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US 7,727,164 B2Granted
Method for operating a biopsy device
AssigneeEthicon Endo-Surgery, Inc.
InventorsChris Cicenas, Luke Stonis
Life of this patent
Estimating the term…
Abstract
A biopsy device is provided. The biopsy device can include a cutter which is advanced through a first portion of its stroke by a differential fluid pressure acting on a piston. A mechanical drive can be used to translate and rotate the cutter during tissue severing.
Claims7
A method for operating a biopsy device comprising the steps of:
- providing a hollow biopsy needle having a tissue receiving port;
- providing a cutter for severing tissue;
- drawing tissue into the tissue receiving port;
- providing a pressure differential;
- advancing the cutter within the biopsy needle using the pressure differential to a first position proximal of the tissue receiving port without rotating the cutter;
- advancing the cutter to a position distal of the receiving port without using the pressure differential to advance the cutter while simultaneously rotating the cutter;
- stopping advancement of the cutter at a position distal of the receiving port;
- and
- rotating the cutter at a position distal of the receiving port after stopping advancement of the cutter.
6 more elements
A method for operating a biopsy device comprising the steps of:
- providing a hollow biopsy needle having a tissue receiving port;
- providing a cutter for severing tissue;
- drawing tissue into the tissue receiving port;
- providing a pressure differential;
- advancing the cutter within the biopsy needle using the pressure differential at a first speed to a first position proximal of the tissue receiving port without rotating the cutter;
- rotating the cutter while advancing the cutter to a position distal of the receiving port at a second speed different from the first speed.
3 more elements
A method for operating a biopsy device comprising the steps of:
- providing a hollow biopsy needle having a tissue receiving port;
- providing a cutter for severing tissue;
- drawing tissue into the tissue receiving port;
- providing a pressure differential;
- advancing the cutter within the biopsy needle using the pressure differential to a first position proximal of the tissue receiving port without rotating the cutter;
- advancing the cutter to a position distal of the receiving port without using the pressure differential to advance the cutter;
- rotating the cutter while advancing the cutter to the position distal of the receiving port;
- and
- continuing to rotate the cutter after the cutter reaches a distal most position with respect to the tissue receiving port.
6 more elements
Dependencies are inferred from the claim text.