A method for extracting a tissue sample includes altering the pressure inside the lumen of a cannula to facilitate extraction of a tissue sample from the cannula. One aspect of the invention includes a biopsy apparatus comprising a valve for controlling the pressure inside the lumen of the cannula. In one variation, the pressure/vacuum generating device is connected to a cannula with a closed distal end and an orifice located on a circumferential surface of said cannula. A cutting sheath is slidably disposed over said cannula. The valve may be provided between the pressure/vacuum generating device and the cannula to control the pressure within the lumen of the cannula.
申请公布号
WO2006083770(A2)
申请公布日期
2006.08.10
申请号
WO2006US03232
申请日期
2006.01.30
申请人
C. R. BARD, INC.;MCCULLOUGH, ADAM, B.;KALIS, ROBERT, W.