Surgical apparatus with articulating jaw structure

• US 5,797,959 A
• Filed: 08/13/1997
• Issued: 08/25/1998
• Est. Priority Date: 09/21/1995
• Status: Expired due to Term

• Current Assignee: United States Surgical Corporation (Medtronic Plc)
• Original Assignee: United States Surgical Corporation (Medtronic Plc)
• Inventors: Castro, Salvatore, McGarry, Richard A.
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US08/910,767
• Time in Patent Office: 377 Days
• Field of Search: 606/205, 606/206, 606/207, 606/210
• US Class Current: 606/207
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 2017/2926 Details of heads or jaws
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of the shaft
• CPC Class Codes: A61B 2017/294 Connection of actuating rod to jaw, e.g. releasable
• CPC Class Codes: A61B 2017/2945 Curved jaws

Abstract

A surgical apparatus is provided which includes a handle portion and an elongated body portion extending distally from the handle portion and defining a longitudinal axis. A tool assembly is operatively associated with a distal end portion of the body portion and includes a first jaw assembly having a proximal jaw portion and a distal jaw portion and a second jaw assembly having a proximal jaw portion and a distal jaw portion. The distal and proximal jaw portions of each jaw assembly are pivotably connected to one another and are movable between first and second articulated positions. A jaw actuation mechanism is provided including an actuation member and having first and second cooperating actuating legs. Each leg is operatively connected to a respective distal portion of the first and second jaw assemblies to effectuate simultaneous pivotable movement of the distal jaw portions relative to the proximal jaw portions of the tool assembly. A jaw control mechanism operatively connects the handle portion and the tool assembly and is configured to effect movement of the tool assembly between an open position and a closed position.

Claims

1. A surgical apparatus comprising:

a) a handle portion;

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

c) a tool assembly operatively associated with a distal end portion of the body portion and including;

i) a first jaw assembly having a proximal jaw portion and a distal jaw portion; and

ii) a second jaw assembly having a proximal jaw portion and a distal jaw portion, the distal and proximal jaw portions of each jaw assembly being pivotably connected to one another and movable between first and second articulated positions;

d) a jaw actuation mechanism including a resiliently bendable actuation member having first and second cooperating actuating legs, each leg being connected to a respective one of first and second linkage members, each linkage member extending at least partially through a respective one of the proximal jaw portions of the first and second jaw assemblies and each linkage member being connected to a respective distal jaw portion of the first and second jaw assemblies to effectuate simultaneous pivotable movement of the distal jaw portions relative to the proximal jaw portions of the tool assembly, wherein the distal jaw portions of the first and second jaw assemblies each have an elongated aperture through which a connecting member is disposed to attach the distal jaw portion to the respective linkage member movement of each said linkage member relative to a respective proximal jaw portion causing each said connecting member to slide along a respective elongated aperture; and

e) a jaw control mechanism operatively connecting the handle portion and the tool assembly and configured to effect movement of the tool assembly between an open position and a closed position.

2. A surgical apparatus as recited in claim 1, wherein at least a portion of each actuating leg of the jaw actuation mechanism is disposed within a recess in the distal jaw portion.

3. A surgical apparatus as recited in claim 2, wherein each of the cooperating actuating legs is mounted for reciprocal movement along a respective longitudinal axis of each jaw assembly.

4. A surgical apparatus as recited in claim 3, wherein the proximal jaw portion of each jaw assembly has a slot formed on a distal section thereof for slidably receiving a pivot pin which connects an actuation leg to the distal jaw portion of the jaw assembly.

5. A surgical apparatus as recited in claim 1, wherein the actuation mechanism includes an elongated actuation shaft extending between the tool assembly and the handle portion and connected to the actuation member at a proximal end portion thereof.

6. A surgical apparatus as recited in claim 5, wherein the jaw actuation mechanism further includes a first rotating actuation knob for effecting axial rotation of the elongated body portion and a second rotating actuation knob operatively associated with a proximal end portion of the actuation shaft for effecting longitudinal movement of the actuation shaft and the actuation member.

7. A surgical apparatus as recited in claim 1, wherein the jaw control mechanism includes an elongated control shaft extending from a control handle pivotably associated with the handle portion to the tool assembly.

8. A surgical apparatus as recited in claim 7, wherein the jaw control mechanism includes a camming assembly at a distal end portion of the elongated control shaft, the camming assembly including a cam pin and an angled cam slot in each of the proximal jaw portions, the cam pin mounted for movement with respect to the cam slots to effectuate movement of the tool assembly between the open and closed positions.

9. A surgical apparatus as recited in claim 1, wherein the distal jaw portion has a partially curved configuration.

10. A surgical apparatus as recited in claim 9, wherein the distal jaw portion has a constant radius of curvature along the arc length thereof.

11. A surgical apparatus as recited in claim 9, wherein a major section of the distal jaw section is generally elongate in configuration.

12. A surgical apparatus as recited in claim 1, wherein the actuation member is bifurcated to form the first and second actuating legs, and each leg is movable between a longitudinally oriented first position and an angled second position wherein the first and second actuating legs are resiliently biased to the first longitudinally oriented first position.

13. A surgical apparatus as recited in claim 1, wherein the jaw actuation mechanism effects progressive pivotable movement of the distal jaw portions.

