DESC:FIELD

The present disclosure relates generally cutting tools for precision applications in medical procedures. More particularly, the present disclosure pertains to a catheter cutting tool configured to enable accurate, consistent and efficient cutting of catheter tubing.

BACKGROUND

Catheters serve a wide array of critical functions in medical practice, making them indispensable tools in patient care. One of their primary uses is for infusing medications or nutrients directly into a patient's bloodstream, allowing for rapid therapeutic effects and precise dosing. This is particularly important in situations where oral administration is not feasible, such as in patients who are unconscious or unable to swallow. Additionally, catheters are employed to withdraw bodily fluids, such as blood or urine, for diagnostic testing or to relieve conditions like urinary retention. Furthermore, catheters are utilized to deliver various medical devices, such as stents or balloons, directly to a targeted treatment site within the body, facilitating minimally invasive procedures that can reduce recovery time and improve outcomes. Beyond these functions, catheters can also be used for drainage purposes, such as removing excess fluid from around organs or in cases of infection. Thus, in a medical setting, the catheters play an essential role in delivering treatments, monitoring health, and performing interventions in healthcare systems.

As such, many catheters are intended for immediate use by medical practitioners in their original manufactured state, without the need for modifications. However, certain catheters often require customization by the healthcare provider to meet the specific needs of the patient or the intended procedure. For example, peripherally inserted central catheters (PICCs) are commonly utilized in medical settings for long-term intravenous access. PICCs are long, thin catheters that are inserted into a vein in the arm and threaded through the body until the distal end reaches a large vein near the heart. Due to anatomical variations between patients, the length of the PICC required can differ significantly. To ensure the distal end is positioned optimally, a healthcare provider often need to cut the PICC to a precise length before insertion and optimal placement within a patient's body. This process typically involves trimming the distal end of the catheter with a scalpel, a razor or scissors to ensure that it can be positioned accurately at a specific anatomical location. While this method allows for customization, it frequently results in a blunt end that may harbor sharp edges, posing a risk of scraping and traumatizing the delicate internal tissues during insertion. Additionally, when a healthcare provider attempts to create a more atraumatic end manually, the resulting cuts can be non-uniform and uneven, as achieving a straight, clean cut can be challenging without specialized tools. The quality of the cut made with a scalpel can vary significantly between different users. A straight, clean cut is essential for ensuring that the catheter fits snugly within the vessel. An uneven or angled cut can cause turbulence in blood flow, increasing the risk of thrombosis or other vascular injuries. Such irregularities not only compromise the smoothness of the catheter's tip but can also leave a rough end surface. This roughness can increase the likelihood of complications, such as the accumulation of blood clots or bacterial growth, both of which can lead to serious infections or other adverse events. If the catheter is not cut correctly, it can lead to vessel trauma, which may result in serious complications such as bleeding, infection, or catheter malposition. These complications can necessitate further medical intervention, increasing the overall risk to the patient. The ability to customize the PICC length is crucial for maximizing the effectiveness of the catheter and minimizing complications, as an improperly positioned distal end could lead to issues such as irritation of the vein wall or poor drug delivery. Therefore, while trimming catheters is often necessary, it is crucial for healthcare providers to use appropriate techniques and tools to minimize potential risks associated with catheter cutting and insertion.

Accordingly, there is a need for a specialized catheter cutting device that can simplify and improve the catheter end cutting process for end-users. Such a device should allow the catheter to be trimmed ensuring a clean and uniform straight cut that is less likely to scrape or traumatize internal tissues during insertion. Additionally, the device should securely hold the catheter in the proper position during the cutting operation, ensuring a clean, uniform cut and preventing the catheter from slipping or moving unexpectedly. By providing a simple, effective, and safe solution for trimming catheter tips, healthcare providers can minimize the risks associated with this necessary procedure and ultimately improve the safety and efficacy of catheter-based interventions across various medical specialties which further helps healthcare professionals in enhancing the patient safety and improve the overall quality of care.

SUMMARY AND OBJECTS

Certain exemplary aspects of the present disclosure are set forth below to provide the reader with a brief overview of example forms the invention may take. These aspects are presented for illustrative purposes only and are not intended to limit the scope of the disclosure. The invention may encompass additional aspects, embodiments, and variations not expressly described herein. References to particular embodiments, examples, or variations are intended to exemplify devices, systems, and methods within the scope of the disclosure. Combinations of features from different embodiments or variations, whether expressly described or implicit, are also contemplated as being within the scope of the present disclosure.

The present disclosure relates to a catheter cutting tool configured to facilitate accurate, safe, and repeatable trimming of catheter tubing to a desired length in clinical settings. The tool generally comprises a lower housing having a front wall and a back wall spaced apart to define a gap, each wall being formed with one or more catheter receiving apertures. The apertures are coaxially aligned to support catheter tubing at two spaced apart points, maintaining axial alignment throughout the cutting operation and accommodating a range of French sizes.

An upper housing is mounted for guided vertical movement relative to the lower housing and carries a cutting blade oriented to pass through the gap to sever catheter tubing positioned in the apertures. Relative movement of the housings is controlled by an engagement between lugs on the lower housing and sliders on the upper housing. The sliders are provided with locking profiles that interact with the lugs to selectively retain the upper housing in a pre use open position, in a post use closed position, or both, depending on the embodiment.

In a single use embodiment, the lower housing includes a first pair of lugs and a second pair of lugs. After cutting, continued downward travel of the upper housing causes the locking profiles on the sliders to move below and engage the second lugs, establishing an irreversible lock that prevents reopening and ensures the cutting blade remains enclosed for safe disposal. This design promotes compliance with infection control protocols, eliminates the potential for reuse, and reduces sharps related risks.

