Abstract：
:Vibroacoustic stimulation is widely used in the United States as a test for fetal well-being, yet little information is available on the adequacy of the electronic artificial larynx that is commonly used as the stimulator. To determine whether the intraabdominal sound pressure level was dependent on the static force applied to the electronic artificial larynx, we measured the sound pressure level at a position 20 cm from the surface of the anterior abdominal wall in nonpregnant ewes. The electronic artificial larynx was pressed against the surface with three levels of static force: mild, moderate, and strong. Between mild and strong static forces there was a trend toward a reduction in sound pressure level at the fundamental frequency (85 Hz) and the overtones (170 to 1600 Hz) (p less than 0.08). To further examine the relationship between the static force of sound source against the abdomen and the intraabdominal sound pressure level, sine wave oscillations between 20 Hz and 4.0 kHz were produced with an industrial shaker. With a constant dynamic force (0.16 N) applied to the shaker across frequencies, the sound pressure level was greatest at lower frequencies (100 to 110 dB) and less at higher frequencies, above 1.0 kHz (60 to 80 dB). Consistent with the electronic artificial larynx experiments, strong application of the shaker resulted in greater transmission of sound than did mild application (p less than 0.02).
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Graham EM,Peters AJ,Abrams RM,Gerhardt KJ,Burchfield DJdoi
10.1016/0002-9378(91)90602-nsubject
Has Abstractpub_date
1991-04-01 00:00:00pages
1140-4issue
4eissn
0002-9378issn
1097-6868pii
0002-9378(91)90602-Njournal_volume
164pub_type
杂志文章abstract：:A randomized prospective trial was performed to compare the efficacy and safety of ritodrine and indomethacin in the long-term treatment of preterm labor. Forty patients with intact membranes in preterm labor at 23 to 34 weeks' gestation were randomized to receive either intravenous ritodrine or oral indomethacin as t...
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：10.1016/0002-9378(91)90569-d
更新日期：1991-04-01 00:00:00
abstract：OBJECTIVE:The objective of the study was to identify prognostic and environmental factors associated with vulvar carcinoma in young women. STUDY DESIGN:This study was a review of patients younger than 45 years who were diagnosed with vulvar squamous cell carcinoma between 1994 and 2006. RESULTS:Fifty-six patients wer...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2009.01.014
更新日期：2009-06-01 00:00:00
abstract：:The maturation of the glomerular filtration rate (GFR) and the interrelationship between the GFR and the renal transport of sodium and chloride have been evaluated during the last trimester of gestation with the use of long-term experiments in fetal lambs. An increase in GFR (milliliters per minute) parallel to the in...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(77)90712-8
更新日期：1977-08-01 00:00:00
abstract：OBJECTIVE:We sought to investigate the safety and efficacy of laparoscopic incidental appendectomy during laparoscopic surgery for endometrioma. STUDY DESIGN:We conducted a retrospective study of 356 patients undergoing laparoscopic surgery for endometrioma with appendectomy (appendectomy group, n = 172) or not (nonap...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.08.042
更新日期：2011-01-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine the association of maternal psychotropic medication use during pregnancy with preterm delivery and other adverse perinatal outcomes. STUDY DESIGN:A cohort of 2793 pregnant women in Washington State was interviewed, and their medical files were abstracted. Logistic r...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2009.06.061
更新日期：2009-12-01 00:00:00
abstract：:Primary prevention of sexually transmitted diseases has received little emphasis in control programs. To evaluate the effectiveness of prevention strategies, we reviewed the world's literature on this topic. Use of condoms and spermicides greatly reduces the risk of gonorrhea, and barrier methods are practical and acc...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章,评审
doi：10.1016/0002-9378(86)90108-0
更新日期：1986-07-01 00:00:00
