Yildiz Atalay

Gazi University, Engüri, Ankara, Turkey

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Publications (69)112.67 Total impact

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    ABSTRACT: Intravenous Immunoglobulin G (IVIG) therapy has been used as a component of the treatment of hemolytic disease of the newborn. There is still no consensus on its use in ABO hemolytic disease of the newborn routinely. The aim of this study is to determine whether administration of IVIG to newborns with ABO incompatibility is necessary. One hundred and seventeen patients with ABO hemolytic disease and positive Coombs test were enrolled into the study. The subjects were healthy except jaundice. Infants were divided into two groups: Group I (n = 71) received one dose of IVIG (1 g/kg) and LED phototherapy whereas Group II (n = 46) received only LED phototherapy. One patient received erythrocyte transfusion in Group I, no exchange transfusion was performed in both groups. Mean duration of phototherapy was 3.1 ± 1.3 days in Group I and 2.27 ± 0.7 days in Group II (p < 0.05). Mean duration of hospital stay was 5.34 ± 2.2 days in Group I and 3.53 ± 1.3 days in Group II (p < 0.05). Mean duration of phototherapy was 4.0 ± 1.5 days and 2.73 ± 1.1 days in double and single doses of IVIG respectively, and this was statistically significant (p < 0.05). IVIG therapy didn’t decrease neither phototherapy nor hospitalization duration in infants with ABO hemolytic disease. Meticulus follow-up of infants with ABO hemolytic disease and LED phototherapy decreases morbidity. IVIG failed to show preventing hemolysis in ABO hemolytic disease.
    Indian Journal of Hematology and Blood Transfusion 03/2014; · 0.25 Impact Factor
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    ABSTRACT: Newborns are exposed to a considerable number of painful stimuli. This study is aimed to investigate the effects of 30% glucose solution and nonnutritive sucking on pain perception during venipuncture. Twenty-five term infants were randomized as receiving 30% dextrose (group 1) or sterile water (group 2). Neonatal Infant Pain Scale scores, skin conductance algesimeter recordings, and near-infrared spectroscopy measurements were recorded during the procedure. Neonatal Infant Pain Scale and skin conductance algesimeter results were decreased in both groups from that during venipuncture to after the procedure. Group 1 had lower Neonatal Infant Pain Scale scores compared with group 2 after venipuncture, different from the skin conductance algesimeter, where no difference was observed between groups. In group 1, cerebral blood volume increased after venipuncture. Glucose does not attenuate the Neonatal Infant Pain Scale score and skin conductance algesimeter index during venipuncture, but it leads to a lower Neonatal Infant Pain Scale score after venipuncture unlike the skin conductance algesimeter index, which was not lowered.
    Journal of child neurology 12/2013; · 1.59 Impact Factor
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    ABSTRACT: Gamma-glutamyltransferase (GGT) is commonly measured in newborn infants as a sensitive liver function test, however reference ranges mostly based on early studies including relatively small number of patients. The aim of this study was to emphasise recently changed GGT values due to changed newborns profile admitted to neonatal intensive care units (NICU) and establish new cross-sectional reference ranges for the serum GGT levels in a cohort of neonates between 26 and 42 weeks gestational age in one center. From January 1, 2010 to December 31, 2012 liver function tests including serum GGT measurement were performed in 705 newborns who were admitted to NICU due to different etiologies at Gazi University School of Medicine Hospital, Ankara, Turkey. Infants with Apgar score <8 on 5th minutes, any metabolic or liver disease, cholestasis, congenital infection, culture proven sepsis, elevated serum aminotransferases, who treated with phenobarbital were excluded. Clinical and laboratory data of 583 neonates was analysed retrospectively. GGT was measured by enzymatic method by Abbott Architect C16000 autoanalyser. Mean, 2.5th and 97.5th percentiles were used to express the reference range data. Four hundred sixty one GGT values of 200 preterm infants and 501 GGT values of 383 term infants during the first 28 days after birth were analysed. Serum GGT levels of preterm infants in the first 7 days and between 8-28 days after delivery were (mean ± SD; 141.81 ± 88.56 U/L and 131.17 ± 85.53 U/L) similar with term infants (139.90 ± 86.46 U/L and 144.56 ± 86.51 U/L) respectively (p = 0.649 and p = 0.087). Serum GGT levels were found to be significantly higher in male infants (145.98 ± 93.68 U/L) than females (132.18 ± 78.97 U/L) (p = 0.035) and infants born vaginally (152.24 ± 90.71 U/L) had also higher serum GGT activity than those born by cesarean section (135.38 ± 85.37 U/L) (p = 0.005). A new reference range for serum GGT levels which higher than previous reference values can identify neonates with actually abnormal results and prevent unnecessary interventions.
