Abstract:
:Nine pregnant women near term, with medical indications for internal monitoring during labor, were studied to determine the transmission of sound across maternal soft tissues during vibroacoustic stimulation with an electronic artificial larynx. A miniaturized hydrophone was placed transcervically at the level of the fetal neck under ultrasound guidance. Intrauterine sound pressure levels were measured before and during stimulation applied at 1 and 0 cm from the surface of the maternal abdomen. When the electronic artificial larynx was placed at a distance of 1 cm from the maternal abdomen, the intrauterine sound pressure level averaged 75 dB at frequencies between 0-5000 Hz. However, when the electronic artificial larynx was firmly applied on the maternal abdomen, intrauterine sound pressure levels were enhanced by more than 20 dB (P less than .001) and averaged 95 dB at all frequencies between 87-20,000 Hz. Baseline intrauterine sound pressure levels consisted of low-frequency sound with intensity of 85 dB at 12.5 Hz, decreasing to 60 dB at 100 Hz and less than 40 dB above 200 Hz. There was a significant correlation (r = 0.78, P less than .02) between the duration of the first fetal heart rate (FHR) acceleration following stimulus and the overall intrauterine sound pressure level at the time of the stimulus. Our data suggest that a threshold of 94 dB intrauterine sound pressure level is necessary to produce a consistent FHR response during active labor.
journal_name
Obstet Gynecoljournal_title
Obstetrics and gynecologyauthors
Gagnon R,Benzaquen S,Hunse Csubject
Has Abstractpub_date
1992-06-01 00:00:00pages
950-5issue
6eissn
0029-7844issn
1873-233Xjournal_volume
79pub_type
杂志文章abstract::This study covers 20 years' experience in the treatment of carcinoma of the cervix. Improved results and a decreased rate of major complications are seen as a result of a cooperative approach in treatment planning and careful dosimetry. Comparisons are made with large treatment centers as well as with national surviva...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1978-10-01 00:00:00
abstract:OBJECTIVE:We sought to examine prescribing patterns (prevalence and rates of initiation and discontinuation) for estrogen plus progestin (hormone therapy [HT] and estrogen alone [ET]) in the United States in the 2 years before the published results of Women's Health Initiative's (WHI) HT trial's early termination and f...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/01.AOG.0000143826.38439.af
更新日期:2004-11-01 00:00:00
abstract::Laparoscopy was used to evaluate 100 women who consistently reported pelvic pain in the same location for a minimum of six months. These findings were compared with those of 50 asymptomatic women who underwent laparoscopy for tubal ligation. Overall, 83% of the group with pelvic pain had abnormal pelvic organs as comp...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1984-11-01 00:00:00
abstract::Human placental cord blood contains a large number of hematopoietic progenitor cells, which could be used as a source of stem cells for the treatment of hematologic disorders and malignancies. Advantages of cord blood use include noninvasive collection, low risk for viral infection, and immunologic naivete. Cord blood...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/S0029-7844(96)00436-X
更新日期:1997-02-01 00:00:00
abstract::A well-developed corpus luteum was found at autopsy in a premature infant who died 26 hours post partum. Intrauterine pituitary-gonadal development and regulation are briefly reviewed and a possible mechanism of intrauterine fetal ovulation is presented. ...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1983-04-01 00:00:00
abstract::A thorough inspection of the pelvis for adhesions was made at the time of laparoscopic tubal sterilization in 2131 patients. Contraceptive use was then compared in women with adhesions (cases) and those without adhesions (controls). Current or previous intrauterine device (IUD) use was not associated with a statistica...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1988-02-01 00:00:00
abstract:OBJECTIVE:Women with a history of preeclampsia have an increased risk of developing chronic hypertension and cardiovascular disease. However, little is known about the mechanism responsible for vascular disease in formerly preeclamptic women. The aim of our study was to test whether preeclampsia predisposes to central ...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/AOG.0b013e31819caf0f
更新日期:2009-04-01 00:00:00
abstract:OBJECTIVE:To assess how a strategy to maximize access to emergency contraceptive pills would affect rates of pregnancy and sexually transmitted infections. METHODS:Sexually active women, 14-24 years old, were randomly assigned to two methods of access to emergency contraceptive pills: increased access (two packages of...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/01.AOG.0000235708.91572.db
更新日期:2006-11-01 00:00:00
abstract:OBJECTIVE:To investigate which second-trimester ultrasound markers for aneuploidy are the most diagnostically efficient in detecting fetal trisomy 21. METHODS:All second-trimester genetic sonograms performed since November 1, 1992 for women at increased risk for fetal trisomy 21 were analyzed retrospectively. Statisti...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(97)00152-x
更新日期:1997-06-01 00:00:00
abstract::The effect of an 8-hour, 3-dose perioperative regimen of cefazolin or placebo was evaluated in 97 patients. Postoperative morbidity occurred in 13 patients (27.1%) in the cefazolin group and in 17 patients (34.7%) who received placebo. The clinical sites of infection were similar in both groups except that wound infec...
