Medical instrument

• US 8,043,328 B2
• Filed: 06/18/2004
• Issued: 10/25/2011
• Est. Priority Date: 08/29/2001
• Status: Active Grant

• Current Assignee: Richard A. Hillstead, Inc.
• Original Assignee: Richard A. Hillstead, Inc.
• Inventors: Hahnen, Kevin F., Knodel, Bryan D., Hillstead, Richard A.
• Primary Examiner(s): Hughes; Tom
• Assistant Examiner(s): MILES, JONATHAN WADE
• Application Number:
  US10/871,617
• Publication Number:
  US 20040243176A1
• Time in Patent Office: 2,685 Days
• Field of Search: 227/179.1, 227/129, 606/139, 606/101, 606/37, 606/39, 606/40, 606/45, 606/46, 606/47, 606/48, 606/49, 606/50, 606/51, 606/52, 606/142, 606/205, 606/206, 606/207, 606/208, 813/01
• US Class Current: 606/205
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00539 hydraulically
• CPC Class Codes: A61B 2017/00557 inflatable A61B2017/22051 takes precedence
• CPC Class Codes: A61B 2017/07214 Stapler heads
• CPC Class Codes: A61B 2017/07221 curved
• CPC Class Codes: A61B 2017/2904 curved, but rigid
• CPC Class Codes: A61B 2017/2905 flexible
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft

Abstract

A hydraulically actuated medical instrument includes an elongated shaft having proximal and distal ends, a hydraulically actuated end effector at the distal end of the shaft and a fluid flow path extending through the shaft to the end effector. The shaft may be capable of an angled configuration where at least a portion of the shaft is manually movable to a direction in which it extends at an angle to another portion of the shaft. The end effector is not limited to a linear configuration and at least a portion of an elongated end effector extends at an angle relative to another portion of the end effector as is needed or desirable for the particular procedure to be performed.

Claims

1. A hydraulically actuated end effector for an endoscopic medical instrument, the end effector comprising:

a pair of elongated jaws relatively movable between an open position and a closed position, each jaw having first and second portions and an elongated tissue engaging surface on each jaw that faces the tissue engaging surface of the other jaw for grasping tissue therebetween when in the closed position, the elongated tissue engaging surface of at least one of the jaws having at least a first portion corresponding to the first portion of the jaw and a second portion corresponding to the second portion of the jaw, wherein the second portion of the tissue engaging surface extends from the first portion of the tissue engaging surface at a non-linear angle;

an elongated actuating path extending at least partially through the first and second portions of the at least one of the jaws and substantially parallel to the first and second portions of the tissue engaging surface of the at least one of the jaws; and

an actuating member carried by the at least one jaw and movable, in response to changes in hydraulic actuation pressure, along the actuating path between the first portion and the second portion.

2. The medical instrument of claim 1 wherein the tissue engaging surfaces of the end effector are curved.

3. The medical instrument of claim 1 wherein the angle is acute.

4. The medical instrument of claim 1 wherein the angle extends in at least selected one of a lateral and a vertical direction.

5. The medical instrument of claim 1 wherein the angle extends in a lateral direction.

6. The medical instrument of claim 1 wherein the angle extends in a vertical direction.

7. The medical instrument of claim 1 wherein at least one of the first and second portions of the jaws of the end effector has a complex curve.

8. The medical instrument of claim 1 wherein the angle simultaneously extends in a vertical direction and a lateral direction.

9. The medical instrument of claim 1 wherein the first portion is a proximal end portion of the jaw and the second portion is a distal end portion of the jaw.

10. The medical instrument of claim 1 wherein the second portions are a substantial portion of the tissue engaging surfaces.

11. The medical instrument of claim 1 wherein the angle is fixed.

12. The medical instrument of claim 1 wherein the angle is greater than 0°

and less than 180°

.

13. The medical instrument of claim 1 wherein at least one exterior surface of the end effector has a convex shape.

14. The medical instrument of claim 13 wherein the convex shape curves vertically.

15. The medical instrument of claim 1 wherein at least one exterior surface of the end effector has a concave shape.

16. The medical device of claim 15 wherein the concave shape curves vertically.

17. The medical instrument of claim 15 wherein the concave shape curves laterally.

18. The medical instrument of claim 1 wherein at least one of the first and second portions of one of the tissue engaging surfaces comprises a shape retaining malleable material.