Disposable surgical instrument

• US 5,569,163 A
• Filed: 09/14/1994
• Issued: 10/29/1996
• Est. Priority Date: 09/14/1994
• Status: Expired due to Term

• Current Assignee: United States Surgical Corporation (Medtronic Plc)
• Original Assignee: United States Surgical Corporation (Medtronic Plc)
• Inventors: Scirica, Paul A., Francis, William J.
• Primary Examiner(s): Apley, Richard J.
• Assistant Examiner(s): FLANAGAN, BEVERLY MEINDL
• Application Number:
  US08/306,094
• Time in Patent Office: 776 Days
• Field of Search: 606/182, 606/219, 606/15, 606/16, 606/17, 600/133, 600/162, 607/90, 607/93, 359/510, 359/511
• US Class Current: 600/133
• CPC Class Codes: A61B 1/00103 designed for single use
• CPC Class Codes: A61B 1/00195 with eyepieces
• CPC Class Codes: A61B 1/002 having rod-lens arrangements A61B1/055 takes precedence
• CPC Class Codes: A61B 2017/0023 disposable
• CPC Class Codes: G02B 23/2476 Non-optical details, e.g. housings, mountings, supports
• CPC Class Codes: G02B 7/02 for lenses supports for magnifying lenses G02B25/002

Abstract

A surgical instrument includes at least one member fabricated with a material which is capable of deforming in the presence of a deforming agent such as water, organic solvent, air, heat, light, etc. Thus, a disposable surgical endoscope is provided wherein a lens mounting element for aligning a lens assembly of the endoscope with the other optical components of the instrument is fabricated from a polymer which deforms when exposed to, e.g., water or organic solvents. Deformation of the lens mounting element causes the lens assembly to shift out of optical alignment with the other optical components of the device, thereby disabling the instrument.

Claims

1. An endoscope comprising at least one lens mounting element for supporting at least one lens assembly of the endoscope, said lens mounting element being fabricated with a readily degrading polymeric material deforming in a sterilization medium, thereby disabling the endoscope from further use.

2. The endoscope of claim 1 selected from the group consisting of a rigid endoscope, flexible endoscope, forward view endoscope and inclined angle-of-view endoscope.

3. The endoscope of claim 1 wherein the lens mounting element is fabricated from a polymer selected from the group consisting of a water-soluble polymer and photodegradable polymer.

4. The endoscope of claim 3 wherein the water-soluble polymer is selected from the group consisting of water-soluble hydroxy-containing polymers, polyethylene oxide and polyvinyl alcohol.

5. The endoscope of claim 1 wherein the deforming agent is selected from the group consisting of water, organic solvents, heat, light and gas.

6. The endoscope of claim 1 wherein the lens assembly is an eye lens assembly for forming a magnified virtual image of an object.

7. The endoscope of claim 1 wherein the lens mounting element includes a detent for receiving an edge of the lens assembly.

8. The endoscope of claim 1 wherein the lens mounting element includes a plurality of buttons.

9. The endoscope of claim 1 wherein the endoscope includes a housing portion and an endoscopic portion extending distally from the housing portion, the housing portion supporting an eyepiece assembly which contains an eye lens assembly for viewing the image of an object formed by the optical system of the endoscope.

10. The endoscope of claim 9 wherein the eyepiece assembly is configured and dimensioned to receive a lens mounting element for supporting the eye lens assembly within the eyepiece assembly.

11. The endoscope of claim 10 wherein at least one spring element is disposed between the eyepiece assembly and the lens mounting element.

12. The endoscope of claim 11 wherein the spring element constitutes a spring washer.

13. The endoscope of claim 11 wherein the lens mounting element is fabricated from a water-soluble polymer which is capable of deforming in the presence of a deforming agent.

14. The endoscope of claim 13 wherein the water-soluble polymer is polyethylene oxide and the deforming agent is selected from the group consisting of water and organic solvent.

15. An endoscope comprising an optical transmission system for conveying images to an eyepiece, at least a portion of the optical transmission system fabricated with a readily degrading polymeric material deforming in a sterilization medium, thereby disabling the endoscope from further use.

16. The endoscope of claim 15 wherein the material is selected from the group consisting of a water-soluble polymer and photodegradable polymer.

17. The endoscope of claim 16 wherein the water-soluble polymer is selected from the group consisting of water-soluble hydroxy-containing polymers, polyethylene oxide and polyvinyl alcohol.

18. The endoscope of claim 15 wherein the deforming agent is selected from the group consisting of water, organic solvents, heat, light and gas.

19. The endoscope of claim 15 wherein the material is polyethylene oxide and the deforming agent is selected from the group consisting of water and organic solvents.

20. The endoscope of claim 15 selected from the group consisting of a rigid endoscope, flexible endoscope, forward view endoscope and inclined angle-of-view endoscope.