In a multiple use embodiment, the lower housing is provided with only the first pair of lugs and does not incorporate the second pair or a post use locking arrangement. After each cut, the upper housing can be returned to the open position by pulling it upward, allowing the tool to be reset and reused. This configuration is particularly suited to high volume clinical environments where repeated catheter preparation is required. Materials and construction may be selected to withstand cleaning and sterilization cycles without performance degradation.

Further features that may be incorporated into either embodiment include tapered or chamfered lug profiles to reduce actuation force, interchangeable aperture inserts to adapt to different catheter sizes, guide rails or bushings to ensure precise blade alignment, and handle features positioned at the top of the upper housing to improve ergonomics. The device may also incorporate non slip bases, tamper evident elements, tactile or audible feedback mechanisms, or transparent housing portions for visual alignment. Through these configurations, the catheter cutting tool provides a safe, reliable, and efficient cutting mechanism that maintains catheter alignment, produces clean and consistent cuts, and can be adapted for either single use sterile disposal or controlled multiple use operation according to clinical needs.

In some examples, the catheter cutting tools incorporate one or more lugs and one or more slider(s) which ensure that the cutting tool remains in an open state prior to use, allowing for immediate readiness when the catheter needs to be cut. Such features eliminate the need for the medical practitioner to manually open the cutter before each use, streamlining the workflow and reducing the time spent preparing for catheter insertion for cutting purpose. In some situations, even after the tool is opened, it may inadvertently shift downward, partially or completely obstructing the hole intended for catheter insertion. This can occur due to various factors, such as the angle of insertion or the presence of other instruments in the medical setting. The lugs are designed to minimize this movement of the sliders, ensuring that the cutting hole remains unobstructed, and that the catheter can be inserted smoothly therethrough. By keeping the tool in an open position, healthcare providers can focus on the insertion process without the distraction of managing the cutter's position. This can be especially beneficial in high-pressure environments where efficiency and precision are paramount.

In some examples, the lugs are designed so that the force required to close the tool is less than that needed to reopen it after a cut has been made. This means that once the catheter tubing is cut, the tool can be easily closed without requiring excessive force. Such a mechanism not only enhances usability but also supports the catheter cutting tool being a single-use product. By ensuring that the tool is designed for one-time use, it reduces the risk of cross-contamination and infection that can occur with reusable instruments. The inability to easily reopen the cutter after closure discourages reuse, promoting better hygiene practices in medical settings.

It is an object of the present invention to provide a catheter cutting tool that enables accurate, clean, and repeatable cutting of catheter tubing while maintaining precise axial alignment of the tubing during the cutting operation.

It is a further object of the invention to provide a catheter cutting tool incorporating a retention mechanism configured to selectively maintain the upper housing in a pre use open position and/or a post use closed position according to the intended mode of use.

It is an additional object of the invention to provide a single use embodiment in which, after completion of the cutting action, the upper housing is irreversibly locked in the closed position to prevent reuse, facilitate safe disposal, and promote adherence to infection control protocols.

It is yet another object of the invention to provide a multiple use embodiment in which the upper housing can be repeatedly returned to the open position after each cutting operation, allowing the tool to be reset for subsequent use.

It is also an object of the invention to offer catheter cutting tools in which the components are formed from materials suitable for the intended lifecycle of the device, including single use sterile materials and, in reusable versions, materials capable of withstanding cleaning and sterilization cycles without degrading performance.

It is an object of the invention to enhance the operational ergonomics of the tool through features such as an integrated or attached handle, reduced actuation force via tapered or chamfered lugs, and grip enhancing surfaces.

It is an object of the invention to provide optional safety and usability enhancements including tamper evident or frangible locking features, tactile or audible lock engagement feedback, non slip bases, interchangeable catheter aperture inserts, and transparent portions for visual alignment.

It is still another object of the invention to provide a catheter cutting solution that can be configured for either high volume multiple use environments or single use sterile applications, thereby maximizing utility, safety, and cost effectiveness in differing clinical scenarios.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

The above and other objects, examples, features and advantages of the present disclosure will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which like reference numerals refer to like parts throughout, and wherein:

Figs. 1A, 1B, 1C, 1D, 1E, 1F & 1G illustrate a front, back, left side, right side, top side, bottom side and perspective view respectively of a catheter cutting tool according to some examples of the present disclosure;

Fig. 2 illustrates an exploded view of the catheter cutting tool of Fig. 1A;

Fig. 3 illustrates a cross-sectional side view of the catheter cutting tool of Fig. 1A;

Fig. 4 illustrates another exploded view of the catheter cutting tool of Fig. 1A;

Fig. 5 illustrates the locked position of the catheter cutting tool;

Figs. 6A, 6B, 6C, 6D, 6E, 6F & 6G illustrate a front, back, left side, right side, top side, bottom side and perspective view respectively of a catheter cutting tool according to some examples of the present disclosure;

Fig. 7 illustrates an exploded view of the catheter cutting tool of Fig. 6A.

DETAILED DESCRIPTION

Those skilled in the art will appreciate that the disclosed aspects and features of the present disclosure are not limited to any particular embodiment of catheter cutting tool for cutting a catheter tubing. It will be readily understood that the parts/components of the present disclosure, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Figs. 1A to 1G illustrate an example of a catheter cutter tool 10 configured for single-use and adapted to facilitate accurate and efficient cutting of catheter tubing (not shown). The tool 10 is constructed to provide consistent, clean, and substantially straight cuts across a range of catheter sizes, thereby reducing the likelihood of complications such as vessel trauma, catheter malposition, or other insertion related issues. The catheter cutting tool 10 is intended for use by healthcare professionals in various medical or clinical environments, including hospitals, outpatient centers, and surgical facilities. By enhancing the safety and effectiveness of catheter preparation procedures, the tool 10 enhances the safety and quality of catheter preparation, thereby contributing to improved patient care and operational efficiency in medical setting.

