Tissue extraction devices and methods

摘要

The tissue cutting device comprises an elongated assembly including both an outer sleeve and an inner sleeve. The outer sleeve has a tissue-receiving window, and the inner sleeve has a distal end which cuts tissue as the inner sleeve is advanced past the window. The tissue is received into a lumen of the inner sleeve, and the inner sleeve lumen is typically enlarged in a proximal direction to reduce the tendency of resected tissue to lodge therein. The tissue displacement member is optionally provided at a distal end of the outer sleeve to further aid in dislodging tissue which becomes captured in a distal end of the inner sleeve of the lumen.

主权项

1. A tissue resecting device comprising:
an elongated assembly comprising an outer sleeve having a tissue-receiving window open to an interior lumen thereof and an inner sleeve disposed coaxially in the lumen of the outer sleeve, wherein the inner sleeve is arranged to reciprocate within the outer sleeve and has a tissue-resecting distal end; wherein the inner sleeve has an axially extending channel with a distal portion and a proximal portion and wherein the distal portion has a cross-sectional area which is less than a cross-sectional area of the proximal portion.