Claims:WE CLAIM:
1. A medical device (100) comprising:
a syringe barrel (102) having a side wall with an inside surface defining a chamber (204) for retaining at least one of a fluid and a vacuum, an open proximal end comprising finger flanges (104) and a distal end comprising a distal wall having at least one of a passageway (106) therethrough in fluid communication with the chamber (204) and an open passageway (106) therethrough in vacuum communication with the chamber (204), each of the finger flanges (104) comprises a semi-circular opening slot (124);
an elongated plunger rods (108) disposed within two sides of the chamber (204) of syringe barrel (102) comprising a distal portion and a proximal portion, or a plunger rod body (110) coupled to elongated plunger rods (108) and extending from the distal portion to the proximal portion, the elongated plunger rods (108) comprises a pair of diagonally opposite internal arms (304) disposed from the proximal portion to the distal portion, the proximal portion comprises a cylindrical ring (302) or a finger grip (122), and a stopper (114) disposed at the distal portion of the elongated plunger rods (108) for forming at least one of a fluid-tight seal and a vacuum-tight seal with the inside surface of the chamber (204) of the syringe barrel (102);
at least two locking element (116) pressably mounted to the finger flanges (104) or the syringe barrel (102), and disposed within the semi-circular opening slot (124) of each finger flange (104), the at least two locking elements (116) comprises a slip tip (206); and
a pre-load locking arm (118) comprising a pair of cylindrical plates (306) at a distal portion, a spherical grip flange (120) at a proximal portion, and a plurality of inner grooves (112) on supporting arms (310) of the pre-load locking arm (118), or an open end pre-load locking arm (118) comprises a spherical grip flange (120) at a proximal portion and a plurality of inner grooves (112) on supporting arms (310) of the open end pre-load locking arm (118), the cylindrical plates of the pre-load locking arm (118) comprises a pair of diagonally opposite opening slots (308) for accommodating the diagonally opposite internal arms (304) of the elongated plunger rods (108), the pair of cylindrical plates (306) of the pre-load locking arm (118) is slidably mounted onto the diagonally opposite internal arms (304) via the cylindrical ring (302) of the elongated plunger rods (108), the open end pre-load locking arm (118) is slidably mounted on an external surface of the syringe barrel (102) via the semi-circular opening slot (124) of each finger flange (104), and the slip tip (206) of the at least two locking elements (116) is in contact with the plurality of grooves (112) of the pre-load locking arm (118) or the open end pre-load locking arm (118);
wherein the pre-load locking arm (118) or the open end pre-load locking arm (118) is adjusted to a required length for impelling varying amount of at least one of the fluid and the vacuum, by applying a proximally force on the spherical grip flange (120) of the pre-load locking arm (118) or the open end pre-load locking arm (118), when a proximal force on the finger grip (122) or the cylindrical ring (302) of the elongated plunger rods (108) and simultaneous distal force on the spherical grip flange (120) is applied, the elongated plunger rods (108) is proximally moved until the length of the adjusted pre-load locking arm (118) or the open end pre-load locking arm (118), the at least one of fluid and vacuum is impelled into the chamber (204) of the syringe barrel (102) to the amount corresponding to the adjusted pre-load locking arm (118) or the open end pre-load locking arm (118).

2. The medical device (100) as claimed in claim 1, wherein the pre-load locking arm (118) or the open end pre-load locking arm (118) is slidably mounted respectively to the elongated plunger rods (108) or on the external surface of the syringe barrel (102), such that overall length of the pre-load locking arm (118) or the open end pre-load locking arm (118) is adjustable while proximally sliding the pre-load locking arm (118) or the open end pre-load locking arm (118), to a plurality of different locked lengths to each of inner grooves (112), thereby permitting varying amounts of at least one of the fluid and vacuum to be impelled in chamber (204) of the syringe barrel (102) corresponding to the plurality of locked lengths, upon subsequently applying proximal force on the elongated plunger rods (108) via the cylindrical ring (302) or the finger grip (122), wherein, when distally sliding the pre-load locking arm (118) or the open end pre-load locking arm (118), and simultaneously pressing the at least two locking element (116), the pre-load locking arm (118) or the open end pre-load locking arm (118), drives the elongated plunger rods to expel at least one of the fluid and vacuum.

3. The medical device (100) as claimed in claim 1, wherein the elongated plunger rods (108) are moving over the internal surface of chamber (204) of the syringe barrel (102) up to the adjusted length of the pre-load locking arm (118) or the open end pre-load locking arm (118), wherein the finger grip (122) or the cylindrical ring (302) of the elongated plunger rods (108) is halted by the spherical grip flange (120) of the pre-load locking arm (118) or the open end pre-load locking arm (118).

4. The medical device (100) as claimed in claim 1, wherein, upon application of a proximally directed force on the spherical grip flange (120) of the pre-load locking arm (118) or the open end pre-load locking arm (118) to adjust to required length, and subsequently proximally directed force is applied on the finger grip (122) or the cylindrical ring (302) to impel at least one of fluid and vacuum within the chamber (204) of the syringe barrel (102), wherein while adjusting the length of the pre-load locking arm (118) or the open end pre-load locking arm (118), the inner grooves (112) on the arms of the pre-load locking arm (118) or the open end pre-load locking arm (118) is slidably engaged as locking engagement with slip tip (206) of the at least two locking elements (116).

