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First report of the histopathological effect of electrocautery using on the urethral taste rosea during glans penis injury by incision in rabbits

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Asian Journal of Urology 2024年第1期11卷 115-120页

作者： Ozgur Caglar Ayhan Kanat mehmet Dumlu Aydin Nezih Akca Sevilay ozmen Ataturk University Medical FacultyDepartment of Pediatric SurgeryErzurumTurkey Recep Tayyip Erdogan University Medical FacultyDepartment of NeurosurgeryRizeTurkey Ataturk University Medical FacultyDepartment of NeurosurgeryErzurumTurkey Recep Tayyip Erdogan University Medical FacultyDepartment of UrologyRizeTurkey Ataturk University Medical FacultyDepartment of PathologyErzurumTurkey

Objective:Currently,electrocautery devices have frequently been used in penile surgical *** hypothesized that electrocautery using during penile surgical procedures may harm the taste rosea and the dorsal nerve of the penis or ***:Eighteen young age male New Zealand rabbits were studied:five in the control(Group I,n=5),five in the penile surgery without using electrocautery(sham group,Group II,n=5),eight in the monopolar cautery(study group,Group III,n=8)groups under general *** animals were followed for 3 weeks and *** tissue—pudendal nerve root complexes and dorsal root ganglion of sacral 3 level were examined using stereological *** results were compared ***:The live and degenerated taste bud-like structures and degenerated neuron densities of pudendal ganglia(mean±standard deviation,n/mm^(3))were estimated as 198±24/mm^(3),4±1/mm^(3),and 5±1/mm^(3) in Group I;8±3/mm^(3),174±21/mm^(3),and 24±7/mm^(3) in Group II;and 21±5/mm^(3),137±14/mm^(3),and 95±12/mm^(3) in Group III,*** of taste buds and pudendal ganglia was significantly different between ***:Intact spinal cord and normal parasympathetic and thoracolumbar sympathetic networks are crucial for human sexual *** present study indicates that the glans penis injury by using electrocautery may lead to pudendal ganglia *** damage to taste rosea and retrograde degeneration of the pudendal nerve may be the cause of sexual dysfunction responsible mechanism.

关键词： Urethral taste rosea Tastebuds Pudendalnerve Degeneration Penile surgery

Rare-earth Magnet Free Flux-switching Generator for Wind Turbines in Micro-grids:A Review

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CES Transactions on Electrical Machines and Systems 2024年第3期8卷 295-309页

作者： Tugberk ozmen BatıEren Ergun mehmet Onur Gulbahce Nevzat Onat Vocational School of Manisa Technical Sciences Manisa 45140Turkey department of Electrical Engineering Istanbul Technical UniversityIstanbul 34469Turkey Department of Electrical and Electronics Engineering University of Manisa Celal Bayar UniversityManisa 45140Turkey

In traditional electricity generation plants,large powerful synchronous,induction,and direct current generators were *** the proliferation of microgrids focused on electricity generation from renewable energy sources in today’s power grids,studies have been conducted on different types of *** of the traditional generator architecture,generators with brushless structures,particularly those utilizing magnets for excitation,have found broad *** generators(FSGs)are innovative types owing to their robust structure,active stator design,and high power density ***,designs have typically relied on rare-earth element ***-earth magnets possess negative characteristics such as price uncertainty,the potential risk of scarcity in the future,and limited geographical production,leading to research on FSGs that do not depend on rare-earth *** study comprehensively examines FSGs that do not use rare-earth element *** study delves into the usage areas,operational mechanisms,structural diversities,and counterparts in the literature of these generators.

关键词： Flux-switching Generator Micro-grid Wind energy

Relationship between LYVE-1, VEGFR-3 and CD44 gene expressions and lymphatic metastasis in gastric cancer

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World Journal of Gastroenterology 2011年第27期17卷 3220-3228页

作者： Fusun ozmen M mahir ozmen Evren Ozdemir Munevver Moran Selda Sekin Dicle Guc Ergun Karaagaoglu Emin Kansu Department of Basic Oncology Hacettepe University Institute of Oncology06100 Ankara Turkey Department of General Surgery Ankara Numune Teaching and Research Hospital06100 Ankara Turkey Department of Emergency Medicine Hacettepe University Medical School06100 Ankara Turkey Department of Medical Oncology Hacettepe University Institute of Oncology06100 Ankara Turkey Department of Pathology Ankara Numune Teaching and Research Hospital06100 Ankara Turkey Department of Biostatistics and Medical Informatics Hacettepe University Faculty of Medicine06100 AnkaraTurkey

