Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1991-03-08
1992-10-13
Shay, David M.
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
604 27, 604 35, 606107, 606169, 606171, A61B 1732
Patent
active
051546949
ABSTRACT:
Tissue scraper element for medical use in extracting undesired body tissue, e.g. a natural eye lens, by mechanical vibratory contact to disintegrate the tissue and by accompanying flushing fluid flow removal of the disintegrated tissue from the tissue site, the element including a longitudinal shank whose base end in use is mounted on a hand held instrument for longitudinal back and forth vibratory movement, and whose free end terminates in a tip extending crosswise of the shank longitudinal axis. The shank has an internal flow passage, and the tip terminates in a laterally outwardly directed scraper edge and has an internal flow channel communicating the shank passage with a mouth adjacent the scraper edge. Upon contacting the scraper edge against the undesired tissue in a direction crosswise of the shaft longitudinal axis, while subjecting the shank and tip to such vibratory movement and accompanying flushing fluid flow via the tip mouth, the tissue will be disintegrated and removed.
REFERENCES:
patent: 3589363 (1971-06-01), Banko et al.
patent: 3794040 (1974-02-01), Balamuth
patent: 4136700 (1979-01-01), Broadwin et al.
patent: 4301802 (1981-11-01), Poler
patent: 4674500 (1987-06-01), DeSatnick
patent: 4750488 (1988-06-01), Wuchinich
patent: 4832683 (1989-05-01), Idemoto et al.
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