Bioelectrical activity of the retina after vitrectomy for vitreomacular traction syndrome

Abstract

Purpose. According to the electrophysiological examination, a comparative analysis of the dynamics of electrogenesis of the retina after vitrectomy with vitreomacular traction syndrome.Material and methods. 59 patients (59 eyes) with vitreomacular traction syndrome underwent electrophysiological examination before the operation and on the 1st, 3rd, 7th, 14th, 30th, 60th, 180th day after vitrectomy. Three groups of patients are formed depending on the type of tamponade of the vitreous chamber: I - air tamponade, II - gas tamponade, III - tamponade with balanced salt solution.Results. Significant inhibition of the electrogenesis of photoreceptors and bipolar cells on the 1st day after surgery compared with baseline data in groups I, II and III (p <0.05) was revealed. In group I, II, III, the normalization of all electrophysiological indicators is noted by the end of the observation period. In group II, the electrophysiological indicators are restored 2 times slower compared with group I and III, due to the inhibitory effects of perfluoropropane of the gas tamponade. In group II, and III, electrogenesis of photoreceptors is restored 2 times faster than bipolar cells level.Conclusion. 1. Vitrectomy causes a significant reversible inhibition of the bioelectrical activity of the retina. The duration of vitrectomy is a significant negative factor determining the degree of depression of the bioelectrical activity of the retina in the postop. 2. The gas tamponade with perfluoropropane of the vitreous chamber, compared with air and balanced salt solution, is a significant negative factor affecting the degree of inhibition of the bioelectrical activity of the retina after surgery. 3. Vitreomacular traction syndrome is characterized by a reliable inhibition of the retinal cone system bioelectrical activity

Keywords

• vitreomacular traction syndrome
• vitrectomy
• electroretinogram