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Percutaneous antegrade management of large proximal ureteral stones using non-papillary puncture

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Asian Journal of Urology 2024年第1期11卷 110-114页

作者： Arman tsaturyan Angelis Peteinaris Constantinos Adamou Konstantinos Pagonis Lusine Musheghyan Anastasios Natsos Theofanis Vrettos Evangelos Liatsikos Panagiotis Kallidonisa Department of Urology University of PatrasPatrasGreece Gerald and Patricia Turpanjian School of Public Health American University of ArmeniaYerevanArmenia Department of Anesthesiology and ICU University of PatrasPatrasGreece Department of Urology Medical University of ViennaViennaAustria

Objective:To evaluate the feasibility and the safety of medial non-papillary percutaneous nephrolithotomy(npPCNL)for the management of large proximal ureteral ***:We evaluated prospectively collected data of 37 patients with large proximal ureteral stones more than 1.5 cm in diameter treated by prone *** on stone size,in-toto stone removal or lithotripsy using the Lithoclast®Trilogy(EMS Medical,Nyon,Switzerland)was *** parameters including operative time(from start of puncture to the skin suturing),stone extraction time(from the first insertion of the nephroscope to the extraction of all stone fragments),and the stone-free rate were ***:Twenty-one males and 16 females underwent npPCNL for the management of large upper ureteral *** median age and stone size of treated patients were 58(interquartile range[IQR]:51-69)years and 19.3(IQR:18.0-22.0)mm,*** median operative time and stone extraction time were 25(IQR:21-29)min and 8(IQR:7-10)min,*** case(2.7%)of postoperative bleeding and two cases(5.4%)of prolonged fever were managed *** stone-free rate at a 1-month follow-up was 94.6%.Conclusion:The npPCNL provides a straight route to the ureteropelvic junction and proximal *** from a dilated portion of the ureter under low irrigation pressure with larger diameter instruments results in effective and safe stone extraction within a few minutes.

关键词： Antegrade percutaneous nephrolithotomy Proximal ureteral stone Non-papillary puncture Large ureteral stone Prone percutaneous nephrolithotomy

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亚美尼亚监察员对LGBT权利的响应性

亚美尼亚监察员对LGBT权利的响应性

作者： Artyom tsaturyan 浙江大学

学位级别：硕士

Responding efficiently and effectively to people’s real needs requires engaging the public to identify and articulate its *** is the duty of the Human Rights Defender（Ombudsman）of the Republic of Armenia to protect and restore the human rights and fundamental freedoms of every *** governance also requires contextual sensitivity to,among other things,cultural traditions,power bases and public *** seeking to ensure that effective governance is in place must address all these *** have been many concerns from international organizations over the absence of data on the enjoyment of economic,social and cultural rights by LGBT groups,refugees and asylum-seekers,ethnic minorities as well as protection of their basic human rights in *** main goal of this research is to find out whether Ombudsman’s level of responsiveness varies towards LGBT issues;that is,the degree to which policy outcomes reflect the public opinion including those of *** present research adopted a mixed method approach involving both semi-structured interviews and questionnaire *** has attempted to investigate the responsiveness of Ombudsman’s office towards LGBT rights in *** way LGBT community and NGOs perceive the Ombudsman’s *** data has been compared with the available data on the official website of the Armenian Ombudsman and interview questions have brought to light four major aspects where the Ombudsman needs to be more *** with representatives of LGBT minority groups and NGOs engaged in protection of LGBT rights have been *** lack of data on the minority rights shows the lack of interest and/or attention to this question.A total of 20 LGBT individuals have taken part in the study as well two main NGOs that deal with human rights infringements and give unofficial protection and advice to LGBT *** Ombudsman’s office both present and past,has also been reached and yearly report

关键词：亚美尼亚 LGBT权利监察员响应性

Diagnostic value ultrasound signs of stones less than or equal to 10 mm and clinicoradiological variants of ureteric colic

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Asian Journal of Urology 2023年第1期10卷 39-49页

作者： Denis V.Krakhotkin Volodymyr A.Chernylovskyi Kemal Sarica Arman tsaturyan Evangelos Liatsikos Jurijus Makevicius Nikolay Yu Iglovikov Dmitry N.Pikhovkin Central District Hospital Outpatient ClinicSadovaya Lane 23KamenolomniRostov RegionRussia Private Urological Practice DniproUkraine Department of Urology Biruni University HospitalInstanbulTurkey Department of Urology University Hospital of PatrasPatrasGreece Department of Urology Medical University of ViennaViennaAustria Institute for Urology and Reproductive Health Sechenov UniversityMoscowRussia Institute of Clinical Medicine Faculty of MedicineVilnius UniversityVilniusLithuania Department and Clinic of Urology S.M.Kirov Military Medical Academy of the Ministry of Defense of the Russian FederationSt.PetersburgRussia Central District Hospital Department of SurgeryLenina Avenue 28AksayRostov RegionRussia

Objective:To determine the diagnostic value of ultrasound signs of urinary stones less than or equal to 10 mm and to determine clinico-radiological variants of ureteric ***:A total of 455 ultrasound investigations were performed in patients referring to emergency department with urolithiasis and symptoms suspected of ureteric colic between January 2021 and May *** addition to microscopic evaluation of urine sediment to detect different crystals and non-contrast spiral computed tomography to detect stones,B-mode and color Doppler sonography was performed to assess the presence of acoustic shadow(AS)and twinkle artifacts(TA)as possible signs of stone(s)in ***:While the sensitivity and specificity of AS and TA were higher than 90%in patients with stones greater than 5 mm;positive prognostic values of these parameters were found to be extremely low for stones with sizes of 1-3 mm with specificity and sensitivity values not exceeding 53%.The sensitivity and specificity of AS and TA in the upper and lower ureters were higher for stones greater than or equal to 5 than for compared to those less than 5 *** the same time,the diagnostic values of TA and AS for middle ureter stones were very *** most prevalent clinico-radiological variants of ureteric colic were types I,III,and V being observed in 39%,28% and 21% cases,***:Our results demonstrate that TA and AS parameters seem to have a very low sensitivity and specificity in the diagnosis of urinary stones less than 5 *** diagnostic value of TA and AS increase significantly in stones greater than or equal to 5 ***,clinicians need to be very careful for overestimating the diagnostic values of TA and AS for stones less than 5 mm and non-contrast spiral computed tomography must be the method of choice for patients presenting to emergency department with ureteric colic.

关键词： Ureteric colic Urolithiasis Ultrasound Twinkle artifact Non-contrast computed tomography

On the Model of Spectral Analysis of Optical Radiation

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Journal of Electromagnetic Analysis and Applications 2016年第2期8卷 23-32页

作者： Surik Khudaverdyan Taron Hovhannisyan Nazeli Meliqyan Narine Mehrabyan Stepan tsaturyan Mane Khachatryan Ashok Vaseashta Armenian National Polytechnic University Yerevan Armenia Norwich University Applied Institutes Herndon USA

A silicon photodiode structure was studied for the spectral analysis of optical radiation. The structure consists of oppositely-directed barriers. We developed a model of the electronic processes occurring in the structure. The possibilities of the selection of separate waves from the integral flux of radiation, the wave absorption and the quantitative spectral analysis of the waves of the model for contaminated environment were investigated. An algorithm was developed for carrying out the spectral analysis without the preliminary calibration, and for promoting a possible creation of a new type of a portable semiconductor spectrophotometer.

关键词： Spectral Analysis Monitoring Photosensitivity Photodiode