5. The medical device (100) as claimed in claim 1, wherein the elongated plunger rods (108), is moveable in distal direction via the pre-load locking arm (118) or the open end pre-load locking arm (118) by applying the distal force on the spherical grip flange (120) and simultaneously applying proximal force on the finger flanges (104) and pressing the at least two locking elements (116), to cause the stopper (114) to expel the at least one of fluid and vacuum.

6. The medical device (100) as claimed in claim 1, wherein upon application of a distally directed force on the pre-load locking arm (118) or the open end pre-load locking arm (118), the pre-load locking arm (118) or the open end pre-load locking arm (118) moves in the distal direction without interruption upon pressing the at least two locking element (116) to release the locking engagement of the slip tip (206) with the plurality of inner groves, for re-adjusting the length of the pre-load locking arm (118) or the open end pre-load locking arm (118).

7. A pre-load locking arm (118) for a syringe barrel (102) comprising:
a pair of cylindrical plates (306) at a distal portion, a spherical grip flange (120) at a proximal portion, and a plurality of inner grooves (112) on supporting arms (310) of the pre-load locking arm (118), the pair of cylindrical plates (306) of the pre-load locking arm (118) comprises a pair of diagonally opposite opening slots (308) for accommodating a diagonally opposite internal arms (304) of the elongated plunger rods (108), the pair of cylindrical plates (306) of the pre-load locking arm (118) is slidably mounted onto the diagonally opposite internal arms (304) via a cylindrical ring (302) of the elongated plunger rods (108), and a slip tip (206) of the at least two locking elements (116) is in contact with the plurality of grooves (112) of the pre-load locking arm (118); and
at least two locking element (116) pressably mounted to the finger flanges (104) or the syringe barrel (102), and disposed within the semi-circular opening slot (124) of each finger flange (104), the at least two locking elements (116) comprises the slip tip (206);
wherein the pre-load locking arm (118) is adjusted to a required length for impelling varying amount of at least one of the fluid and the vacuum, by applying a proximally force on the spherical grip flange (120) of the pre-load locking arm (118), when a proximal force on the cylindrical ring (302) of the elongated plunger rods (108) and simultaneous distal force on the spherical grip flange (120) is applied, the elongated plunger rods (108) is proximally moved until the length of the adjusted pre-load locking arm (118), the at least one of fluid and vacuum is impelled into the chamber (204) of the syringe barrel (102) to the amount corresponding to the adjusted pre-load locking arm (118).

8. An open-end pre-load locking arm (118) for a syringe barrel (102) comprising:
a spherical grip flange (120) at a proximal portion and a plurality of inner grooves (112) on supporting arms (310) of the open end pre-load locking arm (118), the open end pre-load locking arm (118) is slidably mounted on an external surface of the syringe barrel (102) via a semi-circular opening slot (124) of each finger flange (104), and a slip tip (206) of the at least two locking elements (116) is in contact with the plurality of grooves (112) of the open end pre-load locking arm (118); and
at least two locking element (116) pressably mounted to the finger flanges (104) or the syringe barrel (102), and disposed within the semi-circular opening slot (124) of each finger flange (104), the at least two locking elements (116) comprises the slip tip (206);
wherein the open end pre-load locking arm (118) is adjusted to a required length for impelling varying amount of at least one of the fluid and the vacuum, by applying a proximally force on the spherical grip flange (120) of the open end pre-load locking arm (118), when a proximal force on the finger grip (122) of the elongated plunger rods (108) and simultaneous distal force on the spherical grip flange (120) is applied, the elongated plunger rods (108) is proximally moved until the length of the adjusted open end pre-load locking arm (118), the at least one of fluid and vacuum is impelled into the chamber (204) of the syringe barrel (102) to the amount corresponding to the adjusted open end pre-load locking arm (118).
, Description:TECHNICAL FIELD
[0001] The present subject matter relates generally to medical devices. More particularly, but not exclusively, discloses a medical device and pre-load locking arm for a syringe barrel, which can be used by one-hand technique for adjusting pre-load locking arm to a required length for impelling varying amount of at least one of the fluid and the vacuum and impelling at least one of a fluid and vacuum into a chamber of a syringe barrel, to the amount corresponding to the adjusted pre-load locking arm.
