Biopsy device with variable side aperture

摘要

A biopsy device and method are provided for obtaining a tissue sample, such as a breast tissue biopsy sample. The biopsy device may include an outer cannula having a distal piercing tip, a cutter lumen, a side tissue port communicating with the cutter lumen, and at least one fluid passageway disposed distally of the side tissue port. The inner cutter may be advanced in the cutter lumen past the side tissue port to sever a tissue sample. After the tissue sample is severed, and before the inner cutter is retracted proximally of the side tissue port, the cutter may be used to alternately cover and uncover the fluid passageway disposed distally of the side tissue.

主权项

1. A method for obtaining a tissue sample with a biopsy device, wherein the biopsy device comprises a probe portion, wherein the probe portion comprises a cannula and a cutter, wherein the cannula comprises a first lumen, a second lumen, and a lateral tissue receiving feature in communication with the first lumen, wherein the cutter is moveable within the first lumen, wherein the method comprises the steps of:
(a) actuating the cutter to a first proximal position within the first lumen of the cannula such that at least a portion of the lateral tissue receiving feature is blocked by the cutter, to thereby provide a partially blocked lateral tissue receiving feature; (b) applying a vacuum to the second lumen to prolapse tissue through the lateral tissue receiving feature after the at least a portion of the lateral tissue receiving feature is blocked; and (c) actuating the cutter from the first proximal position to a distal position within the first lumen of the cannula to sever the prolapsed tissue within the partially blocked lateral tissue receiving feature.