Medical forceps jaw assembly

• US 5,820,630 A
• Filed: 10/22/1996
• Issued: 10/13/1998
• Est. Priority Date: 10/22/1996
• Status: Expired due to Fees

• Current Assignee: Annex Medical, Inc.
• Original Assignee: Annex Medical, Inc.
• Inventors: Lind, Stuart J.
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US08/735,239
• Time in Patent Office: 721 Days
• Field of Search: 128/751, 128/752, 606/205, 606/206, 606/208, 606/142, 606/119, 604/22, 600/221, 81/416
• US Class Current: 606/208
• CPC Class Codes: A61B 10/06 Biopsy forceps , e.g. with cup-shaped jaws
• CPC Class Codes: A61B 2017/2905 flexible
• CPC Class Codes: A61B 2017/2939 Details of linkages or pivot points
• CPC Class Codes: A61B 2090/3614 using optical fibre
• CPC Class Codes: A61B 90/361 Image-producing devices, e.g. surgical cameras

Abstract

A medical forceps jaw assembly for obtaining biopsy specimens or grasping objects. The forceps has a jaw assembly which incorporates a clevis pivot. The clevis pivot has a cross hole which is parallel to the center line of the jaw assembly. This cross hole, along with the lumens of the clevis and the shaft comprise a passageway. A diagnostic or procedural member can be passed through this passageway. By incorporating the diagnostic or procedural member into the passageway of the medical forceps, the need for two separate devices is eliminated for procedures which require both. By locating the cross hole appropriately in the clevis pivot, the diagnostic or procedural member can be centered between the two jaws. When used with an endoscope, the device allows two functions to be simultaneously accomplished using an endoscope with only one working channel. The design of the device is simple and cost effective.

Claims

1. A medical forceps jaw assembly comprising:

a clevis having a pivot;

pin

a first jaw pivotally attached to said clevis by said clevis pivot pin, said first jaw having a limited rotation around said clevis pivot pin;

a second jaw which opposes said first jaw;

an opening through said clevis pivot pin said opening allows passage substantially along the center line of said jaw assembly;

a drive member which is used to actuate at least one of said jaws, said drive member is capable of movement between a first proximal position and a second distal position which effects opening or closing between said jaws;

an elongated member for diagnostic or procedural purposes with a center line substantially parallel to the center line of said jaw assembly, said elongated member passes through said opening in said clevis pivot pin whereby incorporation of said elongated member into said jaw assembly allows an additional diagnostic or procedural function to be performed by said medical forceps.

2. The medical forceps jaw assembly of claim 1 wherein each said jaw has a cup with a sharp rim for taking biopsy samples.

3. The medical forceps jaw assembly of claim 1 wherein each said jaw is a gripper.

4. The medical forceps jaw assembly of claim 1 wherein said drive member is a pair of pull wires, each of which has at least one angled bend at the distal end for engagement with said jaws.

5. The medical forceps jaw assembly of claim 1 wherein said clevis pivot pin is circular.

6. The medical forceps jaw assembly of claim 1 wherein said clevis pivot pin has a threaded portion.

7. The medical forceps jaw assembly of claim 1 wherein said elongated member is a guidewire.

8. The medical forceps jaw assembly of claim 1 wherein said elongated member is a catheter.

9. The medical forceps jaw assembly of claim 1 wherein said elongated member is a diagnostic probe.

10. The medical forceps jaw assembly of claim 1 wherein said jaw assembly has a diameter less than four millimeters in the closed position.

11. A medical forceps jaw assembly comprising:

opposed jaws, said jaws each having a distal and a proximal end;

an actuation means engaged at the proximal portion of at least one of said jaws to effect opening and closing movement at the distal portion of said jaws;

a clevis including a pivot pin having a cross hole approximately parallel to the center line of said jaw assembly, at least one of said jaws pivotally attached to said clevis by said pivot pin;

a passageway extending between the proximal portion of said jaws and through said clevis pivot pin, cross hole, whereby said passageway allows incorporation of an elongated member for diagnostic or procedural purposes.

12. The medical forceps jaw assembly of claim 11 wherein each said jaw has a cup with a sharp rim for taking biopsy samples.

13. The medical forceps jaw assembly of claim 11 wherein each said jaw is a gripper.

14. The medical forceps jaw assembly of claim 11 wherein said actuation means is a pair of pull wires, each of which has at least one angled bend at the distal end for engagement with said jaws.

15. The medical forceps jaw assembly of claim 11 wherein said clevis pivot pin is circular.

16. The medical forceps jaw assembly of claim 11 wherein said clevis pivot pin has a threaded portion.

17. The medical forceps jaw assembly of claim 11 further including a guidewire within said passageway.

18. The medical forceps jaw assembly of claim 11 further including a catheter within said passageway.

19. The medical forceps jaw assembly of claim 11 further including a diagnostic probe within said passageway.

20. The medical forceps jaw assembly of claim 11 wherein said jaw assembly has a diameter of less than four millimeters in the closed position.