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Biomedical subjects

Shlomit Riskin-Mashiah

Publications and source records attributed to Shlomit Riskin-Mashiah.

16 recordsLinked to original sources

Preconception care--when and what: the attitude of Israeli gynaecologists to preconception counseling.

OBJECTIVES: Preconception care is a form of preventive care and its implementation might improve general women's health as well as improving pregnancy outcome. Our aim was to survey the attitudes of Israeli gynecologists regarding preconception counseling. METHODS: E-mailed questionnaires were sent to gynecologists in an Israeli gynecology network. The questionnaire included two identical sets of questions; one was regarding the care of reproductive aged women who visit their gynecologist for various reasons and the second was regarding the care of women in their first prenatal visit. Answers were scored (from 3-always to 0-never), summed and compared using Chi-square and paired t tests. RESULTS: Mean score for the preconception set was significantly lower than the prenatal set 11.3 (62.7%) versus 16.9 (93.7%) respectively, P < 0.001. Folic acid supplementation and genetic screening tests were recommended to most women in 99 and 94% of first prenatal care visit compared to only 42 and 62% of women who were not pregnant (P < 0.001). CONCLUSIONS: Gynecologists fail to recognize proper opportunities for preconception care. Increased awareness and concrete guidelines concerning timing and content of preconception counseling might be helpful.

Attitude of Health Personnel↗

The anuric preterm newborn infant with a normal renal ultrasound: a diagnostic and ethical challenge.

Diagnosis and treatment of an anuric premature infant with severe respiratory compromise and a normal renal ultrasound (US), is a difficult task that requires a multidisciplinary approach. A 29-week gestation premature male infant, born after 5 weeks of worsening oligohydramnios, was ventilated for respiratory distress and remained anuric. Intensive clinical investigations and pediatric nephrology consultation that predicted very poor prognosis were followed by progressive renal failure, electrolyte imbalance, respiratory failure, ventricular arrhythmia, and finally cardiac arrest and death on day 5. In view of the predicted poor outcome, and after discussion with the parents, a decision was made not to start peritoneal dialysis (PD), and to offer only palliative therapy, with comfort care alone. Pre and postnatal diagnosis lead, in this case, to an ethical challenge that focuses on the question of futility.

Anuria↗

Cerebrovascular hemodynamics in chronic hypertensive pregnant women who later develop superimposed preeclampsia.

OBJECTIVE: We have previously shown that normotensive pregnant women who later develop preeclampsia demonstrate lower baseline pulsatility index (PI) and resistance index (RI) but normal vasodilatory responses to stimulation tests. In the current study, we tested the hypothesis that women with chronic hypertension who later developed superimposed preeclampsia behave similarly. METHODS: Transcranial Doppler ultrasound was performed on 17 women with chronic hypertension during the second trimester of pregnancy to measure middle cerebral artery (MCA) velocities. Superimposed preeclampsia developed in seven patients (SUPER group) while the rest did not develop preeclampsia (CHT group). Measurements were performed in the left lateral position at baseline on room air, during 5% CO2 inhalation, and during a 2-minute isometric handgrip test. Blood pressure, heart rate, O2 saturation, and end-tidal PCO2 were recorded with each Doppler measurement. Mean PI, RI, and cerebral perfusion pressure (CPP) at each time were compared using two-way repeated measures analysis of variance. Statistical significance was set at P < .05. RESULTS: The women who developed superimposed preeclampsia did this an average of 8.7 +/- 1.3 weeks after the study. MCA PI and RI were lower, and CPP higher, in the SUPER group compared to the CHT group (0.64, 0.46, and 80.7 vs 0.74, 0.51, and 63.6, respectively; P < .05). Both maneuvers caused reduction in MCA PI and RI in both groups, whereas CPP increased only in the SUPER group. CONCLUSIONS: These findings suggest that women destined to develop preeclampsia have cerebral hemodynamic changes that predate the development of overt preeclampsia.

Adult↗

Preeclampsia is associated with global cerebral hemodynamic changes.

