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Adamović T, Sovilj M, Ribarić-Jankes K, Ljubić A, Antonović O. 18. Neurophysiologic response in newborn as a predictive factor of hearing impairment. Clin Neurophysiol 2011. [DOI: 10.1016/j.clinph.2010.12.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Maksimović M, Maksimović M, Gojnić M, Maksimović Z, Petković S, Ljubić A, Stefanović A, Jeremić K. Surgical treatment of ovarian cancer and early detection of venous thromboembolism. EUR J GYNAECOL ONCOL 2011; 32:415-418. [PMID: 21941965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Deep vein thrombosis (DVT) is present in 10.6% patients after operative treatment for ovarian malignancy. We undertook the present study to find the risk factors for venous thromboembolism (VTE) after surgical treatment for ovarian cancer and to clarify the prognostic value of D-dimer and a positive PTP test (Wells score) in these patients. MATERIAL AND METHODS A total of 31 consecutive patients with histologically confirmed ovarian cancer after surgery, clinically suspicious for DVT were followed from January 2006 to December 2008. All patients were operatively treated at the Clinical Center of Serbia. Study variables included age, cardiovascular disease, FIGO stage, histology, BMI, presence of massive ascites and tumor size, D-dimer level and Wells score. All patients were postoperatively administered anticoagulant therapy. RESULTS DVT was found in nine of 31 patients (29.0%). High BMI and presence of massive ascites were significantly associated with DVT. D-dimer (DD) levels were high in 27 of out 31 patients (87.1%). Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were 100, 18.2, 33.3 and 100%. Results of the PTP test (according to Wells score) was positive in 20 out of 31 patients (64.5%). PTP score was not significantly different in patients with or without VTE (p = 0.606). Sensitivity, specificity, PPV and NPV were 66.7, 36.4, 30.0 and 72.7%, respectively. CONCLUSION Incidence of VTE after gynecological operations for ovarian cancer in our study was similar to other investigators. Obesity and the massive ascites are statistically significant risk factors. Measurement of DD level and ultrasonography could become the standard in predicting VTE in ovarian cancer surgery. The use of Wells score is not satisfying in these patients. Prediction of VTE after gynecological surgery needs further confirmation in randomized controlled trials.
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Affiliation(s)
- Milica Maksimović
- Clinic for Gynaecology and Obstetrics, Clinical Center of Serbia, Belgrade
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Adamović T, Ribarić-Jankes K, Sovilj M, Ljubić A, Antonović O. 40. The vestibular function in newborn. Clin Neurophysiol 2010. [DOI: 10.1016/j.clinph.2009.11.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Babović I, Plesinac S, Opalić J, Pilić I, Radojicić Z, Pervulov M, Radunović N, Ljubić A. Intramuscular fetal corticosteroid therapy short-term effect on maternal-fetal Doppler velocimetry. CLIN EXP OBSTET GYN 2009; 36:248-250. [PMID: 20101859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
AIM The aim of the study was to assess the short-term effects of intramuscular (IM) corticosteroid therapy (CST) on fetoplacental and fetal circulation in high-risk pregnancies of preterm labor. METHOD We evaluated the effect of IM fetal single-dose dexamethasone (4 mg/kg) on fetoplacental and fetal circulation two hours before and 0-4 hours after CST in 38 fetuses after the 32nd week of gestation. RESULT Changes in the umbilical artery (UA) resistance index (RI) after fetal CST (AU RI1) were significantly correlated with gestational age after the 32nd week at recording r = 0.354; p < 0.05. There was a statistically significant difference of RI in the descending aorta (DAo) before and after therapy; p < 0.001 (-0.04-0.01), 95% confidence interval (CI) for differences. CONCLUSION Short-time effects after fetal IM CST include an increased index resistance in DAO as well as decreased RI in UA after the 32nd week.
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Affiliation(s)
- I Babović
- Institute for Gynecology and Obstetrics, Clinical Center of Serbia, Belgrade, Serbia.
