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Biomedical subjects

A D Semenov

Publications and source records attributed to A D Semenov.

At least 19 recordsLinked to original sources
PubMed1990

[The morphological changes in the eye tissues of rabbits in transconjunctival-scleral cyclocoagulation by the radiation of a krypton laser operating continuously].

The paper describes a morphologic picture of changes in eye tissues of rabbits in transconjunctival scleral action on the ciliary body by means of krypton laser (wavelength--647.1 nm) working in a continuous regime. The applications were located 1.0-1.5 mm from the limbus with energy--0.8--3.0 Wt, exposition time--2.0 sec., spot diameter--1000 mcm. The degree of necrosis of ciliary epithelium and atrophy of ciliary processes are directly dependent on the dose of action. Thus, the greatest part of laser radiation with 647.1 nm wavelength is absorbed at the level of the ciliary body. In perspective, this can lead to development of new methods for treatment of some eye diseases, such as glaucoma, tumors of the uveal tract, etc.

Animals↗
PubMedDate not supplied

[Results of fluorescence angiography of the iris in surgical treatment of recurrent anterior uveitis].

Seventeen patients (17 eyes) with anterior recurrent uveitis, aged 18 to 58, were examined by fluorescent iris angiography before and after surgery, extracapsular cataract extraction with vitrectomy. The findings evidence disordered microcirculation in the iris in anterior recurrent uveitis. The severity of the micro-circulatory shifts depended on the disease standing and the period elapsed since the last uveitis recurrence. Surgical treatment of the condition promoted recovery of the iris angioarchitectonics and the time parameters of the vascular system microcirculation.

Adolescent↗
PubMedDate not supplied

[Fluorescent angiographic and rheographic evaluation of the ocular hemodynamics in patients with proliferative diabetic retinopathy after closed vitrectomy].

Rheo-ophthalmography has been employed in examinations of the hemodynamics in 42 patients with proliferative diabetic retinopathy, aged 21 to 78; in 16 of these patients with sufficiently transparent media the fundus oculi has been examined by fluorescent angiography. The examinations have revealed an impaired hemodynamic balance, manifesting by a low rheographic coefficient (1.55 +/- 0.12%) and a considerably longer time of the venous circulation (18.8 +/- 0.5 s). Vitrectomy not only removes neovascularization, proliferates, and changed vitreous, but also normalizes the hemodynamic parameters at the expense of shortening the venous system and removing the venous congestion.

Adult↗