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KALKAN, SENAD

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SENAD
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KALKAN
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Now showing 1 - 9 of 9
  • PublicationMetadata only
    Long term results of augmentation cystoplasty and urinary diversion in multiple sclerosis
    (2019-06-01T00:00:00Z) KALKAN, Senad; Jaffe, William I.; Simma-Chiang, Vannita; Li, Eric S. W.; Blaivas, Jerry G.; KALKAN, SENAD
    Introduction: There is a paucity of data about augmentation cystoplasty (AC) in multiple sclerosis (MS) patients with refractory lower urinary tract symptoms (LUTS). The aim of this study is to evaluate the long term outcomes and morbidity of these procedures in MS patients.
  • PublicationOpen Access
    High D-dimer levels are associated with prostate cancer
    (2020-05-01T00:00:00Z) KALKAN, Senad; Caliskan, Selahattin; KALKAN, SENAD
    Prostate cancer is one of the most common types of cancer among men in the world1 and a significant health problem in developed and developing countries2 . The association between cancer and hemostasis has been shown in several studies3 . The main risk factors for coagulation activation and thrombosis are aging and malignancy4 . The increased risk of thrombosis in cancer patients may be associated with high levels of coagulation markers (fibrinogen), and thrombogenesis markers (D-dimer) are likely evidence of this process5 . Fibrinogen is an acute-phase protein that is mainly synthesized by hepatocytes and converted into insoluble fibrin by activated thrombin. It is also an important indicator of the coagulation system6 . The plasma fibrinogen level increases in some circumstances, such as malignancy and systemic inflammation. D-dimer is a degradation product of fibrin which is produced by plasmin-induced fibrinolytic activity7 . It is a biomarker that indicates the activation of hemostasis and fibrinolysis. Elevated plasma levels may be associated with some scenarios such as cancer, pregnancy, infectious diseases, trauma, surgery, and venous thromboembolism. When fibrinogen levels are increased, they are deemed to be an unfavorable prognostic factor in some malignancies, such as those of the digestive system, gynecologic malignancies, urologic neoplasms, and soft tissue sarcomas6 . A high level of D-dimer is a prognostic factor associated with increased mortality risk in patients with brain tumors, lymphomas, breast, lung, stomach, colorectal, pancreatic, and prostate cancers7 . We investigated the levels of D-dimer and fibrinogen in patients with prostate cancer and benign prostate hyperplasia.
  • PublicationOpen Access
    Mesh related vesico-peritoneal fistula presenting with urinary ascites: A case report
    (2019-03-01T00:00:00Z) İLKTAÇ, ABDULLAH; ERSÖZ, CEVPER; DOĞAN, BAYRAM; KALKAN, Senad; İLKTAÇ, ABDULLAH; ERSÖZ, CEVPER; DOĞAN, BAYRAM; KALKAN, SENAD
    Vesicoperitoneal fistula is a very rare entity of epithelialized communication between peritoneal cavity and bladder.1 It results in accumulation of urine in peritoneal cavity and causes elevated urea and creatinine levels mimicking acute renal failure. Incisional hernia is common complication of abdominal surgery and often repaired with non-absorbable mesh.2 Using dual mesh can reduce mesh related complications but migration to adjacent organs can still happen and cause severe complications. Here we present a case of mesh related vesico-peritoneal fistula presenting with urinary ascites 2 years after incisional hernia repair.
