Ophthalmodynamography and ophthalmodynamometry in neurological practice

Reversed ophthalmic Doppler signal: a study of its significance

The pathophysiological significance in carotid artery stenoses of a collateral circulation via the external carotid and ophthalmic arteries is investigated with the use of three non-invasive techniques: Doppler ultrasonography, ophthalmodynamometry and ophthalmodynamography . 21 Carotid arteries with and 26 without a stenosis greater than 50% at angiography are studied. Finding a reversed flow direction in the ophthalmic artery points towards a low pressure in the carotid syphon and indicates that the patient is, hemodynamically speaking, in danger. This concerns the cerebral as well as the retinal circulation.

Non-invasive diagnosis of carotid stenoses: results of some methods of investigation

In this paper the results are presented of four 'first-generation' non-invasive methods of diagnosing carotid stenosis. They are given in the form of ROC curves, showing the dynamic relationship between their sensitivity and specificity. For the interpretation of the combined results of different methods the consecutive application of the rule of Bayes is used. Proceeding from an estimated pre-test probability of 40%, a post-test probability of the disease can be calculated. This depends on a particular combination of positive or negative test results and can range from highly probable to (99%) extremely improbable (1%).