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Bozanović T, Ljubić A, Momcilov P, Mostić T, Vojvodić L, Vidaković S. Synchronous primary tumors: appendiceal and ovarian cancer--case report. EUR J GYNAECOL ONCOL 2009; 30:237-238. [PMID: 19480268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A 64-year-old women was operated on for acute abdomen and both appendiceal and ovarian tumors were found. Histology revealed synchronous adenocarcinoma of the appendix and serous pappillary carcinoma of the right ovary. The patient was given adjuvant chemotherapy and received six cycles of cisplatinum. Regular follow-up showed no recurrence of the two synchronous primary tumors. A rare case of synchronous primary tumors of appendiceal and ovarian origin is reported. The tumors proved to be difficult to treat requiring several combined medical therapies, including surgery, chemo- and radiotherapy.
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Affiliation(s)
- T Bozanović
- Institute for Gynecology and Obstetrics, Clinical Centre of Serbia, Belgrade, Serbia.
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Ljubić A, Sulović V, Svetković M, Novakov A, Bujko M, Kokai D, Vukolić D. [Antenatal homeostasis of insulin and glucose in the fetus with cytomegalovirus infection]. Glas Srp Akad Nauka Med 2002:77-82. [PMID: 16078442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Factors of effect on the fetal glucose level can be of maternal, placental or fetal origin. The level of fetal insulin during gestation is regulated by the potentials of the endogenous fetal production on one hand and on the other by the factors (primarily glucaemia) that stimulate or inhibit its production. The aim of this paper was to analyze in which way and to what extent the congenital infection with the Cytomegalovirus disturbs the metabolism of the fetal glucose and insulin. Umbilical venous cord blood was obtained by cordocentesis at 22 to 29 weeks gestation from 52 women referred to our clinic for fetal karyotyping and scatological analysis of fetal CMV infection. To determine the effect of Cytomegalovirus (CMV) infection on insulin and glucose fetal homeostatis, we performed cordocentesis in 18 patients (group A) with proved congenital CMV fetal infection. Control group (B) consisted of 34 patients in whom blood samples were taken for fetal karyotyping. Maternal and fetal glucose levels were 3.95 mmol/l and 3.15 mmol/l in group A and 4.00 and 3.62 mmol/l in group B, respectively. Maternal average insulin level in group A was 14.45 mU/ml and in fetuses 10.64 mU/ml, while in group B maternal and fetal insulin levels were 12.85 mU/ml and 15.35 mU/ml, respectively. Maternal/fetal (M/F) insulin ratio was in group A 1.35, and in group B 0.84. Statistical analysis showed significantly lower glucose and insulin levels and also higher maternal/fetal insulin ratio in fetuses affected by CMV infection (t = 1.4, p < 0.001). Consequences of congenital CMV infection were fetal hypoglucaemia and hypoinsulinemia.
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Ljubić A, Sulović V, Svetković M, Novakov A, Bujko M, Kokai D, Vukolić D. [Metabolism of amino acids in fetuses with cytomegalovirus infection and growth retardation]. Glas Srp Akad Nauka Med 2002:83-8. [PMID: 16078443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Aim of the study was to evaluate correlation between valine and glycine, representatives of essential and nonessential amino acids, in fetuses appropriate and small for gestational age with congenital cytomegalovirus infection. Umbilical venous cord blood was obtained by cordocentesis at 22 to 29 weeks' gestation from 18 women (11 in appropriate for gestational age--A, and seven in small for gestational age--B) fetuses with CMV infection. Plasma amino acids were measured with an Beckman M 121 amino acid analyzer. Maternal valine level was 136.0 mmol/l; fetal valine in AGA and SGA fetuses: 219 and 189 mmol/l respectively. Fetomaternal valine ratio was significantly lower in SGA group (1.39 mmol/l-SGA, 1.61 mmol/l AGA, t = -6.9, p < 0.001). Glycine level in maternal blood was 139.0 mmol/l; fetal in SGA and AGA fetuses 137 mmol/l and 176 mmol/l, respectively. Fetomaternal glycine ratio was also significantly lower in SGA group than in AGA, 1.01 and 1.27 respectively (t = -2.96, p < 0.001). Valine/Glycine maternal and fetal ratio did not show any difference between groups. In congenitally CMV infected fetuses with intrauterine growth retardation there is a decreased valine and glycine level, compared to the congenitally CMV infected fetuses with normal intrauterine growth. There is a lower fetal concentration of these amino acids compared to the maternal level in SGA fetuses. A decreased glycine level compared to the valine level has also been found in congenitally CMV infected fetuses with intrauterine growth retardation.
