Yazar "Yilmaz, M." seçeneğine göre listele
Listeleniyor 1 - 19 / 19
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Adherence to insulin treatment in insulin naive type 2 diabetic patients: results of telephonic intervention(Springer, 2014) Yavuz, D. Gogas; Bilen, H.; Sancak, S.; Galip, T.; Hekimsoy, Z.; Sahin, I.; Yilmaz, M.[Abstract Not Available]Öğe Biosynthesis of silver nanoparticles using leaves of Stevia rebaudiana(Elsevier Science Sa, 2011) Yilmaz, M.; Turkdemir, H.; Kilic, M. Akif; Bayram, E.; Cicek, A.; Mete, A.; Ulug, B.The synthesis of silver nanoparticles employing a shadow-dried Stevia rebaudiana leaf extract in AgNO3 solution is reported. Transmission electron microscopy and X-ray diffraction inspections indicate that nanoparticles are spherical and polydispersed with diameters ranging between 2 and 50 nm with a maximum at 15 nm. Ultraviolet-visible spectra recorded against the reaction time confirms the reduction of silver nanoparticles indicating that the formation and the aggregation of nanoparticles take place shortly after the mixing, as they persist concurrently with characteristic times of 48.5 min and 454.5 min, respectively. Aggregation is found to be the dominant mechanism after the first 73 min. Proton nuclear magnetic resonance spectrum of the silver nanoparticles reveals the existence of aliphatic, alcoholic and olefinic CH2 and CH3 groups, as well as some aromatic compounds but no sign of aldehydes or carboxylic acids. Infrared absorption of the silver nanoparticles suggests that the capping reagents of silver and gold nanoparticles reduced in plant extracts/broths are of the same chemical composition of different ratios. Ketones are shown to play a somehow active role for the formation of nanoparticles in plant extracts/broths. (C) 2011 Elsevier B.V. All rights reserved.Öğe Blindness following Rupture of Hepatic Hydatid Cyst: A Case Report(Medical Univ Bialystok, 2009) Yucel, N.; Kayaalp, C.; Liceli, A.; Baysal, T.; Yilmaz, M.A 19 year-old woman admitted to Emergency Department with hypotension, sudden loss of vision and acute abdominal pain. Ultrasound and computed tomography demonstrated an occipital infarct in brain and ruptured intraperitoneal cyst of hydatid liver disease. Urgent laparotomy was performed and it included aspiration of cyst contents, peritoneal washing and drainage. Her vision loss improved by 15 hours postoperatively but generalized seizures were started. Weakness in all extremities was present. Cranial MRI demonstrated ischemia in the areas of middle, posterior and anterior cerebral arteries. She was discharged from the hospital with severe neurological deficits (unable to walk, not able to eat herself). Neurological deficits were improved with physiotherapy after two years. There was no recurrence of hydatid cysts in the follow-up of three years. We assumed that anaphylaxis after intraperitoneal rupture of hydatid liver cyst resulted with hypotension and reduced cerebral perfusion, caused the acute vision loss and other neurological symptoms. This unusual presentation of intraperitoneal rupture should be kept in mind particularly in endemic areas of hydatid disease.Öğe Can an Extended Right Lobe be Harvested from a Donor with Gilbert's Syndrome for Living-Donor Liver Transplantation? Case Report(Elsevier Science Inc, 2012) Yilmaz, M.; Unal, B.; Isik, B.; Ozgor, D.; Piskin, T.; Ersan, V.; Gonultas, F.Gilbert's syndrome (GS) is a common cause of inherited benign unconjugated hyperbilirubinemia that occurs in the absence of overt hemolysis, other liver function test abnormalities, and structural liver disease. GS may not affect a patient's selection for living-donor liver transplantation (LDLT). Between February 2005 and April 2011, 446 LDLT procedures were performed at our institution. Two of the 446 living liver donors were diagnosed with GS. Both donors underwent extended right hepatectomies, and donors and recipients experienced no problem in the postoperative period. Their serum bilirubin levels returned to the normal range within 1-2 weeks postoperatively. In our opinion, extended right hepatectomy can be performed safely in living liver donors with GS if appropriate conditions are met and remnant volume is >30%. Livers with GS can be used successfully as grafts in LDLT recipients.