    Journal of pediatric gastroenterology and nutrition 08/2013; · 2.18 Impact Factor
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    ABSTRACT: We report a case of a newborn with severe respiratory distress since birth with two giant intrathoracic and separate eneteric duplication cysts in right hemithorax. On day 19, the intrathoracic cysts were removed, and the baby was discharged on his 22nd day of life. Histologic findings confirmed the diagnosis of a gastric duplication cyst. This report is the first case of two isolated, separated and giant right intrathoracic gastric duplication cysts in literature. The diagnostic values of radiological evaluation and surgical and pathological management for precise diagnosis are discussed.
    Scottish medical journal 08/2013; 58(3):e28-30. · 0.29 Impact Factor
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    ABSTRACT: Perinatal asphyxia is an important cause of neonatal morbidity and mortality. Hypothermia is an effective treatment of neonatal hypoxic-ischemic encephalopathy in infants. Cold agglutination is a primary or acquired autoimmune disease that involves autoantibodies that lead to hemagglutination at low temperatures lower than that of the body. In this case the importance of cold agglutinins during therapeutic hypothermia is presented.
    The Indian Journal of Pediatrics 12/2012; · 0.72 Impact Factor
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    ABSTRACT: Iron deficiency (ID) is a global health problem. We aimed to determine the prevalence of ID at the first year of life in infants who were hospitalized in our neonatal intensive care unit (NICU) and investigate the effects of various factors on iron status. One year follow-up data of 219 infants who were discharged from NICU was retrospectively evaluated. ID anemia and ID without anemia were detected in fifteen infants (6.8%) and five (2.3%) infants, respectively. We concluded that, due to prophylactic iron treatment and close follow-up, hospitalization in neonatal period did not have any adverse effect on iron status at first year of life.
    Transfusion and Apheresis Science 05/2012; 47(1):85-9. · 1.23 Impact Factor
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    ABSTRACT: The aim of the present study was to determine language levels in twins and singletons born after at least 34 weeks gestation and without identifiable neurological abnormality and to evaluate whether in vitro fertilization (IVF) affects language development in twin pregnancies. A prospective study of a large cohort of all children born between 1 January 2001 and 31 December 2003 was carried out at Gazi University Hospital. All live-born twin pairs in which both twins survived were identified, and a comparable sample of families with pairs of singletons were chosen. The Stanford-Binet Intelligence Scale Form and the translated Turkish form of the Peabody Picture Vocabulary Test were completed at 60 months. Even after excluding the most premature twins and those with diagnosable neurological damage, twins performed worse than singletons on language development tests. Twin girls had better scores than twin boys. A statistically significant difference was found between the scores of term and preterm twins. No significant difference was noted when compared according to birth order. Appropriate for gestational age (AGA) twins did better than small for gestational age (SGA) twins in the test scores. All twin girls did not differ from singleton girls, but all twin boys performed worse than singleton boys. Term twins had similar results with term singletons, but preterm twins had lower scores than preterm singletons. SGA singletons had better scores than SGA twins, while AGA twins and singletons did not differ. When the children were compared with regard to method of conception, IVF children had significantly lower scores on the tests than those in the spontaneous conception group. It is hoped that the present findings could lead to a more precise assessment of children for speech impairment and, above all, to more efficient preventive intervention. Whatever mechanisms are involved, the present results indicate that twins born as a result of IVF, are at a disadvantage in terms of language development in comparison with spontaneously conceived twins.