AIM: To investigate the expression levels of lymphatic vessel endothelial hyaluronan receptor-1 (LYVE-1), vascular endothelial growth factor receptor-3 (VEGFR-3) and CD44 genes and the relationship between their lev- els and clinicopathological parameters in gastric ***: Tissue samples were obtained from 33 patients (8 females) with gastric cancer. mRNA levels of LYVE-1, VEGFR-3 and CD44 in normal and tumor tissues were quantitatively measured using real time polymerase chain reaction. The results were correlated with lymph node metastasis, histological type and differentiation of the tumor, T-stage, and presence of vascular, perineural and lymphatic invasions. The distribution of molecules in the tissue was evaluated using immunohistochemistry. RESULTS: LYVE-1, CD44 and VEGFR-3 gene expression levels were significantly higher in gastric cancer than in normal tissue. While there was no correlation between gene expressions and clinicopathologic fea- tures such as histologic type, differentiation and stage, gene expression levels were found to be increased in conjunction with positive lymph node/total lymph node ratio and the presence of perineural invasion. A significant correlation was also found between LYVE-1 and CD44 over-expressions and perineural invasion and lymph node positivity in gastric cancers. When the dis- tribution of LYVE-1 antibody-stained lymphatic vessels in tissue was evaluated, lymphatic vessels were located intra-tumorally in 13% and peri-tumorally in 27% of the patients. Moreover, lymph node metastases were also positive in all patients with LYVE-1-staining. CONCLUSION: LYVE-1, VEGFR-3 and CD44 all play an important role in lymphangiogenesis, invasion and metastasis. LYVE-1 is a perfectly reliable lymphatic vessel marker and useful for immunohistochemistry.

关键词： CD44 Gastric cancer Lymphatic metastasis Lymphatic vessel endothelial hyaluronan receptor-1 Metastasis Vascular endothelial growth factor receptor-3

Comparison of clinical outcomes of deep anterior lamellar keratoplasty and excimer laser assisted anterior lamellar keratoplasty in keratoconus

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International Journal of Ophthalmology(English edition) 2019年第4期12卷 582-586页

作者： Kübra Serbest Ceylanoglu Bahri Aydin mehmet Cuneyt ozmen Department of Ophthalmology Sincan State Hospital Department of Ophthalmology Gazi University Medical School

AIM: To compare and evaluate the clinical outcomes of deep anterior lamellar keratoplasty(DALK) and excimer laser assisted anterior lamellar keratoplasty(ELLK) in eyes with ***: In this study, 57 eyes of 56 patients operated between 2013 to 2017 were included. Thirty-one eyes underwent big-bubble DALK and twenty-six eyes underwent ELLK. Preoperative and at control visits complete ophthalmic examination was performed. RESULTS: The mean patient age at the time of DALK surgery was 27 y and mean follow-up period was 21±5.4 mo. The mean patient age at the time of ELLK surgery was 27 y and mean follow-up period was 40±18 mo. Mean best spectacle corrected visual acuity(BSCVA) at postoperative period was significantly higher for DALK group(0.66±0.11) versus ELLK group(0.4±0.2)(P<0.05). Descemet's membrane microperforation was occurred in 7 patients in DALK group versus in 1 patient in ELLK group. In 4 eyes, interface irregularity was developed in ELLK group. None of the patients in follow-up had graft rejection in both ***: In ELLK group, complication rate is lower, the surgical technique is simpler, faster and safer and also ELLK requires less experience with respect to DALK. Further, DALK can be performed unless satisfactory visual acuity is achieved after ELLK.

关键词： excimer laser assisted lamellar keratoplasty deep anterior lamellar keratoplasty big-bubble technique

In-vivo corneal biomechanical analysis of unilateral keratoconus

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International Journal of Ophthalmology(English edition) 2015年第6期8卷 1141-1145页

作者： Orhan Ayar mehmet Cuneyt ozmen Orkun Muftuoglu mehmet Orcun Akdemir Mustafa Koc Kemal Ozulken Department of Ophthalmology Bulent Ecevit University Department of Ophthalmology Gazi University Department of Ophthalmology Medipol University Ulucanlar Eye Research and Education Hospital Kudret Eye Hospital