Öğe Chronic Graft-Versus-Host Disease After Liver Transplantation: A Case Report(Elsevier Science Inc, 2012) Yilmaz, M.; Ozdemir, F.; Akbulut, S.; Ersan, V.; Koc, C.; Koc, S.; Yilmaz, S.Graft-versus-host disease (GVHD) after orthotopic liver transplantation pun is a rare but significant complication, occuring in 1%-2% of cases with a mortality rate of 85%-90%. It occurs when donor passenger lymphocytes mount an alloreactive response against the host's histocompatibility antigens. It presents as fever, rash, and diarrhea with or without pancytopenia. Between March 2002 and September 2011, among 656 OLT patients 1 (0.15%) had acute GVHD. A biopsy at the 7th posttransplantation month revealed chronic GVHD. Consequently, in the cases that had fever, rash, and/or desquamation of the any part of body after liver transplantation, GVHD must be considered and skin biopsies must be planned for the diagnosis.Öğe Co-liquefaction of the Elbistan Lignite and Poplar Sawdust. Part I: The Effect of the Liquefaction Parameters(Taylor & Francis Inc, 2009) Karaca, H.; Acar, M.; Yilmaz, M.; Keklik, I.In this study, the liquefaction of Elbistan lignite and poplar sawdust, and the co-liquefaction of the Elbistan lignite and the poplar sawdust in an inert atmosphere and in non-catalytic conditions have been examined. Also, the effects of solvent/coal ratio and stirring speed on the total conversion derived as the result of the liquefaction process was attempted to be determined. Based on the results, although the effects of the solvent/coal ratio and the stirring speed on total conversion are similar for both the Elbistan lignite and the poplar sawdust, it was also noted that, under similar conditions, the conversion for the poplar sawdust was higher, as compared to the conversion of the Elbistan lignite. As the result of the liquefaction of Elbistan lignite and poplar sawdust under inert atmospheric conditions, the total conversion was increased partially, depending on both solvent/coal ratio and the speed of stirring. However, it was also noted that the total conversion did not change to a significant extent in high solvent/coal ratios and in stirring speed. As the result of the co-liquefaction of the Elbistan lignite and poplar sawdust under inert atmospheric conditions, total conversion was increased, based on the solvent/coal ratio. However, as in the case of the liquefaction of Elbistan lignite and poplar sawdust, it was noted that the high solvent/coal ratios (i.e., solvent/coal ratios of higher than 2/1) did not have a significant effect on the total conversion that was derived as the result of the co-liquefaction of the Elbistan lignite and poplar sawdust.Öğe En Bloc and Dual Kidney Transplantation: Two Initial Cases from a New Kidney Transplantation Center(Elsevier Science Inc, 2012) Unal, B.; Piskin, T.; Koz, S.; Ulutas, O.; Yilmaz, M.; Yilmaz, S.Aim. The aim of this study was to share our initial successful experiences with en bloc dual kidney transplantation. Cases. En bloc kidney were obtained, for case 1 from a 3-year-old deceased pediatric donor who had undergone cadaveric liver transplantation due to fulminant hepatitis A virus infection 1 week prior. The donor length was 97 cm and weight 13 kg. According to the age and weight of the donor, we selected a 50-year-old respectively. For case 2, a kidney was retrieved from a 20-month-old pediatric donor after development of hypoxic brain injury secondary to status epilepticus. The donor lengh and weight were 75 cm and 13 kg respectively. A 30-year-old female patient was of 162 cm and 59 kg. The suprarenal aorta, suprarenal vena cava, and caval and aortic lumbar branches were closed with running sutures during the backtable procedures. After the classic Gibson incision, the donor aorta was anastomosed to the recipient right common iliac artery, and the donor inferior vena cava to the recipient right common iliac vein in end-to-side fashion. The ureters were implanted with mucosa-to-mucosa ureteroneocystostomies separately according to the Lich-Gregoir technique. After the vascular anastomoses the kidneys had immediate good perfusion in both cases. Postoperative recovery was rapid, the recipients were discharged uneventfullly. Conclusion. En bloc dual kidney transplantation from young pediatric patients to adult recipients can be performed with low mortality and morbidity even by new centers.