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ÇİÇEK, MEHMET ÇAĞATAY

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ÇİÇEK

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MEHMET ÇAĞATAY

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  • Publication
    The effects of laparoscopic urologic surgery on cardiac functions: A pulse wave velocity study
    (Aves, 2020-07-01) Çiçek, Mehmet Çağatay; Kaynak, Yurdaer; Gunseren, Kadir Ömur; Kaygısız, Onur; Vuruşkan, Hakan; ÇİÇEK, MEHMET ÇAĞATAY; GÜNSEREN, KADİR ÖMÜR; KAYGISIZ, ONUR; VURUŞKAN, HAKAN; Tıp Fakültesi; Üroloji Ana Bilim Dalı; 0000-0002-0471-5404; 0000-0001-8673-3093; 0000-0002-9790-7295; ABC-9924-2020; L-9439-2019; HGM-5995-2022 ; EFH-9523-2022
    Objective: The aim of this study is to evaluate the effects of laparoscopic urologic surgery on cardiac functions by the parameter pulse wave velocity (PWV), a noninvasive method.Material and methods: Between July 2012 and February 2013, a total of 47 patients were included in this prospective controlled study. Patients who have been scheduled for laparoscopic surgery (LS) (n=30) and open surgery (n=17) were enrolled in the study. Preoperative, perioperative, and postoperative cardiovascular parameters were measured by a PWV instrument, and the results were compared between laparoscopic (L) group and open (C) group.Results: In the L group, compared to preoperative values, perioperative systolic arterial pressure, diastolic arterial pressure, and mean arterial pressure increased considerably, by 2.6%, 7.9%, and 4.7%, respectively. This was in contrary to reductions in these parameters by 9.5%, 5.7%, and 10%, respectively, in the C group. For the I. group, cardiac output (CO) and cardiac index (CI) were increased in the perioperative period and decreased in the postoperative period. For the C group, there were no changes in measurements of perioperative and postoperative CO and CI. However, these changes in CO and CI were not significantly different between the L and C groups. Postoperative large artery elasticity index decreased in both groups. However, these changes did not represent significant difference between groups.Conclusion: Compared to open surgery, LS may cause increases in perioperative blood pressures. In addition, increased blood pressures may last even on the first postoperative day. These effects may be more important for patients with high cardiovascular risk.
  • Publication
    Investigation of the tissue allele distribution of the deceased kidney donors between 2007 and 2017.
    (Lippincott Williams & Wilkins, 2019-11-01) Oflaz, Rafet; Elgin, Ersin; Yıldız, Abdülmecid; Oruç, Ayşegül; Akgür, Suat; Ünsal, Oktay; Karaca, Mert; Ersoy, Sahriye; Selimoğlu, Kerem; Arslan, İlknur; Karan, Elif; Çiçek, Mehmet Çağatay; Günseren, Kadir Ömür; Güllülü, Sümmeyye; Vuruşkan, Hakan; Oflaz, Rafet; Elgin, Ersin; Yıldız, Abdülmecid; ORUÇ, AYŞEGÜL; AKGÜR, SUAT; Ünsal, Oktay; KARACA, MERT; Ersoy, Sahriye; Selimoğlu, Kerem; Arslan, İlknur; Karan, Elif; ÇİÇEK, MEHMET ÇAĞATAY; GÜNSEREN, KADİR ÖMÜR; GÜLLÜLÜ, NAZMİYE SÜMEYYE; VURUŞKAN, HAKAN; Tıp Fakültesi; Organ Nakli Merkezi; 0000-0002-9509-5799; 0000-0002-0342-9692; 0000-0003-3635-7282; 0000-0002-3454-8483; 0000-0002-0471-5404; 0000-0001-6711-676X; AAG-7406-2021; AAH-4002-2021; DJU-5362-2022; DXA-2790-2022; EIF-8983-2022; JIX-1144-2023; JJY-8484-2023; AAG-7406-2021; EVS-9805-2022; CDS-3299-2022; CCH-8947-2022; FDB-4488-2022; HGM-5995-2022; EFH-9523-2022; CST-9838-2022; ITO-9188-2023
