Surgical clamp applier/remover and detachable clamp

• US 5,921,996 A
• Filed: 05/02/1997
• Issued: 07/13/1999
• Est. Priority Date: 05/02/1997
• Status: Expired due to Fees

• Current Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Original Assignee: Cardiothoracic Systems, Inc. (Boston Scientific Corporation)
• Inventors: Sherman, Benjamin
• Primary Examiner(s): MAYNARD, JENNIFER J
• Assistant Examiner(s): Lewis, William
• Application Number:
  US08/850,806
• Time in Patent Office: 802 Days
• Field of Search: 606/120, 606/138, 606/139, 606/142, 606/143, 606/151, 606/157, 606/158
• US Class Current: 606/157
• CPC Class Codes: A61B 17/122 Clamps or clips , e.g. for the umbilical cord for the vas deferens A61F6/206
• CPC Class Codes: A61B 17/128 for applying or removing clamps or clips
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence

Abstract

A surgical clamp applier and a detachable clamp for temporarily occluding a vessel are disclosed. The clamp applier is designed to allow a surgeon to place and remove the clamp using only one hand. The clamp applier has a dial, a button, and a pulley actuator all accessible on the handle of the applier. The dial is used to lock the clamp onto the applier and to remove the clamp from the applier. The button is used to allow the pulley actuator to be used to manipulate the lower jaw of the clamp with respect to the upper jaw of the clamp, thus varying the amount of pressure exerted by the clamp on the vessel. The pulley actuator actuates a pulley system which engages the clamp, thereby manipulating the lower jaw of the clamp with respect to the upper jaw in a scissors-like manner, allowing the surgeon to properly clamp the target vessel. Various shapes and sizes of clamps are used for various procedures, but the clamps are all compatible with the clamp applier.

Claims

1. A surgical clamp applier having a proximal end and a distal end, the clamp applier comprising:

a handle;

a pulley system comprising a proximal pulley, a distal pulley, and a cable formed into a loop and wrapped around the pulleys such that the cable frictionally engages at least part of the circumference of the proximal pulley and at least part of the circumference of the distal pulley, and when operative the cable prevents longitudinal movement of the pulleys away from each other, the distal pulley having a plurality of pins extending laterally therefrom;

a tube which houses substantially the entire loop of cable, the tube having a proximal end and a distal end;

a connector to connect the pulley system and the tube to the handle;

a pulley actuator at the proximal end of the clamp applier to actuate the pulley system;

a conduit extending substantially the entire length of the tube and secured substantially therein, the conduit having a distal end for releasably engaging a clamp;

a rod extending substantially the entire length of the handle and of the tube, and housed substantially therein, the rod passing through the conduit;

means at the proximal end of the clamp applier for propelling the rod distally; and

means at the proximal end of the clamp applier for rotating the conduit about its longitudinal axis and for propelling the conduit distally.

2. The clamp applier as in claim 1 wherein the means for propelling the rod distally is a button.

3. The clamp applier as in claim 1 wherein the means for rotating the conduit about its longitudinal axis and for propelling the conduit distally is a dial.

4. The clamp applier as in claim 1 further comprising a proximal pulley retainer secured between the proximal end of the tube and the proximal pulley, and a distal pulley retainer secured between the distal end of the tube and the distal pulley, the pulley retainers preventing longitudinal movement of the pulleys towards each other.

5. The clamp applier as in claim 1 wherein the loop of cable is formed by securing a male member at one end of the cable into a female member at the other end of the cable.

6. The clamp applier as in claim 5 wherein the tube has a longitudinal opening sufficient to access the cable and to secure the male member of the cable into the female member of the cable, thus forming the loop.

7. The clamp applier as in claim 1 wherein the conduit is aligned slightly off-center of the longitudinal axis of the clamp applier.

8. A surgical clamp applier having a proximal end and a distal end, the clamp applier comprising:

a handle;

a pulley system comprising a proximal pulley, a distal pulley, and a loop of cable wrapped therearound, the distal pulley having a plurality of pins extending laterally therefrom;

a tube which houses substantially the entire loop of cable, the tube having a proximal end and a distal end;

a connector to connect the pulley system and the tube to the handle;

a proximal pulley retainer secured between the proximal end of the tube and the proximal pulley;

a distal pulley retainer secured between the distal end of the tube and the distal pulley;

a pulley actuator at the proximal end of the clamp applier to actuate the pulley system;

a conduit extending substantially the entire length of the tube and secured substantially therein, the conduit having a distal end for releasably engaging a clamp;

a rod extending substantially the entire length of the handle and of the tube, and housed substantially therein, the rod passing through the conduit;

a button at the proximal end of the clamp applier for propelling the rod distally; and

a dial at the proximal end of the clamp applier for rotating the conduit about its longitudinal axis and for propelling the conduit distally.

