Safety needle instrument having a triggered safety member
First Claim
1. A safety needle instrument for penetrating anatomical tissue to gain access to an anatomical cavity comprisinga hub;
- a needle mounted by said hub and having a sharp distal end for penetrating anatomical tissue;
a safety member having a blunt distal end and being movable relative to said hub between an extended position where said safety member distal end protrudes distally from said sharp needle distal end and a retracted position where said safety member distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end;
bias means for biasing said safety member to move distally relative to said hub toward said extended position and for permitting said safety member to move proximally relative to said hub toward said retracted position;
a handle coupled with said safety member to manually move said safety member proximally relative to said hub from said extended position to said retracted position;
a locking mechanism engageable with said safety member to lock said safety member in said retracted position; and
a releasing mechanism responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said bias means to move said safety member distally relative to said hub from said retracted position to said extended position.
0 Assignments
0 Petitions
Accused Products
Abstract
A safety needle instrument for penetrating a wall of an anatomical cavity to gain access to the anatomical cavity includes a needle having a sharp distal end for penetrating the anatomical cavity wall, a distally biased safety member having a distal end movable between an extended position protecting the sharp distal end of the needle and a retracted position exposing the sharp distal end of the needle, a handle for manually moving the safety member to the retracted position and a locking and releasing mechanism for locking the safety member in the retracted position and releasing the safety member to return to the extended position in response to distal movement of an operating member upon penetration of the safety needle instrument into the anatomical cavity, the operating member being preferably carried by the needle.
110 Citations
25 Claims
-
1. A safety needle instrument for penetrating anatomical tissue to gain access to an anatomical cavity comprising
a hub; -
a needle mounted by said hub and having a sharp distal end for penetrating anatomical tissue; a safety member having a blunt distal end and being movable relative to said hub between an extended position where said safety member distal end protrudes distally from said sharp needle distal end and a retracted position where said safety member distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end; bias means for biasing said safety member to move distally relative to said hub toward said extended position and for permitting said safety member to move proximally relative to said hub toward said retracted position; a handle coupled with said safety member to manually move said safety member proximally relative to said hub from said extended position to said retracted position; a locking mechanism engageable with said safety member to lock said safety member in said retracted position; and a releasing mechanism responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said bias means to move said safety member distally relative to said hub from said retracted position to said extended position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A safety needle instrument for penetrating anatomical tissue to gain access to an anatomical cavity comprising
a needle having a sharp distal end for penetrating anatomical tissue; -
a safety member having a blunt distal end and being movable relative to said needle between an extended position where said safety member distal end protrudes distally from said sharp needle distal end and a retracted position where said safety member distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end; bias means for biasing said safety member to move distally toward said extended position and for permitting said safety member to move proximally toward said retracted position; a handle coupled with said safety member to manually move said safety member proximally to said retracted position; a locking mechanism engageable with said safety member to lock said safety member in said retracted position; and a releasing mechanism responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said bias means to move said safety member to said extended position; wherein said sharp distal end of said needle defines an opening and said safety member distal end extends through said needle sharp distal end.
-
-
14. A safety needle instrument for penetrating anatomical tissue to gain access to an anatomical cavity comprising
a needle having a sharp distal end for penetrating anatomical tissue; -
a hub mounting said needle; a safety member having a blunt distal end and being movable relative to said needle and hub between an extended position where said safety member distal end protrudes distally from said sharp needle distal end and a retracted position where said safety member distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end; bias means for biasing said safety member to move distally toward said extended position and for permitting said safety member to move proximally toward said retracted position; a handle coupled with said safety member to manually move said safety member proximally to said retracted position; a locking mechanism engageable with said safety member to lock said safety member in said retracted position; a releasing mechanism responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said bias means to move said safety member to said extended position; and needle bias means for biasing said needle distally and for permitting proximal movement of said needle and hub with respect to said hub and wherein said releasing mechanism includes an operating member coupled with said needle for triggering release of said locking mechanism when said needle bias means moves said needle distally upon penetration into the anatomical cavity.
