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Biomedical subjects

M Mazor

Publications and source records attributed to M Mazor.

At least 73 records · Page 4Linked to original sources
PubMed1988

Puerperal adynamic ileus.

Puerperal adynamic ileus includes acute mild and severe clinical manifestations. Acute severe puerperal adynamic ileus may constitute the clinical indication of a serious underlying disease, such as sepsis, rupture of uterus, intra-abdominal or retroperitoneal bleeding, ureteral pathology, intra-abdominal foreign body and internal diseases. Sometimes the diagnosis requires abdominal and chest X-ray, uterine exploration and intravenous pyelography. Surgical treatment requires proper previous general evaluation; and fluids, electrolytes and plasma should be provided.

Adult↗
PubMed1988

Blood supply to the uterus in preeclampsia.

Uterine fundal and low segment arcuate artery velocimetry was studied in normal pregnant women and in severe preeclamptic patients. The waveform velocity of the preeclamptic group revealed large differences between systole and diastole, as well as an increased resistance index. Furthermore, the abnormality was more severe in the fundal than in the low segment arcuate measurement.

Adult↗
PubMed1988

Amniotic fluid 5-hydroxyeicosatetraenoic acid in preterm labor.

5-Hydroxyeicosatetraenoic acid (5-HETE) is an arachidonate lipoxygenase product capable of stimulating human uterine contractility in a dose-dependent manner in vitro. The purpose of this study was to determine if preterm labor is associated with changes in the concentration of this metabolite in amniotic fluid. Amniotic fluid was obtained by transabdominal amniocentesis from three groups of women with preterm labor: group 1 - women without intraamniotic infection who responded to tocolysis (n = 32); group 2 - women without intraamniotic infection who failed to respond to tocolysis (n = 22); and group 3 - women with intraamniotic infection (n = 14). 5-HETE was determined by radioimmunoassay. The median amniotic fluid concentration of 5-HETE in women who responded to tocolysis (median = 1412 pg/ml; range: 111-3547) was significantly lower than in women who delivered despite tocolysis (median = 2052 pg/ml; range: 136-7774) and women with intraamniotic infection (median = 1876 pg/ml; range: 543-7033) [p less than 0.05]). No difference in amniotic fluid concentrations' of 5-HETE were found between women in groups 2 and 3 (p greater than 0.05).

Adult↗
PubMed1988

Amniotic fluid prostaglandin E2 in preterm labor.

These studies were designed to determine amniotic fluid concentrations of prostaglandin E2 (PGE) in women with preterm labor. Amniotic fluid was retrieved by transabdominal amniocentesis from 68 women with preterm labor (less than 37 weeks). Patients were divided into three groups according to the response to tocolysis and the presence or absence of an intraamniotic infection. Amniotic fluid concentrations of PGE2 were significantly greater in women with preterm labor and intraamniotic infection than in women without infection. Patients unresponsive to tocolysis without intraamniotic infection had a significantly greater concentration of PGE2 in amniotic fluid than those responsive to tocolysis.

Adult↗
PubMed1988

Increased amniotic fluid leukotriene C4 concentration in term human parturition.

The purpose of this study was to determine whether parturition is associated with changes in the amniotic fluid concentration of leukotriene C4, an arachidonate lipoxygenase metabolite. Amniotic fluid was collected from 36 women not in labor and from 30 women in active labor with cervical dilation of greater than or equal to 6 cm. The concentration of leukotriene C4 was determined by radioimmunoassay. The median amniotic fluid concentration of leukotriene C4 was greater in laboring women than in nonlaboring women: 121 pg/ml (range, 52 to 261 pg/ml) versus 73.5 pg/ml (range, 6 to 249 pg/ml), respectively (p = 0.0008). These data are consistent with activation of the lipoxygenase pathway during spontaneous parturition at term.

Amniotic Fluid↗
PubMed1988

Evidence for a local change in the progesterone/estrogen ratio in human parturition at term.

