Tissue cutting systems and methods
First Claim
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1. A tissue resecting probe comprising:
- a handle coupled to a windowed outer sleeve and a reciprocating radio-frequency (RF) inner resecting sleeve wherein such reciprocation moves the probe between window-open and window-closed positions at a reciprocation speed; and
a motor drive in the handle, andan actuator coupled to the motor drive and rotatable therewith, the actuator configured to convert rotational motion from the motor drive to reciprocation motion of the inner resecting sleeve for reciprocating the inner resecting sleeve across a window of the outer sleeve between the window-open position and the window-closed position, the actuator including an arcuate slot shaped to vary a reciprocation speed of the inner resecting sleeve such that the reciprocation speed of the reciprocating inner resecting sleeve is variable within one complete reciprocation stroke, wherein the complete reciprocation stroke includes an extending stroke in which the inner resecting sleeve moves from the window-open position to the window-closed position and a retracting stroke in which the inner resecting sleeve moves from the window-closed position to the window-open position.
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Abstract
A probe for resecting and coagulating tissue comprises an outer sleeve having a tissue cutting window and an inner sleeve having a tissue cutting distal end. And RF cutting region is formed at the distal end of the inner member and an RF coagulation region is formed on an exterior surface of the inner member immediately proximal to the cutting surface. A single power supply providing a single RF energy mode can be connected to both RF applicator regions to simultaneously cut and coagulate tissue.
84 Citations
27 Claims
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1. A tissue resecting probe comprising:
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a handle coupled to a windowed outer sleeve and a reciprocating radio-frequency (RF) inner resecting sleeve wherein such reciprocation moves the probe between window-open and window-closed positions at a reciprocation speed; and a motor drive in the handle, and an actuator coupled to the motor drive and rotatable therewith, the actuator configured to convert rotational motion from the motor drive to reciprocation motion of the inner resecting sleeve for reciprocating the inner resecting sleeve across a window of the outer sleeve between the window-open position and the window-closed position, the actuator including an arcuate slot shaped to vary a reciprocation speed of the inner resecting sleeve such that the reciprocation speed of the reciprocating inner resecting sleeve is variable within one complete reciprocation stroke, wherein the complete reciprocation stroke includes an extending stroke in which the inner resecting sleeve moves from the window-open position to the window-closed position and a retracting stroke in which the inner resecting sleeve moves from the window-closed position to the window-open position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A tissue resecting probe comprising:
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a handle; an elongate shaft extending from the handle, the elongate shaft including; an outer sleeve having a tissue-receiving window; and an inner sleeve disposed in the outer sleeve; a motor drive in the handle; an actuator in the handle coupled between the motor drive and a pin fixed relative to the inner sleeve to convert rotational motion from the motor drive to reciprocation motion of the inner sleeve relative to the outer sleeve; wherein the actuator includes an arcuate slot engaging the pin; wherein the arcuate slot is configured to provide a variable reciprocation speed of the inner sleeve within a full reciprocation stroke; wherein the full reciprocation stroke includes an extending stroke in which the inner sleeve moves from a window-open position to a window-closed position and a retracting stroke in which the inner sleeve moves from the window-closed position to the window-open position.
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Specification