  • PublicationOpen Access
    Comparison of Scoring Systems in Predicting Success of Percutaneous Nephrolithotomy
    (2019-01-01T00:00:00Z) AKÇAY, MUZAFFER; Tosun, Muhammed; GEVHER, FATİH; KALKAN, Senad; ERSÖZ, CEVPER; Kayali, Yunus; Tepeler, Abdulkadir; AKÇAY, MUZAFFER; TOSUN, MUHAMMED; GEVHER, FATİH; KALKAN, SENAD; ERSÖZ, CEVPER; KAYALI, YUNUS
    Background: Scoring systems are useful to inform the patients about the success and complication rates of the operation prior the surgery. Aims: To determine the applicability of the popular scoring systems (Guy’s, stone size, tract length, obstruction, number of involved calices, and essence/stone density and Clinical Research Office of the Endourological Society) by means of examining preoperative data of patients treated with percutaneous nephrolithotomy. Study Design: Cross sectional study. Methods: We retrospectively reviewed files of the patients who had undergone percutaneous nephrolithotomy in our center between 2011 and 2015. Excluded from the study were patients aged <18 years, and those who were not assessed preoperatively with computed tomography. Preoperative computed tomography images of all patients were assessed by a single observer, and patients were graded based on three scoring system. Demographic data were analyzed along with perioperative data (operation, fluoroscopy, length of hospital stay, changes in hematocrit values, location, and number of access sites, stone-free and complication rates). Results: A total of 298 patients who had been treated with 300 procedures were enrolled into the study. Mean age, stone burden, number of stones, and density were 48.1±12.9 years, 663.5±442.8 mm2, 1.8±1.1 and 888.3±273 HU respectively. Scores of the cases based on Guy’s, stone size, tract length, obstruction, number of involved calices, and essence/stone density, and Clinical Research Office of the Endourological Society scoring system were calculated as 2, 7.6, and 222.1 points respectively. 81.6% of the patients were stonefree. Complications were detected in 30 (9.9%) patients. Based on receiver operating characteristic curve analysis a positive correlation was detected between success rate and scoring systems, i.e., Guy’s (p=<0.001, r=-0.309), stone size, tract length, obstruction, number of involved calices, and essence/stone density (p=<0.001, r=-0.295), and Clinical Research Office of the Endourological Society (p=<0.001, r=0.426). The Clinical Research Office of the Endourological Society scoring system had the highest predictive value. The sensitivity rates rates for Guy’s, Clinical Research Office of the Endourological Society and Stone scoring system were as 78.78%, 80% and 82.34% respectively. Conclusion: All of scoring systems predicted correctly the success of the percutaneous nephrolithotomy procedures. The Clinical Research Office of the Endourological Society scoring system had the highest predictive value. Keywords: Percutaneous nephrolitotomy, scoring methods, specificity and sensitivity, urinary calculi
  • PublicationMetadata only
    Surgery for Stress Urinary Incontinence Autologous Fascial Sling
    (2019-02-01T00:00:00Z) Blaivas, Jerry G.; Simma-Chiang, Vannita; Gul, Zeynep; Dayan, Linda; KALKAN, Senad; Daniel, Melissa; KALKAN, SENAD
    This article describes the operative technique of autologous fascial pubovaginal sling (AFPVS) surgery, examines the senior author-s outcomes with AFPVS, compares these outcomes with those of other large studies and meta-analyses, and compares the safety and efficacy of AFPVS with those of the synthetic midurethral sling (SMUS). Recently, the SMUS has become the treatment of choice for most surgeons. The efficacy of the SMUS remains unchallenged and comparable with that of AFPVS, but SMUS are associated with more severe complications. In the author-s opinion, the AFPVS should remain the gold standard for treating SUI.
