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Dive into the research topics where Hilal Özkan is active.

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Featured researches published by Hilal Özkan.


Journal of Maternal-fetal & Neonatal Medicine | 2012

Increased incidence of bronchopulmonary dysplasia in preterm infants exposed to preeclampsia.

Hilal Özkan; Merih Çetinkaya; Nilgün Köksal

Objective: The aims of the study were to determine the effect of preeclampsia on bronchopulmonary dysplasia (BPD) development in preterm infants and to investigate the possible association between BPD severity and preeclampsia. Methods: The study group involved preterm infants (≤32 gestational week) born to a preeclamptic mother with no co-existing medical condition, whereas the comparison group involved preterm infants born to a normotensive mother. BPD was defined as requirement for supplemental oxygen for the first 28 days of life and classified as mild, moderate and severe. Results: There were a total of 117 and 215 premature infants that were born to a preeclamptic mother and a normotensive mother, respectively. The incidence of BPD in preterm infants born to preeclamptic mothers (38.5%) was significantly higher than those born to normotensive mothers (19.5%). Frequencies of moderate and severe BPD were significantly higher in the infants born to preeclamptic mothers. Moderate and severe BPD was also significantly higher in infants born to a mother with severe preeclampsia compared with a mother with mild preeclampsia. In logistic regression model, preeclampsia was found to be predictive of BPD. Conclusions: Preeclampsia was found to be an important risk factor for BPD development in preterm infants. The incidence of both moderate and severe BPD was significantly higher in infants born to preeclamptic mothers. These findings might be associated with altered angiogenesis in the preeclamptic mother which might be shared by the fetus.


Journal of Pediatric Surgery | 2011

Comparison of the efficacy of serum amyloid A, C-reactive protein, and procalcitonin in the diagnosis and follow-up of necrotizing enterocolitis in premature infants

Merih Çetinkaya; Hilal Özkan; Nilgün Köksal; Okan Akacı; Taner Ozgur

PURPOSE The aim of this study was to compare the efficacy of serum amyloid A (SAA) with that of C-reactive protein (CRP), and procalcitonin (PCT) in diagnosis and follow-up of necrotizing enterocolitis (NEC) in preterm infants. METHODS A total of 152 infants were enrolled into this observational study. The infants were classified into 3 groups: group 1 (58 infants with NEC and sepsis), group 2 (54 infants with only sepsis), and group 3 (40 infants with neither sepsis nor NEC, or control group). The data including whole blood count, CRP, PCT, SAA, and cultures that were obtained at diagnosis (0 hour), at 24 and 48 hours, and at 7 and 10 days were evaluated. RESULTS A total of 58 infants had a diagnosis of NEC. Mean CRP (7.4 ± 5.2 mg/dL) and SAA (46.2 ± 41.3 mg/dL) values of infants in group 1 at 0 hour were significantly higher than those in groups 2 and 3. Although the area under the curve of CRP was higher at 0 hour in infants with NEC, there were no significant differences between groups with respect to the areas under the curve of SAA, CRP, and PCT at all measurement times. Levels of SAA decreased earlier than CRP and PCT in the follow-up of NEC (mean SAA levels were 45.8 ± 45.2, 21.9 ± 16.6, 10.1 ± 8.3, and 7.9 ± 5.1 mg/dL at evaluation times, respectively). Levels of CRP and SAA of infants with NEC stages II and III were significantly higher than those with only sepsis and/or NEC stage I. CONCLUSIONS Serum amyloid A, CRP, and PCT all are accurate and reliable markers in diagnosis of NEC, in addition to clinical and radiographic findings. Higher CRP and SAA levels might indicate advanced stage of NEC. Serial measurements of SAA, CRP, and PCT, either alone or in combination, can be used safely in the diagnosis and follow-up of NEC.


Pediatrics International | 2014

Culture-proven neonatal sepsis in preterm infants in a neonatal intensive care unit over a 7 year period: coagulase-negative Staphylococcus as the predominant pathogen.

Hilal Özkan; Merih Çetinkaya; Nilgün Köksal; Solmaz Celebi; Mustafa Hacimustafaoglu

The aim of this study was to determine the causative agents in early, late‐ and very late‐onset sepsis in preterm infants. The demographic features, risk factors, clinical and laboratory findings in sepsis types were also defined.


