Durchblutungsmessung der Plazenta mit Technetium

Comparison of Uteroplacental Blood Flow in Normal and in Intrauterine Growth-Retarded Pregnancy

“…However, the injection of the isotope into the intervillous space is difficult from a technical point of view (6,12,16). (V) Time-activity analysis of short-lived radiotracers such as technetium-99m or indium-113m injected intravenously is the method most frequently reported in the literature during the last years (7,8,10,19,21). A detailed review of the various methods has been published by Lunell and Sarby (13).…”

Assessment of Uteroplacental Hemodynamics in Complicated Pregnancy

“…Other authors have described their results in terms of uteroplacental turnover (24), initial slope and halftime of accumulation (1) and placental perfusion index (13). More empirical evaluation of the results from inflow measurements have also been reported (15,18,22). In the present work, times of the placental, heart and myometrial inflow phases have been the indices for assessing the hemodynamic situation, producing useful information and avoiding inaccurate assumptions.…”

“…It is recognized that placental perfusion is deficient in preeclampsia. Assali et al (2) demonstrated this in 1954 by direct sampling of the blood, and others, by measuring the inflow phase of radioactive isotopes (13,15,22,24). Applying a similar technique, Laakso et al (18) found no differences between a group of healthy patients and one with mild preeclampsia.…”