Person: KOYTAK, İBRAHİM ARİF
72 results
Search Results
Now showing 1 - 10 of 72
Publication Metadata only Idiopatik orbital inflamatuar hastalığı olan ve uzun sure tedavisiz kalmış bir olgu(2014-11-09) AYINTAP, EMRE; UMURHAN AKKAN, JÜLİDE CANAN; KOYTAK, İBRAHİM ARİF; ARTUNAY, OZGUR; ALTINISIK, MUHAMMED; SEZER, TAHA; TUNCER, KEMAL; UMURHAN AKKAN, JÜLİDE CANAN; KOYTAK, İBRAHİM ARİF; SEZER, TAHAPublication Metadata only Comparison of mechanical and femtosecond laser tunnel creation for intrastromal corneal ring segment implantation in keratoconus: prospective randomized clinical trial.(2010-09-01T00:00:00Z) KUBALOGLU, A; SARI, ES; ÇINAR, Y; CINGU, K; Koytak, A; COSKUN, E; OZERTURK, Y; KOYTAK, İBRAHİM ARİFPublication Metadata only Optik koherens tomografisinde farklı morfolojideki diyabetik makula odemi alt gruplarının intravitreal steroid enjeksiyonuna yanıtı(2011-10-09) KOYTAK, İBRAHİM ARİF; UMURHAN AKKAN, JÜLİDE CANAN; OZSUTCU, MUSTAFA; ARAS, CENGİZ; KOYTAK, İBRAHİM ARİF; UMURHAN AKKAN, JÜLİDE CANANPublication Metadata only Oxidant-Antioxidant Balance in the Aqueous Humor of Patients with Retinal Vein Occlusion.(2018-01-01) Altinisik, M; Koytak, A; ELBAY, AHMET; TOKLU, E; SEZER, TAHA; KOCYIGIT, ABDÜRRAHİM; KOYTAK, İBRAHİM ARİF; ELBAY, AHMET; SEZER, TAHA; KOÇYİĞİT, ABDÜRRAHİMPublication Metadata only Ileri derecede gelişmiş lakrimal keseekstravazasyon mukoseli nadir bir olgu(2012-10-21) AYINTAP, EMRE; OZSUTCU, MUSTAFA; KOYTAK, İBRAHİM ARİF; UMURHAN AKKAN, JÜLİDE CANAN; TUNCER, KEMAL; KOYTAK, İBRAHİM ARİF; UMURHAN AKKAN, JÜLİDE CANANPublication Metadata only Evaluation of xenon, light-emitting diode (LED) and halogen light toxicity on cultured retinal pigment epithelial cells(2018-11-01) SEZER, TAHA; ALTINIŞIK, MUHAMMED; GÜLER, ERAY METİN; Kocyigit, Abdurrahim; ÖZDEMİR, MEHMET HAKAN; KOYTAK, İBRAHİM ARİF; GÜLER, ERAY METİN; KOÇYİĞİT, ABDÜRRAHİM; ÖZDEMİR, MEHMET HAKAN; KOYTAK, İBRAHİM ARİFObjective: To compare the possible toxic effects of three light sources used in vitreoretinal endoillumination systems; halogen, xenon, and light-emitting diode (LED) on retinal pigment epithelium (RPE) cell cultures, after two different exposure times. Material and methods: ARPE-19 human RPE cell cultures were exposed to halogen, xenon, and LED light sources at a distance of 1.5 cm for 30 and 60 min with equal lumen output levels. Cells in the control group were not exposed. RPE cell cultures were compared in terms of cell viability, DNA damage, apoptosis rate, and IL-1 ss, IL-6, and TNF- alpha levels. Results: The halogen light group showed significantly more DNA damage, higher TNF-alpha, IL-1 beta, and IL-6 levels, and lower viable cell count at 30 min compared to the control group. The rates of early and late apoptosis were also significantly higher at 60 min. There were no statistically significant differences in any of the parameters between the xenon and LED light sources and the control group at 30 or 60 min. Conclusion: New generation lights, xenon, and LED, seem to be safe in terms of RPE cells. Halogen light may cause toxic effects on RPE cells when used for a long time with maximal power output.Publication Metadata only Regression of Serous Macular Detachment After Intravitreal Dexamethasone Implant in Patients with Diabetic Macular Edema.