Substantiation of a New Method for Diagnosing Ciliary Body Microcirculatory Ischemia by Determining a Decreased Level of Diastolic Perfusion Pressure in its Metarterioles

Resumo

Abstract—The ability to diagnose ciliary body microcirculatory ischemia by determining a decreased (below 35.0 mm Hg) level of diastolic ocular perfusion pressure in its metarterioles was theoretically substantiated. This corresponds to the level of an increase in the intraocular pressure induced by local vacuum compression of the eye, during which a decrease in the amplitude of the blood filling pulse fluctuations is registered rheographically. According to the utility model, by applying a perilimbal vacuum-compression ring of original construction (pat. UA 112192) with rheographic electrodes mounted in the base, the diastolic ocular perfusion pressure is determined only in arterioles included in the regional system of the ciliary body microcirculation. The aqueous secretion and outflow of moisture briefly proportionally decreases with the preservation of an unchanged eye volume. The calculation of the level of the increase in the intraocular pressure by the degree of the applied vacuum VAC and the eye diameter D is carried out according to the formula \(K\frac{{VAC}}{{{{D}^{4}}}}\), where the coefficient K is determined by the size of a particular vacuum-compression ring.