Radial jaw biopsy forceps

• US 5,666,965 A
• Filed: 06/02/1995
• Issued: 09/16/1997
• Est. Priority Date: 05/10/1990
• Status: Expired due to Term

• Current Assignee: Symbiosis Corporation (Boston Scientific Corporation)
• Original Assignee: Symbiosis Corporation (Boston Scientific Corporation)
• Inventors: Slater, Charles R., Smith, Kevin W., Bales, Thomas O.
• Primary Examiner(s): Sykes, Angela D.
• Assistant Examiner(s): GILBERT, SAMUEL G
• Application Number:
  US08/458,215
• Time in Patent Office: 837 Days
• Field of Search: 128/749-751, 606/205-208, 606/167, 606/170, 606/174
• US Class Current: 600/562
• CPC Class Codes: A61B 10/02 Instruments for taking cell samples or for biopsy A61B10/0038 and A61B10/0045 take precedence; needle locating or guiding means A61B17/3403; samplers for enzymology or microbiology C12M1/26; sampling or preparing biological specimens G01N33/48
• CPC Class Codes: A61B 10/06 Biopsy forceps , e.g. with cup-shaped jaws
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 17/30 Surgical pincettes without pivotal connectionsfor holding suture needles or materials A61B17/0483; wound clamps A61B17/08 ; hand-held gripping tools without pivotal connections in general B25B9/02
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/3201 Scissors for biopsy A61B10/02
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2010/0225 for taking multiple samples
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable
• CPC Class Codes: A61B 2017/0088 ceramic
• CPC Class Codes: A61B 2017/292 connection of actuating rod to handle, e.g. ball end in recess
• CPC Class Codes: A61B 2017/2926 Details of heads or jaws
• CPC Class Codes: A61B 2017/2931 with releasable head
• CPC Class Codes: A61B 2017/2939 Details of linkages or pivot points
• CPC Class Codes: A61B 2017/2945 Curved jaws
• CPC Class Codes: A61B 2018/00077 high, i.e. electrically conducting
• CPC Class Codes: A61B 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/00107 Coatings on the energy applicator
• CPC Class Codes: A61B 2018/00148 : with metal
• CPC Class Codes: A61B 2018/1253 : monopolar
• CPC Class Codes: A61B 2018/1412 : Blade
• CPC Class Codes: A61B 2018/1415 : multiple blades
• CPC Class Codes: A61B 2018/1432 : curved
• CPC Class Codes: A61B 2018/1455 : having a moving blade for cutting tissue grasped by the jaws
• CPC Class Codes: A61B 2018/146 : Scissors
• CPC Class Codes: A61B 2090/064 : for measuring force, pressure or mechanical tension
• CPC Class Codes: A61M 2025/0098 : having a strain relief at the proximal end, e.g. sleeve
• CPC Class Codes: A61M 2205/6081 : Colour codes
• CPC Class Codes: H01L 21/67126 : Apparatus for sealing, encapsulating, glassing, decapsulating or the like processes H01L23/02, H01L23/28
• CPC Class Codes: H01L 21/6715 : Apparatus for applying a liquid, a resin, an ink or the like H01L21/67126 takes precedence
• CPC Class Codes: Y10T 403/32181 : Universal
• CPC Class Codes: Y10T 403/32221 : Articulate joint comprises pivoted clevis or channel bar
• CPC Class Codes: Y10T 74/18944 : Link connections
• CPC Class Codes: Y10T 74/20402 : Flexible transmitter [e.g., Bowden cable]

Abstract

A biological forceps device for the taking of tissue samples from a body, comprising a flexible main coil attached at its distal end to a pair of homologous cast jaws. The jaws have radially arranged teeth on their distalmost end. The jaws are opened and closed by attachment to a pair of pull wires which extend through the main coil, into a handle at its proximal end. The handle has a spool which slides about a central shaft attached to the main coil. The spool is attached to the pull wires, so that movement of the spool with respect to the central shaft, effectuates a force on the proximal ends of the levered jaws, to open and close them, appropriately.

Claims

1. An endoscopic instrument, comprising:

a) a flexible tube having a distal end and a proximal end;

b) opposed first and second jaws, said first jaw being rotatably disposed on said distal end of said flexible tube, and said first jaw including a proximal tang defining a first bore; and

c) actuation means for effecting rotation of said first jaw, said actuation means comprising a first pull wire having a first pair of angled bends at a distal end of said first pull wire, said first pull wire extending through said first bore at said first pair of angled bends, and terminating without forming a loop.

