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Dive into the research topics where Nejat Aksu is active.

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Featured researches published by Nejat Aksu.


Pediatric Pulmonology | 2010

High volume normal saline alone is as effective as nebulized salbutamol‐normal saline, epinephrine‐normal saline, and 3% saline in mild bronchiolitis

Ayse Berna Anil; Murat Anil; Ayse Bircan Saglam; Nevin Çetin; Alkan Bal; Nejat Aksu

The objective of this study was to investigate the effectivenesses of nebulized salbutamol, epinephrin, 3% saline, and normal saline (0.9% NaCl) in the treatment of mildly affected infants with acute bronchiolitis. We enrolled 186 children (mean age 9.5 ± 5.3 months, range 1.5–24 months, 65.1% male) with a first episode of wheezing diagnosed as mild bronchiolitis in emergency department. Patients were randomized in a double‐blind fashion to receive 4 ml dose either of 1.5 mg epinephrine plus normal saline (group 1; n = 38) or 1.5 mg epinephrine plus 3% saline (group 2; n = 39) or 2.5 mg salbutamol plus normal saline (group 3; n = 36) or 2.5 mg salbutamol plus 3% saline (group 4; n = 36) or normal saline alone (group 5; n = 37) at 0 and 30 min. Thus, all treatment modalities included high amount of NaCl (72–240 mg). Clinical score, oxygen saturation and heart rate were assessed at 0, 30, 60, and 120 min. After discharge, patients were reassessed by telephone contact at 48 hr and 6 months. The baseline characteristics were similar in all groups (P > 0.05). The outcome of patients at 120 min was found significantly better than the baseline values (P < 0.05). There were no significant differences between the outcome variables of the groups (P > 0.05). No adverse effects attributable to nebulized therapy were seen. In conclusion, all treatment modalities used in this study, including a total of 8 ml normal saline inhalation at 30‐min interval showed clinically significant and swift improvement in mildly affected ambulatory infants with acute bronchiolitis. Pediatr Pulmonol. 2010; 45:41–47.


Journal of The American Society of Nephrology | 2007

Peritonitis in Children Who Receive Long-Term Peritoneal Dialysis: A Prospective Evaluation of Therapeutic Guidelines

Bradley A. Warady; Reinhard Feneberg; Enrico Verrina; Joseph T. Flynn; Dirk E. Müller-Wiefel; Nesrin Besbas; Aleksandra Zurowska; Nejat Aksu; Michel Fischbach; Ernesto Sojo; Osman Dönmez; Lale Sever; Aydan Sirin; Steven R. Alexander; Franz Schaefer

In children who are on chronic peritoneal dialysis, peritonitis is the primary complication compromising technique survival, and the optimal therapy of peritonitis remains uncertain. An Internet-based International Pediatric Peritonitis Registry was established in 47 pediatric centers from 14 countries to evaluate the efficacy and safety of largely opinion-based peritonitis treatment guidelines in which empiric antibiotic therapy was stratified by disease severity. Among a total of 491 episodes of nonfungal peritonitis entered into the registry, Gram-positive organisms were cultured in 44%, Gram-negative organisms were cultured in 25%, and cultures remained negative in 31% of the episodes. In vitro evaluation revealed 69% sensitivity of Gram-positive organisms to a first-generation cephalosporin and 80% sensitivity of Gram-negative organisms to a third-generation cephalosporin. Neither the risk factors assumed by the guidelines nor the choice of empiric therapy was predictive of either the early treatment response or the final functional outcome of the peritonitis episodes. Overall, 89% of cases achieved full functional recovery, a portion after relapsing peritonitis (9%). These data serve as the basis for new evidence-based guidelines. Modification of empiric therapy to include aminoglycosides should be considered.


Peritoneal Dialysis International | 2012

Impact of global economic disparities on practices and outcomes of chronic peritoneal dialysis in children: insights from the International Pediatric Peritoneal Dialysis Network Registry

Franz Schaefer; Dagmara Borzych-Duzalka; Marta Azocar; Reyner Loza Munarriz; Lale Sever; Nejat Aksu; Lorena Sànchez Barbosa; Yajaira Silva Galan; Hong Xu; Paula A. Coccia; Attila J. Szabó; William Wong; Rosana Salim; Enrico Vidal; Stephen Pottoore; Bradley A. Warady

