Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1997-01-16
1998-10-20
Mendez, Manuel
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
606167, 606180, A61B 1722
Patent
active
058239901
ABSTRACT:
An ultrasonic avulsing liposuction handpiece including a handle portion and a cannula portion. In one embodiment, the cannula portion includes an auger rotatably mounted within an apertured outer tube. An independently controllable source of vibration housed within the handpiece causes the auger to vibrate at a desired frequency as the auger rotates. A portion of the rotary auger underlying an aperture in the wall of the outer tube includes a helical flange which has an elastically deformable outer tissue-contacting edge. When the outer tube is inserted within fatty tissue, the tissue-contacting edge avulses or tears apart fatty tissue protruding inwardly through the aperture in the outer tube when the auger is rotating. The mechanical vibration imparted to shaft of the rotating auger enhances the mechanical transport of avulsed tissue to a vacuum aspirator port within the handpiece for removal. The handpiece is relatively easy to use, rendering the procedure less tiring for the surgeon. In all embodiments incorporating vibration, the tissue-removing element vibrates at an ultrasonic or sonic frequency within the protective confines of the outer tube thereby reducing loading and heating. In the avulsing auger embodiment, the rotating auger vibrates within the outer tube, imparting a complex, wobbly, vibrorotatory wavelike motion to the tissue-contacting edge of the auger providing improved performance for suction lipectomy procedures.
REFERENCES:
patent: 5275607 (1994-01-01), Lo et al.
patent: 5441510 (1995-08-01), Simpson et al.
patent: 5514115 (1996-05-01), Frantzen et al.
Mendez Manuel
Petit Michael G.
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