Microvascular blood flow velocities measured with a retinal function imager: inter-eye correlations in healthy controls and an exploration in multiple sclerosis  

作　　者：Liang Wang Ohemaa Kwakyi James Nguyen Esther Ogbuokiri Olwen Murphy Natalia Gonzalez Caldito Laura Balcer Elliot Frohman Teresa Frohman Peter A.Calabresi Shiv Saidha 

机构地区：[1]Department of Neurology,Johns Hopkins University School of Medicine,Baltimore,MD,USA [2]Departments of Neurology,Population Health and Ophthalmology,New York University School of Medicine,New York,NY,USA [3]Departments of Neurology and Ophthalmology,University of Texas Austin Dell Medical School,Austin,TX,USA

出　　处：《Eye and Vision》2018年第1期260-268,共9页眼视光学杂志（英文）

基　　金：funded by the National MS Society(RG-1606-08768 to SS),R01NS082347(PAC);the Walters Foundation(to EF).

摘　　要：Background:The retinal microcirculation has been studied in various diseases including multiple sclerosis(MS).However,inter-eye correlations and potential differences of the retinal blood flow velocity(BFV)remain largely unstudied but may be important in guiding eye selection as well as the design and interpretation of studies assessing or utilizing retinal BFV.The primary aim of this study was to determine inter-eye correlations in BFVs in healthy controls(HCs).Since prior studies raise the possibility of reduced BFV in MS eyes,a secondary aim was to compare retinal BFVs between MS eyes,grouped based on optic neuritis(ON)history and HC eyes.Methods:Macular arteriole and venule BFVs were determined using a retinal function imager(RFI)in both eyes of 20 HCs.One eye from a total of 38 MS patients comprising 13 eyes with ON(MSON)and 25 eyes without ON(MSNON)history were similarly imaged with RFI.Results:OD(right)and OS(left)BFVs were not significantly different in arterioles(OD:3.95±0.59 mm/s;OS:4.08±0.60 mm/s,P=0.10)or venules(OD:3.11±0.46 mm/s;OS:3.23±0.52 mm/s,P=0.06)in HCs.Very strong inter-eye correlations were also found between arteriolar(r=0.84,P<0.001)and venular(r=0.87,P<0.001)BFVs in HCs.Arteriolar(3.48±0.88 mm/s)and venular(2.75±0.53 mm/s)BFVs in MSNON eyes were significantly lower than in HC eyes(P=0.009 and P=0.005,respectively).Similarly,arteriolar(3.59±0.69 mm/s)and venular(2.80±0.45 mm/s)BFVs in MSON eyes were also significantly lower than in HC eyes(P=0.046 and P=0.048,respectively).Arteriolar and venular BFVs in MSON and MSNON eyes did not differ from each other(P=0.42 and P=0.48,respectively).Conclusions:Inter-eye arteriolar and venular BFVs do not differ significantly in HCs and are strongly correlated.Our findings support prior observations that arteriolar and venular BFVs may be reduced in MS eyes.Moreover,this seems to be the case in both MS eyes with and without a history of ON,raising the possibility of global blood flow alterations in MS.Future larger studies are needed to assess d

关 键 词：Inter-eye correlation Blood flow velocity Retinal function imager NEUROLOGY Multiple sclerosis Optic neuropathy 

分 类 号：R57[医药卫生—消化系统]