Patent ID: 8986222
Filing Date: 2015-03-24
Classification: A61B

Abstract:
1. A tissue biopsy device, comprising: a housing; an outer cannula having an open proximal end, a closed distal end, a tissue receiving opening formed in a wall thereof adjacent the closed distal end, a cutting board disposed in the outer cannula between the tissue receiving opening and the closed distal end, and an outer cannula lumen extending between the open proximal end and the cutting board; an inner cannula slidably disposed within the outer cannula lumen, the inner cannula having an open distal end and an inner cannula lumen; and a hub coupled to the outer cannula adjacent the open proximal end thereof, the hub further coupled to the housing, thereby coupling the outer cannula to the housing, wherein the hub and the housing define an unobstructed leak path therebetween, such that the open proximal end of the outer cannula, and thereby the outer cannula lumen and tissue receiving opening, are in constant fluid communication with atmosphere external of the housing via the unobstructed leak path, regardless of a position of the inner cannula relative to the cutting board.