Browsing by Author "Akpinar, Ihsan"

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Evaluation of Renal Resistivity Index Before and After Voiding Cystoureterography Examination in Patients With Vesicoureteral Reflux
(Sage Publications inc, 2010) Avcu, Serhat; Akpinar, Ihsan; Biren, Tugrul
Vesicoureteral reflux (VUR) occurs commonly in children and can cause significant renal damage. The purpose of this study is to assess the changes in renal vasculature with spectral Doppler sonog-raphy in patients with VUR. In addition, the possible effects of voiding cystoureterography (VCU) on the kidneys in patients with VUR are investigated by calculating renal resistivity index (RI) values before and after VCU using spectral Doppler sonography. In this prospective study, 114 kidneys of 58 children ages 0 to 16 years were included. The RI values that were calculated before and after VCU and RI values in different grades of VUR were compared statistically. In patients with VUR, the renal parenchymal RI values before and after VCU were significantly higher than those in patients without VUR (P < .05). The mean pre-VCU RI values were 0.68 +/- 0.03 and 0.65 +/- 0.05 in patients with VUR and in the control group, respectively, and the mean post-VCU RI values were 0.68 +/- 0.03 and 0.65 +/- 0.04 in patients with VUR and in the control group, respectively. Calculating renal RI values from arcuate or interlobar renal arteries with spectral Doppler sonography while the patients are in a supine or lateral decubitus position is a useful technique in patients with VUR, being significantly higher in high-grade VUR patients than in low-grade VUR patients. There is no significant effect of the contrast agent reaching the renal calycial system during VCU examination on renal RI values.
Knee Joint Examinations by Magnetic Resonance Imaging: the Correlation of Pathology, Age, and Sex
(Medknow Publications & Media Pvt Ltd, 2010) Avcu, Serhat; Altun, Ersan; Akpinar, Ihsan; Bulut, Mehmet Deniz; Eresov, Kemal; Biren, Tugrul
Aims: The aim of our study was to investigate the incidence and coexistence of multiple knee joint pathologies and the distribution of knee joint pathologies according to age and sex. Patients and Methods: A retrospective analysis was performed using the clinical data of patients evaluated with magnetic resonance imaging (MRI) of the knee joint. Data from 308 patients examined between August 2002 and July 2003 were included into this study. A Pearson correlation analysis was performed to examine the relationship between the pathological findings and the age and sex of the patients. Results: The ages of the patients ranged between 1 and 74 years (mean: 43.3 years). Age was significantly correlated with meniscal degeneration and tears, medial collateral ligament degeneration, parameniscal cyst, and chondromalacia patellae. There was a significant correlation between male gender and anterior cruciate ligament injury. Meniscal injury was significantly correlated with bursitis, as well as medial collateral ligament injury. Bone bruise was significantly correlated with medial collateral ligament injury, lateral collateral ligament injury, Baker's cyst, and anterior cruciate ligament injury. Chondromalacia patellae was significantly correlated with anterior cruciate ligament injury, patellae alta, and osteochondral lesion. Bursitis (in 53.2% of the patients) followed by grade-II meniscal degeneration (in 43% of the patients) were the most common knee pathologies observed by MRI. Conclusions: MRI findings of select knee pathologies are significantly correlated with each other and the age and sex of the patient.