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BAYRAKTAR, HAVVANUR

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Now showing 1 - 4 of 4
  • PublicationMetadata only
    Acute Phototoxic Retinopathy due to Infrared Heater
    (2020-09-01T00:00:00Z) Kırık, Furkan; Çevik, Neslihan; Bayraktar, Havvanur; Özdemir, Mehmet Hakan; KIRIK, FURKAN; BAYRAKTAR, HAVVANUR; ÖZDEMİR, MEHMET HAKAN
  • PublicationOpen Access
    Autologous Platelet-Rich Fibrin in the Treatment of Refractory Macular Holes
    (2019-11-06T00:00:00Z) Koytak, Arif; NUHOĞLU, FADİME; BAYRAKTAR, HAVVANUR; Ercan, Rukiye; Ozdemir, Hakan; KOYTAK, İBRAHİM ARİF; NUHOĞLU, FADİME; BAYRAKTAR, HAVVANUR; ERCAN, RUKIYE; ÖZDEMİR, MEHMET HAKAN
    Purpose. To describe a novel method for the treatment of refractory macular holes. Methods. Two case reports on the use of autologous platelet rich fibrin (PRF), followed by sulfur hexafluoride gas tamponade to facilitate closure of refractory macular holes. Results. Macular holes were succesfully closed within a week in both cases. Best corrected Snellen visual acuities improved from counting fingers to 0.16 in the first case, and from 0.05 to 0.2 in the second case. No complication occurred during or a er the procedures. Conclusion. e use of autologous PRF seems to be a safe and effective alternative method for the treatment of refractory macular holes. Further experience and studies are required to assess the value of autologous PRF in the management of challenging macular hole cases of different etiologies. To the best of our knowledge, this is the first use of autologous PRF in the treatment of macular holes.
  • PublicationMetadata only
    Regional analysis of segmented-macular structure in patients with myopic anisometropia
    (2021-06-01T00:00:00Z) KIRIK, FURKAN; EKİNCİ, CANSU; AKBULUT, ERSİN; BAYRAKTAR, HAVVANUR; Ozdemir, Hakan; KIRIK, FURKAN; EKİNCİ, CANSU; AKBULUT, ERSİN; BAYRAKTAR, HAVVANUR; ÖZDEMİR, MEHMET HAKAN
    Purpose To compare intraretinal layers between the eyes in patients with myopic anisometropia, and evaluate the relationship between the layers with spherical equivalent (SE) and axial length (AL). Methods In this retrospective study, the more myopic (MM) and fellow (F) eyes of 41 patients with myopic anisometropia, and 38 emmetropic (+/- 0.50 diopter) control (C) eyes were inclueded. Intraretinal layer segmentation was performed by optical coherence tomography. Global volumes of retinal layers and their thicknesses in nine macular regions were compared. Correlation analysis was used to determine the relationship with SE and AL in each layer. Results Total retinal, ganglion cell (GCL), inner nuclear (INL), and outer plexiform (OPL) layer volumes in MM eyes were less than in C eyes, while INL and OPL were less than in F eyes. There was no difference in the fovea, except for the retinal pigment epithelium. In MM eyes, only INL and OPL were thin in at least one perifoveal and parafoveal quadrant compared to F eyes. Only INL and OPL thicknesses were significantly correlated with both SE and AL in all perifoveal quadrants. In contrast to the thinning found in MM eyes, the only layer in which thickening was detected to compare to C eye was nerve fiber layer (NFL), which correlated positively with SE and negatively with AL. Conclusion While the fovea is less affected by myopia, thinning becomes remarkable in the perifoveal quadrants. Despite thinning in many layers, especially INL and OPL, NFL thickening may be seen due to myopia.
  • PublicationMetadata only
    A novel tool reflecting the role of oxidative stress in the cataracts: thiol/disulfide homeostasis
    (2017-01-01) Elbay, AHMET; Ozer, Omer Faruk; ALTINISIK, Muhammed; ELBAY, Arif Emre; Sezer, TAHA; Bayraktar, HAVVANUR; OZDEMIR, Hakan; ELBAY, AHMET; ÖZER, ÖMER FARUK; SEZER, TAHA; BAYRAKTAR, HAVVANUR; ÖZDEMİR, MEHMET HAKAN
    We investigated serum and aqueous humor thiol/disulfide (T-D) homeostasis in patients with cataracts versus healthy controls. In total, 56 patients with cataracts and 49 healthy controls were enrolled in this case-control study. Serum total thiol (TT), native thiol (NT), and disulfide (DS) concentrations were determined using a novel automated measurement method. Additionally, DS/TT, DS/NT and NT/TT percentage ratios were compared between the groups. In comparison with the control group, serum NT levels and aqueous humor TT and NT levels were significantly lower (p<.05, p<.05 and p<.001, respectively), whereas serum and aqueous humor DS levels were significantly higher in cataract patients (p<.01 and p<.001). DS/TT and DS/NT ratios were significantly higher and the NT/TT ratio was lower in cataract patients in serum (p<.005) and aqueous humor samples (p<.001). In conclusion, serum T-D homeostasis may be useful as biochemical markers, indicating the role of oxidative stress in the development of cataracts. Further studies are needed to confirm the pathophysiological role of T-D homeostasis in cataractogenesis.