Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-01-19
1998-08-25
Brown, Michael A.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604171, A61M 5178
Patent
active
057978832
ABSTRACT:
A device for sampling biological materials having a tube having a front segment and rear segment, wherein the outer diameter of the front segment is smaller than the outer diameter of the rear segment. The inner diameter of the front segment is smaller than the inner diameter of the rear segment. The front segment has a distal opening. A rod having a piston having an outer diameter substantially equal to the inner diameter of the rear segment, wherein the rod is engaged within the tube, the piston is positioned within the rear segment, such that when the rod is partially withdrawn from the tube, a negative pressure is created in the front segment that is greater than the negative pressure created within part of the rear segment by the partial withdrawal of the rod, thereby enabling the sampling of the biological materials through the distal opening.
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patent: 3088454 (1963-05-01), Shute
patent: 4529399 (1985-07-01), Groshong
patent: 4757827 (1988-07-01), Buchbinder
patent: 4808158 (1989-02-01), Kreuzer
patent: 5069224 (1991-12-01), Zinnanti, Jr.
patent: 5183470 (1993-02-01), Wettermann
patent: 5242418 (1993-09-01), Weinstein
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