Surgery – Truss – Perineal
Patent
1974-04-08
1976-03-02
Pace, Channing L.
Surgery
Truss
Perineal
A61H 2300, A61B 1700
Patent
active
039411222
ABSTRACT:
The present disclosure deals with ultrasonically selectively dissolving solid and semi-solid unwanted materials, such as vitreous gels, membranes, cataracts and similar materials in ophthalmic operation applications, for example, by radiating from a physically small source, high-frequency, preferably pulsed, acoustic waves, while positioning the material to be selectively locally dissolved by such waves at a selected region sometimes in contact with or near-contact or within a short distance from the source of the order of a millimeter or so, at which the propagated acoustic wave energy can effect such phenomena as, for example, localized cytolysis of the material at the selected region thereof substantially normal to the wavefront of the radiated acoustic wave region, and without substantial damage to the portions of the material external to said selected region, and with adjustment to obviate any substantial temperature rise at the material.
REFERENCES:
patent: 3565062 (1971-02-01), Kuris
patent: 3589363 (1971-06-01), Banko et al.
patent: 3721227 (1973-03-01), Larson et al.
baum, Gilbert et al., "The Application of Ultrasonic Locating Techniques to Ophthalmology", IN Am. Jour. Ophth. 465, Part II; 319-329: Nov. 1958.
Bolt Beranek and Newman Inc.
Pace Channing L.
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