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    Comparison of the results of pediatric percutaneous nephrolithotomy with different sized instruments
    (Springer, 2017) Celik, Huseyin; Camtosun, Ahmet; Dede, Onur; Dagguli, Mansur; Altintas, Ramazan; Tasdemir, Cemal
    We aim to compare the outcomes, including the morbidity and success rates in children undergoing percutaneous nephrolithotomy (PCNL) using different sized devices. According to the size of instruments used during surgery, three different groups (ultra-mini-PCNL, mini-PCNL and adult size PCNL) were composed and the outcomes were compared between the groups. PCNL was applied to 225 renal units of 220 children, including 5 patients with bilateral kidney stones. Percutaneous nephrolithotomy was performed using adult instruments (24 F) in 82 renal units, using pediatric instruments (18 F) in 89 and using minimal-size instruments (9.5 F) in 50. One-hundred and twenty-four girls and 96 boys with a mean age of 8.33 (< 17) years were assessed. Stone-free rates were 78 % in group 1 (n = 39) using 9.5 F nephroscope, 75.8 % in group 2 (n = 69) using 18 F nephroscope and 71.4 % in group 3 (n = 60) using 24 F nephroscope. Time to access the collecting system, operative time, duration of nephrostomy and average postoperative hospital stay did not differ between the groups. However, mean hematocrit drop and stone burden were significantly lesser in ultra-mini-PCNL group. There was no significant difference in the complication rates between the groups, according to the modified Clavien classification system. As the important complication of PCNL, bleeding seems to be associated with diameter of dilatation, calibre of nephroscopes and stone burden. To reduce the certain complications, pediatric type of instruments is suitable but the use of adult instruments and techniques may achieve equal results.
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    Öğe
    Is the Romer Hypothesis valid for Newly Industrialized Countries? Evidence from panel ARDL
    (Univ Islam Indonesia, 2024) Celik, Huseyin; Alev, Nigar; Erdemli, Muhyettin
    Purpose & horbar; This study investigates the effect of trade openness on inflation, referred to as the Romer hypothesis, for Newly Industrialized Countries (NICs) from 1990 to 2022. Methods & horbar; It uses a panel ARDL method and the Dumitrescu-Hurlin (2012) causality test. Economic growth, credit, and money supply are included in the model as independent variables. Findings & horbar; The findings reveal no statistically significant long-term and short-term relationships between trade openness and inflation. However, money supply has statistically significant positive effects on inflation in the long run, while economic growth and credit exhibit no statistically significant impact. In the short run, money supply and economic growth reduced inflation. According to the Dumitrescu-Hurlin (2012) panel causality test, a bidirectional relationship exists between inflation and economic growth, money supply, and credit, while a unidirectional relationship is observed between inflation and trade openness. Implications & horbar; Reducing the external dependency of sectors that rely on imported inputs is necessary to mitigate the adverse effects of trade openness on inflation in NICs. It is crucial to ensure that monetary policy helps align money supply and credit expansions with real sector trends. Originality & horbar; This research is pioneering in its focus on testing the Romer hypothesis for Newly Industrialized Countries (NICs).