(2019-10-24) Ozdemir, MH; Ekinci, C; Kirik, F; Koytak, A; ÖZDEMİR, MEHMET HAKAN; ELBAY, AHMET; KIRIK, FURKAN; EKİNCİ, CANSU; KOYTAK, İBRAHİM ARİFPublication Metadata only Ileri yaş olgularda Goldmann aplanasyon ve dinamik kontur tonometre ile ölçülen göz içi basıncı ve santral kornea kalınlığı ilişkisi(2011-10-09) UMURHAN AKKAN, JÜLİDE CANAN; KOYTAK, İBRAHİM ARİF; OZSUTCU, MUSTAFA; ARAS, CENGİZ; UMURHAN AKKAN, JÜLİDE CANAN; KOYTAK, İBRAHİM ARİFPublication Metadata only Long-term results of deep anterior lamellar keratoplasty for the treatment of keratoconus.(2011-05-01T00:00:00Z) KUBALOGLU, A; SARI, ES; ÜNAL, MUSTAFA; Koytak, A; KURNAZ, E; ÇINAR, Y; OZERTURK, Y; ÜNAL, MUSTAFA; KOYTAK, İBRAHİM ARİFPublication Open Access In vivo generated autologous plasmin assisted vitrectomy in young patients(2022-06-01T00:00:00Z) Aras, Cengiz; Senturk, Fevzi; Koytak, Arif; Dogramaci, Mahmut; Erdur, Sevil Karaman; Kocabora, Selim; KOYTAK, İBRAHİM ARİFBackground Autologous plasmin enzyme facilitates the induction of posterior vitreous detachment(PVD) during vitrectomy in young patients. We proposed the concept of in-vivo generated plasmin which is based on the injection of tissue plasminogen activator(t-PA) and autologous whole blood(AWB) into the vitreous cavity. The purpose of this pilot study is to report the efficacy of preoperative simultaneous intravitreal injection of(t-PA) and autologous whole blood in facilitating the intraoperative induction of PVD in young patients with various vitreoretinal pathologies. Methods Seventeen eyes of 16 young patients with various vitreoretinal pathologies requiring vitrectomy, who received simultaneous intravitreal injection of 0.1 ml of AWB and 25 mu g of t-PA, 3 days prior to surgery were retrospectively reviewed. Outcome measures were the number of attempts required to achieve successful intraoperative separation of the posterior hyaloid; the postoperative visual acuity; and intraoperative and postoperative complications. Results The mean age of the patients was 23.87 +/- 10.09 years, ranging from 10 to 39 years. Eight of 16 patients were men. The mean follow-up time was 19.35 +/- 5.04 months, ranging from 12 to 26 months. Surgical indications for vitrectomy were chronic retinal detachment (n = 7), traumatic retinal detachment without proliferative vitreoretinopathy(n = 3), traumatic macular hole(n = 1), secondary vasoproliferative tumor(n = 4) and optic pit maculopathy(n = 2). Patients with retinal detachment complicated with PVR and those who were older than 40 years of age were excluded from the study. Separation of the Weiss ring from the optic nerve head was achieved intraoperatively in all cases, with a mean number of 2.86 +/- 1.4 attempts. While the mean preoperative LogMAR visual acuity was 1.38 +/- 0.59, ranging from 2.40 to 0.50, it was a mean of 0.51 +/- 0.29, ranging from 1.00 to 0.10 at final postoperative exam(p < 0.001; paired samples t-test). No preoperative or intraoperative complications were noted. Conclusion Preoperative simultaneous intravitreal injection of 25 mu g t-PA with 0.1 ml of AWB facilitates the intraoperative induction of posterior vitreous detachment in young patients.