Air-powered tissue aspiration instrument with...

Surgery – Means or method for facilitating removal of non therapeutic... – Liposuction

Reexamination Certificate

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Details

C604S902000, C604S022000, C606S171000, C606S039000, C606S048000

Reexamination Certificate

active

06872199

ABSTRACT:
A method and apparatus is disclosed for mechanically-assisted liposuction treatment. The apparatus includes a hand-holdable housing, an electro-cauterizing cannula assembly, and a reciprocation mechanism. The hand-holdable housing has a cavity adaptable for receipt of a portion of the electro-cauterizing cannula assembly. The electro-cauterizing cannula assembly has a distal end and a proximal end and at least one aspiration aperture about the distal end. The reciprocation mechanism is disposed within the housing and is operably associated with either the cannula so that the cannulas can be selectively caused to reciprocate relative to the housing. As the cannula is caused to reciprocate relative to the housing, the aspiration aperture formed through the distal end of the cannula assembly is caused to undergo periodic displacement. During aspiration of tissue, high-voltage RF power signal supplied to an electro-cauterizing electrode structure formed about each reciprocating aspiration aperture to effect hemostasis thereabout. Such hemostasis is achieved by causing protein molecules within aspirated tissue to coagulate in response to the high-voltage RF signal being supplied across the electro-cauterizing electrode. In the preferred embodiments, the amount and rate of such aspiration aperture displacement is controllably adjustable. The cannula assembly is releasably detachable from the hand-holdable housing to facilitate cleaning and sterilization of the cannula assembly and the housing.

REFERENCES:
patent: 3699968 (1972-10-01), Bolduc
patent: 3994297 (1976-11-01), Kopf
patent: 4314560 (1982-02-01), Helfgott et al.
patent: 4674502 (1987-06-01), Imonti
patent: 4986827 (1991-01-01), Akkas et al.
patent: 5352194 (1994-10-01), Greco et al.
patent: 5911700 (1999-06-01), Mozsary et al.
patent: 6102885 (2000-08-01), Bass
patent: 6346107 (2002-02-01), Cucin
patent: 6394973 (2002-05-01), Cucin
patent: 6652522 (2003-11-01), Cucin

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