[Umbilical blood flow relations in pregnancy complications. Part 2. Pathologic index constellations].

In a study comprising a total of 700 pregnant women, umbilical resistance was examined. Measurements were taken at both sides of the cord. A decline in resistance was registered from the fetal abdominal wall to the placental insertion of the vessels. According to a collective of 500 patients with a normal development and outcome of their pregnancies a physiological constellation of the resistance indices could be confirmed. It was taken as a basis for the definition of pathological cases. Different pathologies were related quite clearly to a special (unphysiological) constellation of the indices.