As shown in Figs. 1A to 1G and more particularly in Figs. 3 and 4, the catheter cutting tool 10 comprises an upper housing 12 and a lower housing 14, each incorporating structural and functional features that together enable safe, accurate, and efficient cutting of catheter tubing. The upper housing 12 includes a sharp cutting blade 16 that forms the primary cutting element of the tool 10. The blade 16 is securely mounted within the upper housing 12 in a predetermined orientation to ensure optimal engagement with the catheter tubing during the cutting operation, thereby producing a substantially straight and clean cut. In one embodiment, the cutting blade 16 is fabricated from a durable, medical grade material, such as medical grade stainless steel, selected for its corrosion resistance, biocompatibility, and ability to retain sharpness over multiple cutting operations. In alternative embodiments, the cutting blade 16 may be fabricated from other biocompatible metals, such as titanium or titanium alloys, which offer high strength to weight ratio and superior corrosion resistance; from hardened surgical grade alloys, such as cobalt chromium alloys, known for maintaining an ultra sharp edge; or from engineered ceramics, zirconia, or alumina, which provide extreme hardness, chemical inertness, and the ability to achieve a fine cutting edge. In further embodiments, the blade 16 may be disposable or replaceable, supported on a mount within the upper housing 12 that allows for quick substitution without risk of injury to the operator. The blade edge may be straight, curved, angled, serrated, or micro serrated, depending on the intended application and the type of catheter tubing to be cut. The upper housing?may further comprise at least one internal guide channel configured to direct the cutting blade?16 along a predetermined vertical path. The housings?12,?14 are moulded from a medical grade thermoplastic selected from the group consisting of polycarbonate (PC), polypropylene (PP).

The configuration of the upper housing 12 also serves to enclose and shield the blade 16 when the tool is not in operation, thereby reducing the risk of accidental contact and injury to healthcare personnel. By integrating blade positioning, housing design, and safety shielding within a single component, the upper housing 12 enhances both the functional performance and operational safety of the catheter cutting tool 10.

As illustrated in Figs.?2 and 4, the cutting blade?16 includes at least two mounting apertures?30 configured to facilitate secure attachment of the cutting blade?16 to the upper housing?12. The upper housing?12 is provided with at least two corresponding engagement projections?32, dimensioned and positioned to align with the mounting apertures?30 of the blade?16. During assembly, the apertures?30 of the cutting blade?16 are positioned over the projections?32 of the upper housing?12, thereby establishing precise blade alignment relative to the catheter cutting interface. Once aligned, the blade?16 is affixed to the upper housing?12 using an adhesive, bonding agent, or other suitable securing technique, such as ultrasonic welding, mechanical crimping, or fasteners, depending on the embodiment.

Such attachment arrangement provides a stable, non movable connection between the cutting blade?16 and the upper housing?12, ensuring the blade maintains its predetermined orientation under operational forces encountered during catheter cutting. By preventing blade displacement or loosening, the arrangement preserves cutting accuracy, maintains consistent tip geometry, and reduces the risk of incomplete cuts or user injury. In some embodiments, the projections?32 may include features such as undercuts, barbs, or textured surfaces to enhance mechanical interlock with the apertures?30, further improving retention strength without compromising assembly simplicity.

As illustrated in Figs.?2 and 4, the projections?32 formed on the upper housing?12 are dimensioned with predetermined length, width, and height parameters selected to achieve a desired interaction with the front wall?18 of the lower housing?14. In certain embodiments, these dimensions are configured to provide a controlled interference and/or clearance relationship with the front wall?18 so as to guide and stabilize the cutting blade?16 during operation. The interference fit portion of this arrangement serves to securely retain the cutting blade?16 in a fixed lateral position, thereby minimizing any undesired side to side movement during the cutting procedure. At the same time, the clearance portions are sized to permit the limited, intended range of motion necessary for the blade to perform an efficient and accurate cutting action.

By combining these dimensional features, the projections?32 establish a stable support base against the front wall?18, maintaining the cutting blade?16 in a precisely oriented position throughout the cutting stroke. Such stability prevents blade tilting or wobbling, conditions which could otherwise impair cut quality, deform the catheter tubing, or compromise procedural safety. In some embodiments, the projections?32 may incorporate chamfered edges, tapered surfaces, or low friction coatings to further facilitate smooth interaction with the front wall?18, reduce wear, and enhance operational life. In alternative embodiments, the projections?32 and/or the opposing contact region on the front wall?18 may be formed from resilient or elastomeric materials to absorb operational vibrations while maintaining positional stability of the cutting blade?16. Such configuration of the projections?32 therefore ensures that the cutting blade?16 remains steady and aligned throughout use, enabling consistent, precise cuts and reducing the likelihood of catheter damage or procedural error.

As illustrated in Figs.?2 and 4, the cutting blade?16 is provided with at least two mounting apertures?30 positioned at predetermined distances from one another to define a gap between adjacent apertures. In certain embodiments, the location and spacing of the apertures?30 are selected to optimize both the structural integrity and the operational performance of the cutting blade?16. The distribution of these apertures?30 across the blade body allows cutting forces to be transferred more evenly, thereby reducing localized stress concentrations that might otherwise contribute to material fatigue, deformation, or premature failure. The defined gap between the apertures?30 further facilitates accurate positional alignment of the cutting blade?16 with the corresponding engagement projections?32 formed on the upper housing?12. Such alignment ensures that, once assembled, the blade?16 remains in a precise operative position relative to the catheter cutting interface, thereby enhancing assembly stability and maintaining consistent cutting geometry.

