Tissue resecting systems and methods
AssigneeBoston Scientific Scimed, Inc.
InventorsRobin Bek, Aaron Germain
Life of this patent
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Abstract
A tissue resecting system includes an assembly having first and second tubular members. An electrical motor drive and controller moves the second member to resect tissue received in a window of the first member. A tachometer sends motor drive rotational signals to the controller, and the controller modulates a motor voltage in response to the signals from the tachometer both to drive the second member at a predetermined speed and to calculate resistance to driving the second member at the predetermined speed.
Claims19
A method of controlling a tissue resecting device, comprising:
- moving an inner sleeve of the tissue resecting device across a tissue-receiving window of an outer sleeve of the tissue resecting device to resect tissue extending into the tissue-receiving window;
- extracting the resected tissue proximally through an extraction lumen of the inner sleeve;
- using a controller to evaluate a calculated resistance of moving the inner sleeve relative to the outer sleeve to de-energize a motor of the tissue resecting device at a selected position to permit momentum to move the inner sleeve to a partly window-open position;
- thereafter, stopping the inner sleeve relative to the outer sleeve in the partly window-open position with the distal edge of the inner sleeve positioned across the tissue-receiving window;
- and
- aspirating fluid through the extraction lumen with the inner sleeve stopped in the partly window-open position.
A method of controlling a tissue resecting device, comprising:
- moving a first polarity electrode at a distal end of an inner sleeve of the tissue resecting device across a tissue-receiving window of an outer sleeve of the tissue resecting device while an electrical current passes between the first polarity electrode and a second polarity electrode on the outer sleeve to resect tissue extending into the tissue-receiving window;
- extracting the resected tissue proximally through an extraction lumen of the inner sleeve;
- thereafter, stopping the inner sleeve relative to the outer sleeve in a partly window-open position with the first polarity electrode positioned across the tissue-receiving window;
- and
- coagulating tissue by applying an electrical current between the first polarity electrode and the second polarity electrode with the inner sleeve stopped in the partly window-open position.
Dependencies are inferred from the claim text.