Abstract：
:Umbilical arterial velocity waveforms were recorded in 69 pairs of twins by means of continuous-wave Doppler analysis and an Angioscan spectrum analyzer. A systolic/diastolic ratio was measured for each twin. The sum of the systolic/diastolic ratio was calculated and the difference between each twin was expressed as the delta systolic/diastolic ratio. Significant differences in delta systolic/diastolic and neonatal weight were previously set at 0.4 and 350 gm, respectively. Sonography was used for fetal age confirmation and diagnosis of fetal growth retardation. All neonates were weighed; at birth gestational age was assigned by Dubowitz criteria and categorized as adequate-, small-, or large-for-gestational age. The sensitivity, specificity, and predictive value of the delta systolic/diastolic ratio were determined. The perinatal implications of this test in the management of twin pregnancy are discussed.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Saldana LR,Eads MC,Schaefer TRdoi
10.1016/s0002-9378(87)80035-2subject
Has Abstractpub_date
1987-09-01 00:00:00pages
712-5issue
3eissn
0002-9378issn
1097-6868pii
S0002-9378(87)80035-2journal_volume
157pub_type
杂志文章abstract：:The concentrations of certain steroids in arterial and ovarian venous blood were measured in 42 postmenopausal women undergoing hysterectomy for uterine disease. A concentration gradient across the ovary was found for testosterone in 21 women, for androstenedione in 16, for estradiol in 15, for estrone in 8, and for d...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(80)90287-2
更新日期：1980-11-01 00:00:00
abstract：:Immunoreactive endorphin peptides (ir EP) and prolactin (PRL) were measured by radioimmunoassay in venous blood from the umbilical cord of 86 neonates, 23 postpartum mothers, and 40 randomly selected blood bank donor control subjects. We also assayed these hormones in serosanguineous placental tissue fluid following d...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(81)90103-4
更新日期：1981-05-15 00:00:00
abstract：BACKGROUND:Noninvasive imaging autopsy alternatives for fetuses weighing <500 grams are limited. Microfocus computed tomography has been reported as a viable option in small case series with the potential to avoid an invasive autopsy. Implementation of postmortem microfocus computed tomography in a large cohort as part...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2020.07.019
更新日期：2021-01-01 00:00:00
abstract：OBJECTIVE:Mitochondfial respiratory activities were measured in neonatal rat brain to compare the influence of transient intrauterine ischemia in the preterm fetus with that in the term fetus and to evaluate the effect of alpha-phenyl-N -tert-butyl-nitrone treatment. STUDY DESIGN:Intrauterine ischemia was induced by a...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2001.111722
更新日期：2001-03-01 00:00:00
abstract：:Oligohydramnios is a hallmark for intrauterine growth retardation (IUGR) and has been evaluated in populations suspected of having IUGR. We chose to evaluate its incidence in a routine obstetric population. During a 16-month period, ultrasound scans were performed on 1,408 patients. Severe oligohydramnios was identifi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(16)32235-9
更新日期：1983-10-15 00:00:00
abstract：OBJECTIVE:The purpose of this study was to evaluate the efficacy of osteopathic manipulative treatment (OMT) to reduce low back pain and improve functioning during the third trimester in pregnancy and to improve selected outcomes of labor and delivery. STUDY DESIGN:Pregnancy research on osteopathic manipulation optimi...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.ajog.2014.07.043
更新日期：2015-01-01 00:00:00
abstract：:A letter is written in response to a report by Drs. Beric, Kupresanin, and Hulka (Am. J, Obslet Gynecol. 114: 273, 1972) which stated that the Karman catheter is not suitable for terminating pregnancies beyond Week 6 of pregnancy. The use of a Karman catheter in terminating pregnancies of 7-10 weeks resulted in 47% t...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(73)91070-3
更新日期：1973-05-15 00:00:00
