NATURAL-HISTORY OF PLACENTA PREVIA ASCERTAINED BY DIAGNOSTIC ULTRASOUND

被引:55
作者
RIZOS, N
DORAN, TA
MISKIN, M
BENZIE, RJ
FORD, JA
机构
[1] TORONTO GEN HOSP,DEPT OBSTET & GYNAECOL,TORONTO,ONTARIO,CANADA
[2] UNIV TORONTO,MT SINAI HOSP,DEPT RADIOL,TORONTO,ONTARIO,CANADA
关键词
D O I
10.1016/0002-9378(79)90680-X
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
Placental localization by diagnostic ultrasound was performed at 16 to 18 weeks' gestation in 1,098 patients prior to amniocentesis for genetic indications. Placenta previa was diagnosed in 58 patients, 47 of whom went on to delivery uncomplicated by placenta previa. There were five patients with placenta previa at delivery, four of whom had third-trimester bleeding. One patient was diagnosed as having a normal placental implantation at midtrimester but placenta previa was demonstrated at delivery. The incidence of placenta previa at 16 to 18 weeks' was 5.3% and fell to 0.58% at delivery, indicating a 90% conversion rate. Thus the vast majority of cases of asymptomatic placenta previa remain so and convert before delivery. These patients should be observed with serial ultrasound at 6 to 8 week intervals until delivery or unequivocal conversion. No restriction in activity seems indicated unless the placenta previa persists beyond 30 weeks or becomes clinically manifest. © 1979.
引用
收藏
页码:287 / 291
页数:5
相关论文
共 13 条
[1]  
BADRIA L, 1976, Journal of Clinical Ultrasound, V4, P403, DOI 10.1002/jcu.1870040606
[2]   ANTENATAL DIAGNOSIS OF GENETIC DISEASE [J].
DORAN, TA ;
RUDD, NL ;
GARDNER, HA ;
LOWDEN, JA ;
BENZIE, RJ ;
LIEDGREN, SI .
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, 1974, 118 (03) :314-321
[3]  
EDELSTONE D I, 1977, Clinical Obstetrics and Gynecology, V20, P285, DOI 10.1097/00003081-197706000-00009
[4]   ULTRASONIC DIAGNOSIS OF EMBRYONIC MALFORMATIONS [J].
HELLMAN, LM ;
KOBAYASHI, M ;
CROMB, E .
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY, 1973, 115 (05) :615-623
[5]  
HIBBARD LT, 1969, AM J OBSTET GYNECOL, V104, P172, DOI 10.1016/0002-9378(69)90659-0
[6]   PLACENTAL MIGRATION DEMONSTRATED BY ULTRASONOGRAPHY - HYPOTHESIS OF DYNAMIC PLACENTATION [J].
KING, DL .
RADIOLOGY, 1973, 109 (01) :167-170
[7]  
KUKARD RFP, 1973, J OBSTET GYN BR COMM, V80, P433
[8]   CHANGES OF PLACENTAL SITE DIAGNOSED BY REPEATED ULTRASONIC EXAMINATION [J].
KURJAK, A ;
BARSIC, B .
ACTA OBSTETRICIA ET GYNECOLOGICA SCANDINAVICA, 1977, 56 (03) :161-165
[9]  
MEYENBURG M, 1976, GEBURTSH FRAUENHEILK, V36, P715
[10]  
MISKIN M, 1974, OBSTET GYNECOL, V43, P872