Author:
Chaturvedy Shiwani,Kori Neetu,Walia Shweta
Abstract
PURPOSE- To assess the blood flow velocity by color doppler imaging (CDI) of retrobulbar vessel in eyes with
primary open angle glaucoma ( POAG) . A prospective case control study was done on 40 new METHOD- ly
diagnosed POAG patients and 40 control patients with no clinical evidence of glaucoma. Color doppler imaging
was performed by ultrasound machine using linear high frequency probe. The color doppler window was
localized over the retrobulbar area and flow in the ophthalmic artery (OA) and central retinal artery (CRA)
identified, Peak systolic velocity (PSV) and End diastolic velocity (EDV) values for both the vessels were obtained.
Resistivity index (RI) was calculated as (PSV-EDV)/ PSV. The study sample consisted of 40 RESULT- patients in the
POAG group and 40 patients in the control group. All the patients with POAG had raised RI and decreased EDV
in both the OA and CRA. Also RI was raised in 45% patients with stable normal visual fields in POAG group. The
increase in IOP in POAG group was negatively correlated with PSV and EDV and positively correlated with RI
for both the OA and CRA. Despite normal visual fields, retrobulbar hemodynamic alterations CONCLUSIONcontribute to progression of glaucoma in early stage. Early diagnosis of glaucoma can be achieved by using CDIs of
ocular blood flow, which enable early intervention to prevent progressive irreversible vision loss.
Subject
Visual Arts and Performing Arts,Communication,Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Computer Science Applications,Mechanical Engineering,Transportation,Cardiology and Cardiovascular Medicine,Molecular Biology,Molecular Biology,Structural Biology,Catalysis,General Engineering,Physical and Theoretical Chemistry,Process Chemistry and Technology,Catalysis,Process Chemistry and Technology,Biochemistry,Bioengineering,Catalysis,Cell Biology,Genetics,Molecular Biology,General Medicine
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