2. An endoscopic instrument according to claim 1, wherein:

said flexible tube comprises a coil, and said first pull wire extends through said coil.

3. An endoscopic instrument according to claim 2, wherein:

said second jaw includes a second proximal tang defining a second bore and is rotatably disposed on said distal end of said coil, and

said actuation means further comprises a second pull wire having a second pair of angled bends at a distal end of said second pull wire, with said second pull wire extending through said second bore at said second pair of angled bends.

4. An endoscopic instrument according to claim 3, further comprising:

d) a clevis coupled to said distal end of said flexible tube, said clevis having a cross pin, wherein said first jaw defines a first pin-receiving hole and said said second jaw defines a second pin-receiving hole through which said cross pin extends, and said first and second jaws rotate about said cross pin.

5. An endoscopic instrument according to claim 4, wherein:

said opposed first and second jaws are biopsy forceps cups.

6. An endoscopic instrument according to claim 3, wherein:

said actuation means further comprises a handle disposed on said proximal end of said flexible tube and coupled to said first pull wire and to said second pull wire.

7. An endoscopic instrument according to claim 6, wherein:

said handle comprises a central shaft having a longitudinal bore which receives a proximal end of said first pull wire and a proximal end of said second pull wire, a spool having a central opening which receives said central shaft, and engagement means in said spool for engaging said actuation means.

8. An endoscopic instrument according to claim 7, wherein:

said opposed first and second jaws are biopsy forceps cups.

9. An endoscopic instrument according to claim 2, wherein:

said opposed first and second jaws are biopsy forceps cups.

10. An endoscopic instrument according to claim 1, wherein:

said second jaw includes a second proximal tang defining a second bore and is rotatably disposed on said distal end of said flexible tube, and

said actuation means further comprises a second pull wire having a second pair of angled bends at a distal end of said second pull wire, with said second pull wire extending through said second bore at said second pair of angled bends.

11. An endoscopic instrument according to claim 10, further comprising:

d) a clevis coupled to said distal end of said flexible tube, said clevis having a cross pin, wherein said first jaw defines a first pin-receiving hole and said said second jaw defines a second pin-receiving hole through which said cross pin extends, and said first and second jaws rotate about said cross pin.

12. An endoscopic instrument according to claim 10, wherein:

said actuation means further comprises a handle disposed on said proximal end of said flexible tube and coupled to said first pull wire and to said second pull wire.

13. An endoscopic instrument according to claim 12, wherein:

said handle comprises a central shaft having a longitudinal bore which receives a proximal end of said first pull wire and a proximal end of said second pull wire, a spool having a central opening which receives said central shaft, and engagement means in said spool for engaging said actuation means.

14. An endoscopic instrument according to claim 10, wherein:

said opposed first and second jaws are biopsy forceps cups.

15. An endoscopic instrument according to claim 1, further comprising:

d) a clevis coupled to said distal end of said flexible tube, said clevis having a cross pin, wherein said first jaw defines a first pin-receiving hole through which said cross pin extends, said first jaw rotating about said cross pin.

16. An endoscopic instrument according to claim 1, wherein:

said actuation means further comprises a handle disposed on said proximal end of said flexible tube and coupled to said first pull wire.

17. An endoscopic instrument according to claim 16, wherein:

said handle comprises a central shaft having a longitudinal bore which receives a proximal end of said first pull wire, a spool having a central opening which receives said central shaft, and engagement means in said spool for engaging said actuation means.

18. An endoscopic instrument according to claim 1, wherein:

said opposed first and second jaws are biopsy forceps cups.

19. An endoscopic instrument, comprising:

a) a flexible tube having a distal end and a proximal end;

b) opposed first and second jaws, said first jaw being rotatably disposed on said distal end of said flexible tube, and said first jaw including a proximal tang defining a first bore, said proximal tang having a proximal end; and

c) actuation means for effecting rotation of said first jaw, said actuation means comprising a first pull wire having a first pair of angled bends at a distal end of said first pull wire, said first pull wire extending through said first bore at said first pair of angled bends, and terminating at a point distal of said proximal end of said tang.