Bone marrow extraction tool

Details Bone marrow extraction tool Bone marrow extraction tool

2001-08-01

2004-06-29

Hindenburg, Max F. (Department: 3736)

Surgery

Diagnostic testing

Sampling nonliquid body material

Reexamination Certificate

active

06755793

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to a bone marrow extraction tool. More specifically, the invention relates to such a tool having means to separate the marrow sample from the marrow mass while the distal end of the tool is buried in the mass.
BACKGROUND OF THE INVENTION
There has been a need in bone marrow biopsy tools for improved means for severing the biopsy sample from the marrow mass. The prior art U.S. Pat. No. 5,807,277 to Swaim discloses relative rotation of inner and outer cannulas to cut off the sample, each cannula having a curving beveled nose. The present invention makes such relative rotation unnecessary.
SUMMARY OF THE INVENTION
The invention is a bone marrow extraction tool which comprises an outer cannula having an interiorly and exteriorly tapered marrow-receiving open distal end, and an inner cannula slidably disposed in the outer cannula and having a distal end formed with longitudinal slots. The slots define resilient sectors. The mouth of the inner cannula is adapted, when forcibly engaging the interior taper of the outer cannula to diminish in diameter as the sectors flex inward. The ends of the sectors compress marrow disposed in the mouth and squeeze it off from the marrow mass outside the outer cannula.


REFERENCES:
patent: 4785826 (1988-09-01), Ward
patent: 5357974 (1994-10-01), Baldridge
patent: 6063037 (2000-05-01), Mittermeier et al.
patent: 200 10 879 (2000-10-01), None
patent: 0 852 127 (1998-07-01), None
patent: WO96/27330 (1996-09-01), None

Affiliated with

Also associated with

Rating

Bone marrow extraction tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bone marrow extraction tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bone marrow extraction tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3365562