Biomedical subjects
Publications and source records attributed to E G Gamm.
Results of the investigation of the oxyhaemoglobin content in the blood of the anterior ciliary veins in 23 patients with primary glaucoma and in 4 patients with senile cataract are presented. An extremely high content of oxyhaemoglobin in the anterior ciliary veins was revealed in all patients irrespective of the level of the intraocular pressure and the stage of the disease.
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Courses of transcutaneous electrostimulation of the visual analyzer periphery according to E. B. Kompaneets were administered to 31 children (56 eyes) aged 4 to 12 because of low vision acuity after congenital cataract extraction. The amplitude of stimulating pulses was from 150 to 400 microA. The first course consisted of 5-8 sessions, repeated courses of 4 sessions. The results were assessed by vision acuity check-ups and recordings of visual [correction of auditory] evoked potentials (AEP). Vision acuity improved from 0.1 to 0.9 after a course of treatment. AEP amplitude was reduced in all the patients to 15.4 microV on an average, the time of the pulse conduction in the auditory system was normal (113.2 ms). Electrostimulation effects on the AEP were negligible. Electrostimulation may be recommended to children with low vision acuity and low values of the AEP amplitude after congenital cataract extraction.
The examinations have involved 62 subjects (116 eyes), of these 48 ones with open-angle glaucoma and 14 with suspected glaucoma. Vacuum compression of the eye with simultaneous recording of the visual evoked potentials (electroencephalodynamography) has been carried out. The studies have revealed increased, vs. the initial level, latent period and decreased amplitude of evoked potentials during the eye compression in 74% of patients with primary glaucoma and in 69% of subjects with suspected glaucoma. These results permit recommending electroencephalodynamography for the early diagnosis and prognosis of glaucoma.
Visual evoked potentials have been recorded in 95 patients with cataracts (60 with senile cataracts and 35 with traumatic ones). No visual evoked potentials could be recorded in 23 patients, 14 of these suffering from glaucomas (primary or secondary). The absence of visual evoked potentials indicates that optico-reconstructive surgery is hopeless.
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