| 摘要 |
A medical device includes an elongate body extending from a proximal portion which, in an operative configuration, remains outside a living body, to a distal end which, in the operative configuration, extends through a body to a position adjacent to a target portion of tissue to be treated and a spool rotatably coupled to the distal portion of the elongate body, the spool including a distal portion coupled to an end effector of the device along with a flexible member extending from the proximal portion of the elongate body, a first portion of the flexible member being wound about the spool in a first direction and a second portion of the flexible member wound about the spool in a second direction opposite the first direction, ends of the first and second portions extending to the proximal portion of the elongate body.
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