In various embodiments, the inter aperture distance and configuration may be tailored to factors such as the intended application of the tool, the blade material properties, and the desired cutting characteristics. For example, shorter spacing may increase blade rigidity, whereas increased spacing may reduce weight or improve balance. The apertures?30 may be circular, elongated, or of another profile configured to cooperate with the projections?32 for either an interference fit, clearance fit, or a combination thereof.

It is to be understood that although the embodiment shown in Figs.?2 and 4 illustrates two mounting apertures?30 on the cutting blade?16 cooperating with two corresponding engagement projections?32 on the upper housing?12, the number of apertures?30 and projections?32 is not limited to this arrangement. In certain embodiments, additional or fewer attachment points may be provided, with their number, shape, and placement selected according to the specific design requirements of the cutting blade?16 and the upper housing?12. Providing multiple attachment points can facilitate more uniform distribution of operational loads along the length of the blade?16, thereby reducing localized stress concentrations and improving structural durability. The number and spacing of the apertures?30 and projections?32 may be optimized based on factors including, but not limited to, the size and geometry of the cutting blade?16, the dimensions and contour of the upper housing?12, the anticipated cutting forces, and the manufacturing or assembly methods utilized.

In some embodiments, the projections?32 and apertures?30 may have complementary circular, oval, polygonal, or keyed profiles to improve anti rotation stability. In further embodiments, the attachment interface may be augmented by adhesives, ultrasonic welding, mechanical fasteners, or snap fit features in addition to the projection/aperture engagement, thereby ensuring a robust and reliable connection. Regardless of the specific configuration, the attachment arrangement is configured to maintain precise alignment of the cutting blade?16 with the catheter cutting path, resist displacement under repeated use, and thereby ensure safe, consistent, and effective operation of the catheter cutting tool?10.

As illustrated in Figs.?2 and 4, the catheter cutting tool?10 further comprises a lower housing?14 that serves as a structural base and support platform for the cutting mechanism. The lower housing?14 includes a front wall?18 and an opposite back wall?20, the two walls being spaced apart to define a gap?22 therebetween. Said gap?22 is dimensioned to receive and guide a portion of the catheter tubing during the cutting operation, as described in greater detail in subsequent sections of this disclosure.

In the depicted embodiment, each of the front wall?18 and back wall?20 is formed with one or more catheter receiving apertures?24. These apertures?24 are precisely dimensioned to correspond to predetermined catheter outer diameters expressed in French (Fr) sizes. Suitable sizes may include, but are not limited to, 2?Fr, 3?Fr, 4?Fr, 5?Fr, 6?Fr, and 8?Fr. The exact dimensions of each aperture?24 are selected to provide a snug, supportive fit for the intended catheter size. Such controlled fit securely positions the catheter tubing in axial alignment with the cutting blade?16, thereby minimizing movement, bending, or slippage during cutting and reducing the likelihood of improper, angled, or incomplete cuts. The catheter receiving aperture(s)?24 are dimensioned with a tolerance, not being limited to, between 0.01?mm and 0.5?mm greater than the outer diameter of the corresponding catheter size.

As illustrated in Figs.?2 and 4, the catheter cutting tool?10 further comprises a lower housing?14 that serves as a structural base and support platform for the cutting mechanism. The lower housing?14 includes a front wall?18 and an opposite back wall?20, the two walls being spaced apart to define a gap?22 therebetween. The gap?22 is dimensioned to receive and guide a portion of the catheter tubing during the cutting operation, as described in greater detail in subsequent sections of this disclosure.

In the depicted embodiment, each of the front wall?18 and back wall?20 is formed with one or more catheter receiving apertures?24. These apertures?24 are precisely dimensioned to correspond to predetermined catheter outer diameters expressed in French (Fr) sizes. Suitable sizes may include, but are not limited to, 2?Fr, 3?Fr, 4?Fr, 5?Fr, 6?Fr, and 8?Fr. The exact dimensions of each aperture?24 are selected to provide a snug, supportive fit for the intended catheter size. Such controlled fit securely positions the catheter tubing in axial alignment with the cutting blade?16, thereby minimizing movement, bending, or slippage during cutting and reducing the likelihood of improper, angled, or incomplete cuts. In some embodiments, the upper housing?12 is transparent or translucent in at least a portion adjacent the blade?16 to permit visual alignment of the catheter tubing before cutting.

The provision of apertures?24 for multiple French sizes on both the front wall?18 and back wall?20 enables the catheter cutting tool?10 to accommodate a broad spectrum of catheter tubing types encountered in clinical practice. In some embodiments, the apertures?24 on the front and back walls?18,?20 are coaxially aligned so that the tubing is supported along two spaced contact points, further enhancing straightness and positional stability during cutting. In alternative embodiments, the holes may be tapered, chamfered, or lined with a low friction or elastomeric material to ease catheter insertion while protecting the outer surface of the tubing from damage.

In further embodiments, the apertures?24 may be formed as part of interchangeable inserts or removable plates mounted to the front and back walls, thereby allowing the device to be quickly adapted for different catheter size ranges or replaced if worn. In further embodiments, the aperture size or profile may be defined by interchangeable inserts or bushings, enabling the same lower housing?14 to be adapted to different catheter ranges or replaced if worn. The number, arrangement, and shape of the apertures?24 may be varied depending on intended application, expected catheter dimensions, and manufacturing considerations. Regardless of the particular configuration, the arrangement of the front wall?18, back wall?20, gap?22, and apertures?24 is configured to ensure proper catheter seating, precise axial alignment with the cutting mechanism, and safe, repeatable cutting performance across multiple catheter sizes.

