Electric surgical instrument

• US 3,901,242 A
• Filed: 05/30/1974
• Issued: 08/26/1975
• Est. Priority Date: 05/30/1974
• Status: Expired due to Term

• Current Assignee: Karl Storz
• Original Assignee: Karl Storz
• Inventors: Storz, Karl
• Primary Examiner(s): Pinkham, Richard C.
• Assistant Examiner(s): Cohen, Lee S.
• Application Number:
  US05/474,614
• Time in Patent Office: 453 Days
• Field of Search: 128/303.15,303.16,303.17,303.18,303.13,303.14,404,407-409
• US Class Current: 606/46
• CPC Class Codes: A61B 1/12 with cooling or rinsing arrangements
• CPC Class Codes: A61B 1/307 for the urinary organs, e.g. urethroscopes, cystoscopes
• CPC Class Codes: A61B 18/1402 Probes for open surgery
• CPC Class Codes: A61B 18/1485 having a short rigid shaft for accessing the inner body through natural openings
• CPC Class Codes: A61B 18/149 bow shaped or with rotatable body at cantilever end, e.g. for resectoscopes, or coagulating rollers
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: A61M 3/0283 with at least two inner passageways, a first one for irrigating and a second for evacuating suction-irrigation systems A61M1/77; aspiration tips with fluid supply means A61M1/85; for negative pressure wound therapy A61M1/92

Abstract

An electric surgical instrument includes a pair of laterally spaced, hollow tubes the distal ends of which are interconnected by a transverse electrical insulating member upon which are helically wound a pair of spaced electrodes having electrical conductors which extend through the tubes for connection to a source of high frequency current. This assembly is adapted for use with an endoscope or other similar type of instrument.

Claims

1. An electric surgical instrument, comprising:

a. a pair of elongated, laterally spaced and substantially parallel hollow tubes, b. an electrode support of electrically non-conductive material secured to and extending transversely between the tubes at one end thereof, c. a pair of electrodes mounted upon the electrode support in spaced-apart relation and extending transversely between the tubes, and d. an electrical conductor connected to each electrode and extending through one of said tubes for connection to a source of high frequency current.

2. The electric surgical instrument of claim 1 wherein the electrode support has a pair of helical threads of equal pitch spaced apart a predetermined distance and each mounting one of the pair of electrodes, with a substantial portion of the cross sectional thickness of the electrodes projecting outwardly from the threads.

3. The electric surgical instrument of claim 2 wherein the predetermined distance between the electrodes is substantially one-half the pitch of the threads.

4. The electric surgical instrument of claim 1 in combination with an endoscope having a hollow shaft, wherein the electrode support is curved to correspond with the internal diameter of the endoscope shaft, the tubes and electrode support being mounted within the hollow shaft.