Analysis of Term Infants With Significant Respiratory Complications

A group of 33 term infants with significant respiratory complications were compared with 3,194 term infants delivered during the same time period and without respiratory morbidity. Compared with controls, the study group had a higher incidence of antepartum risk factors such as intrautirne growth retardation(12.1% versus 0.41%), postdatism(18.2% versus 2.79%) and intrapartum risk factors such as abnormal FHR(42.$$% verse 3.2%), meconium-stained amniotic fluid(72.7% versus 6.9%). The odds ratio of intrauterine growth retardation for significant respiratory complications is 33.75 and that of postdatism is 7.753. The odds ratio of abnormal FHR for significant respiratory complications is 22.12 and ,that of meconium-stained amniotic fluid is 36.23. Even in the presence of normal intrapartum FHR and 5-minute Apgar scores, infants with meconium-staines amniotic fluid had an indicidence of respiratory complications 7∼8 times higher than those with clear amniotic fluid. Anterpartum risk factors, meconium-stained amniotic fluid, and abnormal FHR identified the fetus at high risk for significant respiratory complications

Effects of peroxides and preeclamptic sera on prostaglandin release by perfused human umbilical cord vein

Objective This study was performed to evaluate the prostaglandin secretion rates in human umbilical vein with preeclamptic sera and peroxide perfusion. Study design Isolated human umbilical cords(n=10) were perfused for 30-minute intervals with cord buffer, 15% normal pregnant sera and preeclamptic patient sera, 100 mol/L t-butyl hydroperoxide alone, and after perfusion with low-dose aspirin(5×10( )mol/L). Cord buffer gassed with 95% oxygen and 5% carbon dioxide and warmed to 37℃ was used for the perfusion buffer. Effluent flow rates were measured during each experimental treatment. Effluent samples were measured for 6-keto prostaglandin Flα and thromboxane B( ) by enzyme immunoassays. Results The concentrations of 6-keto prostaglandin F( )α in preeclamptic sera were significantly higher than those in normal pregnant sera.(989.3849 ± 1602.927 vs. 1.3116 ± 1.22085 ng/ml, mean ± SD, p<0.01). However, the concentrations of thromboxane B( ) were not different between normal pregnant sera and preeclamptic sera. The secretion rate of 6-keto-prostaglandin F( )α in human umbilical endothelial cells was not significantly different(p=0.77) between two groups. Comparing to normal pregnant sera, the secretion rate of thromboxane B( ) was significantly increased(p<0.01) after preeclamptic sera perfusion. The secretion rate of 6-keto-prostaglandin F( ) was significantly increased(p<0.01) following peroxide perfusion and that was significantly decreased by aspirin. The secretion rate of thromboxane B( ) was not significantly different between preeclamptic sera and peroxide alone or subsequent perfusion with aspirin. Conclusions (1) Preeclamptic sera stimulate thromboxane production rather than prostacyclin production by endothelial cells of human umbilical vein in vitro. (2) Peroxide stimulates the secretion of both prostacyclin and thromboxane, and low dose aspirin mitigates hydroperoxide-induced prostacyclin secretion. We confirmed that thromboxane secretion is stimulated by preeclamptic sera and the role of peroxide in prostaglandin secretion. We established the perfusion system using human umbilical vein through this study. This perfusion system may be useful to understand the pathophysiology of preeclampsia.Objective This study was performed to evaluate the prostaglandin secretion rates in human umbilical vein with preeclamptic sera and peroxide perfusion. Study design Isolated human umbilical cords(n=10) were perfused for 30-minute intervals with cord buffer, 15% normal pregnant sera and preeclamptic patient sera, 100 mol/L t-butyl hydroperoxide alone, and after perfusion with low-dose aspirin(5×10( )mol/L). Cord buffer gassed with 95% oxygen and 5% carbon dioxide and warmed to 37℃ was used for the perfusion buffer. Effluent flow rates were measured during each experimental treatment. Effluent samples were measured for 6-keto prostaglandin Flα and thromboxane B( ) by enzyme immunoassays. Results The concentrations of 6-keto prostaglandin F( )α in preeclamptic sera were significantly higher than those in normal pregnant sera.(989.3849 ± 1602.927 vs. 1.3116 ± 1.22085 ng/ml, mean ± SD, p<0.01). However, the concentrations of thromboxane B( ) were not different between normal pregnant sera and preeclamptic sera. The secretion rate of 6-keto-prostaglandin F( )α in human umbilical endothelial cells was not significantly different(p=0.77) between two groups. Comparing to normal pregnant sera, the secretion rate of thromboxane B( ) was significantly increased(p<0.01) after preeclamptic sera perfusion. The secretion rate of 6-keto-prostaglandin F( ) was significantly increased(p<0.01) following peroxide perfusion and that was significantly decreased by aspirin. The secretion rate of thromboxane B( ) was not significantly different between preeclamptic sera and peroxide alone or subsequent perfusion with aspirin. Conclusions (1) Preeclamptic sera stimulate thromboxane production rather than prostacyclin production by endothelial cells of human umbilical vein in vitro. (2) Peroxide stimulates the secretion of both prostacyclin and thromboxane, and low dose aspirin mitigates hydroperoxide-induced prostacyclin secretion. We confirmed that thromboxane secretion is stimulated by preeclamptic sera and the role of peroxide in prostaglandin secretion. We established the perfusion system using human umbilical vein through this study. This perfusion system may be useful to understand the pathophysiology of preeclampsia

The Comparison of Platelet Indices between Normal Pregnancy and Severe Preeclampsia

The purpose of this retrospective study was to define platelet indices in severe preeclampsia(N=98) and to compare them to normal nonpregnant values(N=93) during the years 1990-1993 in the Department of Obstetrics and Gynecology, College of medicine, University of Ulsan, Asan Medical Center. Indices evaluated included platelet count, mean platelet volume, and platelet distribution width. Means platelet volume was statistically different between two groups, however mean platelet count was significantly decreased(p=0.029) and platelet distribution width was significantly increased(p=0.0001) and platelet distribution width was significantly increased(p=0.0001) in severe preeclampria. Mean platelet volume versus platelet count in normal pregnancy showed a significant inverse nonlinear relationship(r=-0.39, 9<0.001) and that in preeclampsia was congruent with notmal nonpregnant valus. With same mean platelet volume, platelet distribution width showed tendency to shift to right in severe preeclampsia. These findings support the concept of severe preeclampsia as a compensated state of increased platelet comsumption comparing with normal pregnancy. We concluded from above results that quantification of platelet indices may have some value in screening for and following severe preeclampsia.The purpose of this retrospective study was to define platelet indices in severe preeclampsia(N=98) and to compare them to normal nonpregnant values(N=93) during the years 1990-1993 in the Department of Obstetrics and Gynecology, College of medicine, University of Ulsan, Asan Medical Center. Indices evaluated included platelet count, mean platelet volume, and platelet distribution width. Means platelet volume was statistically different between two groups, however mean platelet count was significantly decreased(p=0.029) and platelet distribution width was significantly increased(p=0.0001) and platelet distribution width was significantly increased(p=0.0001) in severe preeclampria. Mean platelet volume versus platelet count in normal pregnancy showed a significant inverse nonlinear relationship(r=-0.39, 9<0.001) and that in preeclampsia was congruent with notmal nonpregnant valus. With same mean platelet volume, platelet distribution width showed tendency to shift to right in severe preeclampsia. These findings support the concept of severe preeclampsia as a compensated state of increased platelet comsumption comparing with normal pregnancy. We concluded from above results that quantification of platelet indices may have some value in screening for and following severe preeclampsia