Patent ID: 7455645
Filing Date: 2008-11-25
Classification: A61B

Abstract:
1. A biopsy needle for removal of tissue from a patient comprising: an outer tube having a distal end; an inner tube disposed within said outer tube, the inner tube having a first section that includes a proximal end thereof, a second section that includes an actuatable snare, and a third section that includes a distal end thereof, the third section being coupled to the outer tube, wherein the snare has a variable diameter that is controlled by rotation of the inner tube with respect to the outer tube in a prescribed direction resulting in the opening and closing, respectively, of the snare, the distal end of the third section of the inner tube extending beyond the distal end of the outer tube such that the distal end of the inner tube represents a distal tip of the needle, wherein the snare coil has an inner diameter (ID sc ) and the third section at the distal tip has an liner diameter (ID tip ) and a ratio (R)=(ID sc )/(ID tip ) is greater than 1.