OBJECTIVE: To compare blood flow-velocity parameters in the anterior and posterior cerebral arteries between normotensive and preeclamptic pregnant women. METHODS: Transcranial Doppler ultrasound was used to measure peak, end-diastolic, and mean velocities in the anterior cerebral artery (ACA) and posterior cerebral artery (PCA) of 22 normotensive and 12 preeclamptic women in the third trimester. All measurements were performed with the subject in the left lateral position. Blood pressure and heart rate were recorded with each Doppler measurement. The mean pulsatility index (PI), resistance index (RI), and cerebral perfusion pressure for each artery was averaged and compared. Statistical significance was set at P <.05. RESULTS: Preeclamptic women had higher cerebral perfusion pressure in both ACA and PCA (64.7 +/- 5.9 and 78.1 +/- 7.6 compared with 42.4 +/- 2.6 and 54.1 +/- 4.1 mmHg, P <.05), lower PI (0.83 +/- 0.05 and 0.71 +/- 0.04 compared with 0.96 +/- 0.04 and 0.84 +/- 0.02, P <.05), and lower RI (0.55 +/- 0.02 and 0.49 +/- 0.02 compared with 0.60 +/- 0.02 and 0.55 +/- 0.01, P <.05) than normotensive pregnant women. CONCLUSION: Preeclamptic patients have globally elevated cerebral perfusion pressure and lower resistance in the cerebral circulation than normotensive pregnant women.

Adult↗

Cesarean section, gestational age, and transient tachypnea of the newborn: timing is the key.

The purpose of this study was to identify risk factors and to characterize infants with transient tachypnea of the newborn (TTN). A total of 67 newborns with TTN, born at gestational age (GA)>or=35 weeks, were studied. Newborns delivered before and after each study case served as controls. Mean GA was lower and cesarean section (CS) rate was higher in the TTN group (38.2+/-2.3 versus 39.5+/-1.4 weeks, p<0.001; 50.7% versus 22.4%, p<0.001). GA<38 weeks was found to be associated with increased risk for TTN in infants delivered by elective CS. TTN was associated with significant morbidities and longer hospital stay (7.2+/-5.6 versus 2.9+/-1.4 days; p<0.001). Delivery by CS and younger GA are risk factors for TTN. Although TTN is a self-limited disease, it is associated with significant morbidities. Scheduling elective CS at GA of not less than 38 weeks may decrease the frequency of TTN.

Cesarean Section↗

Side-to-side differences in transcranial Doppler parameters in normotensive and preeclamptic pregnant women.

OBJECTIVE: This study was undertaken to investigate whether women with preeclampsia demonstrate larger side-to-side velocity differences in the middle cerebral artery (MCA) compared with normotensive pregnant women. STUDY DESIGN: Forty-one preeclamptic women and 50 normotensive pregnant women were studied during the third trimester. Transcranial Doppler ultrasound was used to measure peak, end-diastolic, and mean velocities in both MCAs. An asymmetry index was calculated as 100 x Rt-Lt//(Rt+Lt)/2, for each of the following parameters: mean velocity (Vm), pulsatility index (PI), and cerebral perfusion pressure (CPP). Student t test, Pearson correlation, and regression analysis were used. Significance was taken as P<.05. RESULTS: Both normotensive and preeclamptic pregnant women showed good correlation between Rt and Lt MCA Vm (R>0.8, P<.0001), PI (R>0.6, P.0001), and CPP (R>0.8, P<.0001). There were no differences in the asymmetry index for Vm, PI, or CPP between the two groups. CONCLUSION: Preeclampsia does not appear to induce greater side-to-side velocity differences in the MCA distribution.

Adult↗

Cerebrovascular hemodynamics in pregnant women with mild chronic hypertension.

OBJECTIVE: To evaluate and compare the cerebrovascular autoregulation in pregnant normotensive and mild chronic hypertensive patients without preeclampsia. METHODS: Transcranial Doppler ultrasound was used to measure peak, end-diastolic, and mean velocities in the middle cerebral arteries of 34 normotensive and 17 mild chronic hypertensive women in the third trimester of pregnancy. Measurements were performed in the left lateral position at baseline, during 5% CO(2) inhalation, and during an isometric handgrip test. Mean pulsatility index, resistance index, and cerebral perfusion pressure at each time were compared using 2-way repeated measures analysis of variance. Using an alpha error of 5%, the statistical power to identify differences in middle cerebral artery indices in response to the two maneuvers was at least 90% and 50% in comparison between the two groups. Significance was P <.05. RESULTS: Pregnant women with mild chronic hypertension had higher baseline mean blood pressure but similar pulsatility index (0.73 versus 0.75), resistance index (0.50 versus 0.50), and cerebral perfusion pressure (59.9 versus 61.8 mm Hg) compared with normotensive pregnant women. Both maneuvers caused a significant reduction in pulsatility index and resistance index and higher cerebral perfusion pressure. No significant differences were noted in the response to either 5% CO(2) inhalation or isometric handgrip test between the two groups. CONCLUSION: Pregnant women with mild chronic hypertension show normal cerebral vasomotor reactivity to CO(2) breathing and isometric handgrip. This suggests that the abnormal cerebrovascular autoregulation in preeclampsia is not directly linked to the elevated blood pressure but rather is determined by a separate pathophysiologic pathway. LEVEL OF EVIDENCE: II-2

Adult↗

The relationship between delivery mode and mortality in very low birthweight singleton vertex-presenting infants.