During use, when a catheter tubing is to be prepared for cutting using the catheter cutting tool?10 of the present disclosure, a healthcare professional selects a catheter receiving aperture?24 provided in the front wall?18 of the lower housing?14 that corresponds to the French size of the catheter tubing to be cut. Each aperture?24 is dimensioned in accordance with predetermined outer diameter specifications for standard catheter sizes, such as 2?Fr, 3?Fr, 4?Fr, 5?Fr, 6?Fr, or 8?Fr, so as to provide a tailored receiving interface for the selected catheter.

Once the appropriate aperture?24 is selected, the catheter tubing is inserted through the front wall?18 and guided axially through the corresponding, coaxially aligned aperture?24 formed in the back wall?20 of the lower housing?14. In this arrangement, the front wall?18 provides initial alignment and stabilization at the point of entry, while the back wall?20 delivers secondary guidance and support as the tubing passes through the cutting zone. Because the catheter is supported at two longitudinally spaced locations, the tubing is maintained in a substantially straight orientation and is restrained against bending or lateral deflection during the cutting operation.

The precise dimensioning of the apertures?24 is configured to achieve a controlled fit with the catheter tubing tight enough to prevent unwanted movement or slippage during cutting, yet not so restrictive as to damage the catheter surface or impede insertion and removal. By engaging and supporting the catheter tubing at both the front wall?18 and back wall?20, such a dual wall arrangement creates a stable, well aligned cutting path for the cutting blade?16. Such stability enhances cutting precision, resulting in a clean, uniform, and perpendicular cut surface that reduces the likelihood of uneven edges, deformation, or tissue trauma risk upon catheter insertion into the patient.

As illustrated in Fig.?3, the gap?22 defined between the front wall?18 and the back wall?20 of the lower housing?14 is dimensioned and configured to receive a portion of the upper housing?12 of the catheter cutting tool?10. The upper housing?12 operatively supports the cutting blade?16, which is mounted within the housing in a predetermined orientation to ensure precise alignment with the catheter receiving apertures?24 of the front and back walls?18,?20. This alignment is maintained during the cutting operation to deliver a clean and uniform cut.

In the depicted embodiment, the upper housing?12 is mounted for reciprocating vertical movement relative to the stationary lower housing?14. Upon activation, the upper housing?12 travels downward in a controlled manner, causing the cutting blade?16 to descend through the gap?22 and move into the cutting zone between the front and back walls. As the blade?16 passes through this gap, it engages and severs the catheter tubing extending beyond the back wall?20. The path of travel is predetermined and guided so that the blade edge remains in accurate register with the catheter’s longitudinal axis, preventing deviation or angular misalignment.

The interaction of the gap?22 with the guided vertical motion of the upper housing?12 ensures that the cutting operation is smooth, stable, and predictable. The dimensions of the gap?22 are selected to provide adequate clearance for the cutting blade?16 while simultaneously restricting any undesirable lateral movement, thereby maintaining blade position relative to the catheter tubing during the cutting stroke. By controlling blade path and maintaining catheter stability, such arrangement produces a cut that is substantially perpendicular to the catheter’s longitudinal axis, minimizing burrs, fraying, or irregularities that could adversely affect catheter performance.

In some embodiments, the vertical movement of the upper housing?12 may be biased or assisted by a spring or lever mechanism to enhance cutting efficiency and reduce operator effort. In further embodiments, guide rails, bushings, or low friction interfaces may be provided between the upper housing?12 and lower housing?14 to ensure smooth linear travel and minimize wear over repeated use. Regardless of the actuation method, the design of the gap?22 in combination with the guided motion of the upper housing?12 contributes to accurate and efficient catheter trimming, thereby reducing the risk of procedural complications and improving overall user safety.

Referring to Figs.?2 and 4, the catheter cutting tool?10 includes one or more lugs?26 and one or more sliders?34 configured and positioned to perform two primary functions i.e. to maintain the upper housing?12 in an open position relative to the lower housing?14 prior to use, and to securely lock the upper housing?12 to the lower housing?14 after the catheter cutting procedure has been completed. In the depicted embodiment, the front wall?18 and back wall?20 of the lower housing?14 each carry at least two pairs of lugs?26 located on opposite lateral sides of the housing. For clarity, these are identified as a first pair of lugs?26a and a second pair of lugs?26b. Each lug?26 defines an inner side wall?36a and an outer side wall?36b. The inner side wall?36a is formed with a tapered profile configured to facilitate guided engagement with the corresponding slider?34 during movement of the upper housing?12.

The upper housing?12 is provided with at least two sliders?34, each disposed on opposing lateral sides of the housing so as to correspond with the lug arrangement of the lower housing?14. The pairs of lugs?26 on each side are positioned in opposed relation, defining a clearance path therebetween sized to receive and permit travel of the associated slider?34. Such arrangement allows each slider?34 to translate upwardly and downwardly along the defined path while being laterally retained by the facing lugs?26.

At the proximal end of each slider?34 is an integral locking profile?38. When the cutting procedure is complete and the upper housing?12 is fully depressed toward the lower housing?14, the locking profile?38 engages beneath a corresponding lug?26, thereby mechanically locking the upper housing?12 in a closed position. Such engagement prevents subsequent access to the cutting blade?16 and protects the user from accidental contact post use. Conversely, when the device is new and in the open position, the locking profile?38 is arranged to abut against the first pair of lugs?26a, thereby acting as a stopper that supports and holds the upper housing?12 in a raised position. Such “pre use” latch makes catheter insertion and alignment easier by keeping the cutting zone accessible.

