Disposable biopsy devices and methods of obtaining tissue biopsy samples using same

摘要

The described invention provides a disposable handheld biopsy device for taking biopsies, the biopsy device comprising a tissue cutting assembly which has features to control the tissue length that will be severed by the cutting assembly; and a vacuum assembly which has features to control the vacuum level. The disposable handheld biopsy device of the described invention is simple, lightweight, portable, and cost effective to manufacture and dispose of.

主权项

1. A disposable biopsy device comprising:
A. a tissue cutting assembly comprising: an outer needle including a tissue receiving slot at a distal end of the outer needle; an elongated tube; an inner cutter needle including a tissue receiving port at a distal end of the inner cutter needle; a first plunger; and a first stopper; wherein (i) the outer needle is attached to a distal end of the tube; (ii) the inner cutter needle is attached to a distal end of the first plunger; (iii) the inner cutter needle and the first plunger are coaxially positioned within the tube and capable of rotating about and translating along the longitudinal axis of the tube; (iv) the inner cutter needle is coaxially positioned within the outer needle and capable of rotating about and translating along the longitudinal axis of the outer needle; and (v) the first stopper is attached to or connected to a proximal end of the tube; and B. a vacuum assembly comprising: an elongated cylinder; a second plunger; and a second stopper; wherein (i) the second plunger is coaxially disposed within the cylinder and capable of rotating about and translating along the longitudinal axis of the cylinder; and (ii) the second stopper is attached to or connected to a proximal end of the cylinder; wherein the vacuum assembly and the cutting assembly are two separate compartments in fluid communication through one or more air holes in between.