Patent ID: 7792569
Filing Date: 2010-09-07
Classification: A61B,A61K,A61M

Abstract:
1. A bolus of biopsy marker powder which is ultrasonically detectable in-vivo within a patient's biopsy site for a period of at least two weeks but not longer than six months, which comprises a comminuted bio-resorbable polymeric powdered material selected from the group consisting of polylactic acid, polyglycolic acid, polycaproic acid, polybutyric acid, polyvaleric acid, and copolymers, polymer alloys, polymer mixtures, and combinations thereof, at least 80% of the comminuted powder having particles with a particle size of about 300 to about 800 microns and the particles of the comminuted powder having one or more bubble cavities within the particles smaller than the particle size of the particles and about 50 to about 200 microns in size.