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Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(8):460-466
DOI 10.1590/S0100-72032006000800004
PURPOSE: to assess the performance of lamellar body count compared to the shake (Clements) test in the prediction of fetal lung maturity in diabetics. METHODS: prospective study of 62 patients who underwent amniocentesis between the 26th and 39th week of pregnancy. Immediately after collection, the amniotic fluid sample was submitted to the shake test and lamellar body count. Deliveries occurred within three days of amniocentesis. Immature test results (absence of a complete bubble ring in the third tube for the shake test and less than 50,000 lamellar bodies) were confronted with the occurrence of pulmonary immaturity in the neonate (respiratory distress syndrome). The performance of both tests was compared using the chi2 test and p<0.05 was considered to be significant. RESULTS: seven infants had respiratory distress syndrome (11.3%). The lamellar body count and shake test were similar regarding sensitivity (100 vs 71.4%, respectively) and negative predictive value (100 vs 93.5%). Lamellar body count was superior as regards specificity (87.3 vs 52.7%, p=0.0001), positive predictive value (50 vs 16.1%, p=0.017), and accuracy (88.7 vs 54.8%, p<0.001). CONCLUSIONS: lamellar body count is a simple and accurate method of assessing fetal lung maturity. It performs slightly better than the shake test in terms of specificity, positive predictive value and accuracy, with the advantage of not requiring manipulation or reagents. Similar to the shake test, lamellar body count has a high-negative predictive value: mature results (50,000 or more) indicate thar the infant will not have hyaline membrane.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2006;28(8):460-466
DOI 10.1590/S0100-72032006000800004
PURPOSE: to assess the performance of lamellar body count compared to the shake (Clements) test in the prediction of fetal lung maturity in diabetics. METHODS: prospective study of 62 patients who underwent amniocentesis between the 26th and 39th week of pregnancy. Immediately after collection, the amniotic fluid sample was submitted to the shake test and lamellar body count. Deliveries occurred within three days of amniocentesis. Immature test results (absence of a complete bubble ring in the third tube for the shake test and less than 50,000 lamellar bodies) were confronted with the occurrence of pulmonary immaturity in the neonate (respiratory distress syndrome). The performance of both tests was compared using the chi2 test and p<0.05 was considered to be significant. RESULTS: seven infants had respiratory distress syndrome (11.3%). The lamellar body count and shake test were similar regarding sensitivity (100 vs 71.4%, respectively) and negative predictive value (100 vs 93.5%). Lamellar body count was superior as regards specificity (87.3 vs 52.7%, p=0.0001), positive predictive value (50 vs 16.1%, p=0.017), and accuracy (88.7 vs 54.8%, p<0.001). CONCLUSIONS: lamellar body count is a simple and accurate method of assessing fetal lung maturity. It performs slightly better than the shake test in terms of specificity, positive predictive value and accuracy, with the advantage of not requiring manipulation or reagents. Similar to the shake test, lamellar body count has a high-negative predictive value: mature results (50,000 or more) indicate thar the infant will not have hyaline membrane.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):425-430
DOI 10.1590/S0100-72032003000600007
PURPOSE: to determine whether prenatal sonographic findings and uterine contractions can predict neonatal motor outcome in fetuses with open spina bifida. METHODS: we evaluated retrospectively 53 fetuses with open spina bifida from 1993 to 2001. These fetuses were born and followed-up at the fetal medicine units of the Hospital São Paulo ("Universidade Federal de São Paulo") and the "Hospital Santa Joana". The influence of the alterations observed through ultrasound scan on neonatal muscular strength (macrocrania, microcrania, level of the spinal column opening, clubfoot and type of fetus position) was evaluated. The influence of uterine contractions on neonatal motor outcome was also evaluated. All deliveries were made through cesarian section. c² and Fisher tests were used for categorical comparisons. A p<0.05 was considered significant. RESULTS: Fifty-three cases of isolated open spina bifida were studied. Alterations of the cranial circumference size and the level of the lesion did not interfere in the neonatal motor perfomance. However, clubfoot and breech position showed to be predictors of an unfavorable neurological prognosis (p<0.05). Twenty-tree (43%) infants had clubfoot. Eighteen (78.3%) of these had abnormal leg movements. No infant in breech presentation (n=10) showed normal motor function. The presence of uterine contractions and the premature membrane rupture, observed in 13 fetuses (87%), were also linked to the alteration of neonatal muscular strength (p<0.05). CONCLUSION: clubfoot and breech presentation are ultrasonographic findings useful in predicting neurological neonatal outcome. Uterine contractions and premature membrane rupture are associated with poor motor neonatal outcome.
Summary
Revista Brasileira de Ginecologia e Obstetrícia. 2003;25(6):425-430
DOI 10.1590/S0100-72032003000600007
PURPOSE: to determine whether prenatal sonographic findings and uterine contractions can predict neonatal motor outcome in fetuses with open spina bifida. METHODS: we evaluated retrospectively 53 fetuses with open spina bifida from 1993 to 2001. These fetuses were born and followed-up at the fetal medicine units of the Hospital São Paulo ("Universidade Federal de São Paulo") and the "Hospital Santa Joana". The influence of the alterations observed through ultrasound scan on neonatal muscular strength (macrocrania, microcrania, level of the spinal column opening, clubfoot and type of fetus position) was evaluated. The influence of uterine contractions on neonatal motor outcome was also evaluated. All deliveries were made through cesarian section. c² and Fisher tests were used for categorical comparisons. A p<0.05 was considered significant. RESULTS: Fifty-three cases of isolated open spina bifida were studied. Alterations of the cranial circumference size and the level of the lesion did not interfere in the neonatal motor perfomance. However, clubfoot and breech position showed to be predictors of an unfavorable neurological prognosis (p<0.05). Twenty-tree (43%) infants had clubfoot. Eighteen (78.3%) of these had abnormal leg movements. No infant in breech presentation (n=10) showed normal motor function. The presence of uterine contractions and the premature membrane rupture, observed in 13 fetuses (87%), were also linked to the alteration of neonatal muscular strength (p<0.05). CONCLUSION: clubfoot and breech presentation are ultrasonographic findings useful in predicting neurological neonatal outcome. Uterine contractions and premature membrane rupture are associated with poor motor neonatal outcome.