The purpose of this study was to determine if a local change in the concentrations of estrogen and progesterone occurs in the amniotic fluid during human parturition at term. Amniotic fluid was retrieved from 20 women in active labor and from 20 women not in labor. Patients were matched for maternal age and gestational age. Estradiol, estriol, progesterone, and dehydroepiandrosterone sulfate were measured in amniotic fluid by radioimmunoassay. For women in active labor, the median concentrations (range) of these steroid hormones were 2.4 ng/ml (1 to 9.2 ng/ml), 1661.2 ng/ml (556.6 to 3928.1 ng/ml), 12.3 ng/ml (4.7 to 41.4 ng/ml), and 187.5 ng/ml (61.2 to 470 ng/ml), respectively. The median concentrations (range) for women not in labor were 1.6 ng/ml (0.3 to 5.7 ng/ml), 684.2 ng/ml (70.6 to 2103.1 ng/ml), 13.2 ng/ml (7.5 to 63 ng/ml), and 65.6 ng/ml (20 to 334 ng/ml), respectively. Thus spontaneous human parturition at term was associated with significantly increased amniotic fluid concentrations of estradiol, estriol, and dehydroepiandrosterone sulfate (p = 0.02, p = 0.002, p = 0.003, respectively). The progesterone/estrogen ratios (progesterone/estradiol and progesterone/estriol) were significantly lower for women in active labor compared with those not in labor (p = 0.002 and p = 0.0006, respectively). We conclude that a local change in the progesterone/estrogen ratio occurs during human parturition at term.

Amniotic Fluid↗
PubMed1988

Intraamniotic infection and the onset of labor in preterm premature rupture of the membranes.

The purpose of this study was to examine the relationship between intraamniotic infection and the onset of labor in patients with preterm premature rupture of the membranes. Two hundred and thirty consecutive patients were admitted with premature rupture of the membranes to Yale-New Haven Hospital from January 1985 to July 1987. Amniotic fluid was retrieved by amniocentesis from 96% (221/230). Sixty-one patients were in labor on admission (27.6%, 61/221) and 39% of them (24/61) had a positive amniotic fluid culture. Patients in labor on admission were more likely to have a positive amniotic fluid culture than those who were not in labor on admission (24/61 versus 41/160, p = 0.049). Of the 160-patients who were not in labor on admission, 81 subsequently went into spontaneous labor; microbiologic information at the time of labor was known in 48 of these patients (59.2%). Seventy-five percent (36/48) of these patients had a positive amniotic fluid culture. The incidence of intraamniotic infection in quiescent women who subsequently went into labor was higher than that of patients admitted in active labor (75% versus 39%, p = 0.0004). These results provide a basis for the clinical impression that the onset of labor in women with preterm premature rupture of the membranes is associated with a subclinical intraamniotic infection. The mechanisms responsible for the onset of labor in women without an intraamniotic infection may be associated with an extraamniotic infection (e.g., deciduitis) or a noninfectious process.

Amniotic Fluid↗
PubMed1988

Fetal body and breathing movements as predictors of intraamniotic infection in preterm premature rupture of membranes.

A prospective study of fetal behavior in cases complicated with preterm premature rupture of membranes was conducted in 41 patients. The length of time and the number of fetal breathing and gross body movements were correlated with the amniotic fluid culture results. An episode of fetal activity (body movements and breathing movements) of greater than or equal to 30 seconds during 30 minutes of observation was associated with the absence of intraamniotic infection in 100% of the cases. On the other hand, the absence of fetal breathing movements and gross body movements of less than a 50 second duration during 30 minutes of observation was associated with positive amniotic fluid cultures in all cases. If an episode of fetal breathing movements was present but lasted less than 30 seconds and/or the total time of gross body movements was greater than 50 seconds, 64% of patients had an intraamniotic infection.

Amniocentesis↗
PubMed1988

The value of the leukocyte esterase test in diagnosing intra-amniotic infection.

