IP Library › Granted Patent US 12,426,939
Granted Patent B2
US 12,426,939 · App. 17/595,813 · Granted Sep 30, 2025

Micro-invasive surgical device and methods of use

Inventors: Darryl E. Barnes (Eagan, MN); Jay Smith (Byron, MN)
Assignee: Mayo Foundation for Medical Education and Research
A61B18/14A61B18/082A61B18/20A61B2018/00202A61B2018/00601A61B2018/1415A61B2090/037
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Quick Facts
Patent No.
US 12,426,939
App. No.
17/595,813
Granted
Sep 30, 2025
Kind
B2
Abstract

The invention provides a tissue cutting device comprising a handle, a first blade, and a second blade. The second blade is coupled to the handle. The second blade is rotatable relative to the first blade such that the second blade is configured to rotate between a first position and a second position. The second blade is in a same plane as the first blade when the second blade is in the first position. The second blade is rotated into a different plane from the first blade when the second blade is rotated from the first position toward the second position.

Claims (15)

1. A tissue cutting device for performing a trigger finger release procedure, the tissue cutting device comprising:

a flat handle, comprising;

a first handle portion; and

a second handle portion attached to the first handle portion via multiple break points;

a first blade extending from the first handle portion and comprising:

a first arm extending from a first proximal end at the first handle portion to a first distal end;

a second arm extending parallel to the first arm from a second distal end to a second proximal end in a direction of the second handle portion without contacting the second handle portion; and

a distal tip connecting the first distal end of the first arm with the second distal end of the second arm and including a forward-facing cutting edge; and

a second blade extending from the second handle portion parallel to and between the first arm and the second arm and including a cutting edge with a hook shape that faces the handle,

wherein the first arm, the second arm, and the distal tip of the first blade surround at least a majority of the second blade, and

wherein the second handle portion is rotatable relative to the first handle portion to break the second handle portion from the first handle portion at the multiple break points and rotate the second blade relative to the first blade, such that the second blade rotates from a first plane to a second plane and into a position for cutting a target tissue with the cutting edge.

2. The tissue cutting device of claim 1 , wherein the multiple break points attaching the first handle portion to the second handle portion comprise snap perforations.

3. The tissue cutting device of claim 1 , further comprising a flange extending from the second proximal end of the second arm of the first blade.

4. The tissue cutting device of claim 3 , wherein the flange extends radially outward from the second proximal end of the second arm of the first blade.

5. The tissue cutting device of claim 4 , wherein the flange is integral to the first blade.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 24, 2021
From: BARNES, DARRYL E.; SMITH, JAY
To: MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCH
Reel/Frame 058209/0517 →
Continuity (3)
Continuation PCTUS2020012682 · Jan 8, 2020
Provisional Application 62853930 · May 29, 2019
Related Publication 20220233232A1 · Jul 28, 2022
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