Needle restraining apparatus
First Claim
1. In an improved venipuncture device comprising a needle portion including a hub means on one end and a sharpened tip at the other end and a catheter portion, said needle portion extending coaxially through the catheter portion so as to expose the distal end of the needle portion, said venipuncture device further comprising a flexible sleeve joined to the catheter portion and surrounding a part of the needle portion, the improvement comprising:
- a needle restraining means which fits over substantially the entire length of the flexible sleeve, said restraining means being joined at one end to the catheter portion and joined at the other end to the needle portion at the hub means, said means preventing coaxial movement of the needle portion with respect to the catheter portion during venipuncture, said restraining means further comprising means for removing the restraining means off from the flexible sleeve so as to permit the needle portion to be completely withdrawn after venipuncture.
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Accused Products
Abstract
Needle restraining apparatus is provided which serves to prevent a stylet needle of a venipuncture device which fits telescopically within a catheter of the venipuncture device from longitudinally moving with respect to the catheter during venipuncture. In one embodiment, the needle restraining apparatus provides a collar constructed of heat-shrinkable plastic releasably conforming to a needle hub and the hub of a tube adaptor of the venipuncture device. The collar is shrunk so that the leading and trailing ends of the collar form a non-slip fit over the irregular contour of the hub of the tube adaptor and the hub of the stylet needle. In a second embodiment of the invention, the collar is constructed of rigid plastic and preformed to engage the hub of the tube adaptor of the device and the hub of the stylet needle thereby preventing longitudinal movement of the stylet needle relative to the catheter. Structure is provided whereby the collar can be easily released to permit removal of the stylet needle from the venipuncture device after a venipuncture has been made.
243 Citations
20 Claims
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1. In an improved venipuncture device comprising a needle portion including a hub means on one end and a sharpened tip at the other end and a catheter portion, said needle portion extending coaxially through the catheter portion so as to expose the distal end of the needle portion, said venipuncture device further comprising a flexible sleeve joined to the catheter portion and surrounding a part of the needle portion, the improvement comprising:
a needle restraining means which fits over substantially the entire length of the flexible sleeve, said restraining means being joined at one end to the catheter portion and joined at the other end to the needle portion at the hub means, said means preventing coaxial movement of the needle portion with respect to the catheter portion during venipuncture, said restraining means further comprising means for removing the restraining means off from the flexible sleeve so as to permit the needle portion to be completely withdrawn after venipuncture.
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2. In a venipuncture device comprising a needle portion with a hub means on one end and a sharpened tip at the other end thereof, a catheter portion which fits telescopically over the needle portion, and a flexible sleeve joined to the catheter portion and surrounding a part of the needle portion, a needle restraining collar for preventing said needle portion from longitudinally moving relative to the catheter portion of the device during insertion, said collar fitting over substantially the entire length of the flexible sleeve and comprising:
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first restraining means for releasably securing the leading end of the collar around at least a part of the catheter portion of the device; second restraining means for releasably securing the trailing end of the collar around the hub means of the needle portion of the device, thereby preventing longitudinal movement of the needle portion relative to the catheter portion; and means for removing the collar so as to allow the needle portion to be completely withdrawn from the catheter portion. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. In a venipuncture device having a needle portion with a hub and a catheter portion with a tube adaptor fitting telescopically over said needle portion, a needle restraining collar for preventing said needle portion from moving longitudinally with respect to the catheter portion during venipuncture, the collar comprising;
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a leading end having a shoulder formed therein, the shoulder engaging a part of the contour of the tube adaptor of the catheter portion so as to prevent the collar from rearwardly slipping off the tube adaptor; a trailing end having a shoulder formed therein, the shoulder engaging a part of the contour of the hub of the needle portion so as to prevent the collar from slipping forwardly off the hub of the needle portion; a narrow membrane formed longitudinally along the length of the collar, said membrane acting as a hinge for the collar; and a latch which may be selectively released to allow the collar to open so that the needle portion can be withdrawn from the rear end of the catheter portion.
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10. In a venipuncture device comprising a needle portion having a hub means on one end and a sharpened tip at the other end thereof, a catheter portion having a hub means at one end thereof, said catheter portion fitting telescopically over said needle portion, and a flexible sleeve joined to the catheter portion and surrounding a part of the needle portion, a needle restraining collar for preventing said needle portion from longitudinally moving relative to the catheter portion, said collar spanning substantially the entire length of the flexible sleeve and comprising:
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means for releasably conforming in nonslip relation to (1) the hub means of the catheter portion of the device and (2) the hub means of the needle portion of the device, thereby preventing the needle portion from longitudinally moving relative to the catheter portion; and means for removing the collar so as to allow the needle portion to be completely withdrawn from the catheter portion. - View Dependent Claims (11, 12, 13, 14)
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15. In a venipuncture device having a needle portion and a catheter portion which fits telescopically over the needle portion, a restraining collar for preventing said needle portion from longitudinally moving relative to the catheter portion during venipuncture, the collar comprising:
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a leading end which when heated shrinks over the contour of at least part of the catheter portion, thereby preventing the collar from rearwardly slipping off the catheter portion; a trailing end which when heated shrinks over the contour of at least part of the needle portion, thereby preventing the collar from slipping forwardly off the needle portion; and a plurality of lines scribed longitudinally along the surface of the collar, said lines defining a strip of the collar which may be selectively opened, whereby permitting the collar be removed so that the needle portion can be withdrawn through the rear end of the catheter portion. - View Dependent Claims (16)
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17. A method of restraining coaxial movement of a needle portion of a venipuncture device relative to a catheter portion of said device, said device comprising a needle portion including a hub means on one end and a sharpened tip at the other end thereof, a catheter portion through which said needle portion extends coaxially, and a flexible sleeve circumscribing part of the length of the needle portion, the method comprising the steps of:
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providing a needle restraining collar which fits over substantially the entire length of the flexible sleeve; interposing said needle restraining collar between the needle portion and the catheter portion; releasably joining one end of the restraining collar to the catheter portion and joining the other end to the hub means of the needle portion so as to prevent coaxial movement of the needle portion relative to the catheter portion; and removing the collar after venipuncture to thereby permit the needle portion to be completely withdrawn.
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18. A venipuncture device comprising in combination:
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a catheter; a hollow tube adaptor joined at its forward end to one end of said catheter, the hollow of said adaptor communicating with the lumen of said catheter; a hollow flexible sleeve elastically stretched over a portion of the rear end of said tube adaptor; a dowel-shaped keeper attached to the rear end of said adaptor; and a hollow stylet needle extending coaxially through the hollow of said sleeve, the hollow of said tube adaptor, and the lumen of said catheter, thereby exposing the tip of said stylet needle beyond the distal end of the catheter, said needle having a hub comprising a cylindrical collar which fits over said elastic sleeve, said collar having a slot formed in the leading end thereof which coacts with the keeper to lock the needle relative to the catheter. - View Dependent Claims (19, 20)
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Specification