Biopsy needle

• US 5,807,275 A
• Filed: 07/19/1995
• Issued: 09/15/1998
• Est. Priority Date: 07/19/1995
• Status: Expired due to Fees

• Current Assignee: Medical Biopsy, Inc.
• Original Assignee: Medical Biopsy, Inc.
• Inventors: Jamshidi, Khosrow
• Primary Examiner(s): Hindenburg, Max
• Assistant Examiner(s): WINGOOD, PAMELA LYNN
• Application Number:
  US08/504,193
• Time in Patent Office: 1,154 Days
• Field of Search: 128/751, 128/753, 128/754, 606/167, 606/170
• US Class Current: 600/567
• CPC Class Codes: A61B 10/025 for taking bone, bone marrow or cartilage samples
• CPC Class Codes: A61B 2017/00424 ergonomic, e.g. fitting in fist
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603

Abstract

A biopsy needle assembly and kit for acquiring a sample of tissue and method of using the same. The biopsy needle assembly includes a needle having a lumen extending therethrough and a stylet sized to extend through the lumen. A divided ergonomically shaped handle has a distal part formed around the proximal end of the needle and a proximal part formed around the proximal end of the stylet. These parts can be locked together, but only from a single right angle initial orientation with a rotation in one direction only from there to lock the two parts together. A stop ensures locked alignment. Locking the handle parts in alignment provides a known orientation between the distal ends of the needle and stylet. A Luer connector attached to the proximal end of the distal handle part is exposed only when the handle parts are disconnected for connecting either a plug or aspiration apparatus.

Claims

1. A biopsy needle assembly, comprising:

(a) an elongated needle having a proximal end and a distal end, and having a lumen extending between said proximal end and said distal end;

(b) an elongated stylet having a proximal end and a distal end;

(c) a handle of a predetermined shape divided into two parts, having a proximal handle part with a distal surface formed around the proximal end of said stylet, and having a distal handle part with a proximal surface formed around said needle near the proximal end thereof, said stylet being removably positionable within said needle lumen through said distal handle part;

(d) locking apparatus formed from, and integral with, said proximal handle part arranged to attach and lock said proximal handle part to said distal handle part with said stylet positioned within said lumen, with said distal surface of said proximal handle part adjacent to said proximal surface of said distal handle part, and such that said handle parts can be rotated into alignment with each other, said locking apparatus comprising an extension from the proximal surface of said distal handle part around the proximal end of said needle, and a mating recess in the distal surface of said proximal handle part, said extension being generally cylindrical in shape with an axis coaxial with said needle lumen, said extension having opposed flanges of unequal annular widths extending radially outwardly therefrom generally perpendicular to said axis, said flanges each being a predetermined distance from a proximal end of said extension, said recess being generally cylindrical in shape with an axis generally aligned with said stylet, said recess having opposed unequal width wings extending outwardly therefrom generally perpendicular to said axis, said wings being sized and arranged such as to receive said flanges but only when said extension is inserted into said recess with said handle parts at a predetermined angle relationship with respect to one another, said recess further having opposed slots extending outwardly therefrom and generally perpendicular to the recess cylindrical axis, said slots each having an entrance end from an adjacent wing and an opposite terminal end approximately one quarter of the recess circumference therefrom, said slots having a size and path such that when said extension is inserted into said recess with said handle parts at said predetermined angle relationship with respect to one another, each flange will be opposite an adjoining slot and each flange can enter and traverse the adjoining slot as said handle parts are rotated in a predetermined direction of rotation into alignment; and

(e) a male connector attached to a proximal side of said extension around the proximal end of said needle, said recess being sized to also accept said connector.

2. A biopsy needle assembly, comprising:

(a) an elongated needle having a proximal end and a distal end, and having a lumen extending between said proximal end and said distal end;

(b) an elongated stylet having a proximal end and a distal end;

(c) a handle of a predetermined shape divided into two parts, having a proximal handle part with a distal surface formed around the proximal end of said stylet, and having a distal handle part with a proximal surface formed around said needle near the proximal end thereof, said stylet being removably positionable within said needle lumen through said distal handle part;

(d) locking apparatus formed from, and integral with, said proximal handle part arranged to attach and lock said proximal handle part to said distal handle part with said stylet positioned within said lumen, with said distal surface of said proximal handle part adjacent to said proximal surface of said distal handle part, and such that said handle parts can be rotated into alignment with each other, said locking apparatus comprising an extension from the proximal surface of said distal handle part around the proximal end of said needle, and a mating recess in the distal surface of said proximal handle part;

(e) stop apparatus formed from, and integral with, said handle parts comprising as least one stud projecting from the distal surface of said proximal handle part and an opposing arcuate groove having an entrance end and a terminus end, said stud and said groove being arranged such that when said extension is positioned within said recess in a predetermined angle relationship and said handles rotated in a predetermined direction, said stud will engage and mate with said groove until said stud reaches the terminus end of said groove; and

(f) a male connector attached to a proximal side of said extension around the proximal end of said needle, said recess being sized to also accept said connector.