    Pediatrics International 07/2011; 53(6):944-9. · 0.88 Impact Factor
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    ABSTRACT: Infants are considered large for gestational age (LGA) if their birth weight is greater than the 90th percentile for gestational age and they have an increased risk for adverse perinatal outcomes. Maternal diabetes is one of the factors affecting birthweight. However there are limited data on the perinatal outcomes of infants of gestational diabetic mothers. The aim of the present study was to compare the neonatal outcomes of LGA infants delivered by women with and without gestational diabetes mellitus. This was a retrospective study of LGA infants of ≥36 weeks of gestation born at the Gazi University Medical School Hospital during the period of 2006-2009. Neonatal outcomes included hypoglycemia and polycythemia in the early neonatal period and hospital admissions. The Chi-square and Student's t test were used for comparing variables. Seven hundred eligible infant-mother pairs were enrolled in the study. Eighty-seven of them (12.4%) were infants of gestational diabetic mothers and 613 (87.6%) were infants of non-diabetic mothers. The incidence of hypoglycemia at the first hour was higher in infants of diabetic mothers (12.8%) than in infants of non-diabetic mothers (5.3%) (P=0.014). Polycythemia was also more frequently observed in infants of the gestational diabetic mothers (9.3%) than in infants of the non-diabetic mothers (3.0%) (P=0.010). Although overall hospital admission rates were not different between the two groups, infants of diabetic mothers were more likely to be admitted because of resistant hypoglycemia (P=0.045). The results of this study suggested that LGA infants of mothers with gestational diabetes mellitus were at a greater risk for hypoglycemia and polycythemia in the early neonatal period than LGA infants of nondiabetic mothers.
    World Journal of Pediatrics 06/2011; 8(2):136-9. · 1.08 Impact Factor
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    ABSTRACT: The aim of this study was to assess cerebral and peripheral oxygenation, by using near infrared spectroscopy (NIRS) and microcirculation by using side stream dark field (SDF) imaging in newborns with polycythemia before and after partial exchange transfusion (PET) therapy to investigate treatment effect on tissue oxygenation and microcirculation. Polycythemic newborns with venous haematocrit (Htc) >70% or ≥65% with symptoms were included. NIRS measurements for cerebral and peripheral oxygenation and SDF recordings for microcirculatory flow assessment were obtained before and after PET. Fractional tissue oxygen extraction (FTOE) was calculated based on tissue oxygenation index and oxygen saturation. Wilcoxon test was used for statistical analysis. Fifteen newborns were included. Cerebral tissue oxygenation index, microvascular flow index and % of vessels with hyperdynamic flow increased after PET; median (range): 61.27 (51.36-61.87) versus 64.54 (54.1-74.38), 2.74 (2.46-3) versus 3.22 (2.64-3.75) and 0 (0-2.8) versus 3 (0-99.3), respectively. Whereas cerebral fractional tissue oxygen extraction (CFTOE), % of vessels with sluggish flow decreased after treatment; 0.36 (0.22-0.44) versus 0.31 (0.17-0.46), 1.4 (0-69) versus 0 (0-0.9), respectively. Peripheral oxygenation was unchanged. Partial exchange transfusion improves microcirculation in polycythemic newborns. Cerebral oxygenation increases and cFTOE decreases suggesting increased blood flow. Microvascular flow increases possibly representing reactive hyperperfusion after hemodilution. Whether these effects are beneficial require further research.
