Patent ID: 9265517
Filing Date: 2016-02-23
CPC Classification: A61B

Claim Text:
1. A method for removing tissue using a tissue removal device comprising an outer shaft, a threaded inner shaft extending through the outer shaft, a cutting portion extending from the threaded inner shaft, and a collection chamber connected to the outer shaft, the method comprising: accessing an area for tissue removal; cutting a portion of tissue at a surgical site with the cutting portion of the tissue removal device; and moving the cut portion of tissue away from the surgical site through the outer shaft and into the collection chamber using the threaded inner shaft, wherein the threaded inner shaft includes a plurality of sections with different threading to enhance transportation of the cut portion of tissue through the tissue removal device, wherein the threaded inner shaft includes at least three distinct threaded sections, including distal, intermediate and proximal sections, wherein the distal section comprises a helical cutting section, the helical cutting section in the distal section is adjacent to the intermediate section, and the intermediate section has sharper threads relative to the helical cutting section.