Orbital colour doppler imaging

Abstract

Colour Doppler imaging (CDI) is an ultrasonic method for qualitatively and quantitatively assessing blood flow. Recently this technique has been adapted for investigation of the orbital, optic nerve and ocular vasculature. We discuss the history, principles and methodology of this examination technique for ophthalmology. Also described are normal haemodynamic characteristics as well as the findings in common pathological states involving derangements of orbital blood flow. Although CDI is relatively new to ophthalmology it has already proved to be of benefit in conditions with altered orbital, ocular and optic nerve blood flow. In the future it is expected that the indications for the applications of CDI will become more clearly defined and that orbital CDI will be more widely available and utilised, especially in the investigation of vascular diseases of the orbit, optic nerve and retina.

Doppler measurement of blood flow velocities in extraocular orbital vessels in patients with obstructive sleep apnea syndrome

“…This in turn permits deductions to be made about blood flow to the eye through the ophthalmic artery (OA), the central retinal artery (CRA), and the posterior ciliary arteries (PCAs). [8][9][10] In this prospective study, we aimed to compare findings on CDUS among patients with OSAS with those of control subjects without OSAS to assess the effects of OSAS on vessels supplying the eye.…”

Arterial blood flow characteristics in central retinal vein occlusion and effects of panretinal photocoagulation treatment: an investigation by colour Doppler imaging

“…Colour Doppler imaging is a noninvasive, reproducible, and easily applied technique that is shown to be useful in evaluating haemodynamic changes in several orbital and retinal vascular diseases. [16][17][18][19] Materials and methods Thirty three patients with CRVO of 3 months' duration or less were enrolled into the study group. Fifteen of the patients with CRVO were female and 18 were male.…”

Duplex sonography of retro-orbital and carotid arteries in patients with normal-tension glaucoma

“…The ophthalmic artery (OA), CRA, and temporal (TPCA) and nasal short posterior ciliary artery (NPCA) were examined following a standard protocol, as described previously. [17][18][19] When more than 1 short PCA could be visualized, the velocity was measured in the longest one. We traced the OA nasally from the optic nerve after their crossing.…”