    Acta Paediatrica 05/2011; 100(11):1432-6. · 1.97 Impact Factor
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    ABSTRACT: To investigate the effects of delivery route and maternal anesthesia type and the roles of vasoactive hormones on early postnatal weight loss in term newborns. Ninety-four term infants delivered vaginally (group 1, n=31), cesarean section (C/S) with general anesthesia (GA) (group 2, n=29), and C/S with epidural anesthesia (EA) (group 3, n=34) were included in this study. All infants were weighed at birth and on the second day of life and intravenous (IV) fluid infused to the mothers for the last 6 h prior to delivery was recorded. Serum electrolytes, osmolality, N-terminal proANP (NT-proANP), brain natriuretic peptide (BNP), aldosterone and plasma antidiuretic hormone (ADH) concentrations were measured at cord blood and on the second day of life. Our research showed that postnatal weight loss of infants was higher in C/S than vaginal deliveries (5.7% vs. 1.3%) (p < 0.0001) and in EA group than GA group (6.8% vs. 4.3%) (p < 0.0001). Postnatal weight losses were correlated with IV fluid volume infused to the mothers for the last 6 h prior to delivery (R = 0.814, p = 0.000) and with serum NT-proANP (R = 0.418, p = 0.000), BNP (R = 0.454, p = 0.000), and ADH (R = 0.509, p = 0.000) but not with aldosterone concentrations (p > 0.05). Large amounts of IV fluid given to the mothers who were applied EA prior to the delivery affect their offsprings' postnatal weight loss via certain vasoactive hormones.
    Journal of pediatric endocrinology & metabolism: JPEM 01/2011; 24(1-2):45-50. · 0.75 Impact Factor
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    ABSTRACT: Total parenteral nutrition (TPN) is a revolution in neonatal intensive care unit (NICU) care, but this therapy is not without problems. A 35-week-old, 1300 g female infant was transferred to our NICU because of bilious vomiting and feeding problems. When enteral feeding was started again, a severe condition similar to the previous one developed. On the 24th day, the patient underwent surgery with a diagnosis of Hirschprung's disease. One week before surgery, the parenteral solutions were composed without vitamins because intravenous vitamin supplements suitable for infants were not available. Thereafter, the patient suffered from severe hypoglycaemia, and sepsis started to develop, accompanied by a large anion gap and metabolic acidosis which is severe lactic acidosis refractory to massive doses of bicarbonate. The acidosis improved significantly when the patient was treated with thiamin. Although TPN is life saving in the NICU, meticulous attention must be paid while treating a patient with TPN, and all possible nutrients should be provided. In this report, a case of a preterm newborn requiring a prolonged period of TPN and complicated by serious lactic acidosis is presented and discussed.
    Journal of pediatric endocrinology & metabolism: JPEM 01/2011; 24(9-10):843-5. · 0.75 Impact Factor
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    ABSTRACT: The purpose of this article is to report our experience with intravenous voriconazole therapy in the treatment of persistent Candida septicemia in very low birth weight (VLBW) neonates. Candidiasis was defined if an infant had a positive blood culture. Ten VLBW newborns developed Candida sepsis, and candidemia persisted in 6 of them despite 3 to 21 days of antifungal therapy with amphotericin B, either conventional or liposomal, and fluconazole. After the addition of voriconazole, clearance of Candida was achieved within 3-7 days of treatment. Antifungal therapy combination with liposomal amphotericin B and voriconazole was continued for at least two weeks after two negative cultures 48 hours apart. We conclude that considering the hazardous effects of Candida infections in preterm newborns, voriconazole can be added to the treatment of fungal sepsis in newborns who still have persistent candidemia despite conventional antifungal management. More clinical information is needed before voriconazole can be used as a first-line drug in antifungal therapy in newborns.
    The Turkish journal of pediatrics 01/2011; 53(1):19-26. · 0.56 Impact Factor
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    ABSTRACT: Congenital cystic adenomatoid malformation (CCAM) is a rare bronchopulmonary malformation characterized by loss of the normal pulmonary tissue. CCAM may be frequently associated with cardiac and renal anomalies. Rarely, CCAM may be seen with chromosome abnormalities. This is the first reported neonatal case of prenatally detected CCAM and postnatally diagnosed trisomy 13.