In some embodiments, the locking profile?38 and/or the lugs?26 may incorporate chamfers, bevels, or curved lead in surfaces to reduce insertion force during engagement. In other embodiments, the sliders?34 may be biased by springs or formed of elastically deflectable material to enable snap fit engagement and disengagement with the lugs?26. The number, shape, and positioning of the lugs?26 and sliders?34 may be varied to suit different tool sizes, housing materials, or manufacturing processes. Regardless of the specific geometry, the cooperative arrangement of the lugs?26, sliders?34, and locking profiles?38 is configured to provide repeatable, secure retention of the housings in both their open and closed states, thereby enhancing safety, ease of use, and device reliability.

As illustrated in Figs.?2 and 4, during assembly of the catheter cutting tool?10, the upper housing?12 is positioned and urged downward so as to pass over, or “snap” past, the lugs?26 formed on the lower housing?14. The geometry of the lugs?26 is configured to allow this over travel during assembly while thereafter establishing a mechanical interlock that resists separation of the housings during use. Once engaged, the lug profile cooperates with corresponding surfaces on the upper housing?12 to retain the housings in assembled condition, even under operational forces encountered during catheter cutting.

Such mechanical interlock arrangement prevents both inadvertent and intentional disengagement during clinical procedures, thereby helping maintain device integrity in the hands of medical personnel. The profile of the lugs?26 is further configured to hold the upper housing?12 in its intended positional relationship with the lower housing?14 throughout the cutting operation, ensuring consistent blade alignment and safe operation under varying user applied pressures or movements. Regardless of the specific configuration, the cooperative engagement between the lugs?26 and the upper housing?12 is configured to maintain assembly integrity, operational stability, and user safety throughout the lifecycle of the tool.

As illustrated in Figs.?1C and 1D, the lugs?26 are configured to cooperate with the sliders?34 and their associated locking profiles?38 to mechanically retain the upper housing?12 of the catheter cutting tool?10 in an elevated, open position prior to use. In this position, the cutting zone and catheter receiving apertures?24 are fully accessible, allowing immediate catheter insertion and alignment without the need for the operator to manually hold or open the housing. When the upper housing?12 is drawn upward into its ready position, each slider?34 moves correspondingly in the upward direction, positioning its locking profile?38 between the first pair of lugs?26a and the second pair of lugs?26b on the lower housing?14. Such interposed relationship provides a positive stop that supports the upper housing?12 in the open state until deliberate actuation is applied.

By holding the cutting tool?10 in a constant ready for use condition, this arrangement minimizes preparation time, reduces handling steps, and decreases the likelihood of user error associated with manually separating the housings before every operation. The pre use retention mechanism also ensures that the upper housing?12 maintains stable alignment relative to the lower housing?14 prior to cutting, further promoting accuracy and safety during catheter processing.

As illustrated in Fig.?5, the lugs?26 and sliders?34 of the catheter cutting tool?10 incorporate an integral locking feature configured to secure the upper housing?12 to the lower housing?14 after completion of a catheter cutting operation. Following the cutting procedure, continued downward displacement of the upper housing?12 whether by manual pressure, spring bias, or other means drives each slider?34 and its corresponding locking profile?38 downward along the tapered inner side walls?36a of the first?26a and second?26b pairs of lugs. The tapered geometry of the inner side walls?36a guides the locking profiles?38 smoothly past the contact edges of the lugs?26 without binding, facilitating reliable transition into the locked state. As the upper housing?12 reaches its terminal downward position, each locking profile?38 moves beyond the second pair of lugs?26b. In this position, upward motion of the sliders?34 is mechanically obstructed by the engagement surfaces of the second pair of lugs?26b, thereby establishing a positive lock between the upper housing?12 and the lower housing?14. Such engagement prevents separation of the housings during handling, storage, or disposal.

The locking mechanism thus ensures that after use, the cutting blade?16 remains enclosed within the housings, preventing accidental contact and reducing sharps related risks. In some embodiments, the lugs?26 and/or locking profiles?38 may include chamfered or radiused edges to reduce the locking force required, or may be formed from resilient materials to permit controlled elastic deflection during engagement. In other embodiments, audible or tactile feedback may be provided when the lock is engaged, confirming to the user that the device is secured. The post use locking arrangement is configured to maintain the cutting tool 10 in a closed and tamper resistant state, thereby enhancing safety during handling, transport, and disposal, and ensuring that the device cannot be inadvertently re opened or reused. The tool 10 may comprise tamper evident or frangible features configured to indicate any attempt to reopen the tool?(10) after use.

In operation, once the upper housing?12 is fully depressed and the cutting blade?16 has severed the catheter tubing, the locking mechanism formed by the interaction of the lugs?26, sliders?34, and locking profiles?38 transitions into an engaged position in which the upper housing?12 is mechanically secured to the lower housing?14. In this locked state, the housings cannot be separated without destruction or permanent damage to the device, thereby rendering the catheter cutting tool?10 irreversibly closed. Such arrangement ensures that the tool?10 is suitable exclusively for single use applications, eliminating the possibility of reuse. By preventing reopening after a cutting operation, the locking mechanism supports strict adherence to infection control protocols and reduces the risk of cross contamination between patients. The inability to access the blade?16 post use also protects healthcare personnel from sharps injury during handling, transport, or disposal. The single use, self locking design not only enhances patient and operator safety but also simplifies clinical workflow by removing the need for cleaning or sterilization procedures associated with reusable instruments, thereby saving time and resources in busy medical environments.