♦ Background, Objectives, and Methods: The number of patients on chronic peritoneal dialysis (CPD) is increasing rapidly on a global scale. We analyzed the International Pediatric Peritoneal Dialysis Network (IPPN) registry, a global database active in 33 countries spanning a wide range in gross national income (GNI), to identify the impact of economic conditions on CPD practices and outcomes in children and adolescents. ♦ Results: We observed close associations of GNI with the fraction of very young patients on dialysis, the presence and number of comorbidities, the prevalence of patients with unexplained causes of end-stage kidney disease, and the rate of culture-negative peritonitis. The prevalence of automated PD increased with GNI, but was 46% even in the lowest GNI stratum. The GNI stratum also affected the use of biocompatible peritoneal dialysis fluids, enteral tube feeding, calcium-free phosphate binders, active vitamin D analogs, and erythropoiesis-stimulating agents (ESAs). Patient mortality was strongly affected by GNI (hazard ratio per


Pediatric Nephrology | 2005

ACE gene insertion/deletion polymorphism in childhood idiopathic nephrotic syndrome.

Erkin Serdaroglu; Sevgi Mir; Afig Berdeli; Nejat Aksu; Mustafa Bak

10 000: 3.3; 95% confidence interval: 2.0 to 5.5) independently of young patient age and the number of comorbidities present. Patients from low-income countries tended to die more often from infections unrelated to CPD (5 of 9 vs 15 of 61, p = 0.1). The GNI was also a strong independent predictor of standardized height (p < 0.0001), adding to the impact of congenital renal disease, anuria, age at PD start, and dialysis vintage. Patients from the lower economic strata (GNI <


Pediatrics International | 2009

Peritonitis rates and common microorganisms in continuous ambulatory peritoneal dialysis and automated peritoneal dialysis

Sema Akman; Sevcan A. Bakkaloglu; Mesiha Ekim; Lale Sever; Aytül Noyan; Nejat Aksu

18 000) had higher serum parathyroid hormone (PTH) and lower serum calcium, and achieved lower hemoglobin concentrations. No impact of GNI was observed with regard to CPD technique survival or peritonitis incidence. ♦ Conclusions: We conclude that CPD is practiced successfully, albeit with major regional variation related to economic differences, in children around the globe. The variations encompass the acceptance of very young patients and those with associated comorbidities to chronic dialysis programs, the use of automated PD and expensive drugs, and the diagnostic management of peritonitis. These variations in practice related to economic difference do not appear to affect PD technique survival; however, economic conditions seem to affect mortality on dialysis and standardized height, a marker of global child morbidity.


Pediatric Nephrology | 2005

Percutaneous nephrostomy in children: diagnostic and therapeutic importance

Onder Yavascan; Nejat Aksu; Hakan Erdogan; Yahya Aydin; Orhan Deniz Kara; Murat Kangin; Ali Kanik

Abstract The aim of this study was to determine the distribution of angiotensin converting enzyme (ACE) gene insertion/deletion (I/D) polymorphism, and its effects on clinical, laboratory, histological findings, treatment responses and progression to end-stage renal disease in childhood idiopathic nephrotic syndrome (NS). 227 children diagnosed with idiopathic NS were included in the study. Eighty-three of patients were steroid resistant and 77 of patients were focal segmental glomerulosclerosis. The control group was consisted of 287 unrelated healthy adult volunteers. ACE gene I/D polymorphism were analyzed by using PCR based method. In the entire group of children with NS, the frequencies of the II, ID, and DD genotypes of ACE gene were 13.7%, 38.3% and 48%, respectively. D allele frequency was higher in NS group than control group (0.67 vs. 0.56, p=0.001). Percentage of frequent relapser patients was found more frequently in ID or DD genotype (38.7%) than II genotype (15%) when only steroid sensitive patients were evaluated (p=0.045). The D-allele frequency was 0.65, 0.69 and 0.68 respectively in focal segmental glomerulosclerosis, biopsy proven minimal change and entire minimal change group (p>0.05) and 0.69 and 0.64 respectively in steroid sensitive and resistant groups (p>0.05). D allele frequency was not significantly different in patients with or without end-stage renal disease (0.64 vs. 0.67 respectively, p>0.005) when 115 patients who were at least five year follow-up were evaluated. The D allele frequency was higher in NS patients than healthy controls and DD or ID genotype was related with frequent relapses. ACE gene I/D polymorphism was not important in laboratory and histological findings and progression of the disease in children with NS.


Renal Failure | 2012

The Performance of Acute Peritoneal Dialysis Treatment in Neonatal Period

Caner Alparslan; Onder Yavascan; Alkan Bal; Ali Kanik; Engin Kose; Belde Kasap Demir; Nejat Aksu

Background:  The aim of the present study was to perform a multicenter investigation in Turkish children on chronic peritoneal dialysis by examining the rates of peritonitis as well as causative organisms according to year.


