[Ultrasonic pulsed Doppler duplex system determination of portal hemodynamic changes in portal hypertension].

Ultrasonic pulsed Doppler duplex system was used to observe the portal hemodynamic changes before and after shunting or nonshunting operations. The results of preoperative measurements revealed significant increases of blood flow volumes of portal and splenic veins in portal hypertension subjects, and a positive correlation was obtained in the subjects with portal hypertension. Postoperative results showed significant reduction of portal blood flow volume more after shunting than the nonshunting operations. The etiology of portal hypertension and the causes of portal hemodynamic changes due to operations were discussed.