IP Library › Granted Patent US 12667381
Granted Patent B2
US 12667381 · App. 17/303,657 · Granted Jun 30, 2026

Resection device with razor-like cutting edges

Inventors: Tamas J. Truckai (Saratoga, CA); John H. Shadduck (Menlo Park, CA)
Assignee: Meditrina, Inc.
A61B17/32002
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Quick Facts
Patent No.
US 12667381
App. No.
17/303,657
Granted
Jun 30, 2026
Kind
B2
Abstract

Methods and devices for resecting tissue from the interior of a patient's body using a inner and outer sleeves with respective cutting windows where an inner cutting window includes reinforced section to permit increased sharpness of sections of the inner window.

Claims (9)

1 . A surgical instrument for resecting tissue, comprising:

an elongated shaft comprising an inner sleeve coaxially extending within an outer sleeve, wherein a distal region of the inner sleeve comprises an inner cutting window and a distal region of the outer sleeve comprises an outer cutting window;

wherein the inner cutting window includes a first lateral side circumferentially spaced-apart from a second lateral side, where the first lateral side and the second lateral side are each configured to have a wave-shaped cutting edge; and

wherein a peak of each wave-shaped cutting edge defines a first acute sharpness angle and a bottom of each wave-shaped cutting edge defines a second acute sharpness angle, the second acute sharpness angle being less than the first acute sharpness angle, wherein the peak of each wave-shaped cutting edge comprises a first thickness that is greater than a second thickness of the bottom of each wave-shaped cutting edge such that an adjacent wall region of the peak of each wave-shaped cutting edge strengthens the wave-shaped cutting edges on the first lateral side and on the second lateral side.

2 . The surgical instrument of claim 1 , wherein the second acute sharpness angle is at least 5 degrees sharper than the first acute sharpness angle.

3 . The surgical instrument of claim 2 , wherein the second acute sharpness angle is at least 10 degrees sharper than the first acute sharpness angle.

4 . The surgical instrument of claim 1 , wherein the second acute sharpness angle is less than 20 degrees.

5 . The surgical instrument of claim 1 , wherein the peak of each wave-shaped cutting edge comprises a radius.

6 . The surgical instrument of claim 1 , wherein the peak of each wave-shaped cutting edge comprises a sharp apex.