Early Human Development | 2012

Maternal preeclampsia is associated with increased risk of necrotizing enterocolitis in preterm infants.

Merih Çetinkaya; Hilal Özkan; Nilgün Köksal

BACKGROUND Necrotizing enterocolitis (NEC) is an important cause of mortality and morbidity in preterm infants. AIMS To evaluate the effect of maternal preeclampsia on the development and severity of NEC in premature infants. STUDY DESIGN Prospective observational study in a tertiary neonatal intensive care unit. SUBJECTS The preterm infants of ≤ 37 gestational age who were consecutively hospitalized were enrolled. The study group contained preterm infants born to a preeclamptic mother and the comparison group contained preterm infants born to a normotensive mother. OUTCOME MEASURES The primary outcome was to determine the association between preeclampsia and NEC. RESULTS A total of 88 infants had NEC diagnosis. The incidence of NEC in infants born to preeclamptic mothers (22.9%) was significantly higher compared with those born to normotensive mothers (14.6%). According to NEC stages, NEC was more advanced in preeclamptic mother infants. NEC developed significantly earlier in infants with NEC in the study group. The duration of NEC was also significantly longer in infants born to preeclamptic mothers. In multiple logistic regression model, preeclampsia was found to be predictive of NEC with an odds ratio of 1.74 (95% confidence interval 0.64-0.92). CONCLUSIONS Maternal preeclampsia may be an important risk factor for the development of NEC in premature infants as NEC incidence and severity of NEC were found to be significantly higher in premature infants born to preeclamptic mothers. The onset of NEC was significantly earlier and duration of NEC was longer in these infants.


Journal of Maternal-fetal & Neonatal Medicine | 2009

Neonatal outcomes of premature infants born to preeclamptic mothers

Merih Çetinkaya; Hilal Özkan; Nilgün Köksal; Zuhal Karali; Taner Ozgur

OBJECTIVE Only limited studies with conflicting results are available on neonatal morbidity and mortality in infants born to preeclamptic mothers. The objective of this study was to evaluate neonatal morbidity and mortality in premature infants born to preeclamptic mothers. METHODS Premature infants who were admitted to Uludag University, School of Medicine, Neonatal Intensive Care Unit between June 2006 and December 2007 were included in this study. The infants were evaluated according to their demographic characteristics and neonatal morbidities. RESULTS Fifty-one infants born to preeclamptic mothers (study group) and 33 gestational age- and gender-matched infants born to normotensive mothers (control group) were included in this study. No statistical difference was found between the two groups in terms of demographic characteristics. However, frequency of neutropenia, duration of mechanical ventilation, and neonatal sepsis rates were found to be significantly higher in the study group compared with those of the control group. Although the rates of other neonatal morbidities such as bronchopulmonary dysplasia, retinopathy of prematurity, intraventricular hemorrhage and necrotising enterocolitis were found to be higher in the study group, the difference was not statistically significant. Mortality rates were also found to be similar in both groups. CONCLUSIONS The infants born to preeclamptic mothers had significantly higher rates of neutropenia and sepsis. There were no significant difference in terms of other neonatal morbidities and neonatal mortality between the study and the control group.


Pediatrics International | 2009

Colistimethate sodium therapy for multidrug‐resistant isolates in pediatric patients

Solmaz Celebi; Mustafa Hacimustafaoglu; Nilgün Köksal; Hilal Özkan; Merih Çetinkaya

Aim:  The aim of the present study was to assess the efficacy and safety of colistimethate sodium therapy in multidrug‐resistant nosocomial infections caused by Pseudomonas aeruginosa or Acinetobacter baumannii in neonates and children.


Pediatrics International | 2012

Neonatal candidiasis: Results of an 8 year study

Solmaz Celebi; Mustafa Hacimustafaoglu; Nilgün Köksal; Hilal Özkan; Merih Cetinkaya; Beyza Ener

Background:  The aim of the present study was to evaluate the risk factors, demographic features, treatment and clinical outcome associated with candidemia in a neonatal intensive care unit (NICU) within an 8 year period.


