Catheter with automatic needle guard
First Claim
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1. In combination with a catheter/needle assembly, said assembly including a catheter with a hub and an insertion needle of constant diameter having a base and tip, a needle tip protecting device for covering the tip of the needle after separation of the needle from the catheter, said protecting device comprising:
- (a) a body mounted on and slidingly supported by the insertion needle and positioned between the catheter hub and needle base;
(b) coupling means associated with said body, said body being coupled to the catheter hub through said coupling means before advancement of the protecting device to the needle tip and being detachable from said catheter hub upon separation of the insertion needle from the catheter; and
(c) needle engagement means for automatically, nonremovably, directly engaging the protective device with the outer surface of the needle against further removal of the protecting device from the needle when such device is moved to a position where it encloses the needle tip.
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Abstract
A needle tip protecting device is provided for catheters having an insertion needle. The device is small enough to be stored at the base of the catheter needle prior to and during use. After use it may be slip to cover the needle tip where it automatically self-attaches and becomes non-removable. Various embodiments of mechanisms to achieve this effect are described.
322 Citations
18 Claims
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1. In combination with a catheter/needle assembly, said assembly including a catheter with a hub and an insertion needle of constant diameter having a base and tip, a needle tip protecting device for covering the tip of the needle after separation of the needle from the catheter, said protecting device comprising:
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(a) a body mounted on and slidingly supported by the insertion needle and positioned between the catheter hub and needle base; (b) coupling means associated with said body, said body being coupled to the catheter hub through said coupling means before advancement of the protecting device to the needle tip and being detachable from said catheter hub upon separation of the insertion needle from the catheter; and (c) needle engagement means for automatically, nonremovably, directly engaging the protective device with the outer surface of the needle against further removal of the protecting device from the needle when such device is moved to a position where it encloses the needle tip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification