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Biomedical subjects

A I Ivashina

Publications and source records attributed to A I Ivashina.

13 recordsLinked to original sources
PubMedDate not supplied

[A new method of duplex ultrasonic examination of the state of blood supply to the ciliary body].

Duplex ultrasonic scanning was used to examine blood supply to the ciliary body. The study helped quantitatively assess the ciliary body hemodynamics. The hemodynamic parameters in diseases of the anterior segment of the eye (cataracts, glaucoma, corneal dystrophy, etc.) significantly differed from the norm: pulsative index 2.32 vs. the normal value of 1.57, systolic/diastolic ratio 7.29 vs. 6.23, the peak systolic rate 12.59 cm/sec vs. 34.36 cm/sec, maximal rate 6.56 cm/sec vs. 14.36 cm/sec, mean rate 4.0 cm/sec vs. 8.76 cm/ces, volumic rate 1.47 ml/min vs. 3.66 ml/min. The examinations helped detect early disorders in the blood supply to the ciliary body. New ultrasonic equipment: Quantascope (Vital Science, England) and DRF-1000 (Piasonics, USA) was used, that proved highly informative and reliable.

Adolescent↗
PubMedDate not supplied

[Dynamics of changes in the thickness of the choroid in patients with stenosis of the internal carotid artery].

Thirty-five patients suffering from atherosclerosis with carotid artery stenosis of varying severity have been examined. The thickness of the choroid has been paramacularly measured by the ultrasonic methods. The studies have revealed a significant decrease of the choroid thickness in both eyes of patients with bilateral hemodynamically significant stenoses of the carotid arteries and with bilateral stenoses on the point of occlusion. Of the 12 patients with hemodynamically insignificant stenoses, the choroid thickness has reduced only in 3. Surgical treatment (vascular restoration operations on the carotid arteries) has resulted in recovery of the choroid thickness in all the patients. This has lead the authors to a conclusion that isolated measurements of the choroid thickness in patients with impaired arterial extracranial blood stream cannot serve the diagnostic ophthalmologic test for the detection of patients with carotid insufficiency, but such measurements carried out by ultrasonic techniques, combined with other functional ophthalmologic methods, give valuable information on the time course of changes in the eyeball blood content.

Aged↗
PubMedDate not supplied

[Computed tomography in the Multidisciplinary Science and Technology Complex "Eye Microsurgery"].

The paper is devoted to analysis of the results of CT in 1000 patients examined in the Multibranch Research and Technology Complex "Eye Microsurgery". The specific feature of CT in this institution is that 52% of all investigations of ophthalmological patients fall to the share of eyeball abnormality and 40%--to a study of the other parts of the organ of vision. CT indications are extended for low tension glaucoma, complicated high myopia, and for monitoring the position of microsurgical implants. The use of CT in such a highly specialized medical institution as the MRTC "Eye Microsurgery" is considered indispensable.

Eye Diseases↗
PubMedDate not supplied

[Digital image processing methods for analyzing endothelial cells].

The authors describe a new method for studies of endothelial cells using a specialized image-processing computer. This method makes possible analysis of the endotheliocyte square diameter, perimeter, etc., and helps estimate the type of the cell injury after opticoreconstructive and refraction surgery.

Adolescent↗