BACKGROUND
[0002] In general, syringe assemblies and Blood Collection Tubes (BCT) are well known in the medical field for dispensing fluids, such as medication and collecting blood samples, respectively. A conventional syringe or BCT typically includes a syringe barrel with an opening at one end and a plunger mechanism disposed through the other end. The plunger typically includes a plunger rod extending through the barrel, with a plunger head or stopper at the end of the plunger rod within the barrel, and with a finger flange at the other end of the plunger rod extending out of the barrel. In use, the plunger rod is retracted through the syringe barrel to aspirate or fill the syringe barrel with a fluid, such as a medication or blood, with the plunger rod extending out from the rear end of the syringe barrel. For delivery of the medication to a patient, the opening of the syringe barrel is adapted for fluid communication with a patient, such as through a hypodermic needle fitted at the front end of the syringe barrel or through a luer-type fitting extending from the front end of the syringe barrel for attachment with a fluid line of a patient. Upon depressing of the plunger rod, the plunger rod and stopper travel through the syringe barrel, thereby forcing the contents of the syringe out through the opening at the front end for delivery to the patient. Such an operation is well known in the medical field, and medical practitioners have become well accustomed to the use of such common fluid delivery procedures through standard syringes. However, such syringes or BCTs may require additional effort, for instance, by using two hands for impelling the medication or blood to the syringe barrel. Further, there is no control on the amount of impelling the medication or blood to the syringe barrel.
[0003] Further, conventional syringes are well known to be used in connection with a vial of a medication, where the user draws the fluid into the syringe immediately prior to injection and delivery of the fluid to the patient. In some instances, the syringes may be packaged as “pre-filled” devices, wherein the syringe is pre-filled with medication prior to being packaged and delivered to the end user. In this manner, there is no need for the user to fill the device prior to injection, thereby saving time for the end user and maintaining consistent volumes for delivery. Packaging of such pre-filled syringes, however, tends to be bulky. A pre-filled syringe is typically packaged with the opening at the front end of the barrel including a cap thereover and with the plunger rod retracted out of the back end of the syringe barrel, with the fluid pre-filled within the syringe barrel. Such packaging creates an elongated package that can be difficult for shipping and storage. Also, the space for storage of pre-filled syringes within controlled storage locations is often limited, thus there is a need for a syringe assembly that has a smaller packing footprint, to reduce the storage space required for containing the syringe. Also, in case of non-prefilled syringes, there should be controlled operation of the plunger for appropriate amount of medication or blood to be impelled into the syringe barrel.
[0004] Therefore, the existing syringe techniques may have drawbacks such as, for instance, while drawing the blood from the arteries or veins it may be challenging to with-draw the blood in one hand. While drawing the blood from the arteries or veins it may be challenging to with draw right amount of blood in one hand as one hand is engaged in holding the patients hand or body to make sure the syringe does not dislocate from the centre of the arteries to the side and causes pain on puncturing the walls and prevents the blood from entering the syringe. This is even more challenging when the veins or arteries are of small and curved. In addition, the extra withdrawn blood or medication may need to be ejected out before delivery, to ensure appropriate amount of blood or medication is impelled or to be expelled, which in turn causes a contamination in hygiene environment.
SUMMARY
[0005] Disclosed herein is a medical device comprising a syringe barrel having a side wall with an inside surface defining a chamber for retaining at least one of a fluid and a vacuum, an open proximal end comprising finger flanges and a distal end comprising a distal wall having at least one of a passageway therethrough in fluid communication with the chamber and an open passageway therethrough in vacuum communication with the chamber, each of the finger flanges comprises a semi-circular opening slot. The medical device further includes an elongated plunger rods disposed within two sides of the chamber of syringe barrel comprising a distal portion and a proximal portion, or a plunger rod body coupled to elongated plunger rods and extending from the distal portion to the proximal portion, the elongated plunger rods comprises a pair of diagonally opposite internal arms disposed from the proximal portion to the distal portion, the proximal portion comprises a cylindrical ring or a finger grip, and a stopper disposed at the distal portion of the elongated plunger rods for forming at least one of a fluid-tight seal and a vacuum-tight seal with the inside surface of the chamber of the syringe barrel. Further, the medical device includes at least two locking element pressably mounted to the finger flanges or the syringe barrel and disposed within the semi-circular opening slot of each finger flange, the at least two locking elements comprises a slip tip. Furthermore, the medical device includes a pre-load locking arm comprising a pair of cylindrical plates at a distal portion, a spherical grip flange at a proximal portion, and a plurality of inner grooves on supporting arms of the pre-load locking arm, or an open end pre-load locking arm comprises a spherical grip flange at a proximal portion and a plurality of inner grooves on supporting arms of the open end pre-load locking arm, the cylindrical plates of the pre-load locking arm comprises a pair of diagonally opposite opening slots for accommodating the diagonally opposite internal arms of the elongated plunger rods, the pair of cylindrical plates of the pre-load locking arm is slidably mounted onto the diagonally opposite internal arms via the cylindrical ring of the elongated plunger rods, the open end pre-load locking arm is slidably mounted on an external surface of the syringe barrel via the semi-circular opening slot of each finger flange, and the slip tip of the at least two locking elements is in contact with the plurality of grooves of the pre-load locking arm or the open end pre-load locking arm. The pre-load locking arm or the open end pre-load locking arm is adjusted to a required length for impelling varying amount of at least one of the fluid and the vacuum, by applying a proximally force on the spherical grip flange of the pre-load locking arm or the open end pre-load locking arm, when a proximal force on the finger grip or the cylindrical ring of the elongated plunger rods and simultaneous distal force on the spherical grip flange is applied, the elongated plunger rods is proximally moved until the length of the adjusted pre-load locking arm or the open end pre-load locking arm, the at least one of fluid and vacuum is impelled into the chamber of the syringe barrel to the amount corresponding to the adjusted pre-load locking arm or the open end pre-load locking arm .
