Patent ID: 8753288
Filing Date: 2014-06-17
Classification: A61B,A61M

Abstract:
1. A biopsy needle, comprising: an outer tube slidably defining a first lumen extending therethrough; a longitudinal body including a first portion received within the outer tube and a second portion extending distally therefrom to a tissue penetrating distal tip, the longitudinal body defining a second lumen extending therethrough to a distal opening in the distal tip, an outer diameter of the longitudinal body being selected to create an annular space between the longitudinal body and an inner surface of the outer tube; a filter formed on the second portion and permitting fluid communication between the second lumen and the annular space, the filter being configured to prevent sampled tissue from passing therethrough; and a stylet slidably received in the second lumen for movement between an insertion position in which a distal end of the stylet seals the distal opening and a sampling position in which the stylet is moved proximally relative to the longitudinal body to open the second lumen to receive tissue therein, the stylet being movable to a filtering position in which the stylet is positioned proximally of the second portion of the longitudinal body so that fluid may flow from the distal end of the second lumen through the filter to the annular space.