OBJECTIVE: To investigate the factors associated with caesarean delivery and the relationship between mode of delivery and mortality in singleton vertex-presenting very low birthweight (< or = 1500 g) live born infants. DESIGN: Observational population-based study. SETTING: Data collected from all 28 neonatal departments comprise the Israel National Very Low Birth Weight Infant Database. POPULATION: 2955 singleton vertex-presenting very low birthweight infants registered in the database from 1995 to 2000, and born at 24-34 weeks of gestation. METHODS: The demographic, obstetric and perinatal factors associated with caesarean delivery and subsequent mortality were studied. The independent effect of the mode of delivery on mortality was tested by multiple logistic regression. MAIN OUTCOME MEASURE: Mortality was defined as death prior to discharge. RESULTS: Caesarean delivery rate was 51.7%. Caesarean delivery was directly associated with increasing maternal age and gestational age, small for gestational age infants, maternal hypertensive disorders and antepartum haemorrhage, and was inversely related to premature labour and prolonged rupture of membranes. Factors associated with increased survival were increasing gestational age, antenatal corticosteroid therapy, maternal hypertensive disorders and no amnionitis. Mortality rate prior to discharge was lower after caesarean delivery (13.2% vs 21.8%), but in the multivariate analysis, adjusting for the other risk factors associated with mortality, delivery mode had no effect on infant survival (OR 1.00, 95% CI 0.74-1.33). In a subgroup with amnionitis, a protective effect of caesarean delivery was found. CONCLUSIONS: Caesarean delivery did not enhance survival of vertex-presenting singleton very low birthweight babies. Caesarean delivery cannot be routinely recommended, unless there are other obstetric indications.

Cesarean Section↗

[Preconception counseling--for all].

Preconception counseling is a form of preventive medicine that consists of three main components: risk assessment, health promotion and intervention. As such, it is probably the most important prenatal visit for the prevention of birth defects. All reproductive-age women should be considered at risk for pregnancy and be advised about anticipatory activities that are important in periconception care. This includes folic acid supplementation, rubella and hepatitis B immunization, avoiding tobacco, alcohol and substance abuse, instructions for appropriate nutrition and weight, avoiding teratogens such as organic solvents, pesticides and ionizing radiation, and genetic carrier screening depending on their ethnicity. Women with chronic disease should be evaluated concerning its effect on pregnancy and therapy should be optimized. Also, women with bad obstetric history including preeclampsia, intrauterine fetal death, intrauterine growth restriction, recurrent abortions, preterm deliveries or congenital malformations should be evaluated and counseled prior to another pregnancy.

Counseling↗

Risk factors for severe perineal tear: can we do better?

Our aim was to investigate the risk factors associated with severe perineal tears defined as either third- or forth-degree tears and, ultimately, find strategies for prevention. We carried a retrospective analysis of a computerized perinatal database, collected prospectively, from a single county hospital between January 1, 1993 and June 30, 1998. Singleton vaginal vertex deliveries were analyzed for potential risk factors using univariate and multiple logistic regression analysis including all two-way interactions. Severe perineal tear occurred in 1905 (8.2%) of 23,244 vaginal deliveries. In the multiple logistic regression analysis, the following factors carried a significantly higher risk for severe laceration: midline episiotomy, primary vaginal delivery, use of pudendal block, forceps deliveries, and birth weight more than 4000 g. The study of interactions demonstrated that mediolateral episiotomy was associated with an increased risk for severe tear only during the first vaginal delivery, but not during a repeat vaginal delivery. Our data suggest that primary vaginal delivery, fetal weight above 4000 g, and the use of pudendal analgesia can help identify in advance patients at highest risk for severe perineal tear. During the delivery of these patients usage of vacuum (instead of forceps) and restricting the use of midline episiotomy might reduce the incidence of severe perineal tear. In cases where episiotomy seems crucial, the use of a mediolateral episiotomy may reduce the likelihood of severe perineal tear.