Pediatric Nephrology | 2003

No mutation in the SLC2A2 ( GLUT2) gene in a Turkish infant with Fanconi-Bickel syndrome.

Esra Arun Ozer; Nejat Aksu; Erkan Uclar; Hakan Erdogan; Ali Rahmi Bakiler; Masahiko Tsuda; Emiko Kitasawa; Mahmut Çoker; Erdener Özer

The aim of this study was to evaluate the effectiveness and safety of percutaneous nephrostomy (PN) in terms of diagnostic and therapeutic approach in children with urological problems. PN was performed on 39 kidneys in 28 patients (12 girls, 16 boys) aged 4.5 months to 13 years (average 5.38±3.41 years) during the period from January 1996 to December 2003. Underlying abnormalities were ureteropelvic junction obstruction (UPJO) in 14 patients (17 kidneys), ureterovesical junction obstruction (UVJO) in six patients (eight kidneys), supravesical obstruction due to tumour or hydatid cyst or ureteral stone in three patients (five kidneys), and severe vesicoureteral reflux (VUR) with/without neurogenic bladder associated with pyonephrotic kidneys in five patients (nine kidneys). The duration of catheter insertion was between 2 and 160 days (average 80±65.01 days). The complications were haematuria (six cases), infection (five cases) and displacement of catheter (four cases). Radical surgical management was performed in 25 patients (33 kidneys): pyeloplasty in eight cases (ten kidneys), UVJO correction in six cases (eight kidneys), nephrectomy in five cases (five kidneys), ureteroneocystostomy in four cases (seven kidneys), hydatid cyst operation in one case (two kidneys) and stone extraction in one case (one kidney). PN is an easy, safe and efficient diagnostic and therapeutic procedure with few complications in childhood.


Nephrology Dialysis Transplantation | 2010

Impact of peritoneal transport characteristics on cardiac function in Paediatric peritoneal dialysis patients: a Turkish Pediatric Peritoneal Dialysis Study Group (TUPEPD) report

Sevcan A. Bakkaloglu; Arda Saygili; Lale Sever; Nejat Aksu; Aytül Noyan; Sema Akman; Mesiha Ekim; Beyza Doganay; Nurdan Yildiz; Figen Akalın; Salim Caliskan; Orhan Deniz Kara; Ali Duzova; Alper Soylu; Semra Atalay

The aim of this retrospective study was to evaluate our neonatal intensive care unit (NICU) patients’ characteristics treated with acute peritoneal dialysis (PD) and their risk factors for mortality. We also wanted to share our experience of the application of PD in neonates who required less than 60 mL of dwell volume and their PD-related problems, as well as special solutions for these problems. This study included 27 infants treated in our NICU between February 2008 and December 2011. We retrospectively analyzed these patients’ records. The percutaneous PD catheter was placed by us. PD procedure was performed either by manual technique or automated PD. Statistical evaluation was performed by using χ2-tests and Student’s t-tests. In these 27 neonates, the average gestational age and birth weight were 35.18 ± 4.02 weeks and 2534.62 ± 897.41 g, respectively. The mean PD duration time was 6.11 ± 6.30 days. Of these, 10 patients were treated by manual technique, whereas 17 patients were treated with automated system. Among 27 neonates, 16 patients died. Overall mortality rate was 59.25%. PD-related complications were seen in 25.92% of patients. In conclusion, PD application is less effective and troublesome for low-birth-weight infants. Each center should create its own solutions to accommodate problematic patients in PD treatment to improve the outcome in this special population.


Renal Failure | 2013

The effect of circumcision on the frequency of urinary tract infection, growth and nutrition status in infants with antenatal hydronephrosis

Engin Kose; Onder Yavascan; Ozlem Turan; Murat Kangin; Alkan Bal; Caner Alparslan; Seda Sirin Kose; Pınar Kuyum; Nejat Aksu

Fanconi-Bickel syndrome (FBS), or glycogen storage disease type XI, is a rare, well-defined clinical entity. Recently, this disease was elucidated to link mutations in the SLC2A2 gene in many ethnic groups, indicating that FBS is a single gene disease. We report here an 8-month-old Turkish girl who developed characteristic findings of FBS. However, no mutation was detected in the protein-coding region of the SLC2A2 gene. Therefore, we propose that further molecular analysis is needed to determine whether other genes are involved in FBS.

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Engin Kose

Dokuz Eylül University

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Mehmet Helvaci

Boston Children's Hospital

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Belde Kasap

Dokuz Eylül University

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