Öğe Fate of Untreated Pericardial Synovial Sarcoma; A Case Report(Excerpta Medica Inc-Elsevier Science Inc, 2014) Hidayet, S.; Bayramoglu, A.; Otlu, Y. O.; Yilmaz, M.; Yagmur, J.; Ozdemir, R.[Abstract Not Available]Öğe Histopathologic Findings of Cholecystectomy Specimens in Patients Who Underwent Donor Hepatectomy for Living Donor Liver Transplantation(Elsevier Science Inc, 2015) Akbulut, S.; Karagul, S.; Ertugrul, I.; Aydin, C.; Yilmaz, M.; Yilmaz, S.Background. The aim of this study was to discuss the macroscopic and microscopic properties of gallbladder specimens obtained from living liver donors. Methods. The study retrospectively analyzed the clinical and histopathological data of 1088 donors who underwent living donor hepatectomy between March 2005 and September 2014 at Inonu University Faculty of Medicine, Liver Transplantation Center. Age, sex, macroscopic, and microscopic properties of the gallbladder (bladder length, diameter, content, and histopathological properties) were recorded by 2 researchers. Results. A total of 1009 donors aged 17 to 66 years (31.1 +/- 9.5) met the inclusion criteria, whereas 79 donors were excluded due to missing data. In total, 587 donors were male (30.5 +/- 9.1 years [16-63 years]) and 422 were female (31.8 +/- 9.8 years [18-66 years]). Preoperative tests revealed Gilbert syndrome in 3 subjects, whereas other donors' biochemical tests were within normal ranges. The macroscopic examination of gallbladders revealed mean gallbladder wall thickness, length, and width of 1.82 +/- 0.8 mm (1-10 mm), 72 +/- 11.4 mm (40-120 mm), and 52.5 +/- 14 mm (15-90 mm), respectively. The microscopic gallbladder examination showed that 740 donors had a normal gallbladder, 193 had chronic cholecystitis (1 donor had antral metaplasia and 1 had intestinal metaplasia), 40 had cholesterolosis (1 donor had both tubular adenoma and intestinal metaplasia), 15 had minimal chronic cholecystitis (1 donor had pyloric metaplasia), 14 had cholelithiasis, 2 had adenomyosis, 2 had muscular hypertrophy, 1 had papillary hyperplasia, 1 had microdiverticulitis, and 1 had mucosal lymphatic ectasia. Conclusion. The results of this study reflect the actual gallbladder pathologies that can be detected in healthy people. Clearer conclusions can be reached about the epidemiological data on gallbladder as the number of living liver donors increases in the future.Öğe Incidental Appendectomy in Donors Undergoing Hepatectomy for Living-Donor Liver Transplantation(Elsevier Science Inc, 2012) Yilmaz, M.; Olmez, A.; Piskin, T.; Unal, B.; Ersan, V.; Sarici, K. B.; Dirican, A.Background. The aim of this study was to investigate the morbidity associated with appendectomy in living liver donors undergoing hepatectomy. Methods. The medical records of 338 donors who underwent hepatectomies for living-donor liver transplantation between 2008 and 2010 were reviewed retrospectively. The patients were divided into 2 groups on the basis of appendectomy: patients in group A (n = 126) received incidental appendectomies in conjunction with donor hepatectomy, and those in group B (n = 212) underwent hepatectomy alone. Results. No significant difference in age, gender, or body mass index was found between groups. The wound infection rate (P = .037) and length of hospital stay (P = .0038) were higher in group A than in group B. Intraoperative findings in 126 donors in group A were subserosal (n = 4), retrocecal (n = 6), or hard nodular (n = 11) appendix; hyperemic appendix with edema (n = 9); appendix length >= 8 cm (n = 18); and palpable fecalith (n = 78). Histopathologic examination of appendix specimens revealed lymphoid hyperplasia with a fecalith (n = 32), fecalith only (n = 32), acute appendicitis (n = 20), normal anatomy (n = 18), fibrous obliteration (n = 9), lymphoid hyperplasia (n = 9), Enterobius vermicularis (n = 3),appendiceal neuroma (n 1), carcinoid tumor (n = 1), and mucoceles (n = 1). Conclusion. Although incidental appendectomy increased the wound infection rate and length of hospital stay, this procedure is necessary for the prevention of potential complications due to appendicitis when the exploration of the ileocecal region in patients undergoing donor hepatectomy reveals one or more of the following: appendix length >= 8 cm; dropsical, hyperemic, subserosal, nodular, and/or retrocecal appendix; and/or palpable fecaloma.