  • Publication
    Pediatric multilocular cystic nephroma extending into the renal pelvis and ureter
    (Galenos Yayıncılık, 2014-11-01) Doğan, Hasan Serkan; Yazıcı, Zeynep; Aytac, Berna; Sevinir, Betül; Erdoğan, Hakan; Çiçek, Çağatay; YAZICI, ZEYNEP; AYTAÇ VURUŞKAN, BERNA; SEVİNİR, BETÜL BERRİN; ÇİÇEK, MEHMET ÇAĞATAY; Tıp Fakültesi; Üroloji Ana Bilim Dalı; AAH-1570-2021; AAI-2303-2021; AAH-9746-2021; JLG-1312-2023
    Multilocular cystic nephroma (MCN) is a rare tumor at the most benign end of the spectrum of the multilocular cystic neplasms of kidney. Nephrectomy is curative for MCN. In this case-report, we present a 16-month-old girl with a 10x15 cm multilocular cystic renal tumor extending into the renal pelvis and proximal ureter on the right side demonstrated on magnetic resonance imaging. Nephrectomy was performed. The pathology was completely consistent with MCN.
  • Publication
    Monocyte-to-high-density lipoprotein cholesterol ratio is independently associated with all-cause mortality in deceased donor kidney transplant recipients
    (Başkent Üniversitesi, 2021-10-01) Çiçek, Mehmet Çagatay; Günseren, Kadir Omur; Aydın, Yavuz Mert; Yıldız, Abdulmecit; Elgin, Ersin; Ersoy, Alparslan; ÇİÇEK, MEHMET ÇAĞATAY; GÜNSEREN, KADİR ÖMÜR; AYDIN, YAVUZ MERT; YILDIZ, ABDULMECİT; Elgin, Ersin; ERSOY, ALPARSLAN; Tıp Fakültesi; Transplantasyon Bölümü; 0000-0002-0471-5404; 0000-0001-8673-3093; 0000-0002-6287-6767; 0000-0002-9509-5799; ABC-9924-2020; AFP-3055-2022; HGM-5995-2022; HIG-9032-2022; DXA-2790-2022; CPX-5894-2022
    Objectives: The primary objective of this study was to evaluate the impact of monocyte-to-high-density lipoprotein cholesterol ratio on all-cause mortality in deceased donor kidney transplant recipients. Materials and Methods: This was a retrospective observational study in which all deceased donor kidney transplant recipients were included. Relevant data for analyses included clinical and demographic features, laboratory values, number of HLA matches, occurrence of delayed graft function, cold ischemia time, and survival status. Kaplan-Meier survival analysis and Cox proportional hazards analysis were performed to determine the effects of monocyte-tohigh-density lipoprotein cholesterol ratio on all-cause mortality. Results: Our study included 325 deceased donor kidney transplant recipients (43.1% females, mean age of 44.5 +/- 11.2 years). Median value of monocyte-tohigh-density lipoprotein cholesterol ratio was 14.0 (interquartile range, 9.94-21.03). The total median observation time was 227 weeks (range, 115-345 weeks). Twenty deaths (12.3%) occurred during the follow-up period in recipients with monocyte-to-highdensity lipoprotein cholesterol ratio below median value, whereas 47 deaths (29%) occurred in recipients with ratio above the median (P < .001). Log-rank test showed significantly higher mortality in the group with monocyte-to high density lipoprotein cholesterol ratio higher than median (P = .001). In the multivariate Cox model, delayed graft function, duration of dialysis, cold ischemia time, and monocyte-to-high-density lipoprotein cholesterol ratio group appeared as independent predictors of all-cause mortality. Conclusions: Monocyte-to-high-density lipoprotein cholesterol ratio before kidney transplant seems to affect survival independently in deceased donor kidney transplant recipients.