14. A surgical apparatus comprising:

a) a handle portion;

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

c) a tool assembly operatively associated with a distal end portion of the body portion and including;

i) a first jaw assembly having a proximal jaw portion and a distal jaw portion; and

ii) a second jaw assembly having a proximal jaw portion and a distal jaw portion, the distal and proximal jaw portions of each jaw assembly defining a continuous contact surface and being pivotably connected to one another and movable between first and second positions;

d) a jaw actuation mechanism connected to the first and second jaw assemblies to articulate the distal jaw portions with respect to the proximal jaw portions, wherein the jaw actuation mechanism includes a resiliently bendable longitudinally movable bifurcated actuation member of single piece construction having first and second cooperating actuating legs extending distally from a connecting portion, and wherein each distal jaw portion includes an elongated aperture through which a connecting member is disposed to pivotally attach the distal jaw portions to the jaw actuation mechanism movement of said jaw actuation mechanism relative to each of said proximal jaw portions causing each said connecting member to slide along a respective elongated aperture; and

e) a jaw control mechanism operatively connecting the handle portion and the tool assembly and configured to effectuate movement of the tool assembly between an open position and a closed position; and

f) an axially rotatable first actuation knob for effecting axial rotation of the elongated body portion.

15. A surgical apparatus as recited in claim 14, wherein the jaw actuation mechanism includes first and second linkage members each having a proximal end portion attached to a respective one of the first and second cooperating actuation legs and a distal end portion pivotally connected to a respective one of the distal jaw portions by means of the connecting member disposed through the respective elongated aperture, each linkage member extending at least partially through a respective one of the proximal jaw portions of the first and second jaw assemblies such that upon longitudinal translation of the bifurcated actuation member the distal jaw portions articulate with respect to the proximal jaw portions.

16. A surgical apparatus as recited in claim 14, wherein the proximal jaw portion of each jaw assembly has a slot formed on a distal section thereof for slidably receiving a pivot pin which connects an actuation leg to the distal jaw portion of the jaw assembly.

17. A surgical apparatus as recited in claim 14, wherein the jaw actuation mechanism includes an elongated actuation shaft which extends from the handle portion to the bifurcated actuation member.

18. A surgical apparatus as recited in claim 17, wherein the jaw actuation mechanism further includes an axially rotatable second actuation knob operatively associated with the handle portion for effectuating longitudinal movement of the actuation shaft.

19. A surgical apparatus as recited in claim 18, wherein the jaw control mechanism includes an elongated control shaft extending from a control handle pivotably associated with the handle portion to the tool assembly.

20. A surgical apparatus as recited in claim 14, wherein the control mechanism includes a camming assembly at a distal end portion of the elongated control shaft, the camming assembly including a cam pin and an angled cam slot in each of the proximal jaw portions, the cam pin mounted for movement with respect to the cam slots to effectuate movement of the jaw assembly between the open and closed positions.

21. A surgical apparatus as recited in claim 14, wherein the distal jaw portion has a partially curved configuration.

22. A surgical apparatus as recited in claim 21, wherein the distal jaw portion has a constant radius of curvature along the arc length thereof.

23. A surgical apparatus as recited in claim 21, wherein a major section of the distal jaw section is generally elongate in configuration.

24. A surgical apparatus comprising:

a) a handle portion including a pivoting control handle;

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

c) a tool assembly operatively associated with a distal end portion of the body portion and including

i) a first jaw assembly having a proximal jaw portion and a distal jaw portion,

ii) a second jaw assembly having a proximal jaw portion and a distal jaw portion, the distal and proximal jaw portions of each jaw assembly being pivotably connected to one another and movable between first and second positions;

d) a jaw actuation mechanism connected to the first and second jaw assemblies to effectuate progressive pivotable movement of the distal jaw portions relative to the proximal jaw portions, wherein the jaw actuation mechanism includes an actuation member having first and second cooperating legs, each leg being connected to a respective one of first and second links, each link extending at least partially through a passageway in a respective one of each of the proximal jaw portions of the first and second jaw assemblies, wherein the distal jaw portions of the first and second jaw assemblies each have an elongated aperture through which a respective connecting member is laterally disposed to attach the distal jaw portions to a respective one of the first and second links movement of each said link relative to a respective proximal jaw portion causing each said connecting member to slide along a respective elongated aperture;

e) a jaw control mechanism operatively connecting the pivoting control handle and the tool assembly to effectuate movement of the first and second jaw assemblies between an open position and a closed position; and

f) a first rotation mechanism operatively connected to the tool assembly and associated with the handle portion to effectuate angular rotation of the tool assembly around the longitudinal axis.

25. A surgical apparatus as recited in claim 24, wherein the actuation member is constructed as a single piece from resiliently bendable material.

26. A surgical apparatus as recited in claim 24, wherein the jaw actuation mechanism further includes a rotating actuation knob operatively associated with a proximal end portion of an actuation shaft for effectuating longitudinal movement of the actuation shaft and actuation member.

27. A surgical apparatus as recited in claim 26, wherein the distal and proximal jaw portions of each jaw assembly define a continuous contact surface.

28. A surgical apparatus as recited in claim 26, wherein the actuation member has first and second cooperating actuating legs, each leg being operatively connected to a respective distal jaw portion of the first and second jaw assemblies.

29. A surgical apparatus as recited in claim 24 further including a pawl and rack mechanism operatively associated with the jaw control mechanism for releasably maintaining selected incremental closure configurations of the first and second jaw assemblies, the pawl being operatively connected to a release trigger.