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Mihailović M, Cvetković M, Ljubić A, Kosanović M, Nedeljković S, Jovanović I, Pesut O. Selenium and malondialdehyde content and glutathione peroxidase activity in maternal and umbilical cord blood and amniotic fluid. Biol Trace Elem Res 2000; 73:47-54. [PMID: 10949968 DOI: 10.1385/bter:73:1:47] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Placenta tissue may be a major source of lipid peroxidation products in pregnancy. It was proven that placental peroxidation activity increases with gestation. Selenium (Se), as an essential constituent of glutathione peroxidase (GSH-Px), takes part in the reduction of hydrogen peroxides and lipid peroxides. Malondialdehyde (MDA) is a major breakdown product split off from lipid peroxides. In this study, Se and MDA content and GSH-Px activity were measured in blood and plasma taken from 20 apparently healthy nonpregnant women between 19 and 38 yr of age and from 115 unselected pregnant women between 17 and 45 yr of age (35 in the first trimester, 22 in the second trimester, 38 in the third trimester, and 20 within 2 d of delivery). Samples of umbilical cord blood and amniotic fluid were taken from women in the second and third trimesters and at delivery. The Se content was measured by atomic absorption spectrometry (AAS), plasma MDA concentration by thiobarbituric acid reaction, and Se-dependent GSH-Px spectrometrically. Blood and plasma Se contents of nonpregnant women were below those considered adequate, indicating low selenium intake. In comparison to nonpregnant women, pregnant women had significantly decreased whole-blood and plasma Se levels in the second and third trimesters and at delivery. The significant drop of whole-blood SeGSH-Px activity was observed in the first trimester of pregnancy and its lower activity was maintained until delivery. A significant drop in plasma SeGSH-Px activity occurred in the second trimester and attained the minimal level at delivery. The Se level and SeGSH-Px activity in maternal and umbilical cord blood were at similar levels. Amniotic-fluid SeGSH-Px activity was nondetectable or exceptionally low and its Se content remained unchanged during pregnancy. Plasma levels of MDA were significantly decreased in the second and third trimesters and at delivery. The fetal blood plasma at birth had a lower MDA level compared to the levels of MDA of their mothers at delivery. A low, but significant inverse correlation existed between blood SeGSH-Px activity and plasma MDA content and between plasma Se and plasma MDA contents during pregnancy. A significant decrease of Se and SeGSH-Px activities (antioxidant enzyme) in both blood and plasma suggests a possible drop in total antioxidant status during pregnancy. Elevated MDA plasma levels might be the result of increased lipid peroxidation in placental tissue during pregnancy. Index Entries: Selenium; glutathione peroxidase; malondialdehyde; pregnancy; umbilical cord blood; amniotic fluid.
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Affiliation(s)
- M Mihailović
- Department of Physiology and Morphology, Faculty of Veterinary Medicine, Bulevar JNA 18, Belgrade, Yugoslavia
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Ljubić A, Cvetković M, Sulović V, Radunović N, Antonović O, Vukolić D, Popović B, Petković S. New technique for artificial lung maturation. Direct intramuscular fetal corticosteroid therapy. CLIN EXP OBSTET GYN 1999; 26:16-9. [PMID: 10412616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
The aim of this study was to present a new technique of administration of antenatal corticosteroid therapy in order to cause fetal lung maturation. A single dexamethasone dose of 4 mg was applied directly to the fetal gluteal musculature by ultrasound-guided intramuscular injection 48 h before delivery. This technique of fetal corticosteroid therapy was applied in six cases. Our patients had high risk pregnancies (preeclampsia diabetes mellitus, intracranial hemorrhage, epilepsy, hyperthyreosis). The pregnancies were terminated in the mother's vital interest. The lecithin/sphyngomyelin (US) ratio was < 1.5:1. There were no procedure-related complications. The fetuses were delivered by cesarean, 48 hours later except for the vaginal delivery in the patient in which fetal death occurred in utero. In five cases an uneventful outcome of fetuses indicated that direct fetal corticosteroid treatment improved postnatal lung function in preterm fetuses. A new technique of corticosteroid application successfully prevents respiratory distress in preterm infants decreasing the risk of maternal complications. To our knowledge, this is the first report of fetal intramuscular corticosteroid therapy in the human population.