  • Publication
    Comparison of laparoscopic pyelolithotomy and retrograde intrarenal surgery in the management of large renal pelvic stones
    (Wiley, 2021-03-02) Çiçek, Mehmet Çağatay; Asi, Tariq; Günseren, Kadir Ömür; Kılıçarslan, Hakan; ÇİÇEK, MEHMET ÇAĞATAY; GÜNSEREN, KADİR ÖMÜR; KILIÇARSLAN, HAKAN; Tıp Fakültesi; Üroloji Ana Bilim Dalı; 0000-0002-0471-5404; 0000-0001-8673-3093; ABC-9924-2020; HGM-5995-2022; FGY-3115-2022
    Background To compare the clinical outcomes of laparoscopic pyelolithotomy (LP) and retrograde intrarenal surgery (RIRS) in the management of large renal pelvic stones.Patients and methods This study included patients who presented with a single renal pelvic stone sized >= 20 mm and who were treated primarily by LP or RIRS. The patients were grouped based on the surgical procedure they underwent. We retrospectively examined and compared the age, the longest axis, and the surface area of the stone, operation time, hospitalization time, complications, and stone-free rates of the two groups.Results Of the 156 patients included in the study, 44 had LP, and 112 had RIRS. Patients who received LP (13 males, 31 females) had a median age of 54 (18-79) years, while those who underwent RIRS (46 males, 66 females) had a median age of 54.5 (18-79). Patients who received LP were found to have larger median stone size (30 mm vs 24 mm, P = .003), longer operation time (100 minutes vs 70 minutes, P = .007), lower complication rate (2% vs 8.9%, P = .063), longer median hospital stay (3 days vs 1 day, P < .001) and better stone-free rate at the third month (90.9% vs 67.9%, P < .001).Conclusion LP is a safe and efficient procedure that could be used as an alternative to RIRS in managing large renal pelvic stones.
  • Publication
    The predictive factors that total laser energy consumed during retrograde intrarenal surgery (RIRS): stone area and density
    (Springer London Ltd, 2023-05-26) Kaygısız, Onur; Aydın, Yavuz Mert; Çiçek, Mehmet Çağatay; Polat, Rıdvan; Coşkun, Burhan; Ocakoğlu, Gökhan; Kılıçarslan, Hakan; KAYGISIZ, ONUR; AYDIN, YAVUZ MERT; ÇİÇEK, MEHMET ÇAĞATAY; POLAT, RIDVAN; COŞKUN, BURHAN; OCAKOĞLU, GÖKHAN; KILIÇARSLAN, HAKAN; Tıp Fakültesi; Üroloji Ana Bilim Dalı; 0000-0002-9790-7295; 0000-0002-6287-6767; 0000-0002-0471-5404; 0000-0003-0261-3671; 0000-0002-8242-9921; 0000-0002-1114-6051; AFP-3055-2022; AAH-5180-2021; L-9439-2019; JCO-5169-2023; AAH-9704-2021; HGM-5995-2022; JIT-9412-2023
    Holmium: YAG (Ho: YAG) laser lithotripsy with flexible ureterorenoscopy can be used with high stone-free and low complication rates for renal stones. This study aimed to determine the factors affecting the total laser energy in cases with provided stone-free status after a single session of retrograde intrarenal surgery (RIRS). Data of 222 patients who underwent RIRS between October 2017 and March 2020 were evaluated retrospectively. After exclusion criteria, the study was carried out with 184 stone-free cases. All cases were performed without using a ureteral access sheath (UAS), and dusting was preferred as the lithotripsy method. The effects of age, gender, body mass index (BMI), previous RIRS history, previous shock wave lithotripsy (SWL) history, stone localization, number of stones, stone surface area, and stone density on total laser energy were analyzed. There was no significant correlation between total laser energy with gender, BMI, previous RIRS history, previous SWL history, stone localization, and the number of stones (p:0.347, p:0.482, p:0.119, p:0.167, p:0.907, p:0.933 respectively). There was a significant correlation between age and total laser energy (p = 0.032), but it was not observed when the effect of the stone surface area was removed (p = 0.354). There were significant correlations between total laser energy and stone surface area, stone density, and total laser time (p<0.001, p<0.001, and p <0.001, respectively). Stone area and stone density affect the total energy consumed during laser lithotripsy. Urologists should consider the stone area, stone density, and the power of the laser device to determine which surgical technic to prefer.
