Burak Özkan
Istanbul University
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Featured researches published by Burak Özkan.
The Journal of Urology | 2002
Can Öbek; Bulent Onal; Burak Özkan; Ali Ulvi Önder; Veli Yalcin; Vural Solok
PURPOSE Periprostatic local anesthesia for prostate biopsy requires 2 or more extra needle punctures and injection of the local anesthetic through the highly colonized rectum. To our knowledge we report the first prospective randomized trial to assess the infectious or hemorrhagic complications associated with this method. MATERIALS AND METHODS A total of 100 consecutive patients with sterile urine cultures underwent transrectal ultrasound guided prostate biopsy. They were randomized to receive a periprostatic nerve block or no anesthesia. Patients were evaluated for the amount of rectal and urethral bleeding, and symptoms and signs of infection after biopsy. RESULTS The amount of urethral bleeding was slight and similar in the 2 groups. Rectal bleeding was significantly less in the patients who received anesthesia. High fever (greater than 37.8C) was more frequent in the nerve block group and 2 patients in this group required rehospitalization. Bacteriuria in post-biopsy urine cultures was significantly more common in the anesthesia group. CONCLUSIONS Our results suggest that periprostatic local anesthesia for prostate biopsy does not increase the risk of urethral bleeding. It is associated with a decreased incidence of rectal bleeding, presumably due to decreased patient discomfort. The incidence of bacteriuria was significantly higher in the anesthesia group. High fever and hospitalization due to infectious complications were also more common in the local anesthesia group, although not statistically significant. Prospective randomized trials seem warranted to determine the optimum antibiotic prophylaxis regimen in patients undergoing biopsy with a periprostatic nerve block.
International Urology and Nephrology | 2007
Oktay Demirkesen; Burcin Tunc; Burak Özkan
A 49-year-old woman was admitted to our clinic with high fever, left lumbar pain and a mass at the flank following spinal surgery for disk disease. Complete left ureteral avulsion with urinoma formation was detected and she was treated with ureteroureterostomy. As in this case shows that the possibility of ureteral injury to the ureter during surgery for a disk hernia should be familiar to all neurosurgeons, orthopedic surgeons and urologists. When the diagnosis is made during early postoperative period, good results with preservation of the kidney can be achieved.
International Urology and Nephrology | 2007
Hamdi Özkara; Burak Özkan; Vural Solok
Current management strategies of renal angiomyolipomas (AMLs) include observation, embolization and partial or total nephrectomy. Selective arterial embolization is an effective and safe treatment of large angiomyolipomas with low complication rates. Percutaneous drainage was the recommended treatment for renal abscess formation following the embolization. Herein we describe two cases which we performed percutaneous drainage of the liquefaction of entire tumors after embolization. Open surgery was needed for one of the patients who showed recurrence after percutaneous drainage and alcohol irrigation of the cavity, whereas percutaneous drainage was the sufficient treatment for the other patient as recommended.
International Urology and Nephrology | 2006
Burak Özkan; Mustafa Ozguroglu; Hamdi Özkara; Haydar Durak; Zübeyr Talat
A case of 70 years old man with a slowly enlarging painful scrotal mass is herein reported. Computed tomography scan of the scrotum showed a homogenous and encapsulated mass, associated with the tunica albuginea. There was no evidence of any metastatic lesion(s). Orchidectomy was performed with high ligation of the spermatic cord. Histopathologic examination revealed a rare case of paratesticular myxofibrosarcoma. Complete surgical resection is the only curative treatment modality in the treatment of these low grade tumors. Adjuvant chemotherapy or radiotherapy are not recommended for paratesticular myxofibrosarcomas.
