Patent ID: 8728005

Claim:
A biopsy needle system, comprising: a carrier; a trocar to be inserted into said carrier for percutaneous insertion to a biopsy site; a biopsy needle to be inserted into said carrier, replacing said trocar, for removal of a tissue biopsy specimen; and said biopsy needle, including: a one-piece body having a distal end defining a biopsy needle lumen, said distal end having a distal edge tissue cutting entrance of said one-piece body with a cross-sectional shape having a flat side extended transversely to a longitudinal axis of the biopsy needle and at least one converging side forming a shape selected from the group consisting of semicircular, elliptical, oval, rounded trapezoidal, paraboloid and triangular; a door disposed at said lumen, said door having a flat portion fitting said flat side of said distal edge tissue cutting entrance and at least one converging portion fitting said at least one converging side of said distal edge tissue cutting entrance; a hinge location inside said lumen of said one-piece body at said flat side of said distal edge tissue cutting entrance; and a hinge disposed at said hinge location; said door being moveable freely back and forth about said hinge, and said door being moveable about said hinge merely due to percutaneous insertion and percutaneous withdrawal of the needle, from a normally open position during percutaneous insertion, to a rotated and closed position totally occluding said lumen between said sides and said portions and automatically capturing a tissue biopsy specimen for removal.