As depicted in Figs.?6A to?6G and Fig.?7, an alternative embodiment of the catheter cutting tool?10 is shown, configured to facilitate accurate and efficient cutting of catheter tubing (not shown) while being suitable for multiple use applications. This embodiment incorporates the principal structural components of the earlier example illustrated in Figs.?1A–1G, including the upper housing?12, lower housing?14, and cutting blade?16.

In contrast to the first embodiment, the present version includes only a first pair of lugs?26a, positioned as shown in Figs.?6C, 6G, and?7, and omits the second pair of lugs?26b and the associated post use locking arrangement. The lugs?26a in the depicted embodiment are formed without any tapered inner profile; however, in some embodiments, the lugs?26a may incorporate a tapered or chamfered profile similar to that described in the first embodiment to facilitate guided interaction with sliding components or to assist in controlled housing movement. With the reduced lug arrangement, the cutting blade?16 remains securely mounted within the upper housing?12 and is guided to move downward, through the cutting zone, to sever the catheter tubing in a controlled manner. However, the absence of the second pair of lugs?26b and a locking mechanism allows the upper housing?12 to be readily returned to its open position by pulling it upward relative to the lower housing?14 once a cutting operation is completed. This depicted configuration enables the tool?10 to be re used for subsequent catheter cutting procedures without the need to replace the device after each use.

In some embodiments configured for multiple use, the materials of the upper housing?12, lower housing?14, and blade?16 may be selected to withstand repeated cleaning or sterilization cycles, such as autoclaving or chemical disinfection, without degradation of performance.

As illustrated in Fig.?7 and Figs.?6C and?6G, this embodiment of the catheter cutting tool?10 includes only a first pair of lugs?26a and omits both the second pair of lugs?26b and the associated post use locking arrangement described in the single use embodiment. In the absence of a locking mechanism, the upper housing?12, after completing a cutting stroke and severing the catheter tubing, can be manually returned to its raised, open position simply by pulling it upward relative to the lower housing?14. The depicted configuration allows the device to be reset immediately for a subsequent cutting operation without destruction or disassembly, enabling continuous cycles of catheter preparation. The simplified lug arrangement supports smooth upward and downward motion of the upper housing?12, allowing healthcare providers to transition quickly between cuts. By facilitating repeated operation, this multiple use version of the catheter cutting tool?10 provides a practical and cost effective solution for settings where catheter trimming procedures are performed frequently, such as high volume hospital wards, catheterization labs, or outpatient procedure rooms.

As illustrated in Fig.?7 and further in Fig.?3, the upper housing?12 of the catheter cutting tool?10 is provided with a handle feature?28 positioned at its uppermost portion. The handle?28 is configured to serve as a dedicated grip point, enabling the operator to apply a controlled upward force to reposition the upper housing?12 relative to the lower housing?14. Its location at the top extremity is selected to maximize leverage and provide clear accessibility during tool manipulation. In use, the healthcare provider may grasp the handle?28 with one hand while stabilizing the lower housing?14 with the other. When the device is to be reset for reuse following a completed cutting stroke, the handle?28 is pulled upward in a controlled manner, returning the upper housing?12 to its raised, open position. This motion re exposes and aligns the catheter receiving apertures?24 in the lower housing?14, readying the tool for insertion of a fresh section of catheter tubing for the next cut.

In some embodiments, the handle?28 may be integrally moulded with the upper housing?12, while in other embodiments it may be a separately manufactured component fastened or over moulded onto the housing. The grip portion may have a variety of ergonomically contoured shapes, such as a curved ridge, loop, recessed finger well, or textured surface, to enhance comfort and prevent slippage during operation. The handle?28 may also be formed from or coated with an elastomeric or high friction material to improve tactile control, particularly when the user is wearing gloves.

As used herein, the terms “proximal,” “bottom,” “down,” or “lower” refer to a portion or location of the device that, in its normal operating orientation, is closest to the medical practitioner and farthest from the patient. Conversely, the terms “distal,” “top,” “up,” or “upper” refer to a portion or location of the device that, in its normal operating orientation, is farthest from the medical practitioner and closest to the patient. For example, in relation to a needle, the distal region may be the region containing the needle tip intended for insertion into the patient (e.g., into a vein). In the context of the present catheter cutting tool, the terms “proximal” and “distal” are applied analogously to indicate relative positioning of components with respect to the operator and the patient.

The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting of the present disclosure. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” include the plural forms. As used herein, the term “and/or” refers to any one of the listed items, any combination of two or more of the listed items, or all of the listed items.

It will be understood that, as used herein, the terms “comprises,” “comprising,” “includes,” and/or “including” indicate the presence of the stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof, unless expressly stated otherwise. Unless expressly defined herein, all terms (including technical and scientific terms) are to be given their meaning as commonly understood by one of ordinary skill in the art relevant to this disclosure, and are to be interpreted in a manner consistent with their usage in this specification and in the relevant art, without being limited to an idealized or overly formal sense.

As used herein, the terms “coupled,” “connected,” and “fitted” refer to a relationship between two or more elements in which the elements are joined or associated, either directly or indirectly, and not necessarily mechanically, unless expressly stated otherwise.

References herein to “some embodiments,” “one embodiment,” “certain embodiments,” “an embodiment,” “some examples,” “one example,” or similar terms indicate that a particular feature, structure, or characteristic described in connection therewith is included in at least one embodiment of the present disclosure. The appearances of such terms in various places in this disclosure are not necessarily all referring to the same embodiment. Unless otherwise indicated, individual features, structures, or characteristics described in connection with separate embodiments may be combined in any suitable manner in one or more embodiments without limitation.

