TISSUE EXTRACTION DEVICES AND METHODS
First Claim
1. A tissue cutting 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-cutting 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.
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Accused Products
Abstract
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.
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Citations
30 Claims
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1. A tissue cutting device comprising:
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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-cutting 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A tissue extraction device comprising:
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a handle; a shaft assembly extending axially from the handle, the shaft assembly having a tissue-receiving window communicating with an interior extraction lumen for extracting tissue; the shaft assembly comprising axially-extending first and second elements with at least one element axially being moveable relative to the other element between a first position and a second position to resect tissue received in the window; and a displacement feature coupled to the shaft and configured to displace resected tissue from the extraction lumen. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of cutting and extracting tissue, comprising:
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cutting tissue with a reciprocating inner sleeve having an extending stroke and a retracting stroke within an outer sleeve, wherein the extending stroke cuts and captures tissue received through a tissue-receiving window in the outer sleeve and wherein said cut tissue can become captured in a distal portion of a lumen of the inner sleeve; and pushing the captured tissue in a proximal direction from the distal portion of the lumen in the inner sleeve with a displacement member when the cutting sleeve is in a transition range in which the cutting sleeve transitions from the extending stroke to the retracting stroke, wherein the captured tissue is transferred into a proximal region of the inner sleeve lumen. - View Dependent Claims (28, 29, 30)
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Specification