[Comparative evaluation of blood flow velocity and pulsation curve in the posterior ciliary arteries supplying the choroid and the anterior part of the optic nerve].

The speed of the blood-flow and the indexes of pulsation in posterior ciliary arteries supplying the choroid and the anterior optic nerve segment were evaluated in 30 healthy persons (60 eyes) aged 20-60 years with intraocular pressure values of 15-20 mm Hg and in 60 persons with primary glaucoma (120 eyes) aged 22-76 years. The investigations were carried out by the method of Doppler focused pulsating ultrasonography, with an 8.0 MHz probe; the instrument used was the TC-2-64 produced by EME (Germany). It was established that the main speed of the blood-flow in the choroid vessels in healthy people is higher than in the arteries supplying the anterior segment of the optic nerve. These speeds are respectively: 15.13 +/- 4.3 cm/s and 12.03 +/- 3.0 cm/s. The difference is statistically significant. The index of pulsation in the posterior ciliary arteries of both vascular systems does not differ in a statistically significant way and amounts respectively: 0.68 +/- 0.13 and 0.71 +/- 0.11. In patients with glaucoma it comes much earlier to a decrease of the speed of the blood-flow and to an increase of the indexes of pulsation together with a raise of the IOP in the system of the choroidal posterior ciliary arteries than in the anterior segment of the visual system.