AIMTo evaluate and compare corneal biomechanical findings measured by ocular response analyzer, topographic and pachymetric findings in patients with unilateral keratoconus patients and healthy *** is an observational, case-control study. Patients with keratoconus in one eye and forme fruste keratoconus in the fellow eye were compared with sex and age matched with controls healthy subjects. All subjects were evaluated with rotating scheimpflug imaging system. The receiver-operating-characteristic curves were analyzed to evaluate the sensitivity and specificity of the ***-seven patients with keratoconus in one eye and forme fruste keratoconus in the fellow eye were compared with 40 eyes of 40 normal subjects. Corneal hysteresis (CH) was 8.0±1.7 mm Hg in keratoconus group, 8.3±1.6 mm Hg in forme fruste keratoconus group, and 9.8±1.6 mm Hg in control groups (P=0.54 between keratoconus and forme fruste keratoconus groups, P<0.01 between control group and other groups). Corneal resistance factor (CRF) was 7.1±2.2 mm Hg in keratoconus group, 7.8±1.2 mm Hg in forme fruste keratoconus group and 9.9±1.5 mm Hg in control group (P<0.001 between control group and other groups). Using receiver-operating-characteristic analysis, the area under curve values of the parameters to distinguish forme fruste keratoconus from control subjects were: CH (0.768), CRF (0.866). Best cut-off points were 9.3 mm Hg and 8.8 mm Hg for CH and CRF *** response analyzer parameters (CH and CRF) are found to be significantly lower in forme fruste keratoconus patients compared to normal control subjects.

关键词： forme fruste keratoconus keratoconus ocular response analyzer

A histological study of rabbit corneas after transepithelial corneal crosslinking using partial epithelial photoablation or ethanol treatment

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International Journal of Ophthalmology(English edition) 2014年第6期7卷 959-963页

作者： mehmet Cuneyt ozmen Ahmet Hondur Guldal Yilmaz Kamil Bilgihan Berati Hasanreisoglu Department of Ophthalmology Gazi University Department of Pathology Gazi University

AIM: To evaluate the histological changes after transepithelial corneal crosslinking(CXL) using partial thickness excimer laser ablation or epithelial ethanol application in an experimental rabbit ***: Right eyes of twenty-four rabbits were studied. Four eyes received total epithelial debridement(group I). Four eyes received partial thickness epithelial ablation with excimer laser(group II). Twelve eyes were treated with different durations(30s and 60s) and concentrations(18% to 48%) of ethanol(group III).Riboflavin was applied for 30 min intervals along with topical proparacaine drops with benzalkonium chloride,and 370 nm irradiation was performed for 30 min, while riboflavin was instilled every 3min. Four eyes(group IV)received 48% ethanol for 30 s without riboflavin and irradiation. Eyes were collected after 24 h and examined ***: All eyes in group I showed keratocyte loss in the superficial 300 μ of corneal storma. In group II, 1-4layers of epithelium were preserved and no keratocyte loss occurred. In group III, CXL after treatment with ethanol up to 24% concentration and up to 60 s revealed no keratocyte loss. CXL after treatment with 48% and higher ethanol concentrations yielded keratocyte loss in the superficial 200 μ to 300 μ of ***: Incomplete excimer laser ablation of the epithelium or treatment with ethanol up to 24%concentration and up to 60 s duration yielded no stromal keratocyte loss. To get the same histological appearance seen in epithelial debridement group, partial thicknessexcimer laser epithelial ablation or ethanol application is not adequate for transepithelial CXL.

关键词： crosslinking keratoconus transepithelial photoablation ethanol histology

Predictors of poor outcome in gastrointestinal bleeding in emergency department

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World Journal of Gastroenterology 2016年第16期22卷 4219-4225页

作者： Ender Kaya mehmet Ali Karaca Deniz Aldemir M mahir ozmen Dr. Nafiz Korez State Hospital Sincan 06932 Ankara Turkey Emergency Medicine Department Faculty of Medicine Hacettepe University Sihhiye 06100 Ankara Turkey General Surgery Department Faculty of Medicine Hacettepe University Sihhiye 06100 Ankara Turkey

AIM: To determine the prognostic risk factors of gastrointestinal bleeding in emergency department ***: The trial was a retrospective single-center study involving 600 patients over 18-years-old and carried out with approval by the Institutional Ethics Committee. Patient data included demographic characteristics, symptoms at admission, past medical history, vital signs, laboratory results, endoscopy and colonoscopy results, length of hospital stay, need of intensive care unit(ICU) admission, and mortality. Mortality rate was the principal endpoint of the study, while duration of hospital stay, required interventional treatment, and admission to the ICU were secondary ***: The mean age of patients was 61.92-yearsold. Among the 600 total patients, 363(60.5%) underwent upper gastrointestinal endoscopy and the most frequent diagnoses were duodenal ulcer(19.2%) and gastric ulcer(12.8%). One-hundred-and-fifteen(19.2%) patients required endoscopic treatment, 20(3.3%) required surgical treatment, and 5(0.8%) required angiographic embolization. The mean length of hospital stay was 5.21 ± 5.85 d. The mortality rate was 6.3%. The ICU admission rate was 5.3%. Patients with syncope, higher blood glucose levels, and coronary artery disease had significantly higher ICU admission rates(P = 0.029, P = 0.043, and P = 0.002, respectively). Patients with low thrombocyte levels, high creatinine, high international normalized ratio, and high serum transaminase levels had significantly longer hospital stay(P = 0.02, P = 0.001, P = 0.019, and P = 0.005, respectively). Patients who died had significantly higher serum blood urea nitrogen and creatinine levels(P = 0.016 and P = 0.038), and significantly lower mean blood pressure and oxygen saturation(P = 0.004 and P = 0.049). Malignancy and low Glasgow coma scale(GCS) were independent predictive factors of ***: Prognostic factors for gastrointestinal bleeding in emergency room cases are malignancy, hyp

