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Permanent URI for this collectionhttps://hdl.handle.net/11443/932

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Author: search.filters.author.Eken, AlperHas files: Yes

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    Bilateral recurrent external obturator muscle hematoma: An unusual cause of pelvic pain in hemophilia
    (SPANDIDOS PUBL LTD, 2016-01-01) Arpaci, Taner; Sasmaz, Ilgen; Akbas, Tugana; Eken, Alper; Ozgur, Anil; Antmen, Bulent
    Following joint hemorrhages, intramuscular hemorrhages are the second most prevalent bleeding pattern in hemophiliac patients. Hematomas of the iliopsoas muscle are a well-known complication of hemophilia
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    The role of RENAL, PADUA and C-index scoring systems in predicting the results of partial nephrectomy without ischemia
    (ELSEVIER SINGAPORE PTE LTD, 2019-01-01) Alma, Ergun; Ercil, Hakan; Eken, Alper; Deniz, Mehmet Eflatun; Tumer, Erbay; Oksuzler, Fatma Yasemin; Gurbuz, Zafer Gokhan
    Objective: To evaluate the feasibility and renoprotective effect of off-clamp partial nephrectomy (PN) by renal scoring systems. Methods: After approval of the local ethics committee, the radiological and clinical data of patients with renal masses who underwent PN between January 2012 and January 2017 were evaluated in two university hospitals. Total 132 patients who underwent open surgery and off-clamp technique were included. All patients underwent contrast-enhanced computed tomography (CT) or magnetic resonance imaging (MRI) preoperatively. Preoperative demographic data, estimated glomerular filtration rate (e-GFR) and hematocrit changes, operation time, tumor volume and hospitalization time from patients were evaluated separately and statistically for each of the three scoring systems. Results: Our study consisted of 132 patients with a mean age of 53.9 +/- 113.9 with 69 male and 63 female. Statistically significant difference between the risk groups in RENAL and PADUA scoring were found according to tumor T stage and tumor volume (p < 0.005). Statistically significant difference was only found between risk groups of RENAL scoring system in e-GFR reduction (p<0.05). There was no statistically significant difference between the groups in the complications of all three classification systems (p > 0.005). Conclusions: In our study, all three scoring sytem successfully predicted the surgical complexity ve surgical outcomes and our results indicate that off-clamp PN has similar success and complications rates when compared to the literature. The off-clamp PN must be kept in mind to maintain postoperative renal functions eligible patients. (C) 2018 Asian Surgical Association and Taiwan Robotic Surgery Association. Publishing services by Elsevier B.V.
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    Computed tomography based evaluation of prostatic fiducial marker migration between the periods of insertion and simulation
    (AVES, 2017-01-01) Arpaci, Taner; Ugurluer, Gamze; Ispir, Emine Burcin; Eken, Alper; Akbas, Tugana; Serin, Meltem
    Objective: The aim of this study was to determine whether significant fiducial marker migration occurs between the periods of prostatic marker insertion and computed tomography (CT) performed for radiotherapy planning and if a waiting period is necessary. Material and methods: Thirty-nine patients with prostate adenocarcinoma underwent fiducial marker insertion before radiotherapy between June 2013 and December 2015. Three markers were inserted by one radiologist under the guidance of transrectal ultrasonography. All patients underwent CT three hours after insertion to confirm the number and position of fiducial markers. Radiotherapy planning CT was performed on an average of 11 days (range 7-20) after insertion. CT images were imported into treatment planning system to analyze the position of fiducial markers. Point-based marker match algorithm was used to find the distance of marker migration. The mean and maximum distances between each fiducial markers were calculated. Results: The mean distance of migration was 1.029+/-0.42 mm (range 0.23-1.93 mm) and the maximum distance was 1.361+/-0.59 mm (range 0.25-2.74 mm). The distance of marker migration was not statistically significant for the groups organized according to the timing of marker insertion, prostate volume, patient age, prostate specific antigen level and Gleason score. Conclusion: According to our results significant fiducial marker migration did not occur during the interval between insertion and treatment planning CT. It should be taken into consideration that performing simulation on the same day as marker insertion might prevent increased cost and delayed radiation therapy by saving the patients from extra visits to the clinic.
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    Safety and efficacy of photoselective vaporization of the prostate using the 180-W GreenLight XPS laser system in patients taking oral anticoagulants
    (SAGE PUBLICATIONS LTD, 2018-01-01) Eken, Alper; Soyupak, Bulent
    Objective To evaluate the safety and efficacy of the 180-W GreenLight XPS laser system for the treatment of benign prostatic hyperplasia in patients taking oral anticoagulants. Methods All consecutive patients admitted for lower urinary tract symptoms associated with benign prostatic hyperplasia from November 2012 to October 2016 and who underwent photoselective vaporization of the prostate with the 180-W GreenLight XPS laser were included in the study. The perioperative outcomes examined were the operating time, laser time, energy usage, and duration of postoperative catheterization. Functional parameters (International Prostate Symptom Score, maximum urinary flow rate, and post-void residual urine volume), prostate volume, and serum prostate-specific antigen concentration were examined at baseline and 3 months. Perioperative complications, if any, were noted. Results All functional parameters (International Prostate Symptom Score, maximum urinary flow rate, and post-void residual urine volume) significantly improved from baseline to 3 months. A small number of patients experienced at least one minor adverse event. There was no difference in the rate of adverse events between patients who were and were not taking anticoagulants. Conclusions Photoselective vaporization with a 180-W laser is an efficacious and safe treatment for benign prostatic hyperplasia, even in patients taking anticoagulant medications.