Patent ID: 8728006

Claim:
A method for obtaining a tissue biopsy specimen, the method which comprises the following steps: inserting a trocar into a carrier; inserting the carrier with the trocar percutaneously to a biopsy site; removing the trocar from the carrier; inserting a biopsy needle into the carrier, the 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; and removing the tissue biopsy specimen with the biopsy needle, the removing step including moving the door about the hinge location from a normally open position during percutaneous insertion, to a rotated and closed position occluding the lumen and capturing the tissue biopsy specimen for removal.