Urologia Internationalis | 2006
Can Öbek; Burak Özkan; Burcin Tunc; Günay Can
Introduction: The most efficacious and commonly applied anesthetic technique for prostate biopsy is periprostatic block. In a previous publication, the creation of a ‘hypoechoic space’ at the injection site was described. This was reported to be a routine and essential part of the technique in various subsequent series. We were interested in assessing the incidence of the formation of such a hypoechoic area, and more importantly, whether it had any impact on pain management. Materials and Methods: One hundred and eleven consecutive patients were prospectively evaluated. Local anesthetic consisted of 2.5 ml of 2% lidocaine for each side of the prostate. Infiltration was done within the neurovascular space at the base of the prostate just lateral to the junction between the prostate and the seminal vesicle. The creation of a hypoechoic nodule was recorded in three categories: no formation, unilateral or bilateral formation. Three groups were compared regarding the intensity of pain using a numeric analog scale. Results: No hypoechoic area was formed in 30 (27%) patients. A unilateral nodule was created in 40 (36%), and a bilateral nodule was seen in 41 (37%) patients. The median pain scores were 3.3, 2.5 and 1.3 for the no hypoechoic wheal, unilateral and bilateral wheal groups, respectively (p < 0.0001). Conclusion: Our results suggest that the creation of a hypoechoic space with anesthetic infiltration for prostate biopsy is indeed an important aspect of the technique with regard to pain control; however, it may not be accomplished in every case.
Case Reports in Medicine | 2012
Enis Rauf Coskuner; Burak Özkan; Veli Yalcin
Angiomyolipoma is a benign neoplasm composed of varying admixtures of blood vessels, smooth muscle cells, and adipose tissue. Because of an increased risk of spontaneous haemorrhage, surgical approach is needed greater than 4–8 cm size. We here report our partial nephrectomy experience in the 24 cm size giant angiomyolipoma. 26-year-old woman referred to our clinic with a 24 cm size angiomyolipoma in her lower pole of right kidney. The inferior vena cava was deviated to the left by the mass. All the blood tests were normal and we offered her the choices of partial nephrectomy or nephrectomy. Right subcostal approach was used. The patient underwent resection of the mass with a safety region of 1 cm. Frozen section evaluation was consistent with angiomyolipoma and free for surgical margin. Warm ischemia time was 35 min. and intraoperative bleeding volume was 200 cc. Postoperative 2nd day the drain was taken and hospital stay was 4 days. In literature we observed very rare angiomyolipoma cases with such a large dimension treated by partial nephrectomy without arterial embolization. If technically suitable partial nephrectomy is the main chioce in this kind of benign lesions in young patients.
Urologia Internationalis | 2007
Ali Riza Kural; Oktay Demirkesen; Bulent Alici; Can Öbek; Burcin Tunc; Burak Özkan
A 50-year-old man with hemophilia A presented with recurrent hematuria due to renal stone disease. He was receiving approximately 50,000 units of recombinant factor (rF) VIII concentrate every year due to hematuria. Between 1996 and 2002, his serum creatinine level increased from 0.7 to 1.2 ng/ml. In an effort to resolve the problems of excessive blood loss with transfusions, recurrent rF VIII replacements and deteriorating renal function, he was offered treatment with percutaneous nephrolithotomy (PNL) in conjunction with rF VIII administration. He underwent left PNL for left staghorn calculi in November 2002 with administration of 52,000 units rF VIII, and another PNL for the right kidney in April 2004 with the administration of 90,500 units rF VIII. A pneumatic lithotriptor was used in both operations. The serum creatinine level was 0.8 ng/ml upon completion of treatment and the patient was symptom and stone free at 10-month follow-up. He has not suffered from hematuria since that time. We conclude that bleeding disorders may not be a contraindication for PNL if corrected and monitored appropriately.