[0006] Further, the present disclosure includes a pre-load locking arm for a syringe barrel. The pre-load locking arm includes a pair of cylindrical plates at a distal portion, a spherical grip flange at a proximal portion, and a plurality of inner grooves on supporting arms of the pre-load locking arm, the pair of cylindrical plates of the pre-load locking arm comprises a pair of diagonally opposite opening slots for accommodating a diagonally opposite internal arms of the elongated plunger rods, the pair of cylindrical plates of the pre-load locking arm is slidably mounted onto the diagonally opposite internal arms via a cylindrical ring of the elongated plunger rods, and a slip tip of the at least two locking elements is in contact with the plurality of grooves of the pre-load locking arm or the open end pre-load locking arm. Further, pre-load locking arm includes at least two locking element pressably mounted to the finger flanges or the syringe barrel and disposed within the semi-circular opening slot of each finger flange, the at least two locking elements comprises the slip tip. The pre-load locking arm is adjusted to a required length for impelling varying amount of at least one of the fluid and the vacuum, by applying a proximally force on the spherical grip flange of the pre-load locking arm, when a proximal force on the cylindrical ring of the elongated plunger rods and simultaneous distal force on the spherical grip flange is applied, the elongated plunger rods is proximally moved until the length of the adjusted pre-load locking arm, the at least one of fluid and vacuum is impelled into the chamber of the syringe barrel to the amount corresponding to the adjusted pre-load locking arm.
[0007] Furthermore, the present disclosure includes an open-end pre-load locking arm for a syringe barrel. The open-end pre-load locking arm a spherical grip flange at a proximal portion and a plurality of inner grooves on supporting arms of the open end pre-load locking arm, the open end pre-load locking arm is slidably mounted on an external surface of the syringe barrel via a semi-circular opening slot of each finger flange, and a slip tip of the at least two locking elements is in contact with the plurality of grooves of the open end pre-load locking arm. Further, the open-end pre-load locking arm includes at least two locking element pressably mounted to the finger flanges or the syringe barrel and disposed within the semi-circular opening slot of each finger flange, the at least two locking elements comprises the slip tip. The open end pre-load locking arm is adjusted to a required length for impelling varying amount of at least one of the fluid and the vacuum, by applying a proximally force on the spherical grip flange of the open end pre-load locking arm, when a proximal force on the finger grip of the elongated plunger rods and simultaneous distal force on the spherical grip flange is applied, the elongated plunger rods is proximally moved until the length of the adjusted open end pre-load locking arm, the at least one of fluid and vacuum is impelled into the chamber of the syringe barrel to the amount corresponding to the adjusted open end pre-load locking arm.
[0008] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DIAGRAMS
[0009] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments and, together with the description, serve to explain the disclosed principles. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system and/or methods in accordance with embodiments of the present subject matter are now described, by way of example only, and with reference to the accompanying figures, in which:
[0010] FIG. 1 illustrates a perspective view of a medical device in a half-compressed position, in accordance with some embodiments of the present disclosure;
[0011] FIG. 2A illustrates a cross-sectional view of an elongated plunger rods along with plunger rod body, in accordance with some embodiments of the present disclosure;
[0012] FIG. 2B illustrates a cross-sectional view of an open-end pre-load locking arm, in accordance with some embodiments of the present disclosure;
[0013] FIG. 2C illustrates a cross-sectional view of syringe barrel, in accordance with some embodiments of present disclosure;
[0014] FIG. 2D illustrates an enlarged view of FIG. 1, in accordance with some embodiments of present disclosure;
[0015] FIG. 3A illustrates a perspective view of medical device comprising a pre-load locking arm, in accordance with some embodiments of present disclosure;
[0016] FIG. 3B illustrates a cross-sectional view of an elongated plunger rods with cylindrical ring, in accordance with some embodiments of present disclosure;
[0017] FIG. 3C illustrates a cross-sectional view of the pre-load locking arm, in accordance with some embodiments of present disclosure;
[0018] FIG. 3D illustrates a cross-sectional view of the syringe barrel of FIG. 3A, in accordance with some embodiments of present disclosure; and
[0019] FIG. 3E illustrates an enlarged view of FIG. 3A, in accordance with some embodiments of present disclosure;
[0020] It should be appreciated by those skilled in the art that any block diagrams herein represent conceptual views of illustrative systems embodying the principles of the present subject matter. Similarly, it will be appreciated that any flow charts, flow diagrams, state transition diagrams, pseudo code, and the like represent various processes which may be substantially represented in computer readable medium and executed by a computer or processor, whether or not such computer or processor is explicitly shown.
