Abstract:
OBJECTIVE:Fetal to neonatal transition involves a myriad of endocrine and renal adaptive changes triggered by multiple simultaneous stimuli. We examined the extent to which ventilation and umbilical cord occlusion have an impact on the many endocrine and renal function changes in fetal sheep at 133 +/- 1 day of gestation. STUDY DESIGN:Nine fetuses were chronically prepared with an endotracheal tube, vascular and bladder catheters, and an inflatable umbilical cord occluder. After a 2-hour control period fetuses were treated with commercially prepared surfactant and ventilated with 100% oxygen. One hour after the onset of stable ventilation the umbilical cord was occluded and the animals were monitored for 3-hours. RESULTS:In response to ventilation fetal arterial PO2 increased (18 +/- 1 to 86 +/- 29 mm Hg) and remained significantly above control values after cord occlusion. Fetal arterial pH, hematocrit, and mean arterial pressure and heart rate did not change during the study. Ventilation alone evoked significant increases in epinephrine and norepinephrine concentrations. Renal responses to ventilation included significant decreases in urine flow rate, fractional sodium excretion, and fractional water excretion. Neither ventilation nor cord occlusion resulted in significant changes in plasma concentrations of atrial natriuretic factor, arginine vasopressin, and angiotensin II or in glomerular filtration rate, urine osmolality, free water, and osmolar clearances. CONCLUSIONS:(1) Mechanical ventilation and oxygenation alone increase circulating fetal catecholamine levels. (2) The addition of umbilical cord ligation has minimal impact on fetal endocrine and renal adaptive responses.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Ogundipe OA,Kullama LK,Stein H,Nijland MJ,Ervin MG,Padbury J,Ross MGdoi
10.1016/0002-9378(93)90422-fsubject
Has Abstractpub_date
1993-12-01 00:00:00pages
1479-86issue
6eissn
0002-9378issn
1097-6868pii
0002-9378(93)90422-Fjournal_volume
169pub_type
杂志文章abstract::From January 1, 1970 to July 1, 1976, 128 women had hydatidiform moles evacuated at the Los Angeles County-University of Southern California Women's Hospitals. Of the 121 patients with follow-up, persistent trophoblastic disease (TD) was diagnosed in 32 (26.4 per cent). Remission was achieved in all treated patients. ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(77)90562-2
更新日期:1977-06-15 00:00:00
abstract:OBJECTIVE:The aim of this study was to explore the association between glycosylated hemoglobin concentrations during pregnancy and macrosomia. STUDY DESIGN:One hundred thirty-six pregnancies in 120 women with type 1 or type 2 diabetes were studied longitudinally between January 1, 1991, and December 31, 1996. Glycosyl...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(99)70460-6
更新日期:1999-07-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine the prevalence of acute hepatitis B in intrapartum patients and to describe the birth-to-administration interval of the hepatitis B vaccine and immune globulin in hepatitis B surface antigen-positive patients detected by intrapartum screening. STUDY DESIGN:Hepatitis...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(95)90254-6
更新日期:1995-08-01 00:00:00
abstract:OBJECTIVE:This study was undertaken to examine the contribution of electronic fetal heart rate monitoring in the prediction and prevention of intrapartum fetal asphyxia in the preterm pregnancy. STUDY DESIGN:The outcome of 40 pregnancies with biochemically confirmed intrapartum fetal asphyxia (ie, an umbilical artery ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/mob.2002.119642
更新日期:2002-02-01 00:00:00
abstract::Serum alpha-fetoprotein (AFP) levels in patients with hydatidiform mole, choriocarcinoma, and twin pregnancy were studied by radioimmunoassay. Serum AFP was absent in seven of seven patients (100 per cent) with choriocarcinoma and 10 of 13 (76.9 per cent) with hydatidiform mole. However, low concentrations (below 8 ng...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(75)90088-5
更新日期:1975-02-15 00:00:00
abstract::This article presents a review of 902 tubal sterilizations performed in an 18 1/2-year period at a predominantly private teaching service. 803 (89%) of the sterilizations were puerperal, generally performed within 48 hours of delivery or with cesarean section. The Pomeroy technique (often modified) was used in 97.2%...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1967-02-15 00:00:00
abstract:OBJECTIVE:In 2005, 4 Clostridium sordellii-associated toxic shock fatalities were reported in young Californian women after medical abortions. The true incidence of this rare disease is unknown, and a population-based study has never been performed. Additional clostridia-associated deaths were sought to describe associ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2009.05.023
