title: Reproducibility of transcranial Doppler ultrasound examinations of the ophthalmic artery flow velocity.
abstract: Transcranial Doppler ultrasound measurements of ophthalmic artery velocity were made on 88 patients predominantly suffering from glaucoma. Of the four observed parameters, peak velocity, mean-enveloped velocity, diastolic velocity, and resistivity index, the latter was found to be the most reproducible (CV = 5.2%). The variability between patients was approximately twice that of the variability between consecutive measurements. Measurement error appeared to decrease as the operator gained experience.
authors.affiliation: Department of Ophthalmology and Epidemiology, Faculty of Medicine, and University Hospital, University of British Columbia, Vancouver, Canada.
authors.forename: P
authors.initials: P
authors.lastname: Rojanapongpun
authors.forename: B
authors.initials: B
authors.lastname: Morrison
authors.forename: S M
authors.initials: SM
authors.lastname: Drance
mesh_terms: D001783:Blood Flow Velocity; D005901:Glaucoma / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging / Q000503:physiopathology*; D015203:Reproducibility of Results; D014463:Ultrasonography