abstract：:In an attempt to establish the normal ratio of pulmonary artery to aorta diameters at varying gestational ages, the pulmonary artery and aorta diameters of 316 normally grown fetuses between 14 and 39 weeks' gestational age were measured. The ratios for each fetus were derived, and regression analysis was used to eval...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(91)90466-5
更新日期：1991-10-01 00:00:00
abstract：:Six patients having different subtypes of von Willebrand's disease were followed up during eight complete pregnancies. Two additional pregnancies terminated in spontaneous abortions. Five pregnancies ended in cesarean section either because of obstetric problems (three) or electively (two) to avoid infant bleeding. Th...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90290-5
更新日期：1986-09-01 00:00:00
abstract：OBJECTIVE:We sought to estimate mean costs of chemotherapy treatment for recurrent ovarian cancer with or without use of a chemoresponse assay. STUDY DESIGN:We estimated mean costs for 3 groups: (1) assay assisted: 75 women who received oncologist's choice of chemotherapy following chemoresponse testing (65% adherence...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2010.02.054
更新日期：2010-08-01 00:00:00
abstract：BACKGROUND:Controversy surrounds the definition of "normal" and "abnormal" labor. OBJECTIVE:In this study, we used contemporary labor charts to explore labor patterns in large obstetric population (2011-2016). STUDY DESIGN:Detailed information from electronic medical records of live singleton deliveries at term (≥37 ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.09.035
更新日期：2020-03-01 00:00:00
abstract：:Twenty-six pregnant women were given prophylactic heparin treatment because of previous thromboembolic complications. The mean duration of treatment was 25 weeks (range, 6 to 32 weeks). The amount of heparin was adjusted to a plasma concentration of 0.08 to 0.15 IU/ml, measured as anti-factor Xa activity. This effect ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90535-8
更新日期：1989-08-01 00:00:00
abstract：OBJECTIVE:The objective of the study was to investigate the differences in perinatal outcomes between various Asian ethnic subgroups at a national level. STUDY DESIGN:This is a retrospective cohort study of all non-Hispanic Chinese, Japanese, Filipino, Asian Indian, Korean, Vietnamese, Samoan, Guamanian, and Hawaiian ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2008.06.073
更新日期：2008-10-01 00:00:00
abstract：OBJECTIVE:Our aim was to study the association between severity of pelvic inflammatory disease at laparoscopy and the probability of achieving a live birth, while accounting for subsequent episodes of pelvic inflammatory disease. STUDY DESIGN:Beginning in 1960 a cohort of 1288 women in Lund, Sweden, who had clinical s...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(98)70534-4
更新日期：1998-05-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to investigate vascular reactivity in heterozygous and homozygous offspring with a genetic predisposition for hypertension after postnatal cross-fostering to mothers with the opposite genetic inheritance of the NOS3 knockout allele. STUDY DESIGN:Homozygous NOS3 knockout (C57BL/6...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2007.01.031
更新日期：2007-04-01 00:00:00
abstract：:Continuous follow-up of 224 patients treated for primary invasive squamous cell carcinoma of the vulva in a 20-year period (1955 to 1975) at the Mayo Clinic resulted in the detection of recurrent (or persistent) neoplasia in 59 (26%). Rates of treatment failure increased with advancing stage of disease-from 14% for St...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(82)90823-7
更新日期：1982-06-01 00:00:00
abstract：:The relationship of maternal amino acids, proteins, and certain other factors to fetal development (weight and cranial volume at birth and mental and motor scores at 8 months of age) was investigated in 129 gravidas. Maternal prepregnancy weight was significantly related to birth weight and cranial volume in the newbo...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(16)33441-x
更新日期：1975-10-15 00:00:00
abstract：OBJECTIVE:Our goal was to determine whether laparoscopic salpingostomy is preferable to laparoscopic methotrexate injection in the management of unruptured tubal gestation. STUDY DESIGN:Forty-eight patients with unruptured tubal pregnancy were prospectively randomized to either laparoscopic salpingostomy or laparoscop...
