Method and device for measuring portal blood pressure

Details Method and device for measuring portal blood pressure Method and device for measuring portal blood pressure

1994-04-13

1997-08-05

Sykes, Angela D.

Surgery

Truss

Pad

128748, A61B 50215

Patent

active

056532407

ABSTRACT:
A method and a device to measure portal blood pressure with an endoscope and an inflatable balloon inserted into the esophagus and positioned at the diaphragmatic hiatus. A balloon mounted over a tube is placed within the diaphragmatic hiatus and gradually inflated through a lumen that runs from the balloon to a position that is external from the patient. The pressure within the balloon is increased until the blood flow in the collateral portal hepatic veins that traverse the diaphragm at this location are occluded. The occlusion of the blood flow is signaled when esophageal varices visible above the balloon collapse. The internal balloon pressure required to occlude the blood flow in these collateral portal veins is approximately equivalent to the pressure in the main portal vein.

REFERENCES:
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patent: 4367747 (1983-01-01), Witzel
patent: 4735194 (1988-04-01), Stiegmann
patent: 4832691 (1989-05-01), Witzel
patent: 4981470 (1991-01-01), Bombeck, IV
patent: 5181517 (1993-01-01), Hickey
patent: 5247938 (1993-09-01), Silverstein et al.

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