Öğe Is Routine Sternotomy Necessary for Organ Recovery from Deceased Donors? A Comparative Retrospective Study(Elsevier Science Inc, 2012) Yilmaz, M.; Piskin, T.; Akbulut, S.; Ersan, V.; Gonultas, F.; Yilmaz, S.Background. Traditionally, sternotomy and laparotomy are performed to recover thoracoabdominal organs from deceased donors; however, recovering abdominal organs without sternotomy is possible. We evaluated and compared organ recovery from deceased donors, with and without sternotomy. Methods. Between February 2006 and November 2011, organ recovery was performed in 68 deceased donors by our transplantation team. The recovery procedure was carried out using standard techniques in 31 donors (with sternotomy; Group A) and with modified techniques in 37 donors (without sternotomy; Group B). Average age, gender, body mass index (BMI), and time to cold ischemia were compared retrospectively in both groups. The demographic and clinical parameters were compared using a Student I test and chi-square test. The level of statistical significance was set at P < .05. Results. Organ recovery was performed on 31 of 67 (45.6%) deceased donors with sternotomy (Group A) and 37 of 67 (54.4%) without sternotomy (Group B). Thirty-six donors were male and 32 were female. The average donor age was 40.4 +/- 3.4 years in Group A and 52.4 +/- 4.6 years in Group B (P < .02). The average BMI of donors was 26.2 +/- 0.8 kg/m(2) in Group A and 23.9 +/- 0.8 kg/m(2) in Group B. The average time to cold ischemia was 127 +/- 6.2 minutes in Group A and 47.5 +/- 1.8 minutes in Group B (P < .0001). Conclusion. The transition time to cold ischemia can be shortened by harvesting organs without sternotomy in unstable donors, or under conditions in which intrathoracic organs are not recovered.Öğe Living Donor Liver Transplantation for Mushroom Intoxication Caused Acute Liver Failure(Lippincott Williams & Wilkins, 2017) Dirican, A.; Yilmaz, M.; Baskiran, A.; Ozgor, D.; Ates, M.; Koc, S.; Ince, V[Abstract Not Available]Öğe Massive Subcutaneous Emphysema, Pneumoperitoneum, Pneumoretroperitoneum, and Pneumoscrotum Following ERCP in Living Liver Donor: Apparent Life-threatening Event(Lippincott Williams & Wilkins, 2017) Akbulut, S.; Isik, B.; Yilmaz, M.; Karipkiz, Y.; Yilmaz, S.[Abstract Not Available]Öğe Reduction of energy consumption and CO2 emissions of HVAC system in airport terminal buildings(Pergamon-Elsevier Science Ltd, 2022) Yildiz, O. F.; Yilmaz, M.; Celik, A.Airport terminal buildings consume more energy than other buildings in an airport due to their functional and operational characteristics. Heating, ventilation and air conditioning (HVAC) systems have been major energy consumers with a significant contribution to the annual total energy consumption in terminal buildings particularly in harsh climates. Therefore, improvement of energy efficiency of the HVAC system is becoming an increasingly important issue to reduce energy consumption and CO2 emissions of existing terminal buildings. The aim of this study is to analyze and evaluate the effect of various energy conservation strategies on energy consumption and CO2 emissions, including a number of modifications that can be applied to the HVAC system of airport terminal buildings. Erzurum Airport terminal building, located in the coldest climate zone of Turkey, was chosen as the airport terminal building. In order to achieve this goal, six strategies that can create energy savings and cost savings and provide environmental benefits were analyzed and evaluated by building energy simulation. The results indicated that energy consumption could be reduced from 6.3 GWh/year to 2.7 GWh/year and CO2 emissions from 1.9 million kg/year to 0.9 million kg/year by implementing feasible energy conservation strategies. This means that, by implementing the proposed energy-saving projects, energy consumption and CO2 emissions can be reduced by 57.24% and 48.79%, respectively.Öğe Right Lobe Living Donor Liver Transplantation for Adult Patients with Acute Liver Failure: A Single-Center Experience in Turkey(Lippincott Williams & Wilkins, 2012) Ates, M.; Dirican, A.; Hatipoglu, S.; Ince, V; Isik, B.; Yilmaz, M.; Cemallettin, A.