Patent ID: 9566046
Date: 2017-02-14
CPC Classifications: A61B,A61L,Y10T

Claim:
1. A needle for collecting a sample of a target tissue in a patient, the needle comprising: a hollow cannula comprising a first material and 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 cannula having an inner surface provided with at least one inner surface feature that creates a discontinuity, the inner surface feature being for engaging with the target tissue and for retaining the sample during withdrawal of the cannula from the patient; and a stylet having a substantially solid shaft, a proximal end, an opposing distal end, the solid shaft being dimensioned to be removably received within the cannula; the distal end of the stylet being configured to pierce the target tissue; wherein the solid shaft comprises a second material having a radiopacity lower than the radiopacity of stainless steel, such that an appearance of the solid shaft generated by a CT imaging apparatus resents 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.