This communication examines the diagnostic value of the leukocyte esterase activity (LEA) test in the detection of intra-amniotic infection. Amniotic fluid from 171 consecutive patients with premature rupture of membranes (n = 149) and preterm labor (n = 22) was obtained through amniocentesis. Gram stain, bacterial and mycoplasma cultures, and LEA tests were performed. The LEA had a sensitivity of 19%, a specificity of 86.7%, a positive predictive value (PPV) of 42.3% and a negative predictive value (NPV) of 67.6% in the prediction of a positive amniotic fluid culture (prevalence of positive cultures = 33.9%). The Gram stain had a sensitivity of 36.2%, specificity of 94.7%, PPV of 77.8%, and NPV of 74.3%. When both tests were combined, a significant increase in sensitivity to 50% was observed. This was associated with a drop in specificity to 81.4%. There was a correlation between the number of white blood cells in the amniotic fluid and the result of the LEA test. A positive LEA assay was associated with an increased likelihood of postpartum endometritis, but not with clinical chorioamnionitis or neonatal infectious morbidity.

Amniocentesis↗
PubMed1988

A critical appraisal of fetal acoustic stimulation as an antenatal test for fetal well-being.

Fetal acoustic stimulation is becoming a common modality for antepartum testing. The purpose of this study was to review the available literature on the subject to establish whether safety and efficacy have been determined. Safety could not be substantiated. The frequency, intensity, duration, and number of stimuli varied greatly among publications. There is no uniform nomenclature to score test results, and even the definition of the fetal acoustic stimulation test is not uniform. Data on the efficacy of the test are limited. Before fetal acoustic stimulation becomes part of standard obstetric care, rigorous clinical testing is required.

Acoustic Stimulation↗
PubMed1988

Reduction or cessation of fetal movements after administration of steroids for enhancement of lung maturation. I. Clinical evaluation.

Changes in fetal activity ranging from reduction to cessation of fetal movements were observed in patients at the 25th to 34th week of gestation, who were receiving steroids for enhancement of fetal lung maturation. This was a transient phenomenon, and fetal movements returned to normal by 24 h after the last injection of steroids. Concomitantly, during the period of exposure to steroids, we found an increased incidence of nonreactive monitoring patterns on daily analysis of fetal heart monitoring tracing. Although the pathophysiology of these changes is still unclear, we believe that the practical value of this observation is of importance. Reduction or cessation of fetal movements and a nonreactive nonstress test are generally accepted signs of fetal compromise and considered as an indication for termination of pregnancy. In this selective group of patients this is a temporary phenomenon; therefore, conservative management would seem in order.

Betamethasone↗
PubMed1988

The clinical value of gas-liquid chromatography in the detection of intra-amniotic microbial invasion.

Short-chain organic acids are byproducts of bacterial metabolism, and their detection by gas-liquid chromatography (GLC) in amniotic fluid has been proposed as a rapid, sensitive, and specific method for the diagnosis of infection. This study was conducted to determine whether GLC analysis of amniotic fluid would be helpful in a population of women in whom the Gram stain examination was negative. Amniotic fluid was retrieved by transabdominal amniocentesis from three groups of patients. Group 1 (negative control) contained 14 women with term pregnancies without clinical and microbiologic evidence of infection of the amniotic cavity; group 2 (positive control) included 17 women with a positive Gram stain examination and culture of amniotic fluid; group 3 (study group) comprised 25 women at risk for intra-amniotic infection who had a negative Gram stain of amniotic fluid. None of the patients in group 1 and 16 of 17 patients (94.1%) in group 2 had pathologic short-chain organic acids in the amniotic fluid. Seven of the 25 patients in group 3 had a positive amniotic fluid culture and only two had an abnormal GLC pattern. Of the remaining 18 patients with negative amniotic fluid cultures, eight had abnormal GLC results. In group 3, the sensitivity of GLC was 28.5% and the specificity was 55.5%. Gas-liquid chromatographic analysis of amniotic fluid has limited clinical value in the prediction of amniotic fluid culture when the Gram stain examination is negative.

Amniocentesis↗
PubMed1987

Pregnancy complicated by Cushing's syndrome.

A case of Cushing's syndrome in pregnancy due to adrenal adenoma is described. Despite the poor prognosis and the fact that treatment was delayed until after delivery, a normal term infant was born and maternal outcome was good.

Adenoma↗
PubMed1987

Abortion caused by electrical current.

A case of electrical accident in a pregnant woman at 9 weeks of gestation is described. No fetal heart activity was noted immediately after the injury, and spontaneous abortion occurred two days later.

Abortion, Spontaneous↗