  • Publication
    A cut-off value for the operation time and other risk factors in terms of the infection risk for flexible ureterorenoscopy
    (Wiley, 2020-12-01) Demir, Aslan; Celen, Sinan; Gunseren, Kadir Omur; GÜNSEREN, KADİR ÖMÜR; Cicek, Mehmet Cagatay; ÇİÇEK, MEHMET ÇAĞATAY; Kilicarslan, Hakan; KILIÇARSLAN, HAKAN; Tıp Fakültesi; Üroloji Ana Bilim Dalı; 0000-0001-8673-3093; 0000-0002-0471-5404; AAO-8934-2021; ABC-9924-2020
    Objectives To investigate the operation time (OT) and ureteral access sheath (UAS) usage with the infection rates and to determine a cut-off value for OT.Methods We retrospectively analysed the data of the patients who underwent flexible ureterorenoscopy (FURS) for renal stones larger than 20 mm between 2010 and 2019. The investigated parameters were OT, UAS using, and infection status. The data were analysed by forming two groups according to whether the OT was less than 60 minutes and more, whether the UAS was used and whether an infection occurred. In addition, independent risk factors that may affect postoperative urinary infection development were also investigated by logistic regression analysis. And, a Receiver Operating Characteristic (ROC) curve analysis was applied to determine a cut-off value in OT terms, where infection rates increase more.Results A total of 575 patients were enrolled in the study. The rates of the usage of UAS and infection were greater statistically in the group for longer than 60 minutes. OT was longer statistically in the infection group than in the group without infection (94.1 +/- 14.2 and 68.01 +/- 23.1, for groups 1 and 2, respectively, P < .05, Table 2). OT was statistically longer in the UAS group than the unused one (79.3 +/- 24.4 and 66.7 +/- 22.4, for groups 1 and 2, respectively, P < .05, Table 3). ROC analyses revealed a cut-off point of 87.5 min for OT in terms of infection rate.Conclusion While the infection risk increases when OT exceeds 60 minutes, FURS can be safely performed up to 87.5 minutes with 89% sensitivity and 69% specificity infection risk.
  • Publication
    The outcomes of kidney transplantation from elder deceased donors a single center experience
    (Lippincott Williams & Wilkins, 2019-11-01) Selimoğlu, Kerem; Elgin, Ersin; Yıldız, Abdülmecit; Oruç, Ayşegül; Akgür, Suat; Ünsal, Oktay; Keskin, Sahriye; Oflaz, Rafet; Arslan, İlknur; Karan, Elif; Çiçek, Mehmet Çağatay; Günseven, Kadir Ömür; Karaca, Mert; Güllülü, N. Sümeyye; Vuruşkan, Hakan; Ersoy, Alparslan; Selimoğlu, Kerem; Elgin, Ersin; Yıldız, Abdülmecit; ORUÇ, AYŞEGÜL; AKGÜR, SUAT; Ünsal, Oktay; Keskin, Sahriye; Oflaz, Rafet; Arslan, İlknur; Karan, Elif; ÇİÇEK, MEHMET ÇAĞATAY; Günseven, Kadir Ömür; KARACA, MERT; GÜLLÜLÜ, NAZMİYE SÜMEYYE; VURUŞKAN, HAKAN; ERSOY, ALPARSLAN; Tıp Fakültesi; Nefroloji Ana Bilim Dalı; 0000-0003-3635-7282; 0000-0002-9509-5799; 0000-0002-0342-9692; 0000-0002-3454-8483; 0000-0002-0471-5404; CDS-3299-2022; DXA-2790-2022; HIG-9032-2022; AAH-4002-2021; EJA-1761-2022; JJY-8484-2023; CZH-6714-2022; DJU-5362-2022; CCH-8947-2022; FDB-4488-2022; HGM-5995-2022; CUF-3990-2022; AAG-7406-2021; CTR-6558-2022; EFH-9523-2022; AAH-5054-2021
