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Öğe ARACHNOID GRANULATIONS: FREQUENCY AND DISTRIBUTION IN MULTI-DETECTOR ROW CT OF DURAL SINUSES(Taylor & Francis Ltd, 2009) Bayrak, A. H.; Akay, H. O.; Ozmen, C. A.; Senturk, S.Arachnoid granulations ore normal variants that protrude into the cerebral venous sinus lumen and produce focal defects in cerebral venography, contrast enhanced CT and MRI. It should be differentiated from other lesions within the dural sinus lumen that produce focal defects. In the present study, we investigated the frequency and positional distribution of arachnoid granulations with multi-defector row CT Simple post processing procedures on thin slice multi-detector row CT were performed. We found arachnoid granulations in nearly half of our participants. We observed that presence of arachnoid granulations showed no tendency in two sexes. No relationship between age and multiplicity, and an inverse relationship between age and the variants size existed. We concluded that as imaging technology continues to develop, the frequency with which normal variants are identified will also increase. Arachnoid granulations are a normal variant that all radiologists should be aware of and which should not be mistaken for pathological intra-sinus lesions. The relationship between characteristics of the variant (presence, number, size) and of the human subjects (gender, age) should be reviewed with larger samples.Öğe Does the direction of arterial needle in AV fistula cannulation affect dialysis adequacy?(Dustri-Verlag Dr Karl Feistle, 2008) Ozmen, S.; Kadiroglu, A. K.; Ozmen, C. A.; Danis, R.; Sit, D.; Akin, D.; Yilmaz, M. E.Aim: The direction of arterial access needles in fistulas and grafts has been a subject of some controversy and there is no study comparing the results either direction of arterial needle placement in cannulation of arteriovenous fistula. We compared mean urea reduction rate (URR) and Kt/V in the same HD patients when dialyzed via antegrade or retrograde arterial needle cannulation. Materials and methods: This was a study involving 22 adults oil maintenance hemodialysis for more than 6 months. Doppler US examinations of arteriovenous fistula were performed in all Subjects. Pre-dialysis and post-dialysis blood samples were obtained at the patient's midweek HD treatment 4 times a month for each direction. Arterial needle was placed in retrograde direction for the first month. Oil the second month, the direction of arterial needle was converted to antegrade. Means were compared by paired t-test. Results: Mean URR and eKt/Vof retrograde cannulation were 74.2 +/- 7.2% and 1.57 +/- 0.33. The results were indifferent statistically from those of antegrade cannulation (73.0 +/- 8.7% and 1.57 +/- 0.35 (p = 0.123)). Mean fistula blood flow was 931 +/- 483 ml/min. No cannulation complication was observed during the study period for both directions. Conclusions: Both antegrade and retrograde arterial needle placement may be preferred according to center experience without concern of HD adequacy. Longterm outcomes of antegrade and retrograde arterial needle placement such as AVF failure, thrombosis, and stenosis warrant further studies.Öğe Evaluation of pericardial sinuses and recesses with 2-, 4-, 16-, and 64-row multidetector CT(Springer, 2010) Ozmen, C. A.; Akpinar, M. G.; Akay, H. O.; Demirkazik, F. B.; Ariyurek, M.Purpose. The aim of this study was to describe visualisation rate and appearance of all pericardial sinuses and recesses and to evaluate whether there is a significant difference between visualisation of these sinuses and recesses on 2-, 4-, 16- and 64-slice multidetector computed tomography (MDCT). Materials and methods. We retrospectively analysed 588 MDCT scans of the chest obtained with a protocol for pulmonary embolism. Results. The visualisation rate of any pericardial recess was 85.2%. The rates on 2-, 4-, 16- and 64-slice MDCT were 74.7%, 90.6%, 90.3% and 88.7%, respectively. There was a statistically significant difference in visualisation rates of pericardial recesses between 2-slice MDCT and other MDCT systems (p<0.01). Age, and 4-, 16- and 64-slice MDCT versus 2-slice MDCT and the presence of pleural effusion appeared as significant predictors of the presence of any recess. Conclusions. Visualisation rates of pericardial recesses are higher with 4-, 16- and 64-slice MDCT than with 2-slice MDCT. Therefore, radiologists need to be familiar with the different appearances of pericardial recesses on MDCT to avoid misdiagnosis.Öğe Ultrasound as a diagnostic tool to differentiate acute from chronic renal failure(Dustri-Verlag Dr Karl Feistle, 2010) Ozmen, C. A.; Akin, D.; Bilek, S. U.; Bayrak, A. H.; Senturk, S.; Nazaroglu, H.Aim Renal ultrasound (US) is the most appropriate method for imaging renal failure; however, considerable overlap in renal size and renal echogenicity exists between normally and abnormally functioning kidneys We compared the sonographic features of kidneys in patients with renal failure to investigate the potential role of renal US to distinguish acute from chronic renal failure and assessed the diagnostic role of body surface area-corrected renal length compared to measured renal length Materials and methods We included 127 consecutive patients with serum creatinine levels higher than 3 mg/dl and 33 healthy volunteers The subjects with acute renal failure (ARF) and chronic renal failure (CRF) were compared for renal length, parenchymal thickness, parenchymal echogenicity, distinctness of the corticomedullary junction, and the presence of stones and cysts Results: No significant differences in age, serum albumin, creatinine, weight, height, or gender distribution were found between patients with ARF and those with CRF, except in serum hemoglobin. The flat and left kidney parenchymal thickness and renal length were significantly greater in ARF patients than in those with CRF (p < 0 0001). The mean parenchymal thickness and renal length were similar in ARF patients and the control group Grade I hyperechogenicity was the most common finding during sonography Conclusions Renal length, parenchymal thickness, and echogenicity differed significantly between patients with acute and chronic renal failure A renal US examination is still the most appropriate method for imaging renal failure and should be combined with other tests to distinguish acute from chronic renal failureÖğe An unusual bilateral mastitis in a postmenopausal woman caused by brucellosis(Acta Medical Belgica, 2007) Akay, H.; Girgin, S.; Ozmen, C. A.; Kilic, L.; Sakarya, H.Breast involvement of brucella can be frequently detected in animals, however, it is extremely rare in humans : Clinical findings and complications may cause difficulties in diagnosis. We report the case of a 52-year old woman with bilateral brucella mastitis, which is difficult to differentiate from inflammatory breast carcinoma.
