Abstract: A Magnetic Resonance Imaging (MRI) compatible core biopsy instrument includes a detachable probe assembly to enhance the accuracy of placement at a biopsy site and avoid repeated insertions, even when used in a closed MRI magnet bore. In particular, the detachable probe assembly is configured for attachment to a localization fixture for accurate stereotopic placement to the desired biopsy site. While disengaged, dual lumens (vacuum and cutter) of the probe assembly allow applying vacuum to, draining fluid from, and insertion of fluids to the biopsy site. The biopsy instrument handle readily engages to the probe assembly for taking samples. Features are included for visual indications of the position of the cutter, prevention of disengagement when the cutter is advanced into the probe assembly, and a tolerance take-out feature that minimizes the deadzone gap at a distal end of the probe assembly, allowing samples to be taken close to sensitive tissues.

Abstract: A biopsy device comprises a probe assembly and an obturator. The probe assembly comprises a cannula having a closed distal end configured to penetrate tissue, an open proximal end, a first lumen in fluid communication with the open proximal end, and a side aperture located proximal to the closed distal end. The side aperture is in fluid communication with the first lumen. The obturator is removably insertable in the first lumen through the open proximal end. The obturator is configured to substantially block the side aperture when the obturator is inserted in the first lumen. The probe assembly may be inserted in a patient's tissue (e.g., breast) with the obturator disposed in the cannula to block the side aperture. The obturator may then be removed, and a cutter may be advanced through the cannula to sever tissue protruding through the side aperture.

Abstract: A Magnetic Resonance Imaging (MRI) compatible core biopsy instrument includes a detachable probe assembly to enhance the accuracy of placement at a biopsy site and avoid repeated insertions, even when used in a closed MRI magnet bore. In particular, the detachable probe assembly is configured for attachment to a localization fixture for accurate stereotopic placement to the desired biopsy site. While disengaged, dual lumens (vacuum and cutter) of the probe assembly allow applying vacuum to, draining fluid from, and insertion of fluids to the biopsy site. The biopsy instrument handle readily engages to the probe assembly for taking samples. Features are included for visual indications of the position of the cutter, prevention of disengagement when the cutter is advanced into the probe assembly, and a tolerance take-out feature that minimizes the deadzone gap at a distal end of the probe assembly, allowing samples to be taken close to sensitive tissues.