Controlled motion lock for safety catheter
AssigneeJohnson & Johnson Medical, Inc.
InventorPhilip Schmidt
Life of this patent
Estimating the term…
Abstract
An intravenous catheter insertion device which incorporates a controlled motion lock including telescopingly arranged slide members for a safety catheter constituting a needle tip protector mechanism which provides fail-safe protection for clinical personnel against the possibility of accidental punctures by a used IV cannula needle through catheter needle tip protecting structure which provides an audible signal that the protecting structure is fully deployed.
Claims22
A controlled motion lock arrangement for protecting a cannula of a catheter insertion device, comprising:
- (a) a housing for receiving a first end of a cannula, said cannula extending from an end of said housing coextensively with a longitudinal axis of said housing and having a sharp-tipped point at a second end adapted to introduce a catheter into a patient;
- (b) multi-part slide means axially slidable within a longitudinal recess formed in said housing so as to be extendable from the end of said housing receiving said cannula in parallel spaced relationship with said cannula, said slide means comprising:
- (i) a first slide member in slidable contact with wall surfaces of said housing recess, means on said first slide member engageable with a locking post structure formed in said housing recess for limiting the extent of outward movement of said first slide member from said housing;
- (ii) at least one second slide member arranged within said first slide member so as to be axially displaceable with respect to said first slide member;
- cannula tip guarding means being mounted on a leading end of said second slide member;
- means locking said first slide to said locking post upon said at least one second slide member being extended;
- and means locking said at least one second slide member to said first slide member in the outermost extended positions of said slide members while generating an audible signal indicative thereof and said guarding means protectively extends about the cannula tip.
A method of actuating a controlled motion lock arrangement for protecting a cannula of a catheter insertion device, said device including a housing for receiving a first end of a cannula, said cannula extending from an end of said housing coextensively with a longitudinal axis of said housing and having a sharp-tipped point at a second end adapted to introduce a catheter into a patient;
- arranging axially displaceable multi-part slide means within a longitudinal recess formed in said housing so as to be extendable from the end of said housing receiving said cannula in parallel spaced relationship with said cannula, said method of actuating said slide means comprising:
- (i) positioning a first slide member in slidable contact with wall surfaces of said housing recess, engaging structure on said first slide member with a locking post structure formed in said housing recess for limiting the extent of outward movement of said first slide member from said housing;
- (ii) arranging at least one second slide member within said first slide member so as to be axially displaceable with respect to said first slide member having cannula tip guarding means mounted on a leading end of said at least one second slide member;
- locking said first slide to said locking post upon said at least one second slide member being extended;
- and locking said at least one second slide member to said first slide member in the outermost extended positions of said slide members while generating an audible signal indicative thereof and said guarding means protectively extends about the cannula tip.
Dependencies are inferred from the claim text.