DETAILED DESCRIPTION
[0021] In the present document, the word “exemplary” is used herein to mean “serving as an example, instance, or illustration”. Any embodiment or implementation of the present subject matter described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
[0022] While the disclosure is susceptible to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the drawings and will be described in detail below. It should be understood, however that it is not intended to limit the disclosure to the forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
[0023] The terms “comprises”, “comprising”, “includes”, “including” or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device or method that includes a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
[0024] Disclosed herein is a medical device and a pre-load locking arm for a syringe barrel. The present disclosure is of syringe for impelling fluid such as liquid medium, blood, gasses or creating vacuum into the chamber of syringe barrel, upon adjusting the pre-load locking arm to the required length. The length of pre-load locking arm is adjusted based on pulling the spherical grip flange of the pre-load locking arm. The impelling is performed by applying proximally force on a cylindrical ring or finger grip of an elongated plunger rods in two fingers and by holding/applying proximally force on the finger flange on the chamber with one finger. The fluid or vacuum in the chamber is expelled from the chamber by pushing the pre-load locking arm and by simultaneously pulling the finger flange in two fingers, which in turn moves the elongated plunger rods within the syringe barrel. Further, a precise control over impelling of liquid is achieved based on adjusting the pre-load locking arm slidably mounted to the elongated plunger rods. Further, prevention of accidental ejection of the liquid out of the chamber is achieved by using the locking elements disposed on the syringe barrel.
[0025] A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the invention. In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
[0026] FIG. 1 illustrates a perspective view of a medical device in a half-compressed position, in accordance with some embodiments of the present disclosure.
[0027] The medical device 100 in the form of a syringe includes a syringe barrel 102 and an elongated plunger rod 108. The syringe barrel 102 includes a finger flange 104 at a proximal end of the syringe barrel 102, which provides the practitioner or any user a gripping surface for the syringe barrel 102, when a fluid or a vacuum is being impelled or expelled from the syringe. The syringe barrel 102 includes a distal end and a proximal end, and a cylindrical inside surface, which defines a chamber in which the fluid or vacuum may be held. The fluid can be at least one of, but not limited to, medication blood, water, any liquid medium, and so on. The syringe barrel 102 further includes a distal wall having a passageway 106 or opening such as open passageway 106, in fluid communication or vacuum communication, with the chamber of the syringe barrel 102. The passageway 106 can also include a tip or reduced diameter portion. The open passageway may not include a tip or reduced diameter portion.
[0028] In an embodiment, the elongated plunger rods 108 includes a distal portion and a proximal portion which are assembled, as will be described in more detail below. The elongated plunger rods 108 may be disposed within the chamber for sliding sealed engagement with the inside surface of the syringe barrel 102. The elongated plunger rods 108 comprising the plunger rod body 110 comprises at least two opposite internal arms. A stopper 114 may be connected to the distal portion of the elongated plunger rods 108 for forming at least one of a fluid-tight seal and a vacuum-tight seal with the inside surface of the chamber of the syringe barrel 102. It will be understood that the stopper 114 may be integral with the elongated plunger rod 108, or it may be provided as a separate component that is releasably mounted to the elongated plunger rod 108. The stopper 114 may also include corresponding stopper holder, permitting the stopper to be assembled to the elongated plunger rod 108 using a twisting motion. The stopper 114 can also include a sealing element, such as ribs forming a seal with the inside surface of the syringe barrel 102.
[0029] The proximal portion of the elongated plunger rod 108 includes a finger grip 122. The finger grip 122 may have a textured surface. The elongated plunger rods 108 is disposed within two sides of the chamber of syringe barrel 102, which includes a distal portion and a proximal portion. The elongated plunger rods 108 may also include a plunger rod body 110 coupled to elongated plunger rods 108 and extending from the distal portion to the proximal portion. The elongated plunger rods 108 includes a pair of diagonally opposite internal arms disposed from the proximal portion to the distal portion, the proximal portion comprises a cylindrical ring or a finger grip 122.
[0030] In an embodiment, the syringe barrel 102 may include at least two locking element 116. The at least two locking element 116 is pressably mounted to the proximal end of the syringe barrel 102 and in between each finger flange 104. Each finger flange 104 is has a semi-circular open slot 124 and provides a way for each locking element 116 to be placed in the space of the semi-circular open slot 124. Further, the at least two locking elements 116 may include a slip tip for sliding engagement or locking engagement.
[0031] In an embodiment, the elongated plunger rods 108 can be separated within the chamber or may include a plunger rod body 110. When the plunger rod body 110 is attached to the elongated plunger rods 108, then the share of the plunger rods along with the plunger rod body 110 can be “+” from top view and “V” from side view. In alternative embodiments, the plunger rod body 110 may be shaped in the form of a square, rectangle, triangle of any other shape suitable for the elongated plunger rods 108. In another instance, when the elongated plunger rods 108 is separated apart and without inclusion of the plunger rod body 110, then the elongated plunger rods 108 may look like two rods within the internal surface of the chamber of the syringe barrel 102.
