A new ultrasound-guided esophageal variceal pressure-measuring device

The American Journal of Gastroenterology
Larry S MillerJoseph K Kim

Abstract

To develop a noninvasive method and device to determine intravariceal pressure and variceal wall tension by measuring the variables of the Laplace equation and test this device in a model of esophageal varices. Two variceal pressure measurement devices were constructed. The first device consists of an Olympus 20 MHz ultrasound transducer placed next to a latex balloon catheter attached to a pressure transducer. The second device was constructed by placing the same ultrasound transducer inside a latex condom balloon attached to a pressure transducer. These pressure measurement devices were tested blindly in varix models with different intravariceal pressures, by inflating the balloon to flatten the varix models. Each variceal pressure was measured 10 times by two separate investigators blinded to the actual pressures. The mean intravariceal pressures were calculated. The variceal models were made of a latex balloon filled with water and coffeemate. The correlation coefficient between the actual and measured varix pressures for both devices was 0.99. The percent error ranged from 0 to 10%. The correlation coefficient between the investigators making the blinded measurements for both devices was 0.98. Two pressure-measuring device...Continue Reading

References

Jan 13, 1998·Hepatology : Official Journal of the American Association for the Study of Liver Diseases·F NevensJ Fevery

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Citations

Jul 19, 2013·World Journal of Gastroenterology : WJG·De-Run KongJian-Ming Xu
Sep 14, 2004·American Journal of Physiology. Gastrointestinal and Liver Physiology·Larry S MillerJames G Brasseur
Sep 8, 2009·European Journal of Gastroenterology & Hepatology·Stefania De Lisi, Elisabetta Buscarini
Sep 18, 2010·The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi·Tae Hee Lee
Nov 30, 2019·Experimental and Therapeutic Medicine·Xi WangDerun Kong

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