  • PublicationOpen Access
    Reduced Radiation Fluoroscopy Protocol during Retrograde Intrarenal Surgery for the Treatment of Kidney Stones
    (2014-05-01T00:00:00Z) Kirac, Mustafa; Tepeler, Abdulkadir; Guneri, Cagri; KALKAN, Senad; Kardas, Sina; Armagan, Abdullah; Biri, Hasan; KALKAN, SENAD; KARDAŞ, SİNA
    Purpose: To discuss whether fluoroscopic imaging is essential during the ureteroscopic treatment of kidney stones in an effort to diminish radiation exposure. Materials and methods: Seventy-six patients with kidney stones were treated with retrograde intrarenal surgery (RIRS). In the operation room, a mobile C-arm fluoroscopy system was ready to use in case fluoroscopic imaging was needed. The manipulations were performed with tactile and visual cues. The perioperative and postoperative parameters were retrospectively evaluated. Results: The mean age of the patients was 39.9 ± 13.8 years. The mean stone size was 14.1 ± 4.1 mm. The insertion of the access sheath was performed over the guidewire under single shoot fluoroscopic imaging in all patients. Additional fluoroscopic imaging was required to localize the stone (n = 2) and to determine the collecting system anatomy (n = 2) for 4 (5.2%) patients with previous renal surgery and severe hydronephrosis. Stone-free status was accomplished in 63 (82.9%) patients. Conclusion: The RIRS with low-dose fluoroscopy protocol for kidney stones can be safely and effectively performed in patients with no special circumstances such as anatomical abnormalities or calyceal diverticular stones.
  • PublicationMetadata only
    Fluoroless ureteroscopy: in whom and when?
    (2015-10-01T00:00:00Z) Kocaaslan, Ramazan; Tok, Adem; KALKAN, Senad; Tasci, Ali Ihsan; KALKAN, SENAD
  • PublicationOpen Access
    Association of intrinsic sphincter deficiency with urine flow acceleration measurement
    (2020-09-01T00:00:00Z) GÖKMEN KARASU, AYŞE FİLİZ; Aydin, Serdar; KALKAN, Senad; ERSÖZ, CEVPER; GÖKMEN KARASU, AYŞE FİLİZ; KALKAN, SENAD; ERSÖZ, CEVPER
    Background Intrinsic sphincter deficiency (ISD) is associated with an inability to maintain mucosal coaptation either at rest or in the presence of stress resulting from damage to muscles or nerves that maintain tonus. The purpose of our trial was to determine the role of urodynamic measurements of flow such as maximum flow rate, flow time, and acceleration speed of flow to assess the urethral resistance on prediction of stress incontinence and ISD. Materials and Methods Our study was based on a retrospective analysis of urodynamic records of female patients performed for urinary incontinence. Mean flow rate, maximum flow rate, detrusor pressure at maximum flow, vesical pressure at maximum flow, maximum detrusor pressure, and flow rate at maximum detrusor pressure measurements were extracted from the voiding phase of urodynamic charts. The slope of the maximum flow was used to calculate acceleration of flow (Qacc). The urodynamic records of 142 women were reviewed and Qacc was measured. Results The mean age of the ISD group was 53.3 +/- 12.5 (24-78) and of the non-ISD group 53.7 +/- 12.5 (35-74). The mean Qacc (30.3 +/- 16.1 degrees [mL/s(2)]) in the ISD group was significantly higher than in the non-ISD group (21.6 +/- 9.6 degrees [mL/s(2)]). Urodynamic bladder capacity of the non-ISD group (432.3 +/- 90.4 mL) was higher than the ISD group (389.2 +/- 109) (P = .01). Conclusion The Valsalva leak point pressure and maximum urethral closure pressure measurements in assessing urethral function are not useful for predicting incontinence surgery failure. We demonstrated that Qacc is higher in ISD stress incontinent women than stress incontinent women. Qacc may demonstrate urethral resistance and tonus in a more reliable manner.
  • PublicationOpen Access
    Removal of a retroperitoneal foreign body through single port laparoscopy using nephroscope
    (2017-09-01T00:00:00Z) Basibuyuk, Ismail; Tosun, Muhammed; KALKAN, Senad; Tepeler, Abdulkadir; TOSUN, MUHAMMED; KALKAN, SENAD
    Foreign bodies are rare and challenging issues leading to symptoms according to the location. Laparoscopy is a popular and minimally invasive method used for removal of foreign bodies in the abdominal cavity or retroperitoneum. We herein report a case with retroperitoneal foreign body that was removed through retroperitoneal single- port laparoscopy using nephroscope. To our knowledge this is the first case of removal of a retroperitoneal foreign body through single- port laparoscopy using nephroscope.