[0032] In an embodiment, the medical device 100 includes a pre-load locking arm 118 comprising a pair of cylindrical plates at a distal portion, a spherical grip flange 120 at a proximal portion, and a plurality of inner grooves 112 on supporting arms of the pre-load locking arm 118. Further, the medical device 100 may include an open-end pre-load locking arm 118 instead of the pre-load locking arm 118. The open end a pre-load locking arm 118 comprises a spherical grip flange 120 at a proximal portion and a plurality of inner grooves 112 on supporting arms of the open-end pre-load locking arm 118. The cylindrical plates of the pre-load locking arm 118 comprises a pair of diagonally opposite opening slots for accommodating the diagonally opposite internal arms of the elongated plunger rods 108. The pair of cylindrical plates of the pre-load locking arm 118 is slidably mounted onto the diagonally opposite internal arms via the cylindrical ring of the elongated plunger rods 108. The open end pre-load locking arm 118 is slidably mounted on an external surface of the syringe barrel 102 via the semi-circular opening slot 124 of each finger flange 104, and the slip tip of the at least two locking elements 116 is in contact with the plurality of grooves 112 of the pre-load locking arm 118 or the open end pre-load locking arm 118. The pre-load locking arm 118 or the open end pre-load locking arm 118 is adjusted to a required length for impelling varying amount of at least one of the fluid and the vacuum, by applying a proximally force on the spherical grip flange 120 of the pre-load locking arm 118 or the open end pre-load locking arm 118, when a proximal force on the finger grip 122 or the cylindrical ring of the elongated plunger rods 108 and simultaneous distal force on the spherical grip flange 120 is applied, the elongated plunger rods 108 is proximally moved until the length of the adjusted pre-load locking arm 118 or the open end pre-load locking arm 118, the at least one of fluid and vacuum is impelled into the chamber of the syringe barrel 102 to the amount corresponding to the adjusted pre-load locking arm 118 or the open end pre-load locking arm 118. The pre-load locking arm 118 or the open end pre-load locking arm 118 is slidably mounted respectively to the elongated plunger rods 108 or on the external surface of the syringe barrel 102, such that overall length of the pre-load locking arm 118 or the open end pre-load locking arm 118 is adjustable while proximally sliding the pre-load locking arm 118 or the open end pre-load locking arm 118, to a plurality of different locked lengths to each of inner grooves 112, thereby permitting varying amounts of at least one of the fluid and vacuum to be impelled in chamber of the syringe barrel 102 corresponding to the plurality of locked lengths, upon subsequently applying proximal force on the elongated plunger rods 108 via the cylindrical ring 302 or the finger grip 122. Proximal force on the elongated plunger rods 108 via the cylindrical ring 302 or the finger grip 122 can also be applied along with pre-load locking arm 118 or the open-end pre-load locking arm 118.
[0033] When distally sliding the pre-load locking arm 118 or the open end pre-load locking arm 118, and simultaneously pressing the at least two locking element 116, the pre-load locking arm 118 or the open end pre-load locking arm 118, drives the elongated plunger rods to expel at least one of the fluid and vacuum.
[0034] In an embodiment, the elongated plunger rods 108 are moving over the internal surface of chamber of the syringe barrel 102 up to the adjusted length of the pre-load locking arm 118 or the open-end pre-load locking arm 118. The finger grip 122 or the cylindrical ring of the elongated plunger rods 108 is halted by the spherical grip flange 120 of the pre-load locking arm 118 or the open-end pre-load locking arm 118. Upon application of a proximally directed force on the spherical grip flange 120 of the pre-load locking arm 118 or the open end pre-load locking arm 118 to adjust to required length, and subsequently proximally directed force is applied on the finger grip 122 or the cylindrical ring to impel at least one of fluid and vacuum within the chamber 204 of the syringe barrel 102. While adjusting the length of the pre-load locking arm 118 or the open end pre-load locking arm 118, the inner grooves 112 on the arms of the pre-load locking arm 118 or the open end pre-load locking arm 118 is slidably engaged as locking engagement with slip tip of the at least two locking elements 116.
[0035] In an embodiment, the elongated plunger rods 108, is moveable in distal direction via the pre-load locking arm 118 or the open end pre-load locking arm 118 by applying the distal force on the spherical grip flange 120 and simultaneously applying proximal force on the finger flanges 104 and pressing the at least two locking elements 116, to cause the stopper 114 to expel the at least one of fluid and vacuum. Upon application of a distally directed force on the pre-load locking arm 118 or the open end pre-load locking arm 118, the pre-load locking arm 118 or the open end pre-load locking arm 118 moves in the distal direction without interruption upon pressing the at least two locking element 116 to release the locking engagement of the slip tip with the plurality of inner groves, for re-adjusting the length of the pre-load locking arm 118 or the open end pre-load locking arm 118.
[0036] FIGs. 2A-2D show a cross sectional view of the medical device 100 depicted in FIG. 1.
