[The determination of the normal values of blood flow velocities in the superior mesenteric artery of premature and term newborns with duplex sonography].

In a prospective study blood flow velocity measurements were performed in 110 "healthy" newborn with duplex Doppler sonography in the superior mesenteric artery to obtain standard values. In 49 of these neonates 15, 30, and 45 minutes following feeding examinations were performed. Peak systolic flow velocity, end systolic flow velocity, time average flow velocity and time average maximum flow velocity were determined, the resistance and Pourcelot index as well as the volume blood flow were calculated. The children's gestational age was 27-42 weeks, the postnatal age was 2-68 days and the body weight was 920-4190 g. All measured blood flow velocities showed a synchronous relation to feeding with an increase of blood flow velocity between 15 and 30 minutes and a decrease of blood flow velocity after feeding. The ascertained fasting measurements from 91 newborn (last feeding > 3 h < 12 h) differed significantly from the ascertained basic fasting measurements (last feeding > 12 h) from 15 infants.