Adolescent↗

Transcranial doppler measurement of cerebral velocity indices as a predictor of preeclampsia.

OBJECTIVE: We have previously shown that women with preeclampsia demonstrate cerebral hyperperfusion and abnormal cerebrovascular autoregulation. In the current study, we tested the hypothesis that abnormal cerebrovascular function can be detected before the clinical onset of preeclampsia. STUDY DESIGN: Transcranial Doppler ultrasonography was performed for 166 women in the second trimester of pregnancy to measure peak, end-diastolic, and mean velocities in the middle cerebral arteries. Preeclampsia developed in 10 patients who were initially normotensive. In a nested case-controlled design, each patient with preeclampsia who was initially normotensive was matched for gestational age at the time of initial examination, maternal age, and parity with two pregnant women who remained normotensive and who were delivered at term. All measurements were performed with the subject in the left lateral position at baseline, during 5% carbon dioxide inhalation, and during a 2-minute isometric handgrip test. Blood pressure, heart rate, oxygen saturation, and end-tidal PCO (2) were recorded with each Doppler measurement. The mean pulsatility index, resistance index, and cerebral perfusion pressure at each time were calculated and compared. Statistical significance was set at a probability value of <.05. RESULTS: The studies were performed at 19 to 28 weeks of gestation. Preeclampsia developed an average of 13.6 +/- 1.0 weeks after the study. Baseline mean blood pressure and heart rate were similar, but middle cerebral arteries pulsatility and resistance indices were lower in the women with preeclampsia who were initially normotensive compared with the pregnant women who were normotensive (0.83 and 0.54 vs 0.73 and 0.50, respectively; P <.05). Both maneuvers caused a significant reduction in the pulsatility and resistance indices. With the use of baseline values as covariates, no significant differences were noted in the response to either carbon dioxide inhalation or handgrip between the group of women who remained normotensive and the group of women with preeclampsia who were initially normotensive. CONCLUSION: Normotensive pregnant women who later have preeclampsia demonstrate lower baseline pulsatility and resistance indices but normal vasodilatory responses to challenge tests. These findings suggest that women who are destined to have preeclampsia experience cerebral hemodynamic changes that predate the development of overt preeclampsia symptoms.

Adult↗

Auricular mild errors of morphogenesis: epidemiological analysis, local correlations and clinical significance.

BACKGROUND: The mild errors or morphogenesis (MEMs) are well known and accepted markers of alterations in embryonic development with predictive value in identification of major malformations, specific genetic syndromes, metabolic and psychiatric disease and childhood malignancy. OBJECTIVE: The goal of this study was to assess the contribution of auricular MEMs as part of total MEMs in an effort to study the factors influencing the different potential informative value of different types of MEMs and their variability with perinatal factors. METHOD: Three thousand one hundred and seven consecutive born neonates were screened for auricular and non-auricular MEMs, inregistered concomitantly with major malformations and postural defects. The study was accomplished by our specially designed computerized program in a relatively large nonhomogeneous ethnic population, in the metropolitan area of Haifa, Israel. RESULTS: The general prevalence of auricular MEMs was 43.1%; the most frequent pathogenetic type was the postural one. Significantly higher rates of auricular MEMs were associated with male sex, small- and large-for-gestational age, IVF pregnancy, triplet pregnancy, maternal diabetes and parental consanguinity. CONCLUSION: We conclude that the presence, number, and association or concomitance of auricular MEMs in the same neonate may have important clinical, diagnostic, pathogenetic, screening, and therapeutic value.

Abnormalities, Multiple↗

Auricular mild errors of morphogenesis: epidemiological study with application of a targeted computer program.

Mild errors of morphogenesis (MEMs) are findings of great importance in multiple fields because of their predictive value in identification of major malformations, specific genetic syndromes, mental retardation and childhood malignancy. In order to evaluate the contribution of auricular MEMs, we constructed a computerized program, especially designed for the recording of auricular MEMs in connection with nonauricular MEMs, personal data, family, pregnancy and birth history, presence of major malformation and postural defects. The program is easy to use and delivers, at request, immediate information regarding prevalence of each auricular MEM and percentage associations between all variables. In the period from January 1, 1999 to December 31, 1999, we screened 3107 consecutively born neonates and recorded auricular and nonauricular MEMs, detected by surface examination. The general prevalence of auricular MEMs was 43.2% and the most frequent MEMs and their associates were of postural-type. This computerized program offers many advantages for the study of ear MEMs.

Computer Simulation↗