IL32585A

IL32585A - Needle guard

Info

Publication number: IL32585A
Application number: IL32585A
Authority: IL
Original assignee: Baxter Laboratories Inc
Priority date: 1968-10-16
Filing date: 1969-07-09
Publication date: 1971-12-29
Also published as: FR2020791A1; BE735719A; DE1934910A1; DK120451B; IL32585A0; GB1233302A

Description

1 D 0 A BAXTER This invention relates to an improved catheter needle guard unit and to a method of More the invention is broadly directed to the post ection protection of catheter needles used to make entry in the body of a patient for the placement of a catheter through a In the administration of parenteral it is common practice to make a venipuncture with a needle and then thread a sterile plastic catheter in the This catheter is light in flexible and can to the arm to remain in place as as desired without causing the patient any This catheter is exemplified by the device disclosed in Patent In such administration it is virtually impossible to remove the needle unless it contains a slot and many surgeons prefer a needle without a The needle therefor remain around the catheter adjacent the body as long as the catheter remains in It is important in such procedure that immobilized of skin or of the It has been customary heretofore to use adhesive gauze padding and the like material to wrap the needle point for this in Patents 523 and various needle protective devices have been suggested for catheter needles of the indwelling type catheter While these devices are they are not without disadvantages insofar as they possess it is an object of present invention to vide an improved catheter needle guard It is another of this invention to provide a of making an improved catheter needle guard These and other objects will be apparent to the person skilled in the art after reading the and claims Briefly the catheter needle guard unit of this invention comprises a hub having a cannula needle affixed form a passageway through the hub and said needle he distal and a needle guard means comprising elongated sleeve a longitudinal slot adapted to snap over the tire length of the needle in snug relationship therewith to form a protective closure over the point of the needle when in the closed position and swingably fastened to the hub through an intermediate flexible This guard unit can be readily as hereinafter It is convenient to use in practice insofar as it is affixed to the hub of the cannula and can be conveniently s entire after patient following While the specification concludes with claims particularly pointing out and distinctly claiming the subj ect matter regarded as forming the present it is believed that the invention will be better understood following exemplary description taken in connection with the accompanying drawings in FIGURE 1 is a side elevational embodying principles FIGURE 2 is a front elevational of the needle guard of FIGURE FIGURE 3 is a transverse sectional view of the needle guard taken along the lines 3 of FIGURE FIGURE 4 is a side elevational view showing the needl guard of FIGURE 1 in the closed Referring now to the drawings and particularly to FIGURE the reference numeral 20 is used to indicate generally of cannula having therethrough which can be adapted for fluid communication with conventional parenteral fluid administration source at extremity 20 preferably has or nipple A cannula needle 23 with distal 24 for venipuncture is axial and engagement with cannula hub Needle guard 25 is composed a sleeve 25 with a longitudinal slot 27 adapted to snap over and snugly fit needle 23 to provide a protective closure therefore in the closed a collar 28 convenient mounting to the nipple 22 of cannula 20 flexible 29 to sleeve 26 for movement of said sleeve 26 in an open closed Sleeve 26 is of sufficient primarily in thicknes and maintain its open or closed position until the application of slight forces such as by manual FIGURES 2 show needle FIGURE 2 shows the cross of sleeve 26 and collar Sleeve 26 preferably is constructed of a flexible material with a cross immobilization of the needle when in the closed 27 preferably has a width at its opening which is slightly less than the diameter of needle 23 to facilitate this snapping action and Collar 28 preferably is of a structure for convenience in manufacture and ready mounting to the nipple 22 of cannula hub FIGURES 3 and illustrate the flexibility of flexible connecting section 29 which is straight in FIGURE 3 and curved in FIGURE In of the catheter guard guard 25 is in the open position needle 23 is used to make a venipuncture in the patient and readily snapped into closed position manually by a finger of the operator after placement of the catheter in the patient and withdrawal of needle In this closed needle will be to prevent its puncturing of the skin or cutting of the The catheter guard unit can be employed in practice as a subcomponent for a complete indwelling device for the administration of parenteral fluids such as in Patent When not guard can be in the closed position to protect needle 23 from damag if catheter needle guard unit of the present invention is preferably constructed in the manner illustrated in the attached drawings n xt only for the above convenience of operation in practice but also for convenience in A preferred method of making catheter needle guard unit comprises the cut flexible connecting s ection to flexible collar cut from a piece of tubing solvent sealing said collar 23 to the reduced section of cannula hub For this purpose the slotted sleeve and the tubing for collar can be veniently made from a vinyl plastic such for plasticiz ed polyvinyl copolymers of vinyl chloride and vinylidine chloride copolymers of vinyl chloride and vinyl polyvinyl acetate and the like flexible whereas the cannula hub can be conveniently made of a relatively more rigid plastic such for copolymers polystyrene and and other sealable It will pparent that many modifications and variations can be made to the particular embodiments of the invention des cribed For the needle guard 25 can be fastened directly to the cannula hub 20 or its reduced s ection 22 without us e of a collar cannula hub 20 and needle guard 25 can be fabricated as a si cross section of sleeve 26 can be shaped instead of horseshoe shapedi although the latter shape is preferred for its better retention of needle 23 when needle guard 25 is in a clos ed The thicknes s and width of sleeve 26 can vary depending in part upon material of manufacture instead of being ring collar 28 can be or polygonal in cross sectional generally depending upon corresponding shape to cannula 20 instead of alon the length of nipple Cannula needle ean be positioned any desired orientation about its Of many variants in materials of manufacture will also be apparent to the person skilled in the Still other modifications and variations can be devis ed by the perso skilled in the art after reading the specifications and claims hereof without departing from the spirit and scope of the invention defined All such further modifications and variations are included within the s cope of the invention as defined in the appended claims insufficientOCRQuality