    The Turkish journal of pediatrics 01/2011; 53(3):337-41. · 0.56 Impact Factor
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    ABSTRACT: Nitric oxide (NO) and vascular endothelial growth factor (VEGF) are important mediators for hemodynamics and angiogenesis in the body. NO coming from endothelial cells and red blood cells is particularly effective in hypoxic vasodilation. VEGF has known effects on the induction of NO synthesis and is also known to be affected by blood product transfusions. The objectives of this study were to measure NO and VEGF levels before and after packed red blood cell (PRBC) transfusions. Blood was drawn from preterm newborns before and 30 min after PRBC transfusions and samples were used for NO and VEGF measurements. NO end products nitrite and nitrate were measured by modified Greiss method, VEGF levels measured by double sandwitch ELISA method. Vital signs including heart rate and blood pressure were also recorded. Thirty four newborns were included in the study and overall 54 transfusion episodes were assessed for mediator levels. No difference was observed between the mediator levels before and after PRBC transfusions. Vital signs were also unchanged. As there was no change in NO end product levels with PRBC transfusions, it might suggest that hypoxia was not severe enough to cause nitrite increase; however, other NO sources might still be active. VEGF levels were found to be unchanged and may reflect a delayed effect of transfusion on VEGF induction.
    Hematology (Amsterdam, Netherlands) 06/2010; 15(3):170-3. · 1.33 Impact Factor
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    ABSTRACT: Generalised oedema is a frequent finding during neonatal sepsis, but its aetiology remains uncertain. The objective of this study was to measure functional C1 inhibitor (fC1 inh) levels in newborns with culture-proven sepsis, compare the results with age- and gestational age (GA)-matched controls and correlate the results with the clinical course of the patients during infection, with regard to vascular leak and oedema formation. Newborns with blood culture-proven sepsis were included and samples for C1 inh levels were obtained before the beginning of antibiotic therapy and on the 3rd day of treatment. Body weight, urine output and other treatment modalities including volume boluses were recorded. Oedema formation as a sign of vascular leak was determined by calculating percent weight change over time. Age- and GA-matched newborns without infection were used as controls. No difference was observed between the patient and the control groups concerning fC1 inh levels. Percent weight change in the patient group was not correlated with the C1 inh levels. Despite studies suggesting the role of C1 inhibitor deficiency in vascular leak during sepsis in adults, there is no information in the literature regarding the C1 inh levels of healthy or septic newborns to date. In this study, fC1 inh levels were no different than controls, necessitating the consideration of other factors causing vascular leak and oedema during neonatal sepsis.
    Journal of Paediatrics and Child Health 02/2010; 46(3):121-4. · 1.25 Impact Factor
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    ABSTRACT: The pre and post-treatment effects of L-carnitine on apoptotic cell death due to hypoxia-ischemia in various regions of the brains of seven-day-old rats were investigated. L-carnitine (group 1; n=8) or saline (group 2; n=8) was administered intraperitoneally to seven-day-old rats before hypoxia-ischemia. In addition, 16 seven-day-old rats were given L-carnitine (group 3; n=8) or saline (group 4; n=8) after hypoxic ischemic insult. Apoptotic cell death was investigated by terminal dUDP-biotin nick end-labeling (TUNEL) in all subjects following three days of recovery. In the evaluation of TUNEL-positive cells, firstly the areas (in square millimeters) of the hippocampus, striatum and cortex in the right and left hemispheres were measured by IMAGE analysis. Then the numerical density was calculated as the number of cells per square millimeter by counting all TUNEL-positive cells. Afterwards, the ratios of right side numerical density to the sum of right and left sides' numerical densities (right apoptosis index) were calculated for every brain region in rats receiving L-carnitine and they were compared with the vehicle groups. The right apoptosis indexes of the hippocampus (37.4 ± 18.8; mean ± SD) and striatum (39.2 ± 15.2) in rat pups pre-treated with L-carnitine were significantly lower than those in the vehicles (59.8 ± 17.9 vs. 60.4 ± 19.6 respectively) (p< 0.05), whereas they were not changed by L-carnitine pre-treatment in the cortex. Additionally, L-carnitine post-treatment had no effect on right apoptosis indexes in any of the three brain regions. It is concluded that pre-treatment with L-carnitine might play a role in reducing apoptotic cell death due to neonatal hypoxic ischemic brain injury. Our results suggested that L-carnitine was useful in perinatal asphyxia for preventing hypoxic ischemic brain injury.
