Non-invasive methods and apparatus for in vivo measurement of in

Details Non-invasive methods and apparatus for in vivo measurement of in Non-invasive methods and apparatus for in vivo measurement of in

1996-08-01

1999-03-09

Yu, Mickey

Surgery

Miscellaneous

Methods

600455, 600462, A61B 1900

Patent

active

058787496

ABSTRACT:
A method for evaluating a varix, including the steps of: (a) placing a system for observing whether the varix is open or closed into a region adjacent to the varix; (b) placing a system for sensing pressure into a region adjacent to the varix; (c)temporarily increasing the pressure in the region adjacent to the varix so that the varix collapses; (d) simultaneously observing the varix with the observing system and monitoring the pressure in the region adjacent to the varix with the pressure sensing system when the varix closes or reopens. Also, a device for evaluating a varix, including: (a) a system for observing whether the varix is open and generating an observing system output; and (b) a system for sensing the pressure in the region adjacent to the varix and generating a pressure sensing output.

REFERENCES:
patent: 4582067 (1986-04-01), Silverstein et al.
patent: 4770185 (1988-09-01), Silverstein et al.
Miller, et al., "Simultaneous High-Frequency Esophageal Ultrasound and Maetry in Normal Volunteers," Gastroenterology, vol. 103, p. A147 (Apr., 1993).
Nevens et al. "Measurement of variceal pressure and its clinical implications." Scand. J. Gastroenterol. 29(Suppl. 207):6-10, 1994.
Nevens et al. "Measurement of cariceal pressure with an endoscopic pressure sensitive gauge." J. Hepatol. 24(1):66-73, 1996.

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