Hasan Elkan

Dr. Hasan Elkan


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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14 November 2020 in Obesity Surgery
Verified
Journal Article
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YÇYusuf Çekici
Yusuf Çekici
BKBedri Caner Kaya
Bedri Caner Kaya
HEHasan Elkan
Hasan Elkan

5 December 2024 in Diagnostics
Verified
Journal Article
Open access
HYHüseyin Yönder
Hüseyin Yönder
MÇMehmet Çelik
Mehmet Çelik
MBMehmet Sait Berhuni
Mehmet Sait Berhuni
AGAHMED CIHAD GENC
AHMED CIHAD GENC
HEHasan Elkan
Hasan Elkan
AUAli Uzunkoy
Ali Uzunkoy
Objectives: Fournier’s gangrene is an aggressive, rapidly progressing, and life-threatening necrotizing fasciitis of the perineal and genital regions. Various scoring systems have been developed for predicting survival and prognosis in Fournier’s gangrene. This retrospective study aimed to evaluate the effectiveness of the newly developed Fournier’s gangrene mortality index (FGMI) in predicting mortality associated with Fournier’s gangrene. Methods: The study included patients over the age of 18 years who were followed-up with a diagnosis of Fournier’s gangrene in the general surgery clinics of three different hospitals in Şanlıurfa province between 2014 and 2024. The patients included in this study were divided into two groups: deceased (n = 20) and surviving (n = 149). In FGMI, the parameters used were age, creatinine level, albumin level, lymphocyte percentage, and neutrophil-to-lymphocyte ratio. Based on the total score and risk assessment, <5 points were categorized as low-to-moderate mortality risk and ≥5 points as high mortality risk. Results: A total of 169 patients with a diagnosis of Fournier’s gangrene were included in the study; 87 were men (51.48%). The median age of all patients was 53 (40–63) years; 20 patients (11.8%) died. The Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) score did not show a statistically significant difference between the deceased and surviving groups (p = 0.5). Compared to the survivors, the deceased had higher neutrophil counts, neutrophil percentages, neutrophil-to-lymphocyte ratios, platelet-to-lymphocyte ratios, and C-reactive protein-to-albumin ratios, whereas lymphocyte counts, lymphocyte percentages, eosinophil counts, eosinophil percentages, monocyte counts, and monocyte percentages were lower, and these differences were statistically significant. According to receiver operating characteristic (ROC) analysis, the ROC-area under the curve for predicting mortality based on an FGMI score of ≥5 was 0.88 (95% CI: 0.80–0.95) with a sensitivity of 90% and a specificity of 70% (p < 0.001). Univariate risk analysis was performed, and the odds ratio revealed that mortality risk in patients followed-up for Fournier’s gangrene with a FGMI score of ≥5 was 20 times higher (4.48–90.91) (p < 0.001). Conclusions: The results reveal that the FGMI score is a scoring system that can predict mortality at the initial clinical presentation of patients with Fournier’s gangrene. Another important finding of the present study is that the LRINEC score was not sufficiently effective in predicting mortality.

1 February 2021 in Andrologia
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HÖHalil F. Öncel
Halil F. Öncel
RSRemzi Salar
Remzi Salar
EÖEngin Özbay
Engin Özbay
HEHasan Elkan
Hasan Elkan
Sexual functionality significantly contributes to health-related quality of life and can decrease with obesity. In this study, we aimed to prospectively evaluate the changes that occur in the erection function, sexual function and testosterone level of male patients scheduled to undergo bariatric surgery, as well as the changes in the sexual function of their partner. A total of 40 patients and their partners were included. International Index of Erectile Function-5 (IIEF-5) questionnaire and the Arizona Sexual Experience Scale (ASEX) were filled before and 6 months after surgery by the male patients. The ASEX form was also completed by the partners before and 6 months after the procedure. The height and weight measurements and testosterone values were measured before and after surgery. A statistically significant difference was found between the preoperative and post-operative IIEF-5 scores of the patients (p = 0.000 < 0.01). There was also a statistically significant difference between the patients and their partners' preoperative and post-operative ASEX scores. We can conclude that the partners of men with preoperative erection complaints also experience sexual dysfunction, and with the post-operative decrease in or disappearance of erection complaints, the sexual function of both male patients and their partners improves.


