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    Doppler evaluation of the thyroid in pediatric goiter
    (Wiley, 2004) Mahmutyazicioglu, K; Turgut, M
    Purpose. The aim of this study was to identify any changes in Doppler parameters in the thyroid arteries of pediatric patients with a clinical diagnosis of goiter living in an area where goiter is endemic. Patients and Methods. In this prospective study, 20 pediatric patients with simple endemic goiter and 20 age-matched healthy subjects underwent sonographic examination. The resistance index (131) and peak systolic velocity (PSV) on duplex sonography were measured from the inferior thyroid arteries, and the thyroid gland volume was recorded. Serum thyrotropin, free T3 hormone, and free T4 hormone levels were measured in both groups. Results. The mean thyroid volume ( standard deviation) was significantly higher in the patients than in the healthy subjects (7.2 +/- 1.4 ml versus 3.2 +/- 1.1 ml; p < 0.01). The mean RI values for the thyroid arteries were significantly lower in the patient than in the control group (0.58 versus 0.70, respectively; p < 0.05). The mean PSV of the thyroid arteries was significantly higher for the patients than for the healthy subjects (mean, 36.7 cm/second versus 18.3 cm/second, respectively; p < 0.05). There was no correlation between the Doppler parameters and any of the hormone levels evaluated. Conclusions. In the arteries supplying the thyroid gland in a pediatric population, Rls were lower and PSVs higher in the patients with diffuse goiter than in the healthy control group. We discuss iodine deficiency as a possible mechanism for these changes. (C) 2003 Wiley Periodicals, Inc.
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    Duplicate origin of left vertebral artery with thrombosis at the origin
    (Wiley, 1998) Mahmutyazicioglu, K; Saraç, K; Bölük, A; Kutlu, R
    We describe a rare case of vertebral artery duplication in a patient with vertigo, weakness, and nausea. A color Doppler examination revealed a duplicate origin of the left vertebral artery and a hyperechoic thrombus at the origin of 1 of the duplicated arteries. CT angiography of the lower neck area demonstrated duplicated vertebral arteries on the left side. MR angiography of the vertebrobasilar system did not show duplication, indicating that the duplicated vertebral arteries fused at a level higher than C2. (C) 1998 John Wiley & Sons, Inc.
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    Hemodynamic changes in the early phase of artificially created arteriovenous fistula: Color Doppler ultrasonographic findings
    (Amer Inst Ultrasound Medicine, 1997) Mahmutyazicioglu, K; Kesenci, M; Fitoz, S; Buyukberber, S; Sencan, O; Erden, I
    The objective of this study was to evaluate hemodynamic variables in arteriovenous fistulas by color Doppler ultrasonography. This study involved 28 patients with chronic renal failure who were sent to surgery clinic for creation of an arteriovenous fistula of the Brescia-Cimino type. Patients were evaluated preoperatively and on the first and seventh days postoperatively by a color Doppler ultrasound machine with a 7.5 MHz linear probe. The distal radial artery was examined preoperatively and the fistula itself postoperatively. Changes in the fistula size and the velocity, volume, and resistive index of the distal radial artery were recorded. Postoperatively the radial artery diameter, systolic flow rates, and volume flow had increased significantly, especially on the first day, in comparison to preoperative values. Resistive index values has deceased significantly at both the first and the seventh days postoperatively. Color Doppler ultrasonography is a very effective method in the evaluation of hemodynamics of arteriovenous fistulas in hemodialysis patients. It will allow an understanding of the pathology in nonfunctioning fistulas or of the cause of complications that develop secondarily.
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    Ileus secondary to pancreatic pseudocyst
    (Elsevier Science Inc, 1998) Büyükberber, S; Mahmutyazicioglu, K; Ertas, E; Sencan, O; Sahin, M; Orakçi, V
    Intra- or extrapancreatic pseudocyst is a common local complication in pancreatitis. Pathological involvement of the colon secondary to acute and chronic pancreatitis is a rare complication of major clinical interest. Contiguity with the tail of the pancreas and certain anatomical relationships, particularly at the level of the peritoneal reflections, explain the involvement of, particularly, the left flexure of the colon and the adjacent part of the transverse colon. We report a patient, presenting with ileus resulting from pressure of a giant pseudocyst secondary to acute pancreatitis, to share the diagnostic and chronologic follow-up computed tomography (CT) scanning findings of this rare complication. (C) Elsevier Science Inc., 1998.