更新日期:2009-11-01 00:00:00
abstract:OBJECTIVE:The study was conducted to systematically investigate previous anecdotal reports of memory decline during pregnancy. STUDY DESIGN:We used a longitudinal design to investigate memory in women throughout pregnancy and in the postpartum period. Closely matched, nonpregnant women were similarly studied at equiva...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(98)70073-0
更新日期:1998-09-01 00:00:00
abstract::The results of preoperative computed tomography and operative findings were assessed retrospectively in 52 patients with cervical, uterine, and ovarian neoplasms. Overall sensitivity and specificity for all disease states was 57% and 79%, respectively. Overall diagnostic accuracy was 69%. The use of computed tomograph...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(86)90325-x
更新日期:1986-11-01 00:00:00
abstract::A retrospective study of 56 patients treated for carcinoma in situ of the vulva over a 24-year period has shown a relative increase in the occurrence of this neoplasm. Only 6.7% of patients in the first 14 years of the study period were less than 35 years of age, as compared with 29.3% in the last decade. In the earli...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(84)90669-0
更新日期:1984-11-15 00:00:00
abstract:OBJECTIVE:We determined developmental and labor-related changes in 11beta-hydroxysteroid (HSD) 1 and 2 expression in baboon placentas during the final third of gestation and labor. We examined whether maternal glucocorticoid administration alters placental 11beta-HSD 2 expression. STUDY DESIGN:Maternal and fetal plasm...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/mob.2003.62
更新日期:2003-01-01 00:00:00
abstract::We performed a case-control study of the effect of exposure to Chlamydia trachomatis on the risk for tubal pregnancy. Sixty women with tubal pregnancies and 60 matched control women with normal second-trimester intrauterine pregnancies were studied. Cases were more likely than controls to have detectable antichlamydia...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(88)80177-7
更新日期:1988-10-01 00:00:00
abstract:OBJECTIVE:We sought to evaluate an intrapartum nucleic acid amplification test (NAAT) for group B streptococcus (GBS). STUDY DESIGN:This was a prospective cohort study of 559 women comparing intrapartum GBS culture with antepartum culture and intrapartum NAAT. RESULTS:GBS prevalence was 19.5% by antepartum culture an...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2011.06.087
更新日期:2011-10-01 00:00:00
abstract:BACKGROUND:Randomized controlled trials that have assessed the efficacy of cervical pessary to prevent preterm birth in asymptomatic high-risk women have reported conflicting results. OBJECTIVE:To evaluate the efficacy and safety of cervical pessary to prevent preterm birth and adverse perinatal outcomes in asymptomat...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,meta分析
doi:10.1016/j.ajog.2019.12.266
更新日期:2020-07-01 00:00:00
abstract::Circulating norepinephrine and epinephrine were determined nine times over a 1-hour period in chronically instrumented ewes (n = 4), their fetuses (n = 4), and lambs (n = 4). In an apparent resting state, assessed by subjective and biophysical parameters, marked fluctuations were demonstrated in the mean norepinephrin...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(83)90103-5
更新日期:1983-09-15 00:00:00
abstract::Bicycle ergometry (non-weight-bearing exercise) and treadmill (weight-bearing exercise) were compared to assess physiologic responses to similar work loads. A total of 22 subjects at 29.3 +/- 1.6 (+/- SEM) weeks' gestation who performed non-weight-bearing exercise were compared with 15 similarly fit subjects at 26.1 +...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(89)90905-8
更新日期:1989-12-01 00:00:00
abstract::In a series of 198 exenterative operations performed at the Mayo Clinic for various pelvic malignant lesions, a 5 year survival rate of 33 per cent was obtained. This rate is commendable, since almost 80 per cent of the operations were accomplished for recurrent malignancy. The diminished over-all operative mortality ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(75)90908-4
更新日期:1975-04-01 00:00:00
abstract:OBJECTIVE:We sought to study neonatal outcomes in early preterm births by delivery route. STUDY DESIGN:Delivery precursors were analyzed in 4352 singleton deliveries, 24 0/7 to 31 6/7 weeks' gestation. In a subset (n = 2906) eligible for a trial of labor, neonatal mortality in attempted vaginal delivery (VD) was compa...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2012.06.023
更新日期:2012-08-01 00:00:00