关键词： Gastrointestinal bleeding Poor prognosis Mortality Emergency department Kidney function Malignancy

Retinal vessel diameters and their correlation with retinal nerve fiber layer thickness in patients with pseudoexfoliation syndrome

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International Journal of Ophthalmology(English edition) 2015年第2期8卷 332-336页

作者： mehmet Cuneyt ozmen Zeynep Aktas Burcin Kepez Yildiz Murat Hasanreisoglu Berati Hasanreisoglu Department of Ophthalmology Gazi University Medical School

AIM: To compare retinal artery-vein diameters(RAVDs)of patients with pseudoexfoliation(PSX) syndrome with healthy controls and investigate the correlations between retinal nerve fiber layer(RNFL) thickness parameters and ***: Seventeen eyes with PSX and 17 eyes of age-matched controls were included in the study. All participants underwent routine ophthalmological examination, Humphrey visual field and RNFL examination by using Stratus OCT. Retinal images were obtained by using a retinal camera(Topcon 501X).RAVDs were measured from inferior nasal, inferior temporal, superior nasal and superior temporal arcuates by using IMAGEnet software. Superior, inferior, nasal,temporal and average RNFL thicknesses were *** and RNFL parameters in groups and correlations were analyzed by Mann-Whitney U and Spearmann correlation ***: Only inferior quadrant and average RNFL thickness were detected thinner in the PSX group compared with control group(P =0.009, P =0.038,respectively). No statistically significant difference regarding RAVDs was found between two ***: RAVDs seems to be comparable in the PSX and control group. RNFL is thinner in the inferior quadrant in the PSX group. RNFL thickness and RAVDs show significant correlations in both groups. This correlation doesn’t seem to be specific to PSX.

关键词： pseudoexfoliation retinal nerve fiber layer thickness retinal artery-vein diameters

Emergency admissions due to swallowed foreign bodies in adults

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World Journal of Gastroenterology 2013年第38期19卷 6447-6452页

作者： Bülent Erbil mehmet Ali Karaca mehmet Ali Aslaner Zaur Ibrahimov mehmet mahir Kunt Erhan Akpinar mehmet mahir zmen Department of Emergency Medicine Faculty of MedicineHacettepe University06100 AnkaraTurkey Department of Radiology Faculty of MedicineHacettepe University06100 AnkaraTurkey Department of General Surgery Faculty of MedicineHacettepe University06100 AnkaraTurkey

AIM:To study a retrospective analysis of patients who presented to the emergency departments(ED)with complaints related to foreign body ***:Patients older than 16 years of age who presented to the ED between January 1stand December 31stof 2010 with complaints related to swallowed foreign bodies were identified from electronic health records and patient ***:A total of 100 patients presented with a complaint of foreign body ingestion during the study ***,an X-ray was performed on 75 patients,and a fiberoptic evaluation was performed on45 patients.A foreign body was detected in 46(46%)*** diagnostic yield of the X-ray was 27(36%)out of 75 patients,while the diagnostic yield of the fiberoptic evaluations was 21(47%)out of 45 *** detected foreign bodies were mostly located in the esophagus(17 out of 46 foreign bodies detected).When the types of ingested foreign bodies were evaluated,52(52%)patients reported ingesting food,and19(19%)patients reported swallowing *** X-ray was performed on 33 patients with accidental food ingestions but yielded a positive result in only two *** 12 out of 21 patients with accidental food ingestion who underwent fiberoptic evaluation,the foreign material was detected and ***:Plain radiography is helpful in the localization of radiopaque swollen foreign bodies,while fiberoptic methods are useful as both diagnostic and therapeutic tools,regardless of radiopacity.

关键词： Foreign body Ingestion Gastrointestinal tract Endoscopy Emergency