Multi-lumen core deflecting endoscope

• US 4,748,969 A
• Filed: 05/07/1987
• Issued: 06/07/1988
• Est. Priority Date: 05/07/1987
• Status: Expired due to Term

• Current Assignee: ACMI Corp. (Olympus Corporation)
• Original Assignee: Circon Corp. (Olympus Corporation)
• Inventors: Wardle, John L.
• Primary Examiner(s): Grieb, William H.
• Application Number:
  US07/047,687
• Time in Patent Office: 397 Days
• Field of Search: 128/3, 128/4, 128/5, 128/6, 128/7, 350/96.26, 138/120
• US Class Current: 600/150
• CPC Class Codes: A61B 1/0051 with controlled bending of insertion part
• CPC Class Codes: A61B 1/307 for the urinary organs, e.g. urethroscopes, cystoscopes
• CPC Class Codes: A61B 1/31 for the rectum, e.g. proctoscopes, sigmoidoscopes , colonoscopes

Abstract

An endoscope having a control head, an objective head and a flexible shaft therebetween. The shaft has a flexible core with a conduit means therewith. A deflection means is provided with the shaft having a tension member and a distal end compression member for controllably returning the distal end to an undeflected position.

Claims

1. An instrument of a generally tubular flexible shape for accessing a target area, the instrument having a proximal region thereof, a distal region thereof, and a shaft therebetween, said shaft comprising:

structural core means of a substantially flexible and resilient material having a first longitudinal axis, said core means forming a flexible frame which can cooperate in conveying the distal region of the instrument towards the target area while also defining a conduit means therewith; and

deflection means disposed on said flexible core means, said deflection means being connected to said distal region at an offset from said first longitudinal axis whereby upon activation of said deflection means said distal region is deflected.

2. An instrument as in claim 1 further comprising a deflection recovery means.

3. An instrument as in claim 2 wherein said recovery means comprises a distal region spring means.

4. An instrument as in claim 2 wherein said recovery means comprises a proximal region spring means.

5. An instrument as in claim 2 wherein said deflection recovery means comprises a spring sheath having a proximal end spring section and a sheath section.

6. An instrument as in claim 1 further comprising a shaft torque stabilizer means.

7. An instrument as in claim 5 wherein said torque stabilizer means is selectively connected to said core means.

8. An instrument as in claim 7 wherein said torque stabilizer means is substantially unfastened to said core means adjacent said distal region.

9. An instrument as in claim 1 wherein said core means is a polymer material.

10. An instrument as in claim 1 wherein said deflection means comprises a tension means.

11. An instrument as in claim 1 wherein said deflection means comprises a compression means including a compressively stable connection member.

12. An instrument as in claim 1 wherein said shaft is about 10 French in circumference.

13. An instrument as in claim 1 wherein said shaft further comprising passive deflection means.

14. An instrument of a generally tubular flexible shape for accessing a target area, the instrument having a proximal region thereof, a distal region thereof, a shaft therebetween having a longitudinal axis and deflection means for deflecting said distal region, said deflection means comprising:

a deflection member disposed on a channel on said shaft, said deflection member having a distal portion connected to said distal region at a position offset from said longitudinal axis and a proximal portion operably connected to said proximal region;

deflection member control means for deflecting said distal region from a home position to a deflected position; and

deflection recovery means for at least partially automatically returning said distal region from said deflected position to said home position as said control means is inactivated.

15. An instrument as in claim 14 wherein said deflection recovery means comprises a distal region spring means.

16. An instrument as in claim 14 wherein said deflection recovery means comprises a proximal region spring means.

17. An instrument as in claim 15 wherein said spring means forms a sheath about said deflection member.

18. An instrument as in claim 14 wherein said home position has said distal region in a substantially straight position.

19. An instrument as in claim 14 wherein said home position has said distal region in a substantially curved position.

20. A method of manufacturing an instrument of a generally tubular flexible shape of accessing a target area, the instrument having a proximal region thereof, a distal region thereof, a shaft therebetween, and a deflection means, the method comprising the steps of:

mounting a deflection member on a channel means of a structural core of flexible material, said core having a first longitudinal axis, said deflection member being offset from said first longitudinal axis proximate said distal region; and

mounting a deflection recovery means on said core, said deflection recovery means comprising a spring means connected to said distal region at an offset, proximate said distal region, from said first longitudinal axis whereby said distal region is deflectable and said deflection recovery means cooperates to return said distal region to an undeflected position.