abstract::To determine the effects of suppressing fetal and maternal adrenal activity on parturition, we treated pregnant rhesus macaques with dexamethasone (0.25 to 4.0 mg, twice a day) from gestation day 130 until delivery (term = 167 days). Long-term dexamethasone treatment increased gestation length: 71% of fetuses were bor...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(83)90841-4
更新日期:1983-04-15 00:00:00
abstract::Oxytocin concentrations were determined in baboon (Papio anubis) corpora lutea, and the effect of oxytocin on dispersed luteal cell progesterone production was evaluated. Oxytocin concentrations increased significantly from an early luteal phase value of 2.1 +/- 1.1 ng/gm to a peak concentration of 18.1 +/- 4.3 ng/gm ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(88)90089-0
更新日期:1988-04-01 00:00:00
abstract::CO2 hysteroscopy for diagnosis of cervical polyps was performed in 36 patients. The polyps could be located under direct vision and their attachments were found to be deeper than what is seen in regular inspection. A relatively high number of endometrial polyps were found. It is advised that the polyps be surgically r...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(78)90324-1
更新日期:1978-03-15 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine the normal beta-human chorionic gonadotropin change within 24 hours after a medical abortion. Because a medical abortion creates a "miscarriage," these data can represent the serum beta-human chorionic gonadotropin changes that would occur with a complete spontaneous...
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(96)70463-5
更新日期:1996-02-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine the superior technique, if either, of the amniotic fluid index (AFI) vs the single deepest pocket technique in predicting an adverse pregnancy outcome among high-risk patients undergoing antenatal testing. STUDY DESIGN:Patients having modified biophysical profile (n...
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/j.ajog.2004.06.078
更新日期:2004-08-01 00:00:00
abstract:OBJECTIVE:There has been a gradual shift of the focus of prenatal diagnosis from genetics to ultrasonography. We assessed our primary genetics approach to determine what would be missed without the genetics component. STUDY DESIGN:We evaluated referral indications for patients with normal and abnormal prenatal finding...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(96)70230-2
更新日期:1996-06-01 00:00:00
abstract:OBJECTIVES:The objectives of this study were to determine the mechanisms responsible for the initiation and the termination of episodes of circus movements and to describe the characteristics of these circuits in rat myometrium. STUDY DESIGN:By means of simultaneous recordings from 240 sites in Wistar rats at 17, 19, ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(98)70018-3
更新日期:1998-12-01 00:00:00
abstract::This article is from the "To The Point" series prepared by the Association of Professors of Gynecology and Obstetrics Undergraduate Medical Education Committee. The purpose of this review was to provide an overview of the importance of well-being in medical education. A literature search was performed by a Reference L...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1016/j.ajog.2019.05.012
更新日期:2019-12-01 00:00:00
abstract::Serine proteases such as plasminogen activators are produced by granulosa cells both in vivo and in vitro and have been implicated in the process of ovulation. For a study of potential roles of serine proteases in early follicular development, immature rats were injected with pregnant mare serum gonadotropin, followed...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(88)90051-8
更新日期:1988-03-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine the frequency and clinical significance of intraamniotic inflammation in patients with acute cervical insufficiency. STUDY DESIGN:Amniocentesis was performed in 52 patients with acute cervical insufficiency (cervical dilation, > or =1.5 cm) and intact membranes and ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2007.11.047
更新日期:2008-06-01 00:00:00
abstract:OBJECTIVE:Our purpose was to review our results of multimodality treatment of lymph node metastasis in endometrial cancer (stage IIIC). STUDY DESIGN:All patients underwent surgical staging for endometrial cancer with complete pelvic and aortic lymphadenectomy. All macroscopic nodal metastases were resected. Patients w...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/mob.2001.115225
更新日期:2001-05-01 00:00:00
abstract:OBJECTIVE:Women with Papanicolaou tests classified as cervical intraepithelial neoplasia grade I or II are treated conservatively in many countries. However, these women are at an increased risk of having underlying prevalent and incident grade III cervical intraepithelial neoplasia and invasive cancer. This study was ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/mob.2002.118918
更新日期:2002-01-01 00:00:00