    Restorative neurology and neuroscience 01/2010; 28(6):817-24. · 2.93 Impact Factor
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    ABSTRACT: We investigated the relationship between total serum bilirubin and serum Tau and S100B protein levels, and predicted a cutoff level of bilirubin-induced neurotoxicity in term newborns. Total serum bilirubin, serum Tau, and S100B levels were measured in 92 jaundiced term newborns. A neurologic examination, electroencephalogram, brainstem auditory-evoked response, and otoacoustic emission were performed in the infants on admission and at age 3 months. Serum Tau (r = 0.921, P < 0.001) and S100B (r = 0.927, P < 0.001) levels were correlated with total serum bilirubin levels in all infants. Serum Tau and S100B protein levels remained at a steady level up to a total serum bilirubin level of 19.1 mg/dL, and then demonstrated a significant increase. Mean total serum bilirubin, serum Tau, and S100B levels of infants who manifested auditory neuropathy, neurologic abnormalities, or electroencephalogram abnormalities were significantly higher than in infants without these abnormalities (P < 0.05). Clinical and laboratory findings of bilirubin-induced neurotoxicity developed after a total serum bilirubin level of 22 mg/dL was reached. Serum levels of Tau and S100B proteins in jaundiced term newborns were strongly correlated with early-phase bilirubin encephalopathy.
    Pediatric Neurology 10/2008; 39(4):245-52. · 1.42 Impact Factor
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    ABSTRACT: To evaluate the association between glycemic levels with glucose loading test during pregnancy and maternal and perinatal outcomes. Retrospective analysis of 2059 singleton pregnancies screened for gestational diabetes mellitus at Gazi University Faculty of Medicine, Department of Obstetrics and Gynecology between January 2004 and December 2006 was conducted. Sensitivity and specificity of the 50 g glucose loading test was calculated for different cut-off values in our population. Maternal and perinatal outcomes in different groups with different results after screening test were compared. An increase in cut-off value from 140 to 145 mg/dl seems to be associated with a significant increase in specificity along with a tolerable decrease in sensitivity. A cut-off value of 147.5 mg/dl is associated with a higher specificity and a slightly lower sensitivity. However, the cut-off value 150 mg/dl seems to be associated with a significant decrease in sensitivity. As for the upper limit, a cut-off value of 180 mg/dl is associated with a 90% specificity and a cut-off value of 200 mg/dl is associated with a 99% specificity. A 100% specificity could be reached only after a cut-off value of 221 mg/dl. A GLT value of 180 mg/dl or higher was found to be associated with poor maternal and fetal outcomes, regardless of the result obtained after the diagnostic test. Results obtained after 50 g GLT should be evaluated separately for each patient and the diagnostic test which is time-consuming, uncomfortable and expensive can be omitted up to a cut-off value of 147.5 mg/dl, especially for those patients with no risk factors. Besides, a GLT value of 180 mg/dl or higher proves the diagnostic test unnecessary as these patients are associated with unfavorable perinatal and fetal outcomes.
    Diabetes research and clinical practice 05/2008; 80(1):69-74. · 2.74 Impact Factor
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    ABSTRACT: Enterocutaneous fistula (EF) in newborns and prematures is a well-recognized complication after necrotizing enterocolitis and other abdominal surgical procedures. Conservative management consists of bowel rest, antibiotics, wound care, and the administration of drugs that either reduce gastrointestinal motility or secretions. Octreotide decreases gastrointestinal secretions, inhibits or blocks the effects of gastrointestinal hormones, diminishes gut motility and thus reduces the flow through the fistula. We used octreotide and were able to report successful spontaneous closure of a fistula in our 2 neonatal patients, one a premature neonate with necrotizing enterocolitis (NEC) and the other with meconium peritonitis.
    European Journal of Pediatric Surgery 03/2008; 18(1):56-8. · 0.84 Impact Factor
  • Early Human Development - EARLY HUM DEV. 01/2008; 84.