journal_title:Obstetrics and gynecology
pub_type: 临床试验,杂志文章
doi:
更新日期:1978-09-01 00:00:00
abstract:OBJECTIVE:To evaluate the presence of fetal fibronectin in the cervix and vagina as a screening test for spontaneous preterm birth. METHODS:Two thousand nine hundred twenty-nine women at ten centers were routinely screened every 2 weeks from 22-24 to 30 weeks for cervical and vaginal fetal fibronectin. A positive test...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章,多中心研究
doi:10.1016/0029-7844(96)00035-x
更新日期:1996-05-01 00:00:00
abstract:OBJECTIVE:To determine whether preoperative ketoprofen and mesosalpinx infiltration, either alone or in combination, favorably influence postoperative recovery after outpatient laparoscopic sterilization. METHODS:In a double-blind, randomized, placebo-controlled study, 20 women received 100 mg of oral ketoprofen preop...
journal_title:Obstetrics and gynecology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/0029-7844(96)00222-0
更新日期:1996-10-01 00:00:00
abstract:OBJECTIVE:To explore the relationship between race and depression symptoms among participants in an early pregnancy loss clinical trial. METHODS:We performed a planned secondary analysis of a randomized trial by comparing treatments for medical management of early pregnancy loss. We hypothesized that Black participant...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/AOG.0000000000004212
更新日期:2021-01-01 00:00:00
abstract::Nine cases of condylomatous carcinoma (squamous cell carcinoma arising in condyloma acuminatum) of the vulva were studied for their clinical history, histopathology, and presence of human papillomavirus (HPV) DNA. Condylomatous carcinoma occurred primarily in an elderly population with a mean age of 70 years. There wa...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1988-07-01 00:00:00
abstract:OBJECTIVE:To determine whether severe preeclampsia is associated with genetic thrombophilic mutations or other types of thrombophilia. METHODS:A case-control study compared 63 consecutive women with severe preeclampsia evaluated at our institution between November 1997 and April 1999 with 126 control women matched for...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(00)00861-9
更新日期:2000-07-01 00:00:00
abstract:OBJECTIVE:To determine patient factors associated with hospital care costs for preterm labor and to develop a clinically applicable cost model for evaluating economic consequences of interventions to reduce preterm-labor hospitalizations. METHODS:Maryland state hospital discharge data from 1993-1996 were used to ident...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(00)00863-2
更新日期:2000-07-01 00:00:00
abstract:OBJECTIVE:To describe the human papillomavirus (HPV) genotype distribution in invasive vaginal cancers diagnosed before the introduction of the HPV vaccine and evaluate if survival differed by HPV status. METHODS:Four population-based registries and three residual tissue repositories provided formalin-fixed, paraffin-...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/AOG.0000000000000171
更新日期:2014-04-01 00:00:00
abstract:OBJECTIVE:To assess the efficacy and tolerability of ulipristal acetate, a selective progesterone receptor modulator, for treatment of symptomatic uterine leiomyomas. METHODS:This phase 3, double-blind, double-dummy, placebo-controlled trial randomized premenopausal women (18-50 years) with uterine leiomyomas and abno...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/AOG.0000000000002942
更新日期:2018-11-01 00:00:00
abstract:BACKGROUND:Combined deficiency of vitamin K-dependent coagulation factors (II, VII, IX, X) is an uncommon challenge for the expectant gravida. CASE:A 34-year-old primigravida had congenital combined deficiency of factors II, VII, IX, and X that were incompletely sensitive to vitamin K. She had an altered form of vitam...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(00)01214-x
更新日期:2001-05-01 00:00:00
abstract::Danazol is widely used in the management of endometriosis and mammary dysplasia. However, its mechanism of action is still obscure because of the few studies done and the controversial results obtained. Antigonadotropic activity has been postulated by some investigators, whereas others have observed no effect on the g...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1979-04-01 00:00:00