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Affiliation(s)
- A Ljubić
- Institute of Obstetrics and Gynecology, Clinical Center of Serbia, Belgrade, Yugoslavia
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Ljubić A, Cvetković M, Sulović V, Bujko M, Jovanović T, Novakov A. How congenital cytomegalovirus infection changes insulin and glucose homeostasis in affected fetuses. CLIN EXP OBSTET GYN 1998; 24:149-51. [PMID: 9478302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Factors affecting the fetal glucose level can be of maternal, placental or fetal origin. The level of fetal insulin during gestation is regulated by the potential of the endogenous fetal production on one hand, and on the other, by the factors (primarily glycaemia) that stimulate or inhibit its production. The aim of this paper was to analyze in which way and to what extent congenital infection with the cytomegalovirus disturbs the metabolism of fetal glucose and insulin. Umbilical venous cord blood was obtained by cordocentesis at 22 to 29 weeks gestation from 52 women referred to our clinic for fetal karyotyping and scatological analysis of fetal CMV infection. To determine the effect of cytomegalovirus (CMV) infection on insulin and glucose fetal homeostasis, cordocentesis was performed in 18 patients (group A) with proven congenital CMV fetal infection. The control group (B) consisted of 34 patients in whom blood samples were taken for fetal karyotyping. Maternal and fetal glucose levels were 3.95 mmol/l and 3.15 mmol/l in group A and 4.00 and 3.62 mmol/l in group B, respectively. Maternal average insulin level in group A was 14.45 mU/ml and in fetuses 10.64 mU/ml, while group B maternal and fetal insulin levels were 12.38 mU/ml and 15.35 mU/ml, respectively. Maternal/fetal (M/F) insulin ratio was 1.35 in group A and in group B, 0.84. Statistical analysis showed significantly lower glucose and insulin levels and also a higher maternal/fetal insulin ratio in fetuses affected by CMV infection (t = 1.4 p < 0.001). Consequences of congenital CMV infection were fetal hypoglycaemia and hypoinsulinemia.
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Affiliation(s)
- A Ljubić
- University of Belgrade School of Medicine, Clinic for Obstetrics and Gynecology, Yugoslavia
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Ljubić A, Cvetković M, Sulović V, Novakov A, Kokai D, Bujko M, Jovanović T, Vukolić D. Essential and nonessential amino acids in appropriate and small for gestational age fetuses with congenital cytomegalovirus infection. CLIN EXP OBSTET GYN 1998; 24:206-8. [PMID: 9478320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The aim of the study was to evaluate the correlation between valine and glycine, representatives of essential and nonessential amino acids, in appropriate and small fetuses for gestational age with congenital cytomegalovirus (CMV) infection. Umbilical venous cord blood was obtained by cordocentesis at 22 to 29 weeks' gestation from 18 women (11 in appropriate for gestational age (AGA) -A, and 7 in small for gestational age (SGA) -B) fetuses with CMV infection. Plasma amino acids were measured with a Beckman M 121 amino acid analyzer. Maternal valine level was 136.0 mmol/l; fetal valine in AGA and SGA fetuses: 219 and 189 mmol/l, respectively. Fetomaternal valine ratio was significantly lower in the SGA group (1.39 mmol/l-SGA, 1.61 mmol/l AGA, t = 6.9 p < 0.001). The glycine level in maternal blood was 139.0 mmol/l; fetal in SGA and AGA fetuses 137 mmol/l, and 176 mmol/l, respectively. The fetomaternal glycine ratio was also significantly lower in the SGA group than in AGA. 1.01 and 1.27, respectively (t = -2.96, p < 0.001). Valine/glycine maternal and fetal ratio did not show any difference between groups. In the congenital CMV infected fetuses with intrauterine growth retardation there were decreased valine and glycine levels compared to the congenitally CMV infected fetuses with normal intrauterine growth. There was a lower fetal concentration of these amino acids compared to the maternal level in SGA fetuses. A decreased glycine level compared to the valine level has also been found in congenitally CMV infected fetuses with intrauterine growth retardation.
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Affiliation(s)
- A Ljubić
- University of Belgrade School of Medicine, Clinic for Obstetrics and Gynecology, Yugoslavia
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Abstract
Chlamydia trachomatis is one of the most prevalent genital pathogens in pregnant women. Ascending, transcervical infection may reach fetal membranes creating chorioamnionitis or amniotic fluid infection. The aim of this study was to examine amniotic fluids obtained during cesarean section for the presence of chlamydial IgM- and IgG-specific antibodies, and for the presence of C. trachomatis antigen. Five of 52 (9.6%) amniotic fluid samples were seropositive. Two of 52 (3.8%) amniotic fluid samples had C. trachomatis antigen in the epithelial cells of the amnion. In conclusion, our data indicate that there is a high rate of transmission of C. trachomatis from mother to infant and that the pathogen can be identified in the amniotic fluid.