While aspects of the present disclosure have been described in detail with reference to certain illustrated embodiments and/or examples, it will be understood by those skilled in the art that various modifications, substitutions, and variations are possible without departing from the scope of the present disclosure. The disclosure is not limited to the precise constructions, arrangements, or compositions described herein, and expressly encompasses all combinations and sub combinations of the features and elements previously described, whether expressly claimed or not. The description is provided for purposes of clarity and illustration only and should not be construed as limiting. Terms used herein are to be accorded their ordinary and customary meaning in the relevant art unless expressly defined otherwise.

The foregoing summary and description are illustrative, not restrictive. Additional aspects, embodiments, and features will become apparent to those skilled in the art upon consideration of the appended claims.
,CLAIMS:1. A catheter cutting tool?(10) comprising:
a lower housing?(14) having a front wall?(18) and a back wall?(20) defining a gap?(22) therebetween, each wall including at least one catheter receiving aperture?(24) configured to align with a corresponding aperture in the other wall;
an upper housing?(12) mounted for guided movement relative to the lower housing?(14) between an open position and a closed position;
a cutting blade?(16) operatively supported in the upper housing?(12) and oriented to pass through the gap?(22) between the front wall?(18) and the back wall?(20) to sever catheter tubing positioned in the aligned catheter receiving apertures?(24); and
at least one retention feature?(26,?26a,?26b) positioned on the lower housing?(14) and configured to engage a corresponding slider element?(34) on the upper housing?(12) to selectively maintain the tool?(10) in at least one of:
(i) an open position prior to use; and
(ii) a closed position after use,
wherein the retention feature?(26,?26a,?26b) and the slider element?(34) are shaped and positioned to guide relative movement of the housings?(12,?14) and to maintain alignment of the cutting blade?(16) with the catheter tubing during operation.

2. The catheter cutting tool?(10) as claimed in claim 1, wherein the retention feature comprises a first pair of lugs?(26a) disposed on opposing sides of the lower housing?(14), each lug?(26a) defining an inner side wall?(36a) and an outer side wall?(36b).

3. The catheter cutting tool?(10) as claimed in claim 2, wherein the inner side wall?(36a) has a tapered profile configured to facilitate movement of a locking profile?(38) of the slider element?(34) past the lug?(26a) during engagement.

4. The catheter cutting tool?(10) as claimed in claim 1, wherein the retention feature further comprises a second pair of lugs?(26b) positioned below the first pair of lugs?(26a) to form a post use locking arrangement preventing separation of the upper housing?(12) from the lower housing?(14) after the cutting operation.

5. The catheter cutting tool?(10) as claimed in claim 4, wherein the upper housing?(12) is irreversibly locked to the lower housing?(14) in the closed position after the cutting operation, rendering the tool?(10) suitable for single use applications.

6. The catheter cutting tool?(10) as claimed in claim 5, further comprising tamper evident or frangible features configured to indicate any attempt to reopen the tool?(10) after use.

7. The catheter cutting tool?(10) as claimed in claim 1, wherein the upper housing?(12), lower housing?(14), and cutting blade?(16) are formed from materials resistant to repeated cleaning or sterilization.

8. The catheter cutting tool?(10) as claimed in claim 1, wherein the front wall?(18) and back wall?(20) are configured to coaxially support the catheter tubing at two spaced apart locations to maintain axial alignment during cutting.

9. The catheter cutting tool?(10) as claimed in claim 9, wherein the catheter receiving apertures?(24) are dimensioned to accommodate a range of catheter French sizes and optionally shaped to include tapered, chamfered, or elastomeric lining portions.

10. The catheter cutting tool?(10) as claimed in claim 1, wherein the upper housing?(12) comprises a handle feature?(28) positioned at its uppermost portion for grasping by a user to facilitate movement of the upper housing?(12) between the open and closed positions.

11. The catheter cutting tool?(10) as claimed in claim claim 10, wherein the handle feature?(28) is integrally formed with the upper housing?(12) or attached thereto, and comprises a loop, ridge, recess, or textured surface to improve grip.

12. The catheter cutting tool?(10) as claimed in claim 1, wherein the slider element?(34) includes a locking profile?(38) configured to engage the first lugs?(26a) in a raised position to maintain the upper housing?(12) open prior to use.

13. The catheter cutting tool?(10) as claimed in claim 1, further comprising guiding means between the upper housing?(12) and the lower housing?(14) to control linear movement, the guiding means comprising guide rails, bushings, or low friction surfaces.

14. The catheter cutting tool?(10) as claimed in claim?1, wherein the gap?(22) between the front wall?(18) and the back wall?(20) is dimensioned to provide lateral clearance not exceeding a predetermined value to maintain blade path stability.

15. The catheter cutting tool?(10) as claimed in claim?1, wherein the cutting blade?(16) is fixedly mounted within the upper housing?(12) in a perpendicular orientation to the longitudinal axis of the catheter tubing.

16. The catheter cutting tool?(10) as claimed in claim?25, wherein the cutting blade?(16) has a straight cutting edge, angled cutting edge, curved edge, or serrated edge or micro-serrated edge configured to produce a clean cut without fraying.

17. The catheter cutting tool?(10) as claimed in claim?1, wherein the catheter receiving aperture(s)?(24) are dimensioned with a tolerance between 0.01?mm and 0.5?mm greater than the outer diameter of the corresponding catheter size.

18. The catheter cutting tool?(10) as claimed in claim?1, wherein the upper housing?(12) further comprises at least one internal guide channel configured to direct the cutting blade?(16) along a predetermined vertical path.