Objectives: The aim of this study was to compare the effects ofmaternal positions on umbilical artery (UA) S/D ratios in normal andhigh risk pregnancy women.Methods: UA S/D ratios were measured after 30 week gestation in 34normal pregnancy women and 19 high risk pregnancy women. Themeasurements were performed with the mother in the supine, leftlateral, sitting, and standing position serially.Results: UA S/D ratios in the supine, left lateral, sitting and standingpositions of normal pregnancy were 2.28 � 0.35, 2.24 � 0.27, 2.49 �0.40 and 2.31 � 0.34. Umbilical artery S/D ratios in the sitting positionwas significantly higher than other positions of normal pregnancy (p �0.05). UA S/D ratios in that position of high risk pregnancy were 3.18� 0.44 2.92 � 0.33, 3.67 � 0.39 and 3.32 � 0.57. UA S/D ratios inthe sitting position were significantly higher than other positions ofhigh risk pregnancy (p � 0.01). The rise in UA S/D ratios from otherpositions to sitting position of high risk pregnancy more significantthan that of normal pregnancy.Conclusions: The umbilical arterial flow of the mothers in sittingposition may be affected higher than any other positions. The differ-ence in UA S/D ratios from other positions to sitting position wassuggested a value as screening test for high risk pregnancy.

3403

Sonographically misdiagnosed degenerated myoma in pregnancy:A case reportCho HJ, Nam KH, Kim TH, Kim JS, Lee KH, SoonchunhyangUniversity Bucheon, Korea

The object is to improve the diagnostic ability of ultrasonography ofdegenerated myoma during pregnancy. We experienced one case ofdegenerated myoma in pregnancy of 12 weeks of gestational ages. Thepatient was diagnosed ovarian neoplasm by MRI and then transferredto our hospital. After evaluation with sonography, patient was diag-nosed ovarian mass and operated under spinal anesthesia at 12 weeksof gestational ages. Final diagnosis was cystic degenerated myomalocated in cervix. Accurate sonographic diagnosis made a patient avoidunnecessarily invasive treatment.

3404

Comparative study by diagnosis timing in cornual pregnancyRa LGS, Chul KK, Joo KD, Yang PI, Joong LH, Jin KS, Chul SJ,Pyung KS, St. Vincent’s Hospital, The Catholic University of Korea,Korea; The Catholic University of Korea, Korea

Objectives: To determine the efficacy of ultrasonogram in the detec-tion of cornual pregnancy and the factors that might be affected onearly diagnosis.Methods: We studied 20 cases which were diagnosed as a cornualpregnancy from January 1, 2000 to December 31, 2004 at St. Vincent’sHospital of the Catholic University of Korea. Two groups were com-pared. One group was diagnosed as a cornual pregnancy before oper-ation, the other was not diagnosed until operation.Results: Sixty-five percent were not diagnosed by ultrasonogram untilthe operation has been carried out; 35% were diagnosed by ultrasono-gram before operation; two cases of nine unruptured cases were diag-nosed as a tubal pregnancy before operation. There were not significantdifferences in age, amenorrhea duration between two groups. However,number of abortion, parity and past history of ectopic pregnancy weresignificantly increased in case of diagnosed group before operation.Conclusions: Awareness of sonographic findings of cornual pregnancyshould improve its detection and may alter management.

3405

Preoperative diagnosis of small-bowel intussusception inpregnancy with the use of sonographyChoi SA, Park SJ, Yi BH, Lee HK, Kim HC, SoonchunhyangUniversity Bucheon Hospital, Korea; Soonchunhyang UniversityCheonan Hospital, Korea

Intestinal obstruction during pregnancy is a rare condition and rangesfrom 0.067% to 0.0015%. When it happens, however, it causes con-siderable morbidity and mortality for both of the pregnant and the fetus.Intussusception is one cause of intestinal obstruction, occurring in up to6% in pregnant women. In addition, despite specific radiologic find-ings, preoperative diagnosis of small-bowel intussusception in latepregnancy is difficult and commonly delayed because of superiordisplacement of small-bowel loops by the enlarged uterus. If morepreoperative diagnosis were possible, fetomaternal morbidity and mor-tality would be reduced by appropriate management, including imme-diate surgery and aggressive fluid resuscitation. We report a preoper-atively diagnosed case of small-bowel intussusception in pregnancywith the use of sonography and describe the compression techniquewith a high-frequency transducer. Transabdominal sonography is anoninvasive diagnostic study that may provide important informationfor intestinal obstruction during pregnancy, particularly in cases ofintussusception.

3406

Successful conservative management of Cesarean section scarpregnancy (CSP)Lee H-C, Lee S-J, Lim J-H, Park Y-W, Kim Y-H, SeveranceHospital, Yonsei University College of Medicine, Korea

A Cesarean section scar pregnancy is a rare but possibly life-threaten-ing condition. The diagnosis is made mainly based on transvaginalultrasonography. We used the Doppler and serial bHCG in determiningthe severity and prognosis. Because of the rarity, universal treatmenthas not been established. In our cases, the severity of bleeding wasindependent of the level of bHCG and the duration of amenorrhea. Theshorter the interval from the previous Cesarean section, the more severethe symptom; in such case, we were able to preserve fertility by uterineartery embolization. CSP can be managed conservatively with metho-trexate injection. Based on our case review, we can conclude that it isvery important that we choose each therapeutic management based onpatient history and condition. In our review, we present four casesdiagnosed with CSP all managed conservatively to preserve futurefertility.

3407

Ultrasound in diagnosis of the fetal skeletal abnormalityYang TZ, He M, Luo H, West China 2nd Hospital of SiChuanUniversity, China

Objectives: To assess the value of the ultrasound in diagnosis of thefetal skeletal abnormality and study the characteristic of it in ultra-sonography.Methods: Analyze the ultrasonogram of 380 cases of the fetal abnor-mality among 2001 to 2005, retrospectively, and study the ultrasono-graphic characteristic of the fetal skeletal abnormality.Results: Twenty-seven cases of fetal skeletal abnormality were pre-sented in 380 cases of fetal abnormality and 7.2% of all.Conclusions: Ultrasound has definite accuracy in the evaluation of thefetal skeletal abnormality, therefore, it should be considered as theroutine method for prenatal detection of the fetal abnormality. For itsvarious performance, nevertheless, there are still some type of fetalskeletal abnormality cannot be detected prenatal.

Abstracts P259