Yaşar Gökhan Gül

Dr. Yaşar Gökhan Gül

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Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2020 in TURKISH JOURNAL OF MEDICAL SCIENCES
Verified
Journal Article
Open access
AKAli Sefik Koprulu
Ali Sefik Koprulu
AHAli Haspolat
Ali Haspolat
YGYaşar Gökhan Gül
Yaşar Gökhan Gül
NTNursen Tanrikulu
Nursen Tanrikulu
Background/aim: The Analgesia Nociception Index (ANI) is a new method of identifying nociception-analgesia balance. In this study, we investigate the correlation between the ANI and numeric rating scale (NRS) values immediately before and after extubation. The NRS values were recorded in the postanesthesia care unit, in a group of patients who underwent laparoscopic cholecystectomy, with the aim of evaluating the potential use of ANI values in the prediction of postoperative pain levels. Materials and methods: The ANI and NRS values, heartbeat rate (HR), systolic and diastolic arterial pressure (SAP/DAP), and oxygen saturation (SpO(2)) values of the patients were recorded into three groups based on the initial NRS values recorded in the postanesthesia care unit (group I: NRS <= 3, group II: NRS 4-6, group III: NRS >= 7). Patients whose ANI values were lower than 47, considered as the pain threshold, and the groups to which these patients belonged were also recorded. Results: Statistically significant increases were noted in HR, SAP, and DAP after extubation, while there was no significant change in ANI values. A weak correlation was identified between the ANI and NRS values of all patient groups. Conclusion: We failed to identify a correlation between ANI and NRS values before and after extubation. Previous studies suggested that the ANI provides more valuable information in anesthetized patients, whereas our findings show that it is ineffective in the prediction of potential postoperative pain.

13 March 2026 in Medicina
Verified
Journal Article
Open access
PDF file
BKBerhan Keskin
Berhan Keskin
AHAykun Hakgor
Aykun Hakgor
YKYerkenur Khidolda
Yerkenur Khidolda
ADAtakan Dursun
Atakan Dursun
AAAysel Akhundova
Aysel Akhundova
BBBilal Boztosun
Bilal Boztosun
Background and Objectives: Patients with impaired left ventricular ejection fraction (LVEF) undergoing transcatheter aortic valve implantation (TAVI) remain at high risk for adverse outcomes despite successful procedures. Sodium–glucose cotransporter-2 inhibitors (SGLT2i) improve outcomes in heart failure, but their long-term impact after TAVI is not well established. Materials and Methods: This single-center retrospective study included patients with LVEF < 50% who underwent transfemoral TAVI between January 2015 and September 2025. Patients were stratified according to SGLT2i use. The primary outcome was a composite of all-cause mortality and heart failure (HF) hospitalization requiring intravenous diuretics. Secondary outcomes included all-cause mortality, HF hospitalization, and changes in echocardiographic parameters at 6 months. Inverse probability of treatment weighting (IPTW) based on propensity scores was applied to adjust for baseline differences. Time-to-event analyses were performed using IPTW-weighted Cox models and adjusted survival curves. Results: The study included 226 patients (78 SGLT2i users, 148 non-users) with a median follow-up of 37 months. After IPTW adjustment, SGLT2i use was associated with a lower rate of the composite outcome (32.8% vs. 50.8%, p = 0.019) and a lower crude long-term mortality (32.8% vs. 47.4%, p = 0.056). Acute kidney injury after TAVI occurred less frequently among SGLT2i users (3.4% vs. 17.4%, p = 0.013). In IPTW-weighted Cox analyses, SGLT2i use was associated with a reduced risk of all-cause mortality (HR 0.57, 95% CI 0.32–0.98) and the composite outcome (HR 0.56, 95% CI 0.33–0.96). SGLT2i users demonstrated greater reductions in left ventricular end-diastolic diameter at 6 months. Conclusions: In patients with impaired LVEF undergoing TAVI, SGLT2 inhibitor therapy was associated with improved long-term survival, better composite outcome-free survival, and lower rates of post-TAVI acute kidney injury. Larger prospective studies are warranted to confirm these findings.

1 July 2024 in Current Vascular Pharmacology
Verified
Journal Article
Closed access
PDF file
NYNURDAN YILMAZ
NURDAN YILMAZ
YGYaşar Gökhan Gül
Yaşar Gökhan Gül
MUMurat Ugurlucan
Murat Ugurlucan
Background: Transcatheter aortic valve implantation (TAVI) is used for patients with severe aortic stenosis who are at high risk for surgery. Since these patients are elderly and have comorbidities, their management is of great importance. Objectives: This retrospective study compares two anesthesia techniques during TAVI: sedation (ketamine and propofol) and general anesthesia. Methods: Patients with severe aortic stenosis undergoing TAVI during 2021 in our hospital were retrospectively screened. Demographic data, comorbidities, anesthesia management, complications, and mortality of the patients were obtained from the records. Results: There were 137 patients treated with TAVI; 74 (54%) patients had sedation and 63 (46%) had general anesthesia. When the anesthesia management was evaluated, no significant difference in mortality was observed between the patients who received general anesthesia and sedation. After univariate and multivariate logistic regression analyses were performed to investigate factors having an impact on mortality, anemia (only in univariate analysis) in the whole study population was a statistically significant risk factor for mortality in patients undergoing TAVI (p<0.014). Conclusion: There was no significant difference in mortality in terms of anesthesia management. Anemia was a risk factor for mortality (only in univariate analysis) in the whole study population. We concluded that conscious sedation with ketamine and propofol is effective and safe for TAVI procedures compared to general anesthesia.



4 July 2026 in Healthcare
Verified
Journal Article
Open access
PDF file
NYNURDAN YILMAZ
NURDAN YILMAZ
YGYaşar Gökhan Gül
Yaşar Gökhan Gül
Background/Objectives: Extubation technique, postoperative oxygenation, and hypoxemia are critical determinants of respiratory outcomes after general anesthesia. This study evaluated whether positive-pressure extubation improves early postoperative oxygenation and reduces desaturation in patients undergoing cesarean delivery. Methods: In this prospective randomized controlled trial, 120 participants were randomly assigned to positive-pressure or suction extubation. The primary outcome was postoperative desaturation (SpO2 < 92%) within 60 min after extubation. Secondary outcomes included early post-extubation oxygenation and hemodynamic parameters. Multivariable logistic regression was used to identify independent predictors of desaturation. The trial was registered at ClinicalTrials.gov (NCT07251686. Results: Postoperative desaturation occurred in 13.3% of patients in the positive-pressure group and 20% in the suction group (p = 0.327). Mean SpO2 values were significantly higher in the positive-pressure group at 0, 5, and 10 min after extubation (p < 0.01), but were similar at later time points. Extubation technique was not independently associated with desaturation (OR 0.69, 95% CI 0.24–1.98; p = 0.491). Conclusions: Positive-pressure extubation improves early postoperative oxygenation but does not reduce clinically relevant desaturation compared with suction extubation. Overall postoperative respiratory outcomes were comparable between the two techniques in this low-risk obstetric population.