abstract：OBJECTIVE:The purpose of this study was to assess the feasibility of using infrared spectroscopy to simultaneously predict preterm infection, fetal distress, and fetal lung maturity. STUDY DESIGN:A total of 189 infrared spectra were acquired from amniotic fluid obtained by amniocentesis. The concentrations of glucose ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(99)70275-9
更新日期：1999-03-01 00:00:00
abstract：OBJECTIVE:Accurate prediction of whether a nulliparous woman will have a vaginal delivery would be a major advance in obstetrics. The objective of the study was to develop such a model based on maternal characteristics and the results of intrapartum ultrasound. STUDY DESIGN:One hundred twenty-two nulliparous women in ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2015.05.044
更新日期：2015-09-01 00:00:00
abstract：OBJECTIVE:Our purpose was to examine the importance of fungal cultures in evaluating patients with symptoms of chronic vaginitis by assessing the relative contribution of various yeast species and by comparing infections caused by Candida albicans with those caused by other species. STUDY DESIGN:A prospective observat...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)90347-x
更新日期：1995-09-01 00:00:00
abstract：BACKGROUND:The composition of bacteria within the vaginal microbiome has garnered a lot of recent attention and has been associated with reproductive health and disease. Despite the common occurrence of yeast (primarily Candida) within the vaginal microbiome, there is still an incomplete picture of relationships betwee...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.10.008
更新日期：2020-05-01 00:00:00
abstract：:The balance of fluid across capillaries is given by the Starling equation. Because the plasma protein concentration (one of its components) is decreased in pregnancy, we decided to explore the question as to whether hypoproteinemia with intact protein mass (produced by blood volume expansion) or hypoproteinemia with d...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90938-1
更新日期：1989-12-01 00:00:00
abstract：OBJECTIVE:Our purpose was to evaluate the hemodynamic effects of oral nifedipine in preeclamptic hypertensive emergencies. STUDY DESIGN:A prospective observational study of the hemodynamic effects of oral nifedipine was conducted with severely preeclamptic patients receiving magnesium sulfate infusion during a hyperte...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(96)70143-6
更新日期：1996-08-01 00:00:00
abstract：OBJECTIVE:We aimed to characterize the effect of vaginal or abdominal mesh insertion and of different collagen augmentation of polypropylene mesh in a sheep model. Outcome measures were passive and active biomechanical properties and semiquantitative morphometry. STUDY DESIGN:Forty-two Texel sheep were used: 6 were no...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2014.11.008
更新日期：2015-04-01 00:00:00
abstract：OBJECTIVE:The study evaluates lipids profile changes during gestation in pregnancies with and without preeclampsia and/or gestational diabetes. STUDY DESIGN:Lipid profiles were assessed between year prior and after pregnancy in 9911 women without cardiovascular comorbidities. RESULTS:Lipid levels during gestation var...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2009.05.032
更新日期：2009-11-01 00:00:00
abstract：:A randomized prospective trial study was developed to determine the diagnostic value of the fetal biophysical profile in relationship to the nonstress test. The diagnostic values of these tests were assessed in terms of the incidence of abnormal outcome. In addition comparisons between the positive and negative predic...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1985-11-15 00:00:00
abstract：:The mechanical properties of the chorioamniotic membranes have been studied by several investigators over the past 100 years. No relationship between membrane strength, as measured by rupture tension, and premature or non-premature rupture of the membranes has been demonstrable. In the present study, several measures ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90788-2
更新日期：1976-07-01 00:00:00
abstract：:This is a retrospective study designed to compare the results of treatment of minimal and mild types of endometriosis with danazol alone, operative laparoscopy and danazol combined, and operative laparoscopy alone. The population consisted of 112 patients with minimal endometriosis and 126 patients with the mild type....
