Studies In Vitro and in Canine Mesenteric Vessels

The accuracy and reliability of a noninvasive pressure- sensitive capsule for the endoscopic measurement of esophageal varix pressure was evaluated. Capsule pressure was correlated with direct intraluminal pressure measurements. The influence o/vessel wall tension on capsule pressure was also assessed. In vitro studies demonstrated an excellent correlation (r ≥ 0.94; p