[0037] The plunger rod body 110 combined with the elongated plunger rods 108 may have connected four perpendicular internal arms as depicted in FIG. 2A (only two is depicted in FIG. 2A). The plunger rod body 110 may include a finger grip 122 in proximal portion of the plunger rod body 110. Further, a stoper holder 202 is disposed in the distal portion of the piston rod body 110 to hold the stopper 114. The stoper holder 202 may also include threads for holding the stopper 114. Further, the medical device 100 which includes an open-end pre-load locking arm 118 is disposed on an outer surface of the syringe barrel 102. The cross-sectional view of the open-end pre-load locking arm 118 is depicted in FIG. 2B. The open-end pre-load locking arm 118 may include a spherical grip flange 120 in the proximal portion and the arms are extended with extension of two opposite semi-circular shaped rods, which is of equal length with the plunger rod body 110 or the elongated plunger rods 108. The inner groves 112 (or ridges 112) are disposed at equal internal for a slide or locking engagement with the locking elements 116 for a volumetric measurement of the fluids impelling into the chamber of the syringe barrel 102.The inner groves 112 are disposed on the arms.
[0038] The plunger rod body 110 combined with the elongated plunger arms 108 is inserted into a chamber 204 as depicted in FIG. 2D, of the syringe barrel 102. The open-end pre-load locking arm 118 is inserted into the semi-circular opening slot 208, as depicted in FIG. 2C. The inner groves 112 of the open-end pre-load locking arm 118 is aligned along the locking elements 116 disposed in space of semi-circular opening slot 208 of each finger flange 104.
[0039] Further, as depicted in FIG. 2C, the syringe barrel 102 may include a finger flange 104 at opposite sides of the distal end of the syringe barrel 102. Further, the locking elements 116 are disposed between each finger flange 104 and through the semi-circular opening slot 208. The locking element 116 may include extension ridge for sliding engagement or locking engagement of the open-end pre-load locking arm 118. When locking elements 116 are pressed towards the walls of the syringe barrel 102, the open-end pre-load locking arm 118 is released from the lock and sided downwards, while expelling the liquid or vacuum by pressing the spherical grip flange 120 to in turn move the elongated plunger rods 108. To impel the fluid or vacuum the open-end pre-load locking arm 118 is adjusted by pulling proximally and then the elongated plunger rods 108 is pulled proximally up to the adjusted open-end pre-load locking arm 118.
[0040] For an instance, a liquid medium, blood, gas or creating vacuum may be achieved in one hand, by pulling the spherical grip flange 120 of the open-end plunger arm 118 upwards and then by pulling the elongated plunger rods 108, while simultaneously applying proximally force on the finger flange 104. The elongated plunger rod 108 comprising the plunger rod body 110 with the stopper 114, in turn impel the contents such as liquid medium, blood, gas or creating vacuum into the chamber 204 of the syringe barrel 102. During upward movement of the open-end plunger arm 118, there could be stopping force which is known as sliding engagement with the slip tip 206 of the locking elements 116. The sliding engagement is at equal interval, and the sliding engagement is on the inner grooves 112 disposed on the open-end plunger arm 118. This stopping force helps in indication of length to in turn impel varying amount of the liquid into the chamber 204 using the elongated plunger rods 108. The inner groves 112 are provided for a precious control of impelling the liquid medium (i.e. up to the locked length of open-end plunger arm 118), blood, gasses or creating vacuum into the chamber 204 and to be precisely controlled in one hand. The precise control is provided by the multiple inner groves 112 on the open-end plunger arm 118. The inner groves 112 are disposed on two opposite sides of the internal arms at equal intervals, for instance 1 millilitre. The visual indicia of each interval may be provided on the syringe barrel 102. Further, in another instance, the slip tip 206 of the locking element 116 may prevent the open-end plunger arm 118 while sliding downwards during expelling of liquid medium, blood, gasses or creating vacuum. The slip tip 206 of the locking element 116 is released by pressing the locking element 116, which allows the slip tip 206 to move away from the inner groves of the open-end pre-load locking arm 118. The contents such as liquid medium, blood, gasses or creating vacuum in the chamber 204 is expelled by applying distally force on spherical grip flange 120 of the open-end pre-load locking arm 118 and simultaneously applying proximally force on finger flange 104.
[0041] FIG. 2D illustrates an enlarged view of FIG. 1, in which depicts a medical device 100, which comprises the syringe barrel 102, the elongated plunger rods 108 along with plunger rod body 110, the stopper 114, and the open-end pre-load locking arm 118.
[0042] FIG. 3A illustrates a perspective view of medical device 100 comprising a pre-load locking arm 118, in accordance with some embodiments of present disclosure.
[0043] In an embodiment, the chamber 204 may include the at least locking elements 116 in between each of the divided finger flange 104. Further, the medical device 100 may include an elongated plunger rods 108 disposed within two sides of the chamber 204 of syringe barrel 102 comprising a distal portion and a proximal portion. The elongated plunger rods 108 comprises a pair of diagonally opposite internal arms 304 disposed from the proximal portion to the distal portion as depicted in FIG. 3B. The proximal portion comprises a cylindrical ring 302 or a finger grip 122. A stopper 114 disposed at the distal portion of the elongated plunger rods 108 for forming at least one of a fluid-tight seal and a vacuum-tight seal with the inside surface of the chamber 204 of the syringe barrel 102.
