S108 Ultrasound in Medicine and Biology Volume 23, Supplement 1,1997

OGO 6355 OGO 6452 MATHEMATICAL MODEL OF FOETO-MATERNAL

CIRCULATION : APPLICATION TO THE IIYPOXIC SITUATIONS

Transvagind Collor Doppler ultrasound in overian endometrlonua

E. Menigault, B. Lepoivre, P. Vieyres, J.L. Lacaze, M. Berson, L. Pourcelot

Schmillevltch J, Zaoforlln F S, Pirea R C, Gorskl C A, Mu&r M.

JNSEBM U.316, Fact& de M&lecine, 2 bis bld TonnellC, 37032 Tours cedex. FRANCE

Ultrasonic techniques like Echography-Doppler are widely used by clinicians to study foetal and maternal blood flows, especially in cerebral, umbilical and uterine arteries. Blood flow velocities reflect the foetal well-being and their interpretation give many clinical informations. In order to study these flows we have made a mathematical model of the human foeto-maternal circulation. Our model is able to compute instantaneous blood flows and pressures in the main foetal arteries and in the maternal uterine arteries, This model includes also oxygen transfers in foeto- maternal circulation and blood flow regulation based on oxygen needs of vital territories like foetrd brain, Placental vascular pathologies inducing a fcetal oxygenation decrease are modellised by a placental heaemodynamic resistance increase. Our results agree with in vivo physiological and pathological flows measured on foetuses. Important haemodynamic changes like the ombilical reverse flow and the ‘notch’ observed in the uterine arteries are computed by the mcdel.The evolutions of blood flows, resistances indexes and oxygen partial pressures fit well with in vivo data. This model gives mteressant insights into the human foeto- maternal circulation in physiological and pathological situations.

OGO 6356 ABNORMAL UMBILICAL VELOCIMETRY DOPPLER IN PREECLAMPSLA: OBSTETRlCS AND PERtNATAL RESULTS Fetal Surveillance Unit - Almenara Hospital - Lima - Peru Author : Cartes Zavala M.D., A. Donaym M.D. Obkctive: To determinate if the abnormal umbilical velocimetry Doppler in preedamptic patients have a direct relation with adverse obsktrics and petinatal results. De&n: We studii 82 preeclapmtic patients with mild and severe grades. This study was made with Ultramark - 9 Doppler Duplex Color machine, using the conventional techniques. The analyzed variables were: gestational age, delivery way, indication for cesarean section, meconial amniotic fluid, Apgar of newborn, neonatal complications, and parinatal outcome, the presence of acute fetal distress that conducted to a cesarean section, Apgar < 7 at 5 minutes, important neonatal morbidity or petinatal death. The results were analyzed with statistical test RESULTS: We find an abnormal pulsality index in 51 of 82 studied preeclamptic patients (69.1%). This group shown the major incidence of prematurity, cesarean for fetal distress, asphyxia at born an perinatal death, compared with the group with normal Doppler. CONCLUSIONS: The Doppler velocimetry is a modem technic of fetal surveillance and offers an important help in the detection of the early asphyxia fetal intrautero.

The authors presest the results b 136 ovarian endometrlomaa lo 120 pticnts. AU of them were eumlned by transvqlnal cdlor doppler, fdiowed by Irparoscopy and am’gery. The flndlng showed 66% of the endomctrlomas aa cbtlc mamea wltb partlelea inside with a mean size of 4.5 +I- 0.4 cm. Blood flow WI preaeat ln 78% of the cases, elw~ys in the periphery of organ, with few spots of vascular color seen la eneh mass The reslstency index was between 0.46 to 0.89 sad the medle of 0.58 +!- 0.02.

OGO 6454 COLOR DOPPLER HYSTEROSALPINGOGRAPHY S. Kupesic

Department of Obstetrics and Gynecology, Medical School University of Zagreb, Sveti Duh Hospital, Zagreb, Croatia

OBJECTIVE: To evaluate the role of transvaginal color Doppler hysterosalpingography in the diagnosis of tubal patency.

STUDY DESIGN: We compared the findings of color Doppler hysterosalpingography from 132 patients with

those of chromopertubation at the time of laparoscopy.

The contrast media u5ed was isotonic saline.

RESULTS: One hundred and twenty five out of 132 (9489%) color Doppler HSG findings agreed with observations at chromopertubation. Bilateral tubal patency

was successfully detected by color Doppler HSG in 54

out of 57 patients, while unilateral patency was shown in 29 out of 31 cases. In 42 patients color Doppler HSG indicated bilateral tubal occlusion.

CONCLUSION: Transvaginal color Doppler hystero-

salpingography is a safe and efficacious method for evaluation of the Fallopian tube patency without exposure

to radiation or contrast dyes.