Tissue extraction devices and methods
First Claim
Patent Images
1. A tissue resecting device comprising:
- an elongated shaft assembly including;
an outer sleeve having a lumen extending therethrough and a tissue-receiving window opening into the lumen of the outer sleeve; and
an inner sleeve disposed in the lumen of the outer sleeve and arranged to reciprocate relative to the outer sleeve, the inner sleeve including an elongate tubular member, an electrode sleeve positioned at a distal end of the inner sleeve and a ceramic collar surrounding a portion of the electrode sleeve.
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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.
79 Citations
20 Claims
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1. A tissue resecting device comprising:
an elongated shaft assembly including; an outer sleeve having a lumen extending therethrough and a tissue-receiving window opening into the lumen of the outer sleeve; and an inner sleeve disposed in the lumen of the outer sleeve and arranged to reciprocate relative to the outer sleeve, the inner sleeve including an elongate tubular member, an electrode sleeve positioned at a distal end of the inner sleeve and a ceramic collar surrounding a portion of the electrode sleeve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A tissue resecting device comprising:
an elongated shaft assembly including; an outer sleeve having a lumen extending therethrough and a tissue-receiving window opening into the lumen of the outer sleeve; and an inner sleeve disposed in the lumen of the outer sleeve and arranged to reciprocate relative to the outer sleeve, the inner sleeve including an elongate tubular member, an electrode sleeve extending distally beyond a distal end of the elongate tubular member, and a collar surrounding a portion of the electrode sleeve; wherein reciprocation of the inner sleeve relative to the outer sleeve causes the electrode sleeve to move between a fully retracted position to a fully advanced position. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
Specification