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：10.1053/ob.1996.v175.a74249
更新日期：1996-09-01 00:00:00
abstract：:Providing reliable prenatal screening performance estimates is critical for patient counseling and policy-making. Women who choose prenatal screening for aneuploidy are likely to be concerned not only with the common aneuploidies but with all causes of intellectual disability and serious birth defects. Sequential pren...
journal_title：American journal of obstetrics and gynecology
pub_type： 社论
doi：10.1016/j.ajog.2016.06.046
更新日期：2016-11-01 00:00:00
abstract：OBJECTIVE:Water absorption across the fetal chorioamniotic membranes is a critical regulatory pathway for amniotic fluid volume homeostasis. Aquaporins are cell membrane proteins that significantly enhance membrane permeability to water by acting as water channels. We recently demonstrated that aquaporin 8 is expressed...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2003.214
更新日期：2003-04-01 00:00:00
abstract：OBJECTIVE:This study was undertaken to test the null hypothesis that the number of striated muscle fibers in the ventral wall of the female urethra remains constant with increasing age. STUDY DESIGN:The urethra and surrounding tissues from 25 female cadavers, mean age 52 years (+/-SD 18, range 15-80 years), were selec...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.121089
更新日期：2002-03-01 00:00:00
abstract：OBJECTIVE:We sought to provide evidence-based guidelines regarding the diagnosis and management of amniotic fluid embolism. STUDY DESIGN:A systematic literature review was performed using MEDLINE, PubMed, EMBASE, and the Cochrane Library. The search was restricted to English-language articles published from 1966 throu...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,实务指引
doi：10.1016/j.ajog.2016.03.012
更新日期：2016-08-01 00:00:00
abstract：:Postoperative morbidity after hysterectomy was prospectively studied in 229 consecutive patients in our departments. The incidence of alcohol abuse (greater than 60 gm of alcohol daily) and social drinking (between 25 and 60 gm of alcohol daily) was 6.5% for each. When compared with the social drinkers and the control...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(92)91695-7
更新日期：1992-02-01 00:00:00
abstract：:Intrauterine infection with Candida albicans is a rare occurrence in pregnancy. We report the association of an intrauterine contraceptive device with such an infection in an asymptomatic patient. This infection, discovered incidentally at the time of genetic amniocentesis for advanced maternal age, resulted in a spon...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(88)90505-4
更新日期：1988-07-01 00:00:00
abstract：:Our subjects were 32 patients whose old complete perineal lacerations were repaired in the 10 hospitals in the South Hampton Roads Metropolitan area over a 20-year period. The layer technique of repair (26 patients) and the Warren flap procedure (6 patients) were used. Function improved in 24 of 26 patients (92%) with...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(88)80053-x
更新日期：1988-09-01 00:00:00
abstract：:Antisperm cell-mediated immunity has been associated with infertility in men and women. The purpose of this study was to determine whether the products of activated lymphocytes and macrophages (lymphokines and monokines) affect the fertilizing ability of human spermatozoa in the zona-free hamster egg penetration test....
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(89)90179-8
更新日期：1989-05-01 00:00:00
abstract：:This case report describes the antenatal diagnosis of a fetal pulmonary anomaly. Early detection afforded detailed parental counseling and prompt neonatal diagnosis and treatment. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90433-8
更新日期：1985-01-01 00:00:00
abstract：:The cancer antigen CA 125 is manifest by serous cystadenocarcinoma of the ovary and to a lesser extent by other gynecologic and nongynecologic tumors. Its presence was screened for in normal human fetal tissues and fluids. Appreciable quantities of CA 125 were discovered in amniotic fluid by both a dot blot assay and ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(86)90076-1
更新日期：1986-07-01 00:00:00
abstract：:Over 2,148 cycles of midcycle oral administration of R 2323 (50 mg. per day on Days 15,16, and 17), the authors recorded a drug-failure pregnancy rate of 5 per cent and an unusually regular cycle length of 28 +/- 2 days. During this trial, endometrial biopsies obtained in the luteal phase were examined by light and el...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：10.1016/0002-9378(76)90807-3
更新日期：1976-08-15 00:00:00
abstract：:Virilization in pregnancy has been reported with various ovarian neoplasms. Presented is a case of maternal virilization resulting from an unclassified sex-cord stromal neoplasm. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90627-1
更新日期：1985-07-01 00:00:00
abstract：:The gonadotropin-releasing hormone antagonist offers several advantages over the use of the agonist and allows several physiologic questions to be addressed. In this study, we evaluated the ability of Nal-Glu to acutely inhibit the luteinizing hormone surge and prevent ovulation. We also assessed whether recovery of t...
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：10.1016/0002-9378(91)90037-r
更新日期：1991-12-01 00:00:00