  • Publication
    Which frequency is better for pediatric shock wave lithotripsy? Intermediate or low: A prospective randomized study
    (Springer, 2021-04-22) Kaygısız, Onur; Çiçek, Mehmet Çağatay; Mert, Ahmet; Akesen, Selcan; Sarandöl, Emre; Kılıçarslan, Hakan; KAYGISIZ, ONUR; ÇİÇEK, MEHMET ÇAĞATAY; AKESEN, SELCAN; SARANDÖL, EMRE; KILIÇARSLAN, HAKAN; Tıp Fakültesi; Anesteziyoloji Ana Bilim Dalı; 0000-0002-9790-7295; 0000-0002-0471-5404; 0000-0003-4236-3646; 0000-0002-2593-7196; L-9439-2019; HGM-5995-2022; ELR-9087-2022; DXM-3644-2022; FGY-3115-2022
    Purpose Shock wave lithotripsy (SWL) is the first option in the treatment of pediatric kidney stones; however, optimal frequency is still uncertain. The aim of this study was to compare low frequency [60 shocks per minute (SWs/min)] and intermediate frequency [90 SWs/min] in terms of lithotripsy success, complications, cardiac arrhythmia, anesthesia time, secondary procedures, and efficiency quotient (EQ) in children. Methods Seventy-eight consecutive children who received SWL for radiopaque renal stones between July 2016 and January 2020 were randomly divided into two groups: Group 60 (SWL frequency: 60 SWs/min) and Group 90 (SWL frequency: 90 SWs/min). After exclusion (remaining 71 children), Group 60 (n = 38) and Group 90 (n = 33) were compared using univariate analysis. Results The median age of children (37 girls, 34 boys) was 5 (1-16) years. Patient demographics and stone features were similar between the groups. Success rate after the last SWL session was 81.6% (n = 31) for Group 60 and 87.9% (n = 29) for Group 90 (p = 0.527). Stone-free rate after the first, second, and third sessions was 42.1%, 18.4%, and 21.1% for Group 60 and 48.5%, 27.3%, and 12.1% for Group 90, respectively. Additional treatment rate was similar between the groups. In Group 60, the EQ was 57.83, and it was 64.07 in Group 90. Median total anesthesia time was significantly longer in Group 60 (74.5 min) than in Group 90 (32 min; p < 0.001). Conclusion Intermediate frequency and low-frequency pediatric SWL have similar success rates; however, intermediate-frequency SWL has a shorter anesthesia time.
  • Publication
    Evaluation of one year, five years and ten years life time of patients with kidney transplant: Single-center experience
    (Lippincott Williams & Wilkins, 2020-09-01) Elgin, Ersin; Aydın, Mehmet Fethullah; Ünsal, Oktay; Yıldız, Abdulmecid; Oruç, Ayşegül; Günseren, Kadir Ömur; Çiçek, Mehmet Çağatay; Budak, Ferah; Oral, H. Barbaros; Ersoy, Alparlan; Elgin, Ersin; Aydın, Mehmet Fethullah; Unsal, Oktay; Yıldız, Abdulmecid; ORUÇ, AYŞEGÜL; GÜNSEREN, KADİR ÖMÜR; ÇİÇEK, MEHMET ÇAĞATAY; BUDAK, FERAH; ORAL, HALUK BARBAROS; Ersoy, Alparlan; Tıp Fakültesi; Üroloji Ana Bilim Dalı; 0000-0002-9509-5799; 0000-0002-5665-7402; 0000-0002-0342-9692; 0000-0001-7625-9148; 0000-0003-0463-6818; F-4657-2014; K-7285-2012; AAH-4002-2021; AAJ-8220-2020; IZP-9398-2023; DXA-2790-2022; JKA-8956-2023; JJY-8484-2023; EIF-8983-2022; JJO-6552-2023; CNT-9025-2022