[Abstract Not Available]Öğe Right-Lobe Living-Donor Liver Transplantation in Adult Patients With Acute Liver Failure(Elsevier Science Inc, 2013) Ates, M.; Hatipoglu, S.; Dirican, A.; Isik, B.; Ince, V.; Yilmaz, M.; Aydin, C.Background. Right-lobe living-donor liver transplantation (RLDLT) is an excellent option to reduce donor shortages for adult patients with acute liver failure (ALF). The aim of this study was to evaluate the etiologies and outcomes of 30 consecutive adult patients who underwent emergency RLDLT for ALP. Methods. Between January 2007 and September 2011, we examined data from medical records of patients with ALF who underwent RLDLT. Results. Their mean age was 32.2 +/- 13.05 years. The etiologies of ALP were acute hepatitis B (n = 11; 36.6%), hepatitis A (n = 4; 13.3%), drug intoxication (n = 4; 13.3%), pregnancy (n = 2; 6.7%), hepatitis B with pregnancy (n = 1; 3.3%), mushroom intoxication (n = 1; 3.3%), and unknown (n = 7; 23.3%). The mean hepatic coma grade (Model for End-Stage Liver Disease score) was 34.13 +/- 8.72. The 43 (48.7%) postoperative complications were minor (grades I-II) and 44 (51.3%) were major (grades III-V). Reoperation was required in 14 of 30 (47%) recipients (grades IIIb-IVa). Deaths occurred owing to pulmonary (n = 2), cardiac (n = 1), septic (n = 2), or encephalopathic (n = 4) complications. The mean durations of intensive care unit stay and postoperative hospitalization were 3.2 +/- 2.3 and 29.5 +/- 23 days, respectively. The survival rate was 70%. The mean follow-up duration was 305 days (range, 1-1582). Conclusion. Liver transplantation is potentially the only curative modality, markedly improving the prognosis of patients with ALP. The interval between ALF onset and death is short and crucial because of the rapid, progressive multiorgan failure. Thus, RLDLT should be considered to be a life-saving procedure for adult patients with ALF, requiring quicker access to a deceased-donor liver graft and a short ischemia time.Öğe Sensor Augmented Patch Pump with Predictive Low Glucose Suspend Feature in Elderly Patients with Brittle Diabetes(Elsevier Ireland Ltd, 2023) Hacisahinogullari, H.; Caklili, O. Telci; Cakmak, R.; Yilmaz, M.; Sarar, S. Tekin; Gurkan, E.; Sahin, I.[Abstract Not Available]Öğe Temporary Parenteral Tacrolimus Requirement due to Unexplained Low Through Levels in a Liver Transplant Patient with Short Bowel Syndrome(Avicenna Organ Transplant Center, 2014) Ince, V.; Ozdemir, F.; Isik, B.; Yilmaz, M.; Kayaalp, C.; Yilmaz, S.An adequate level of tacrolimus in serum should be obtained to prevent acute rejection following liver transplantation. Because of good gastrointestinal absorption of oral tacrolimus, adequate trough levels can be achieved even in patients with short bowel syndrome. Rarely, adequate through levels cannot be obtained by oral administration of the drug for several reasons such as inadequate absorption, having a discordant patient, laboratory error, and/or interactions with other drugs and foods. Here, we described a 16-year-old patient who had undergone massive intestinal resection due to mesenteric torsion 5 years previously and required liver transplantation for cryptogenic cirrhosis. Her remnant small bowel length was 90 cm. After a successful living donor liver transplantation, oral tacrolimus administration resulted in inadequate through levels in some parts of the postoperative period. We checked up all the potential reasons but could not identify any cause. An intravenous tacrolimus including immunosuppressive regimen was temporarily required. She maintained adequate blood levels of tacrolimus by parenteral route for a while; thereafter, oral administration resulted in enough blood drug levels. She was discharged with oral tacrolimus therapy. We concluded that very rarely, adequate blood levels of tacrolimus cannot be achieved by oral administration for unexplained reasons. In such cases, temporary administration of parenteral tacrolimus can be life-saving.Öğe Venous Outflow Obstruction Following Living Donor Liver Transplantation: Analysis of 1011 Liver Transplant Cases(Lippincott Williams & Wilkins, 2017) Koc, S.; Akbulut, S.; Soyer, V; Yilmaz, M.; Barut, B.; Kutlu, R.; Yilmaz, S.[Abstract Not Available]
