Bone marrow biopsy needle

Overview

Information

Number: 6063037
Application: 09/137854
Filing date: 08/21/1998
Issue date: 05/16/2000
Inventor(s): Manfred Mittermeier, Alan M. Hable

US Classification: 600/567

Citations

NA (5)

Number	Title	Issue Date
4651752	Biopsy needle	1987/03/24
4785826	Biopsy instrument	1988/11/22
5074311	Biopsy device	1991/12/24
5148813	Biopsy instrument with tissue specimen retaining and retrieval device	1992/09/22
5333619	Method for rigid tissue biopsy	1994/08/02

MANAN ACQUISITION (3)

Number	Title	Issue Date
4403617	Biopsy needle	1983/09/13
4630616	Bone marrow needle	1986/12/23
4838282	Bone biopsy needle assembly	1989/06/13

INTERNATIONAL MEDICAL TECHNOLOGIES (2)

Number	Title	Issue Date
5462062	Bone marrow biopsy needle with cutting and/or retaining device at distal end	1995/10/31
5595186	Bone marrow biopsy needle	1997/01/21

Linvatec (1)

Number	Title	Issue Date
5286255	Surgical forceps	1994/02/15

BETHELL, JOHN P. (1)

Number	Title	Issue Date
5357974	Bone marrow biopsy instrument	1994/10/25

Peter F. Lee (1)

Number	Title	Issue Date
4655226	Disposable biopsy needle unit	1987/04/07

C.R. Bard (1)

Number	Title	Issue Date
5172700	Disposable biopsy forceps	1992/12/22

Medsol, (1)

Number	Title	Issue Date
5634473	Bone marrow biopsy needle	1997/06/03

Microsurge (1)

Number	Title	Issue Date
5318589	Surgical instrument for endoscopic surgery	1994/06/07

Abstract

Abstract

The present invention is directed to a biopsy needle for extracting bone marrow from a living bone. The biopsy needle comprises an outer cannula, an inner cannula slidable therein, an obturator and an ejector rod. The outer cannula has a proximal end, affixed to a handle, and a distal end which has a tapered inner diameter. The inner cannula likewise has a proximal end, affixed to an interlocking handle, and a distal end. The inner cannula distal ends consists of a tissue receiving region and a tissue grasping mechanism. The tissue grasping mechanism comprises a resilient deformable wall with an asymmetric configuration, preferably, two opposing slits, and a structure-maintaining spanning member. The tissue grasping member is which are deformed and at least partially closed upon insertion into the tapered region of the outer cannula. In operation, this deformation severs a tissue sample into the receiving region of the inner cannula, which may then be withdrawn from a patient. A spring biased ejector rod displaces the sample from the inner cannula, while also reforming the tissue grasping portion of the inner cannula to its original pre-biopsy shape. The obturator may be used in combination with the outer cannula for initial insertion of the needle into the patient.

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Referenced by

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Tech Analysis

Class	Subclass	Type	Reference Factor	Citation Factor	Strength	Grant time	Early grant (%)
600	567	Stable	Average	Average	Medium	Average	27.0