Claims

32585/2 . Α-μ oii'din!' cHHfrgw Claims

1. . A catheter needle guard comprising a single elongated sleeve for frictionally enclosing a needle over a maj or part of the periphery of the needle, the sleeve having a longitudinal slot through the thickness of the sleeve, a collar for fastening to a needle hub, and a flexible inter-mediate section between the sleeve and the collar providing a pivot where-by the sleeve is angularly movable relative to the collar to and from a position substantially co-axial with the collar.

2. A catheter needle guard according to Claim 1 wherein the sleeve is integrally formed with the intermediate section from plastics material.

3. A catheter needle guard according to Claim 2, wherein the sleeve and the intermediate section are formed from an extrusion having a generally horseshoe- shaped cross - section.

4. A catheter needle guard according to Claim 3 wherein the collar is a flexible annular member.

5. A catheter needle guard constructed substantially as described with reference to and as illustrated in the accompanying drawings .

6. A catheter needle guard assembly comprising a hub having a catheter needle fixed relative thereto, a passage being defined through the hub and the needle, and a guard comprising a single elongated sleeve having a longitudinal slot through the thickness of the sleeve and a collar connected to the sleeve by a flexible intermediate section providing a pivot, the collar being mounted on the hub and the sleeve being angularly movable by means of said pivot to and from a position substantially co-axial with the collar, the sleeve being snap-engageable over substan- tially the entire length of the needle in said position. 3258§/2*

7. A catheter needle guard assembly according to Claim 6, wherein the needle guard is constructed according to any one of Claims 2 to 5.

8. A catheter needle guard assembly constructed substantially as herein described and illustrated in the accompanying drawings.

9. A method of making, a catheter needle guard according to Claim 1 , comprising forming an extrusion of plastics material, the extrusion having a generally horseshoe-shaped cross -section, cutting a part of the extrusion to define said intermediate section providing a pivot, the remainder of the extrusion defining said sleeve and heat sealing the intermediate section to a flexible, annular collar.

10. A method of making a catheter needle guard assembly according to Claim 6 comprising the steps of Claim 9 and then solvent. sealing the collar to the hub of the assembly. - 7 - For the * pplicants "^****^- :. PHOLD COHN AND PARTNERS