Pulsatile ocular blood flow: relationship with flow velocities in vessels supplying the retina and choroid

Background: Although ocular tonography measures a pulsatile component of the ocular perfusion, the retinal and/or choroidal components of this pulsatile flow remain undefined. Aim: To compare ocular tonography with the assessment of flow velocities in arteries supplying the retina, choroid and entir...

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Bibliographic Details
Published in:British journal of ophthalmology 2007-07, Vol.91 (7), p.882-884
Main Authors: Zion, Itay Ben, Harris, Alon, Siesky, Brent, Shulman, Shiri, McCranor, Lynne, Garzozi, Hanna J
Format: Article
Language:English
Subjects:
Adult
Biological and medical sciences
Blood
Blood Flow Velocity
CDI
central retinal artery
Choroid - blood supply
Ciliary Arteries - physiology
colour Doppler imaging
CRA
EDV
end diastolic velocity
Eye - blood supply
Female
Flow velocity
GAT
Glaucoma
Goldmann applanation tonometer
Humans
Hypoxia
intraocular pressure
Intraocular Pressure - physiology
IOP
Male
Medical sciences
Middle Aged
Miscellaneous
OBF
ocular blood flow
Ophthalmology
Optic nerve
Orbit - blood supply
peak systolic velocity
POBF
PSV
Pulsatile Flow
pulsatile ocular blood flow
Regional Blood Flow - physiology
Retinal Artery - physiology
Scientific Report
temporal short posterior ciliary artery
TSPCA
Ultrasonography, Doppler, Color
Veins & arteries
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Description
Summary:Background: Although ocular tonography measures a pulsatile component of the ocular perfusion, the retinal and/or choroidal components of this pulsatile flow remain undefined. Aim: To compare ocular tonography with the assessment of flow velocities in arteries supplying the retina, choroid and entire orbit. Methods: 22 normal eyes from 11 subjects were studied. Pulsatile ocular blood flow (POBF) was measured using the ocular blood flow tonograph, and flow velocities in the ophthalmic, central retinal (CRA) and temporal short posterior ciliary arteries (TSPCA) using colour Doppler imaging. The correlation between POBF and retrobulbar flow velocities was determined. Results: POBF correlated significantly with peak systolic velocity (PSV) of the CRA (r = 0.56, p = 0.007) and the TSPCA (r = 0.48, p = 0.02), and with the resistive index of the TSPCA (r = 0.45, p = 0.04). Additionally, pulse amplitude (PSV−end diastolic velocity) in the CRA and the TSPCA correlated significantly with POBF measurements (each p
ISSN:0007-1161
1468-2079
DOI:10.1136/bjo.2006.108340