Sexual medicine reviews | 2018
Enis Rauf Coskuner; Mehmet Gokhan Culha; Burak Özkan; Elcin Orhan Kaleagasi
INTRODUCTION Selective serotonin reuptake inhibitors (SSRIs) are a widely used class of drug for various psychiatric disorders during the lifespan, including pregnancy, lactation, childhood, and adolescence. Deterioration in sexual functioning is a major and serious adverse effect of SSRIs. There is emerging evidence that SSRIs can have long-lasting effects on sexuality. AIM To summarize the long-lasting effects of SSRIs on sexuality, starting with animal models and continuing with the clinical experience of different investigators. METHOD A literature review of relevant publications in PubMed. MAIN OUTCOME MEASURES To assess the long-lasting effects of SSRIs on sexuality. RESULTS Although the persistent effects of SSRIs on sexuality have been little studied in humans, animal studies suggest that SSRIs might cause permanent sexual dysfunction after ending SSRI exposure at a young age but not in adulthood in rats. There are no prospective randomized controlled trials in humans and the present evidence is derived from case reports, incidental research findings, and experiences of some internet communities. CONCLUSION There is some preclinical evidence from animal studies for enduring SSRI-induced sexual dysfunction, but the available clinical information could prevent a clear decision about the existence of post-SSRI sexual dysfunction, its pathophysiology, and its management. We need more research to fill in the gaps in our knowledge. Coskuner ER, Culha MG, Ozkan B, Kaleagasi EO. Post-SSRI Sexual Dysfunction: Preclinical to Clinical. Is It Fact or Fiction? Sex Med Rev 2018;6:217-223.
Türk Üroloji Dergisi/Turkish Journal of Urology | 2016
Burak Özkan; Enis Rauf Coskuner; Veli Yalcin
OBJECTIVE To share our results of robotic assisted partial nephrectomy (RAPN) we performed without using ureteral stent in a single center from Turkey. MATERIAL AND METHODS Medical records of consecutive 45 patients (34 men and 11 women) who underwent RAPN for kidney lesions between March 2011 and December 2014 were retrieved, and evaluated. All the procedures were performed by a transperitoneal approach without using ureteral stent prior to surgery. Renal artery clamping was used in all cases and intraoperative ultrasonography was used in 2 cases. RESULTS Patients undergoing RAPN had a mean tumor size of 4.42 cm (2-8) and a mean renal nephrometry score of 5.82 (4-11). The mean estimated blood loss was 250 mL (150-450 ml) and the mean operative time was 195 minutes (150-300). There was no statistical difference between the preoperative and postoperative serum creatinine levels at the first follow-up visit (0.9 vs. 0.95, p=0.087). Surgical margin positivity was not detected in any patient, and the mean surgical margin distance was calculated as 0.4 mm (0.2-10). In only 1 patient disease recurrence was detected at the 21(st) month of the the follow-up period, and no distant metastases was reported in our patients at a mean follow-up of 10 months (3-36 mos). Our complication rate was 11.1% and according to the Clavien system complications were as; grade 2 (3 patients), grade 3a (1 patient) and grade 3b (1 patient). CONCLUSION With appropriately selected patients and adequate surgical experience, RAPN performed without using ureteral stent is a safe and feasible method for localized renal tumors.
Central European Journal of Urology 1\/2010 | 2015
Burak Özkan; Cagatay Dogan; Gulce Ecem Can; Nejat Tansu; Ahmet Erozenci; Bulent Onal
Introduction The aim of our study was to determine the efficacy of ureteral stents for extracorporeal shock wave lithotripsy (SWL) treatment of pelvis renalis stones and to compare the results and complications in stented and non-stented patients. Material and methods Between 1995 and 2011, 1361 patients with pelvis renalis stones were treated with SWL. Patients were subdivided into three groups according to stone burden: ≤1 cm2 (group 1; n = 514), 1.1 to 2 cm2 (group 2; n = 530) and >2 cm2 (group 3; n = 317). Each group was divided into subgroups of patients who did and did not undergo ureteral stent implantation before SWL treatment. The efficacy of treatment was evaluated by determining the effectiveness quotient (EQ). Statistical analysis was performed by chi-square, Fishers exact and Mann-Whitney U tests. Results Of the 514, 530 and 317 patients in groups 1, 2 and 3 respectively, 30 (6%), 44 (8%) and 104 (33%) patients underwent auxiliary stent implantation. Steinstrasse rates did not differ significantly between stented and non-stented patients in each group. The EQ was calculated as 62%, 33% and 70% respectively in non-stented, stented and totally for group 1. This ratio calculated as 58%, 25% and 63% for group 2 and 62%, 26% and 47% for group 3. Stone-free rates were significantly higher for non-stented than for stented patients in groups 2 and 3. Conclusions Stone free rates are significantly higher in non-stented than in stented patients with pelvis renalis stones >1 cm2, whereas steinstrasse rates are not affected.