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Affiliation(s)
- S Djukić
- Institute of Microbiology and Immunology, School of Medicine, University of Belgrade, Yugoslavia
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Djukić S, Nedeljković M, Pervulov M, Bojić V, Ljubić A, Radunović N, Lazarević B. [Chlamydia trachomatis infection in newborn infants]. SRP ARK CELOK LEK 1995; 123:244-246. [PMID: 17974440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
Abstract
The aim of our study was to examine the frequency of Chlamydia trachomatis infection in newborns by detecting specific antibodies, and to examine the Apgar score and the birth weight of Chlamydia trachomatis-antibody positive children. Fifty-two newborn infants were tested. High serum IgG chlamydial specific antibody titers had 11 (21%) newborns, while high serum IgM titers had 9 (17%) newborns. Our results showed that serum Chlamydia trachomatis-specific IgM antibodies were detected statistically more often in low birth weight newborns (<2500 g) (p < 0.05).
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Rosić B, Jevremović M, Milacić D, Gligorović S, Stojanov M, Ljubić A, Terzić M. [Correlation of glycosylated hemoglobin and fructosamine in pregnant women with diabetes mellitus]. SRP ARK CELOK LEK 1993; 121:17-9. [PMID: 8202815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Glycolisated hemoglobin (HBA1c), fructosamine, glucose, albumin and total proteins were estimated 40 healthy pregnant women and 90 pregnant women with diabetes mellitus. Fructosamine was estimated by NBT method with "Fructosamine test" commercially available kit on Technicom automatic analyser RA-1000. Glucose was determined on Beckmman glucose analyser. HBA1c was assayed by Bio-Rad test, while albumin and total proteins by Beckmman tests. We found best correlation between fructosamine and HBA1c at pregnant women who were on dietary therapy worst at pregnancy women on insulin therapy.
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Affiliation(s)
- B Rosić
- Ginekolosko-akuserska klinika, Klinickog centra Medicinskog fakulteta, Beograd
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Rosić D, Lazarević B, Radunović N, Ljubić A, Ilić S. [Etiologic factors in fetal intrauterine growth retardation]. SRP ARK CELOK LEK 1992; 120:329-31. [PMID: 1340643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The authors studied the incidence of individual aetiological factors which may cause intrauterine interruption of foetal development. The research concerned 26 pregnant women hospitalized in the Ward for Pregnancy Pathology of the Department of Gynaecology and Obstetrics over the period from 1986-1989. The majority of women with this manifested EPH gestosis: essential hypertension was observed in 3 patients (12%). Particular attention was paid to the final stage of delivery and to the Apgar Score. Discussion includes the results of other authors. In the conclusion the importance and significance of this problem are stressed--within the scope of perinatal medicine--in view of the high morbidity and mortality rates among infants.
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Affiliation(s)
- Dj Rosić
- Department of Gynaecology and Obstetrics, University Clinical Centre, Belgrade
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Lazarević B, Poljaković L, Ljubić A, Radunović N. [Lecithin in the amniotic fluid in the determination of fetal lung maturity]. Jugosl Ginekol Perinatol 1989; 29:165-7. [PMID: 2640262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A prospective study involved 90 patients divided into groups of high risk and risk pregnancies, which matched in age, parity and gestational age. Two methods for the amniotic fluid phospholipid analysis were compared. The value of lecithin was measured by the two phase UV enzyme method and the lecithin/sphingomyelin (L/S) ratio was determined by Gluck's method. The correlation of lecithin and the L/S ratio with gestational age did not prove statistically significant. No correlation was found between the lecithin concentration and L/S ratio on the one hand and the occurrence of the respiratory distress syndrome on the other. The increase of RDS in high risk pregnancies was not statistically significant. The lecithin concentration determination appeared to be a more specific method (37%) than the L/S ratio (19%), and the predictive value of the negative test also proved to be higher (94%) in relation to the L/S ratio (89%).
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