Journal of Maternal-fetal & Neonatal Medicine | 2011

Severe fetal valproate syndrome: combination of complex cardiac defect, multicystic dysplastic kidney, and trigonocephaly

Hilal Özkan; Merih Çetinkaya; Nilgün Köksal; Şenay Yapici

Valproic acid (VPA) is a teratogenic drug used in pregnant women for the treatment of epilepsy and mood disorders. Fetal valproate syndrome (FVS) is characterized by a number of abnormalities associated with VPA exposure in utero including neural tube defects, congenital heart defects, limb defects, genitourinary defects, brain, eye and respiratory anomalies, and abdominal wall defects. Complex cardiac defect and trigonocephaly have rarely been reported and multicystic dysplastic kidney has never been detected in FVS. We here report a female infant who was born to a mother with a history of low-dose VPA monotherapy (250 mg/day) during pregnancy and who had presented with a combination of unilateral multicystic dysplastic kidney, multicomplex cardiac defect including severe coarctation of aorta, Ebstein anomaly, secundum atrial septal defect, mesocardia along with trigonocephaly due to metopic craniosynostosis, typical facial appearance and limb defects. To our knowledge, this is the first case presented with multicystic dysplastic kidney, complex cardiac defect, trigonocephaly and other limb and facial defects because of exposure to very low-dose VPA monotherapy (250 mg/day) in utero. We conclude that VPA must be used very cautiously in pregnant women even as monotherapy and in low doses to prevent major congenital defects.


American Journal of Critical Care | 2012

A New Scoring System For Evaluation of Multiple Organ Dysfunction Syndrome in Premature Infants

Merih Çetinkaya; Nilgün Köksal; Hilal Özkan

BACKGROUND The Neonatal Multiple Organ Dysfunction (NEO-MOD) scoring system is used to predict mortality in infants with multiple organ dysfunction syndrome (MODS). The NEOMOD scoring system was extended to include involvement of the microvascular system. This modified scoring system was developed to enable more accurate and earlier diagnosis of MODS in premature infants. OBJECTIVE To evaluate the modified NEOMOD scoring system in preterm infants with MODS and compare its effectiveness with the NEOMOD scoring system. METHODS This prospective study was performed in a tertiary neonatal intensive care unit. A total of 198 premature infants were enrolled. Infants were evaluated for development of MODS by using the modified NEOMOD scoring system until discharge or death according to clinical and laboratory findings. Infants who had organ dysfunction in 2 or more organ systems had MODS diagnosed. RESULTS In the 160 infants (80.8%) with MODS, the gastrointestinal system, respiratory system, and hematologic system were involved most often. The gastrointestinal system, respiratory system, and acid-base metabolism were involved initially in 99.4%, 86.3%, and 26.3% of infants, respectively. The mean modified NEOMOD score for the infants who died in the first 28 days after birth was significantly higher than the mean score for infants who survived. The number of systems involved was also higher in infants who died. CONCLUSIONS The modified NEOMOD scoring system is a safe and accurate tool for determining both mortality rate and dysfunction of multiple organ systems affecting mortality in pre-term infants.


Clinical Dysmorphology | 2008

Spondylocostal dysostosis associated with diaphragmatic hernia and neural tube defects.

Cetinkaya M; Hilal Özkan; Nilgün Köksal; Yalçinkaya U

Key features of Jarcho–Levin syndrome Short stature, short trunk, cleft palate, cleft uvula, short neck, meningocele/meningo-myelocele, scoliosis, fusion of vertebrae, hemivertebrae, platyspondyly, segmentation defects of spine, spina bifida occulta, short thorax, heart, general abnormalities, atrial septum defect, anomalous venous return, atrioventricular septal defect, coarctation/ interrupted aorta, pulmonary stenosis, ventricular septal defect, lung hypoplasia/agenesis, pulmonary segmentation defects, trachea or laryngeal anomalies, bifid/fused ribs, thin ribs, winged scapulae, anal atresia/stenosis, absent testis, cryptorchid testes, hydronephrosis, webbing at elbow, arachnodactyly, tapering fingers, flexion deformity of knee, webbing of knee, congenital (1-month) onset, prominent occiput, dimples, capillary hemangioma.

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