Ophthalmodynamography and ophthalmodynamometry in neurological practice

Abstract

Inventarisation of atraumatic methods of analysing the circulation in the carotid region shows that they generally can be classified as physiological or anatomical. Physiological methods focus on blood circulation time or on the pulsating changes in blood pressure, blood velocity, blood vessel diameter and cerebral volume. In this study the reliability of two pressure-dependent methods, namely ophthalmodynamography and ophthalmodynamometry, for the detection of haemodynamically significant carotid stenosis is established. Correct results were found in 78--82% of cases. Ophthalmodynamography, and the advantage of combining this method with ophthalmodynamometry, are more extensively investigated. Although in recent years attention has been focussed on the study of the blood velocity pulsations with the Doppler technique, maximal diagnostic efficacy can be expected from a combination of pressure and flow wave studies. A way to compare all the information contained in the curves can be found in the technique of Fourier analysis. The results obtained by Fourier analysis of the ophthalmodynamographic curves are presented.

Oculo-Oscillo-Dynamography: A Diagnostic Procedure for Recording Ocular Pulses and Measuring Retinal and Ciliary Arterial Blood Pressures

“…What is thus measured under normal cir culatory conditions is the blood pressure of the internal carotid artery at the origin of the ophthalmic artery; in cases of occlusion of the internal carotid artery where the flow in the ophthalmic artery is reversed it is the blood pressure of the main collateral vessel of the external carotid artery [Bettelheim, 1966;Ulrich, 1976;Strik, 1980], Of the methods measuring the ocular pulse (such as oculoplethysmography [Bu nin and Zhadanow, 1964;Brockenbrough et al, 1967]; oculosphygmography [Bynke and Krakau, 1964]; dynamic tonometry [Horven, 1968]; graphic analysis of the ocular pulse Galin et al [1972]; pneumatonography [Langham, 1974] only Gee's procedure to determine systolic o.a.p. has been used clinically in angiology and vascular surgery [Gee, 1978;Eickelboom, 1981].…”

Criteria for the evaluation of non-invasive testing for carotid artery stenosis

“…Frequently, however, a scale of values is to be obtained and then the question is less simply answered. The difficulty can be demonstrated using our results obtained in ophthalmodynamography (ODG) and ophthalmodynamometry (ODM) (Strik, 1980). ODG and ODM study pulsatile changes in blood pressure in the carotid area.…”