Apparatus for applying surgical clips

• US 5,833,696 A
• Filed: 10/03/1996
• Issued: 11/10/1998
• Est. Priority Date: 10/03/1996
• Status: Expired due to Term

• Current Assignee: United States Surgical Corporation (Medtronic Plc)
• Original Assignee: United States Surgical Corporation (Medtronic Plc)
• Inventors: Whitfield, Kenneth H., Nohilly, Martin J., Chelednik, George M.
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): TRINH, HOA B
• Application Number:
  US08/725,181
• Time in Patent Office: 768 Days
• Field of Search: 606/139, 606/143, 606/142, 606/144, 606/148
• US Class Current: 606/143
• CPC Class Codes: A61B 17/1285 for minimally invasive surgery
• CPC Class Codes: A61B 2017/00407 Ratchet means
• CPC Class Codes: A61B 2017/2837 with a locking ratchet
• CPC Class Codes: A61B 2017/2923 Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of the shaft

Abstract

A surgical clip applying instrument is disclosed which includes a handle portion, a body extending distally from the handle portion and defining a longitudinal axis, and a plurality of surgical clips disposed within the body. A jaw assembly is mounted adjacent a distal end portion of the body. The jaw assembly includes first and second jaw portions movable between a spaced-apart and an approximated position. A clip pusher is provided to individually distally advance a distalmost surgical clip to the jaw assembly while the jaw portions are in the spaced-apart position. An actuator at least partially disposed within the body is longitudinally movable in response to actuation of the handle portion. A jaw closure member is positioned adjacent the first and second jaw portions to move the jaw portions to the approximated position. The actuator and the jaw closure member define an interlock therebetween to produce simultaneous movement of the actuator and the jaw closure member when the actuator is positioned adjacent the distal end portion of the body.

Claims

1. An apparatus for application of surgical clips to body tissue, which comprises:

a) a handle portion;

b) a body extending distally from the handle portion and defining a longitudinal axis;

c) a plurality of surgical clips disposed within the body;

d) a jaw assembly mounted adjacent a distal end portion of the body, the jaw assembly including first and second jaw portions movable between a spaced-apart and an approximated position;

e) a clip pusher configured to individually distally advance a surgical clip to the jaw assembly while the jaw portions are in the spaced-apart position;

f) an actuator at least partially disposed within the body and longitudinally movable in response to actuation of the handle portion; and

g) a jaw closure member positioned adjacent the first and second jaw portions to move the jaw portions to the approximated position, the actuator and the jaw closure member including interlocking structure, the interlocking structure being movable from an unlocked position to an interlocked position during a portion of the longitudinal movement of the actuator to produce corresponding movement of the actuator and the jaw closure member wherein in the unlocked position, the actuator and the jaw closure member are longitudinally movable relative to each other.

2. An apparatus as recited in claim 1, wherein the jaw closure member includes a abutment portion engaged with the first and second jaw portions to stabilize the jaw portions.

3. An apparatus as recited in claim 2, wherein the jaw closure member includes camming structure which cooperates with camming surfaces on the first and second jaw portions.

4. An apparatus as recited in claim 3, wherein the first and second jaw portions each defines a reception surface for receiving a surgical clip, the reception surface defining an angle with the longitudinal axis of less than 90 degrees.

5. An apparatus as recited in claim 1, which further comprises a release to disengage the interlock between the clip pusher and the actuator.

6. An apparatus for application of surgical clips to body tissue, which comprises:

a) a handle portion;

b) a body extending distally from the handle portion and defining a longitudinal axis;

c) a plurality of surgical clips disposed within the body;

d) a jaw assembly mounted adjacent a distal end portion of the body, the jaw assembly including first and second jaw portions movable between a spaced-apart and an approximated position;

e) a clip pusher movably mounted to individually distally advance a surgical clip to the jaw assembly while the jaw portions are in the spaced-apart position;

f) an actuator at least partially disposed within the body and longitudinally movable in response to actuation of the handle portion;

g) a jaw closure member positioned adjacent the first and second jaw portions, the actuator and the jaw closure member including interlocking structure, the interlocking structure being movable from an unlocked position to an interlocked position to produce corresponding movement of the actuator and the jaw closure member when the actuator is positioned adjacent the distal end portion of the body, wherein in the unlocked position, the actuator and the jaw closure member are longitudinally moveable relative to each other.

7. An apparatus as recited in claim 6, wherein the jaw closure member includes a abutment portion engaged with the first and second jaw portions to stabilize the jaw portions.

8. An apparatus as recited in claim 6, which further includes a blocking mechanism to prevent movement of the clip pusher when the plurality of surgical clips has been applied.

9. An apparatus as recited in claim 8, wherein the clip pusher and the actuator define a jamming mechanism to prevent movement of the clip pusher and the actuator when the plurality of surgical clips has been applied.

10. An apparatus as recited in claim 6, which further comprises a visual indicator on the handle portion that the plurality of surgical clips has been applied.

11. An apparatus as recited in claim 6, wherein a handle portion includes a ratchet mechanism to index progressive longitudinal movement of the actuator.

12. An apparatus as recited in claim 6, wherein the ratchet mechanism includes a rack and a pawl having a plurality of teeth.

13. An apparatus for application of surgical clips to body tissue, which comprises:

a) a handle portion having a first handle and a second handle mounted for relative movement, the handles defining a single closing stroke between an open position and a closed position, the closing stroke defining an initial throw and a final throw;

b) a body extending distally from the handle portion and defining a longitudinal axis;

c) a plurality of surgical clips disposed within the body;

d) a jaw assembly mounted adjacent a distal end portion of the body, the jaw assembly including first and second jaw portions movable between a spaced-apart and an approximated position;

e) a clip pusher configured to individually distally advance a surgical clip to the first and second jaw portions while the jaw portions are in the spaced-apart position during the initial throw of the handles;

f) an actuator at least partially disposed within the body and longitudinally movable in response to actuation of the handle portion;

g) a jaw closure member positioned adjacent the first and second jaw portions, the actuator and the jaw closure member including interlocking structure, the interlocking structure being moveable from an unlocked position to an interlocked position to produce corresponding movement of the actuator and the jaw closure member during the final throw of the handles wherein in the unlocked position, the actuator and the jaw closure member are longitudinally movable relative to each other.

14. An apparatus as recited in claim 13, wherein the jaw closure member includes a abutment portion engaged with the first and second jaw portions to stabilize the jaw portions.

15. An apparatus as recited in claim 13, which further includes a blocking mechanism to prevent movement of the clip pusher when the plurality of surgical clips has been applied.

16. An apparatus as recited in claim 15, wherein the clip pusher and the actuator define a jamming mechanism to prevent movement of the clip pusher and the actuator when the plurality of surgical clips has been applied.

17. An apparatus as recited in claim 16, the jamming mechanism includes surfaces on the clip pusher and actuator configured to produce a frictional engagement between the clip pusher, the actuator and the body.

18. An apparatus as recited in claim 13, which further comprises a visual indicator on the handle portion that the plurality of surgical clips has been applied.

19. An apparatus as recited in claim 13, wherein the handles define a pivoting movement between a closed position and an open position, the handle portion including a disengagement mechanism to disengage the handle portion from the actuator during a portion of the return pivoting movement.