9. A surgical clamp applier assembly comprising:

a clamp applier comprising

(a) a handle,

(b) a pulley system comprising a distal pulley with a plurality of pins extending laterally therefrom,

(c) a connector to connect the pulley system to the handle,

(d) a pulley actuator at the proximal end of the clamp applier to actuate the pulley system,

(e) a conduit extending substantially the entire length of the clamp applier and secured substantially therein, the conduit having a distal end with a key-like tip,

(f) a rod extending substantially the entire length of the clamp applier and housed substantially therein, the rod passing through the conduit,

(g) means at the proximal end of the clamp applier for propelling the rod distally and for retracting the rod proximally, and

(h) means at the proximal end of the clamp applier for rotating the conduit about its longitudinal axis and for propelling the conduit distally; and

a surgical clamp comprising

(a) a first jaw with a proximal end and a distal end, the first jaw having a keyhole at its proximal end adapted to receive the key-like tip of the conduit,

(b) a second jaw with a proximal end and a distal end, the proximal end of the first jaw being connected to the proximal end of the second jaw at a joint, the second jaw having a plurality of pulley-pin holes at its proximal end adapted to receive the plurality of pins from the distal pulley, the second jaw being moveable relative to the first jaw from a substantially closed position to successive open positions,

(c) a jaw-locking mechanism housed substantially within the joint, naturally biased in a locking position and predisposed to convert to an unlocking position when properly contacted by the rod.

10. The surgical clamp applier assembly as in claim 9 wherein the plurality of pins are inserted into the corresponding plurality of pulley-pin holes to engage the clamp with the clamp applier.

11. The surgical clamp applier assembly as in claim 10 wherein the key-like tip of the conduit is inside the keyhole and rotated sufficiently to substantially lock the clamp onto the clamp applier.

12. The surgical clamp applier assembly as in claim 11 wherein the jaw-locking mechanism is a leaf spring positioned distally relative to the keyhole, and wherein the leaf spring converts to an unlocking position when the means for propelling the rod distally is triggered such that the rod contacts and buckles the leaf spring.

13. A method of applying a detachable clamp with opposing jaws to a target vessel in an operating area, using a clamp applier with a proximal end and a distal end, comprising the steps of:

locking the clamp onto the distal end of the clamp applier by manipulating a dial at the proximal end of the clamp applier;

placing the opposing jaws of the clamp around opposing outer surfaces of the target vessel;

adjusting from the proximal end of the clamp applier the position of the jaws relative to each other to a desired position such that the target vessel is occluded at least partially;

unlocking the clamp from the clamp applier by manipulating the dial at the proximal end of the clamp applier; and

removing the clamp applier from the clamp.

14. The method of applying a detachable clamp as in claim 13 wherein the adjusting step further comprises the steps of manipulating a button at the proximal end of the clamp applier to set the jaws in an unlocked position, and while maintaining the jaws in the unlocked position manipulating from the proximal end of the clamp applier an actuator to actuate a pulley system coupled to the jaws.

15. The method of applying a detachable clamp as in claim 13 wherein the locking step further comprises the steps of inserting pins from a distal pulley coupled to the clamp applier into pulley-pin holes in the clamp, and wherein the manipulation of the dial in the locking step further comprises the steps of rotating the dial partially about a longitudinal axis of the clamp applier and sliding the dial distally.

16. The method of applying a detachable clamp as in claim 13 wherein the manipulation of the dial in the unlocking step further comprises the steps of rotating the dial partially about a longitudinal axis of the clamp applier and sliding the dial proximally.

17. A method of clamping cardiac tissue during cardiovascular surgery comprising the steps of:

attaching a first clamp to a clamp applier;

using the clamp applier to clamp a major artery with the first clamp;

detaching the first clamp from the clamp applier;

attaching a second clamp to the clamp applier;

using the clamp applier to clamp a major vein with the second clamp; and

detaching the second clamp from the clamp applier.

18. The method of clamping cardiac tissue as in claim 17 wherein the major artery is the aorta and wherein the first clamp has substantially straight opposing jaws.

19. The method of clamping cardiac tissue as in claim 17 wherein the major vein is one of the vena cavae and wherein the second clamp has substantially C-shaped jaws which form an annular configuration when in a closed position to seal the lumen of the major vein about the exterior of a cannula.