Patent ID: 8920338

Claim:
A method of obtaining a tissue sample, comprising: positioning a sampling portion of a biopsy device proximate target tissue, wherein the sampling portion is configured to receive and sever tissue, the sampling portion extending along a longitudinal axis; moving the sampling portion from a closed position to an open position by moving a moveable member relative to a stationary member, the moveable member having a sharp edge, a hollow channel therein, a plurality of orifices in fluid communication with the hollow channel, and a tip portion configured to pierce tissue, wherein in the open position at least two of the plurality of orifices are offset on either side of a central longitudinal axis of the moveable member, wherein in the open position, the moveable member is configured to be received by and nest within the stationary member, wherein the moveable member includes a cross-sectional shape of a partial circle complimentary to a partial circle cross-sectional shape of the stationary member; receiving tissue within the moveable member; and applying a pressure differential in the sampling portion via a pressure differential system, the pressure differential system being configured to form a pressure differential in the sampling portion when the sampling portion is in the open position, wherein the pressure differential system is in fluid communication with the hollow channel and the plurality of orifices of the moveable member.