[0044] Further, the medical device 100 may include pre-load locking arm 118, which may be slidably mounted to the elongated plunger rods 108. The pre-load locking arm 118 includes a pair of cylindrical plates 306 as depicted in FIG. 3C at a distal portion, a spherical grip flange 120 at a proximal portion, and a plurality of inner grooves 112 on supporting arms 310 of the pre-load locking arm 118. The pair of cylindrical plates 306 of the pre-load locking arm 118 comprises a pair of diagonally opposite opening slots 308, as depicted in FIG. 3C for accommodating a diagonally opposite internal arms 304 of the elongated plunger rods 108. The pair of cylindrical plates 306 of the pre-load locking arm 118 is slidably mounted onto the diagonally opposite internal arms 304 via a cylindrical ring 302 as depicted in FIG. 3B, of the elongated plunger rods 108, and a slip tip 206 of the at least two locking elements 116 is in contact with the plurality of grooves 112 of the pre-load locking arm 118.
[0045] The slip tips 206 are provided slightly closer as depicted in FIG. 3D, which helps in smooth flow during pre-load locking action and with stopping force at every equal internal for sensing while pre-load locking. In an instance, during pre-load locking, one side/both sides of the ridges 112 on the pre-load locking arm 118 may be in contact with the slip tips 206. This leaves a slight stopping force on the pre-load locking arm 118 pre-load locking action. To expel the liquid or to release the vacuum from the chamber 204, the spherical grip flange 102 is pressed towards the finger flange 104.
[0046] FIG. 3E illustrates an enlarged view of FIG. 3A, in which depicts a medical device 100 comprises the syringe barrel 102, the elongated plunger rods 108 along with plunger rod body 110, the stopper 114, and the pre-load locking arm 118.
[0047] Embodiments herein provides a medical device to impel liquid medium, liquid medicine, blood or gas into the chamber of syringe barrel, by pulling elongated plunger rods 108 via the cylindrical ring 302 or the finger grip 122 along with pre-load locking arm 118 or the open-end pre-load locking arm 118. Embodiments herein prevents damaging of arteries that is puncturing the walls due to motion artefacts, upon using only one hand force. Embodiments herein provide convenience while impelling blood from small veins or arteries and convenience to impel the blood from sharp curved arteries and veins. Embodiments herein provide pre-load locking action for impelling required volume of liquid into the chamber of syringe barrel. Embodiments herein provides precise control of impelling any liquid medium, liquid medicine, blood, or gas into the chamber in one hand, due to incorporation of inner groves and locking elements on the preload locking arms and syringe barrel, respectively. Embodiments herein allows to create vacuum in the chamber of the syringe barrel, in just one hand by the pulling action of the preload locking arm.
[0048] Embodiments herein eliminates accidental ejection of the fluid or liquid medium due to incorporation of locking elements on the syringe barrel. Embodiments herein provides physical sense to the user which is felt on the volumetric impelling of any liquid medium, liquid medicine, blood, or gas into the chamber, due to groves and ridges on the pre-load locking arm. The ejection/expelling of liquid medium is performed by push action of the pre-load locking arm which in turn pushes the plunger rods, while simultaneously pressing the locking elements from stopping the ejection of the liquid medium from the chamber of the syringe barrel. Embodiments herein prevents the user or practitioner from close contact with the patients while withdrawing the blood. Embodiments herein prevents the user or practitioner from close contact to the eye while impelling the medicine or other liquids.
[0049] A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the invention. When a single device or article is described herein, it will be apparent that more than one device/article (whether they cooperate) may be used in place of a single device/article. Similarly, where more than one device or article is described herein (whether or not they cooperate), it will be apparent that a single device/article may be used in place of the more than one device or article or a different number of devices/articles may be used instead of the shown number of devices or programs. The functionality and/or the features of a device may be alternatively embodied by one or more other devices which are not explicitly described as having such functionality/features. Thus, other embodiments of the invention need not include the device itself.
[0050] The specification has described a medical device and a plunger arm for a syringe barrel. The illustrated steps are set out to explain the exemplary embodiments shown, and it should be anticipated that ongoing technological development will change the manner in which particular functions are performed. These examples are presented herein for purposes of illustration, and not limitation. Further, the boundaries of the functional building blocks have been arbitrarily defined herein for the convenience of the description. Alternative boundaries can be defined so long as the specified functions and relationships thereof are appropriately performed. Alternatives (including equivalents, extensions, variations, deviations, etc., of those described herein) will be apparent to persons skilled in the relevant art(s) based on the teachings contained herein. Such alternatives fall within the scope and spirit of the disclosed embodiments. Also, the words "comprising," "having," "containing," and "including," and other similar forms are intended to be equivalent in meaning and be open-ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise.
[0051] Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of the invention be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present invention are intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims.