Patent ID: 9375203
Filing Date: 2016-06-28
CPC Classification: A61B,A61L,Y10T

Claim Text:
1. A needle for collecting a sample of a target tissue in a patient, comprising: a hollow cannula comprising a first material and configured to removably receive a stylet therein for insertion of the needle into the patient; the cannula having an open proximal end, an opposing open distal end, and a lumen extending between the open proximal end and the open distal end; the lumen defining an inner surface; the inner surface having at least one inner surface feature adjacent to the open distal end for engaging with the target tissue after removal of the stylet, and for retaining the sample during withdrawal of the cannula from the patient; the at least one inner surface feature providing a discontinuity on the inner surface; and wherein the stylet has a substantially solid shaft with a proximal end and an opposing distal end, the solid shaft dimensioned to be received within the cannula; the distal end of the stylet being configured to pierce the target tissue; and the solid shaft comprising a second material having a radiopacity lower than the radiopacity of stainless steel, such that an appearance of the solid shaft generated by the CT imaging apparatus presents reduced imaging artifacts; and wherein the solid shaft further comprises at least one particle of a third material embedded in the second material for defining an interface between the second material and the third material.