Eye Haemodynamics in Idiopathic Macular Hole Surgery Using Various Types of Vitreous Endotamponade
The paper studied ocular blood flow in 40 patients with idiopathic macular hole (MH) before and after surgery using various types of vitreous cavity tamponade. Color Doppler mapping and pulsed Doppler sonography were used to examine the hemodynamics in the vessels of the eyeball and the retrobulbar space. Morpho-functional status of the macula was assessed by optical coherence tomography and microperimetry. 25 Ga pars plana vitrectomy with internal limiting membrane peeling was performed in the 1st group (20 patients) using gas tamponade and the 2 nd group (20 patients) - silicone oil tamponade. Dynamic examinations were performed 1 and 3 months after vitrectomy. Before surgery, hemodynamic parameters in the ophthalmic artery and posterior ciliary arteries were impaired. A significant increase of blood flow velocity was found in the ophthalmic artery after vitrectomy. A more pronounced impairment of blood flow in the posterior ciliary artery was noted both in the affected and the fellow eye of patients with the basal diameter of MH of over 800 μm. // Russian Ophthalmological Journal, 2014; 2:57-61.