Browsing by Author "Kaynak, Yurdaer"
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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; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Üroloji Anabilim Dalı.; 0000-0002-0471-5404; 0000-0001-8673-3093; 0000-0002-9790-7295; ABC-9924-2020; L-9439-2019; HGM-5995-2022 ; EFH-9523-2022Objective: 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.Item Unfavorable anatomical factors influencing the success of retrograde intrarenal surgery for lower pole renal calculi(Urology and Nephrology Research Center, 2015-03) Kaynak, Yurdaer; Kılıçarslan, Hakan; Kordan, Yakup; Kaygısız, Onur; Coşkun, Burhan; Günseren, Kadir Ömür; Kanat, Feyzi Mutlu; Uludağ Üniversitesi/Tıp Fakültesi/Üroloji Anabilim Dalı.; 0000-0002-9790-7295; 0000-0001-8673-3093; FGY-3115-2022; GAF-0095-2022; AAM-9726-2020; AAH-9704-2021; ABC-9924-2020; IMZ-5184-2023; 56007473800; 9633365800; 16637252400; 36113105900; 56664496600; 56664310400Purpose: To determine the unfavorable factors, related to lower pole anatomical characteristics (LPACs), influencing the success of retrograde intrarenal surgery (RIRS) for lower pole renal calculi (LPC). Materials and Methods: We reviewed the data of 36 patients who underwent RIRS for LPC between October 2012 and October 2013. The infundibulopelvic angle (TA), infundibular length (IL) and infundibular width (IW) were measured on preoperative intravenous urographies. On follow-up stone-free status was defined as complete clearance at the first month kidney-ureter-bladder X-ray and computed tomography if necessary. Results: The median stone size was 10 mm (range, 5-35). The stone-free rates according to LPACs at the first month follow-up were 100% (n = 17), 57.9% (n = 11), 90% (n = 18), 62.5% (n = 10), 90.5% (n = 19) and 60% (n = 9) for patients with IPA >= 70 degrees, TA < 70 degrees, IL < 3 cm, IL >= 3 cm, IW >= 5 mm and IW < 5 mm, respectively. While TA and IW were associated with success of RIRS for LPC in multivariate analysis (P = .003 and P = .046, respectively), only IW was found to be a significant factor after applying multivariate analysis (P = .05). Conclusion: The results of our study demonstrated that only IW had a significant effect on the success rate of RIRS for LPC.