventing dryness and discomfort.

16. The wearable respiratory personal protective system (100) as claimed in claim 7, wherein the head-mounted structure (130) has an interface for receiving modular attachments positioned on the upper surface (111) of the head-mounted structure (130) and is configured to allow plug-and-play placement of the modular attachments.

17. The wearable respiratory personal protective system (100) as claimed in claim 6, wherein the control system (150) is configured to adjust fan speed manually or automatically based on real-time pressure sensor readings arranged within the head-mounted structure (130).

18. The wearable respiratory personal protective system (100) as claimed in claim 1, comprises a power source (160) which is externally attached to the rear section of the head-mounted structure and configured to supply electrical energy to the system (100).

19. The wearable respiratory personal protective system (100) as claimed in claim 5, wherein the adjustable fitting mechanism (120) for wearing the wearable respiratory personal protective system on a user's head comprises a knob (122) to adjust circumference, a button (124) to adjust height, Bands (126), and a cushion attachment (128).

20. The wearable respiratory personal protective system (100) as claimed in claim 19, wherein the cushion attachment (128) is positioned between the two way adjustable band (110) and the head of the user, the cushion attachment (128) being slidable forward and backward to accommodate different head sizes, redistribute weight, and reduce pressure points.

21. The wearable respiratory personal protective system (100) as claimed in claim 1, wherein, when the system is utilized in conjunction with the hood (170) without a sealed enclosure, the system (100) operates as a standard operational protective system.

22. A method (200) of operating a wearable respiratory personal protective system, the method comprising the steps of:
receiving user input to determine whether at least one of a filtration module, an illumination module (104), camera module (105), and a louver attachment (106) are attached to a head-mounted structure (130);
adjusting airflow within the system (100) based on the user-selected settings, wherein if the filtration module is present, activating a powered air supply mechanism to direct filtered air toward the user’s breathing zone and if the louver attachment is present, adjusting the airflow direction to redirect air away from the user's face;
regulating illumination output based on user input, wherein if the illumination module (104) is attached, enabling angular and brightness adjustment of light source (104a) via a positioning mechanism (104b);
activating imaging functionality, wherein if the camera module (105) is attached, enabling images and video capture with camera (105a), wireless transmission of the video feed via Bluetooth or Wi-Fi, and projection of a laser light (105b) to mark the camera’s capture field on the surgical area;
monitoring airflow or pressure conditions using a pressure sensor, wherein detecting clogging of the filtration module (102) based on airflow resistance readings;
allowing manual or automated fan speed adjustment, wherein if the pressure sensor detects increased airflow resistance, increasing fan speed to maintain airflow, if airflow resistance is reduced, adjusting the fan speed accordingly;
providing an alert when the filtration module requires replacement, based on readings from the pressure sensor;
enabling user-controlled selection of different operating modes, wherein a ventilation mode is activated when no module is attached, a lighting mode is activated when the illumination module (104) is attached, a imaging mode is activated when the camera module (105) is attached, a PAPR mode is enabled when the filtration module (102) is attached to the rear top section, a hybrid mode is activated when both the filtration module (102) and illumination module (104) are attached, and an airflow redirection mode is activated when the louver attachment is installed; and
attaching a hood to a head-mounted structure, the splash-protective hood comprising a visor and a surrounding fabric drape, wherein the hood is selected based on the operating mode, the hood being:
a. without a seal in a standard operating mode; and
b. with a seal in the PAPR operating mode.

23. The wearable respiratory personal protective system (100) as claimed in claim 1, wherein the modular design of the system contributes to a reduction in overall weight, thereby rendering the system (100) lightweight and suitable for prolonged use.

24. The wearable respiratory personal protective system (100) as claimed in claim 1, wherein the head-mounted structure (130) is configured to support the modular components without requiring a chin bar or lower jaw support.