8 July 2022 in Journal of Interventional Cardiology
Verified
Journal Article
Open access
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HEHasan Elkan
Hasan Elkan
MBMehmet Memduh Baş
Mehmet Memduh Baş
BKBerna Kaya
Berna Kaya
Background. Thrombomodulin, an integral membrane protein functioning as a cofactor in the anticoagulant pathways, has recently emerged as a marker of endothelial dysfunction. This study aimed to investigate the impact of laparoscopic sleeve gastrectomy (LSG) on thrombomodulin concentration and early markers of atherosclerosis. Methods. Forty-four subjects undergoing LSG were prospectively examined. The change in thrombomodulin concentration from baseline (preoperative) to the sixth postoperative month following the LSG and the relationship between the change in thrombomodulin concentration and BMI, CIMT, ABI, and blood lipids were examined. Results. The medical records were available for 44 patients (mean age: 37.2 ± 10.9 years, 65.9% male). LSG led to significant reductions in total body weight and body mass index (BMI) at postoperative six months (37.0 ± 5.6 kg/m2 vs. 47.1 ± 5.8 kg/m2, ). Markers of early atherosclerotic events, including carotid intima-media thickness (CIMT) and ABI, improved. The change in thrombomodulin concentration (Δ TMD) was significantly correlated with the change in Δ BMI (r = 0.500, ), Δ LDL (r = 0.389, ), Δ systolic blood pressure (r = 0.384, ), and Δ CIMT (r = 0.327, ) and was negatively correlated with Δ HDL (r = −0.344, ) and Δ ABI (r = −0.357, ). Conclusion. LSG leads to significant improvements in blood lipids, systolic and diastolic blood pressure, and in surrogate markers of atherosclerotic burden and endothelial function, including thrombomodulin, ABI, and CIMT, at postoperative six months. LSG might prevent or reduce atherogenesis in the early stages by stopping endothelial dysfunction.

14 March 2025 in Obesity Surgery
Verified
Journal Article
Open access
PDF file
MTmüslüm toptan
müslüm toptan
HEHasan Elkan
Hasan Elkan
HEHamza Erdogdu
Hamza Erdogdu
ÖGÖmer GÖÇ
Ömer GÖÇ
OYOMER FARUK YILMAZ
OMER FARUK YILMAZ
Purpose: This study aimed to investigate the effects of metabolic and bariatric surgery (MBS) on the corneal and anterior segment parameters of the eye. Materials and Methods: In this study, the anterior chamber depth, volume, angle and central corneal thickness of obese patients who underwent laparoscopic sleeve gastrectomy surgery were prospectively examined using Pentacam topography before and six months after surgery. Results: A total of 112 eyes of 56 individuals, including 26 males with a mean age of 38.88 ± 7.00 years and 30 females with a mean age of 40.94 ± 7.76 years, were evaluated (p = 0.310). Six months following MBS, the average body mass index (BMI) in men decreased from 45.5 kg/m2 to 34 kg/m2 (p < 0.001), and the BMI decreased from 47 kg/m2 to 33 kg/m2 (p < 0.001) in women. Central corneal thickness and intraocular pressure decreased significantly in both men and women. The anterior chamber depth, volume and angle ​​significantly increased six months after surgery (p < 0.001 for all parameters). A statistically significant negative correlation was observed between postoperative BMI and anterior chamber depth, volume and angle in both sexes (p < 0.001 for all). Conclusion: This study revealed that anterior segment values, intraocular pressure, and corneal thickness may change after MBS. Caution should be exercised when evaluating for cataracts and refractive surgery after MBS. Graphical