01347nas a2200133   4500008004100000020001400041245010700055210006900162260000900231300001200240490000700252520090900259856004501168       1985                        eng d  a0378-734600aDetermination of the intervillous perfusion index in pregnancies with intrauterine growth retardation.0 aDetermination of the intervillous perfusion index in pregnancies  c1985  a89 - 910 v193 aThe authors developed a new radioisotope technique to measure placental bloodflow for early detection of placental insufficiency. Using this method placental 
perfusion has been measured in 20 healthy pregnant women and in 15 pregnancies
complicated with intrauterine growth retardation (IUGR). The T-maximum pictures
obtained made it possible to differentiate between the vascular and intervillous 
phases of placental blood flow. The time period of intervillous phase calculated 
as the percent of the whole placental T-maximum was given as the intervillous
perfusion index (IPI). It has been demonstrated that IPI is significantly longer 
in IUGR pregnancies (67.0 +/- 14.6) than in the control group (31.6 +/- 10.7).
These data suggest that the first sign of placental insufficiency is the
prolongation of IPI, which is likely to precede the quantitative reduction of
placental perfusion.
  uhttps://www.inf.u-szeged.hu/en/node/1396