Patent ID: 7693567
Filing Date: 2010-04-06
Classification: A61B

Abstract:
1. An apparatus for use with a minimally invasive medical procedure into human breast tissue, the apparatus comprising: a cannula formed of a magnetic resonance imaging (MRI) compatible material and including an open proximal end, an open distal end, and a lateral aperture positioned proximal to the open distal end, wherein the cannula defines a cannula lumen extending between the open proximal end and the open distal end, wherein the lateral aperture is in communication with the cannula lumen; an obturator comprising a hollow shaft formed of MRI compatible material and sized for insertion into the cannula lumen and including a lateral notch positioned to align with the lateral aperture of the cannula, wherein the obturator has a tissue piercing tip configured to protrude through the open distal end of the cannula; a marker lumen formed in the obturator communicating between a proximal portion of the obturator external to the human breast tissue and the lateral aperture of the cannula, wherein the marker lumen is in fluid communication with the lateral notch; and a substantially non-imageable insert with fluid leak passages positioned in the marker lumen.