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(88)80173-x
更新日期：1988-10-01 00:00:00
abstract：:We report a case of sigmoid perforation, peritonitis, and adult respiratory distress syndrome after a loop excision procedure for carcinoma in situ of the cervix and dysplasia of the vagina. Treatment of vaginal dysplasia with loop excision is potentially dangerous. Safer methods of management include carbon dioxide l...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2000.102701
更新日期：2000-03-01 00:00:00
abstract：OBJECTIVE:Our purpose was to examine the hypothesis that the relaxant response to corticotropin-releasing factor is endothelium dependent and changes during pregnancy. STUDY DESIGN:Relaxant responses to cumulative concentrations of corticotropin-releasing hormone were measured in rings of thoracic aorta, precontracted...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(97)80042-7
更新日期：1997-01-01 00:00:00
abstract：:Maternal sepsis is a significant cause of maternal morbidity and mortality and is a preventable cause of maternal death. The purpose of this guideline is to summarize what is known about sepsis and to provide guidance for the management of sepsis in pregnancy and the postpartum period. The following are SMFM recommend...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.01.216
更新日期：2019-04-01 00:00:00
abstract：:Amniotic fluid creatinine, percentage of lipid-positive cells, and L/S ratio were determined on 285 samples from normal pregnancies and 222 samples from abnormal pregnancy states (Rh isoimmunization, diabetes, hypertensive disorders, intrauterine growth retardation, and hydramnios). In normal pregnancy the coefficient...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90777-8
更新日期：1976-07-01 00:00:00
abstract：OBJECTIVE:The objective of the study was to characterize the anatomy of the internal iliac artery (IIA) and its posterior division branches and to correlate these findings to IIA ligation. STUDY DESIGN:Dissections were performed in 54 female cadavers. RESULTS:Average length of IIA was 27.0 (range, 0-52) mm. Posterior...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2007.08.063
更新日期：2007-12-01 00:00:00
abstract：OBJECTIVE:The efficacy, safety, and antibiotic-related charges for once-daily gentamicin with twice-daily clindamycin were compared with those of thrice-daily dosing of these antibiotics. STUDY DESIGN:Patients with puerperal endometritis or with chorioamnionitis in labor assessed to be at risk for endometritis were ra...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/s0002-9378(97)70269-2
更新日期：1997-10-01 00:00:00
abstract：:Pelvic exenteration can be used to cure women with a central pelvic recurrence or persistence of gynecologic malignancy after initial definitive therapy. Refinements in patient selection, operative techniques, and surgical instrumentation have significantly improved outcomes over the past 60 years, but the procedure i...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.04.004
更新日期：2010-06-01 00:00:00
abstract：OBJECTIVES:Our purpose was to investigate the benefit, if any, of automated blood pressure monitoring over obstetric day unit conventional blood pressure measurement in the assessment of hypertensive pregnancies. STUDY DESIGN:A prospective, observational study was carried out in two large teaching hospitals. Three hun...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(98)70432-6
更新日期：1998-03-01 00:00:00
abstract：:Although the mortality rate after herpes simplex virus type 2 inoculation was not significantly different between pregnant mice and nonpregnant mice, systemic interferon production was very high during late pregnancy compared with that in nonpregnant mice. Antiviral activity was detected in placentas from all noninfec...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(85)80127-7
更新日期：1985-10-01 00:00:00
abstract：OBJECTIVE:The study was designed to evaluate whether double positive maternal serum screening results for Down syndrome and open neural tube defects indicate an increased risk of adverse perinatal outcome. STUDY DESIGN:A retrospective case-control study was conducted. In a cohort of 170,394 women who underwent materna...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.125240
更新日期：2002-09-01 00:00:00
abstract：:The adenosine-3',5'-monophosphate (cAMP) level in human amnion has been measured in vitro during short-term incubations, with or without prostaglandin E1 (PGE1) or isoproterenol. Concentration-response and kinetic curves were obtained. Isoproterenol and PGE1 stimulated cAMP production by amnion in a time-dependent man...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(16)32592-3
更新日期：1981-09-15 00:00:00
abstract：OBJECTIVE:Our purpose was to evaluate the effect of breast-feeding frequency on serum bilirubin levels in the first 3 days after birth. STUDY DESIGN:Two hundred seventy-five infants were randomly assigned to a frequent or demand breast-feeding schedule. RESULTS:Infants in the frequent group (n = 131) nursed nine (7.5...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/s0002-9378(94)70302-7
更新日期：1994-03-01 00:00:00
