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[Color Doppler imaging analysis of ocular hemodynamics in low-tension glaucoma]. 1997

J Fu, and Y Liang, and Y Zhang
Department of Ultrasound, People's Hospital, Beijing Medical University.

OBJECTIVE To investigate ocular hemodynamics with color Doppler imaging, in low-tension glaucoma. METHODS Nineteen patients with low-tension glaucoma (LTG) and 15 normal subjects were studied. The peak systolic velocity (Vmax), the end diastolic velocity (Vmin), the mean-enveloped velocity (Vmean), the pulse index (PI), the resistance index (RI) and S/D (Vmax/Vmin) of the ophthalmic artery (OA), the short posterior ciliary arteries (SPCA) and the central retinal artery (CRA) were compared in the two groups. RESULTS (1) Compared with the normal subjects, the patients with LTG showed a decreased Vmax and Vmin in SPCA in bilateral eyes and Vmean in the right eye (P < 0.05), and a decreased RI and S/D in the left eye (P < 0.05). (2) Vmax and Vmean of CRA in LTG were lower than that in normal subjects (P < 0.01). (3) All six blood flow parameters of OA in the two groups were not significantly different from each other. CONCLUSIONS Blood flow velocity of SPCA in LTG was lower than that in the normal subjects. The results support the theory that LTG is induced by the perfusion impairment of optic nerve head.

UI MeSH Term Description Entries
D007429 Intraocular Pressure The pressure of the fluids in the eye. Ocular Tension,Intraocular Pressures,Ocular Tensions,Pressure, Intraocular,Pressures, Intraocular,Tension, Ocular,Tensions, Ocular
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009880 Ophthalmic Artery Artery originating from the internal carotid artery and distributing to the eye, orbit and adjacent facial structures. Arteries, Ophthalmic,Artery, Ophthalmic,Ophthalmic Arteries
D012161 Retinal Artery Central retinal artery and its branches. It arises from the ophthalmic artery, pierces the optic nerve and runs through its center, enters the eye through the porus opticus and branches to supply the retina. Central Retinal Artery,Arteries, Central Retinal,Arteries, Retinal,Artery, Central Retinal,Artery, Retinal,Central Retinal Arteries,Retinal Arteries,Retinal Arteries, Central,Retinal Artery, Central
D001783 Blood Flow Velocity A value equal to the total volume flow divided by the cross-sectional area of the vascular bed. Blood Flow Velocities,Flow Velocities, Blood,Flow Velocity, Blood,Velocities, Blood Flow,Velocity, Blood Flow
D005260 Female Females
D005901 Glaucoma An ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. The consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (Dictionary of Visual Science, 4th ed) Glaucomas
D006439 Hemodynamics The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM. Hemodynamic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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