-
-
15. A safety needle instrument for penetrating anatomical tissue to gain access to an anatomical cavity comprising
a needle having a sharp distal end for penetrating anatomical tissue and a proximal end; -
a hub receiving said needle proximal end; needle bias means for biasing said needle distally relative to said hub and permitting proximal movement of said needle relative to said hub in response to a force on said needle distal end; a safety member having a blunt distal end and being movable relative to said hub between an extended position where said safety member distal end protrudes distally from said sharp needle distal end and a retracted position where said safety member distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end; safety member bias means for biasing said safety member to move distally relative to said hub toward said extended position and for permitting said safety member to move proximally relative to said hub toward said retracted position; a locking mechanism engageable with said safety member to lock said safety member in said retracted position; and a releasing mechanism responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said safety member bias means to move said safety member distally relative to said hub from said retracted position to said extended position. - View Dependent Claims (16, 17)
-
-
18. A safety needle instrument for penetrating anatomical tissue to gain access to an anatomical cavity comprising
a needle having a sharp distal end for penetrating anatomical tissue and a proximal end; -
a hub receiving said needle proximal end; needle bias means for biasing said needle distally relative to said hub and permitting proximal movement of said needle relative to said hub in response to a force on said needle distal end; a safety member having a blunt distal end and being movable relative to said needle between an extended position where said safety member distal end protrudes distally from said sharp needle distal end and a retracted position where said safety member distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end; safety member bias means for biasing said safety member to move distally toward said extended position and for permitting said safety member to move proximally toward said retracted position; a locking mechanism engageable with said safety member to lock said safety member in said retracted position; and a releasing mechanism responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said safety member bias means to move said safety member to said extended position, wherein said releasing mechanism includes an operating member carried by said needle for triggering release of said locking mechanism upon said needle bias means moving said needle distally when said needle enters the anatomical cavity.
-
-
19. A safety needle instrument for penetrating anatomical tissue to gain access to an anatomical cavity comprising
a needle having a sharp distal end for penetrating anatomical tissue and a proximal end; -
a hub receiving said needle proximal end; needle bias means for biasing said needle distally relative to said hub and permitting proximal movement of said needle relative to said hub in response to a force on said needle distal end; a safety member having a blunt distal end and being movable relative to said needle between an extended position where said safety member distal end protrudes distally from said sharp needle distal end and a retracted position where said safety member distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end; safety member bias means for biasing said safety member to move distally toward said extended position and for permitting said safety member to move proximally toward said retracted position; a locking mechanism engageable with said safety member to lock said safety member in said retracted position; and a releasing mechanism responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said safety member bias means to move said safety member to said extended position; wherein said sharp end of said needle defines an opening and said safety member distal end extends through said sharp needle distal end.
-
-
20. A safety needle instrument for penetrating a wall of an anatomical cavity to gain access to the anatomical cavity comprising
a housing; -
an elongate, tubular catheter having a distal end for positioning in the anatomical cavity and a proximal end for positioning externally of the anatomical cavity wall; a needle disposed in said catheter having a sharp distal end for penetrating the anatomical cavity wall; a safety member mounted by said housing and having a blunt distal end, said safety member being movable relative to said housing between an extended position where said safety member distal end protrudes distally from said sharp needle distal end and a retracted position where said safety member distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end; bias means for biasing said safety member to move distally relative to said housing toward said extended position and for permitting said safety member to move proximally relative to said housing toward said retracted position; a locking mechanism engageable with said safety member to lock said safety member in said retracted position; and a releasing mechanism including an operating member movable distally responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said bias means to move said safety member distally relative to said housing from said retracted position to said extended position.
-
-
21. A safety needle instrument for penetrating anatomical tissue to gain access to an anatomical cavity comprising
a housing; -
a needle having a sharp distal end for penetrating anatomical tissue and a proximal end mounted by said housing; a catheter having a blunt distal end and a proximal end mounted by said housing, said catheter being movable relative to said housing between an extended position where said catheter distal end protrudes distally from said sharp needle distal end and a retracted position where said catheter distal end is disposed proximally of said sharp needle distal end to expose said sharp needle distal end; bias means for biasing said catheter to move distally relative to said housing toward said extended position and for permitting said catheter to move proximally relative to said housing toward said retracted position; a locking mechanism engageable with said catheter to lock said catheter in said retracted position prior to penetrating anatomical tissue; and a releasing mechanism responsive to entry of said safety needle instrument into the anatomical cavity to trigger release of said locking mechanism to permit said bias means to move said catheter distally relative to said housing from said retracted position to said extended position; wherein said housing includes a gripping member releasably securing said catheter proximal end to said housing. - View Dependent Claims (22, 23, 24, 25)
-
Specification