Cutter for surgical probe

• US 5,733,297 A
• Filed: 09/10/1996
• Issued: 03/31/1998
• Est. Priority Date: 09/10/1996
• Status: Expired due to Fees

• Current Assignee: Medical Instrument Development Laboratories, Inc.
• Original Assignee: Medical Instrument Development Laboratories, Inc.
• Inventors: Wang, Carl C. T.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Truong, Kevin
• Application Number:
  US08/711,198
• Time in Patent Office: 567 Days
• Field of Search: 606/171, 606/170, 606/167, 606/159
• US Class Current: 606/167
• CPC Class Codes: A61B 2017/00544 pneumatically
• CPC Class Codes: A61F 9/00763 with rotating or reciprocating cutting elements, e.g. concentric cutting needles atherectomy cutting instruments A61B17/3207; endoscopic cutting instruments A61B17/320016

Abstract

A cutter for use in a surgical probe where the cutter has a first end for being coupled to a driving mechanism and an opposite end on which a blade portion and a contact portion are formed. The cutter is formed from a tube of hard material, such as stainless steel. The contact portion extends beyond the blade portion, which is used to cut tissue, thereby preventing the blade portion from contacting or hitting the inner surface of the closed end or tip of the needle of the probe.

Claims

1. A front end of a surgical probe comprising:

a first tube having a wall, a closed end with an inner surface, and an aperture formed in the wall near the closed end; and

a second tube coaxial with and telescoped within the first tube and having a first end for being coupled to a driving mechanism and a second end with a blade portion for cutting tissue and a contact portion formed on the second end, adjacent and extending beyond to the blade, the contact portion for preventing the blade portion from contacting the inner surface of the closed end of the first tube.

2. A front end of a surgical probe as claimed in claim 1, wherein the second end of the second tube is angled.

3. A front end of a surgical probe as claimed in claim 2, wherein an extended first portion of the angled second end of the second tube is relatively dull compared to a shorter second portion of the angled second end of the second tube.

4. A front end of a surgical probe as claimed in claim 1, wherein the contact portion on the second end of the second tube is a foot which extends beyond the blade portion of the second end of the second tube.

5. A front end of a surgical probe as claimed in claim 1, wherein the foot extends about 0.0025 inches beyond the blade.

6. A front end of a surgical probe as claimed in claim 1, wherein the first tube and the second tube are manufactured from stainless steel.

7. A front end of a surgical probe as claimed in claim 1, wherein the aperture is about 0.025 inches from the closed end of the first tube.

8. A cutter for use with a surgical probe having a front portion, the front portion including a first tube with a wall, a closed end with an inner surface, and an aperture formed in the wall near the closed end, the cutter comprising:

a second tube capable of being coaxial with and telescoped within the first tube and having a first end for being coupled to a driving mechanism and a second end including a blade portion for cutting tissue and a non-cutting contact portion extending beyond the blade portion, the contact portion for preventing the blade portion from contacting the closed end of the first tube.

9. A cutter as claimed in claim 8, wherein the second end is angled.

10. A cutter as claimed in claim 9, wherein an extended first portion of the second end is relatively dull compared to a shorter second portion of the second end.

11. A cutter as claimed in claim 8, wherein the contact portion is a foot which extends beyond the blade portion.

12. A cutter as claimed in claim 8, wherein the first tube and the second tube are manufactured from stainless steel.