abstract:OBJECTIVE:To analyze the diagnostic accuracy and alteration in treatment planning from interinstitution (different institution) pathologic consultation. METHODS:We reviewed pathologic reports from 720 referred patients. The diagnosis rendered from a gynecologic pathologist was compared with the original diagnosis. Dis...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(98)00032-5
更新日期:1998-05-01 00:00:00
abstract:OBJECTIVE:To examine levels of serum tryptophan and its degradation product kynurenine in uncomplicated pregnancy, according to the week of pregnancy and the concentrations of neopterin. METHODS:Plasma was analyzed from 45 healthy pregnant women (15 in each trimester), 15 healthy puerperas, and 20 nonpregnant controls...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0029-7844(96)00084-1
更新日期:1996-07-01 00:00:00
abstract:OBJECTIVE:To assess the risks of congenital varicella syndrome and other birth defects in offspring of women who inadvertently received varicella vaccine during pregnancy or within 3 months of conception. METHODS:Pregnant women inadvertently exposed to varicella vaccine, reported voluntarily, were enrolled in the Preg...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(01)01384-9
更新日期:2001-07-01 00:00:00
abstract:BACKGROUND:Symptomatic hemophilia A is a rare disorder in females. Pregnancy and delivery in such women can be life threatening. Obstetric management is challenging and requires a multidisciplinary approach to ensure a good outcome. CASE:A woman with hemophilia A delivered by cesarean developed a deep vein thrombosis ...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/01.AOG.0000141648.05771.24
更新日期:2005-04-01 00:00:00
abstract::The preoperative clinical and radiologic findings and staging were compared with the operative and pathological findings and surgical staging in 62 consecutive patients with endometrial carcinoma. Overall, the tumor grade was changed in 33.8% of the patients, and the histologic type of tumor was changed in 27.4% of th...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1985-09-01 00:00:00
abstract:OBJECTIVE:To measure the contribution of genetic factors to selected pregnancy complications, including miscarriage, twinning, hypertension-toxemia, and nausea-vomiting. METHODS:Information on 22,241 pregnancies of 8675 female twins or spouses of male twins was obtained by questionnaire from members of the population-...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:1992-12-01 00:00:00
abstract:OBJECTIVE:To evaluate the methodology of the cost-effectiveness and cost-benefit literature in obstetrics and gynecology. DATA SOURCES:We performed a MEDLINE search of the general and subspecialty obstetrics and gynecology journals for the years 1990 through 1996. METHODS OF STUDY SELECTION:Original investigations in...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(97)00679-0
更新日期:1998-03-01 00:00:00
abstract:OBJECTIVE:To examine possible changes in cardiac function in fetuses of pregestational diabetic mothers. METHODS:We conducted a prospective longitudinal study of 31 women whose pregnancies were between 22 weeks' gestation and term, and who had pregestational diabetes. All diabetic women included in the study had glyco...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0029-7844(99)00003-4
更新日期:1999-06-01 00:00:00
abstract::Objective: To clarify the relationships between intrapartum chorioamnionitis and abnormalities of uterine function, including labor abnormalities, cesarean delivery, and hemorrhage during parturition.Methods: We did a retrospective cohort study on 16,226 deliveries between 1986 and 1996 that were identified from the U...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:
更新日期:2000-06-01 00:00:00
abstract:OBJECTIVE:To evaluate the prevalence of hepatitis B virus (HBV), hepatitis C virus (HCV), and human immunodeficiency virus (HIV) among pregnant women in Puerto Rico. METHODS:An anonymous serosurvey was conducted in four prenatal clinics in San Juan, Puerto Rico, involving women presenting consecutively for their first...
journal_title:Obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0029-7844(94)00319-9
更新日期:1995-01-01 00:00:00