Premium
Retinal perfusion changes in radiation retinopathy
Author(s) -
Rose Kalpana,
Krema Hatem,
Durairaj Priya,
Dangboon Wantanee,
Chavez Yael,
Kulasekara Susith I.,
Hudson Christopher
Publication year - 2018
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/aos.13797
Subject(s) - medicine , retinal , ophthalmology , retinopathy , oxygen saturation , retina , fluorescein angiography , diabetic retinopathy , perfusion , blood flow , optics , diabetes mellitus , oxygen , chemistry , physics , organic chemistry , endocrinology
Abstract Purpose To investigate retinal blood flow and oxygen saturation changes in patients diagnosed with retinopathy following plaque radiation treatment to treat choroidal melanoma. Methods Eight patients (mean age 55.75 years, SD 12.58 years) who have developed unilateral ischaemic radiation‐related retinopathy as confirmed by wide‐field fluorescein angiography were recruited for the study. The fellow eye with no other ocular or retinal pathology was used as control. Both eyes underwent measurement of total retinal blood flow ( TRBF ) and retinal blood oxygen saturation using prototype methodologies of Doppler Spectral Domain Optical Coherence Tomography (OCT) and Hyperspectral Retinal Camera, respectively. Results The average TRBF in the retinopathy eye was significantly lower compared to the fellow eye (33.48 ± 12.73 μ l/min versus 50.37 ± 15.26 μ l/min; p = 0.013). The arteriolar oxygen saturation (SaO 2 ) and venular oxygen saturation (SvO 2 ) were higher in the retinopathy eye compared to the fellow eye (101.11 ± 4.26%, versus 94.45 ± 5.79%; p = 0.008) and (62.96 ± 11.05% versus 51.24 ± 6.88%, p = 0.051), respectively. Conclusion The ionizing radiation seems to have an impact on the TRBF , SaO 2 and SvO 2 , clinically presenting similar to a rapidly developing diabetic retinopathy. The results show an altered retinal vascular physiology in patients with radiation‐related retinopathy.