ABSTRACT
The definition of postoperative hypotony should be based on intraocular pressure (<5 mmHg) but should also take into account the associated anatomical risk, risk factors as well as the mechanisms involved, which vary depending on whether the anterior or posterior segment is concerned (presence or absence of the Seidel sign, primary or secondary ciliary body and choroidal detachment, etc.). The course to follow is based on evaluating the urgency of the situation so as to provide an adapted response. The choice and delay of the therapeutic response depends on the degree of inflammation of the bleb, the degree of athalamia (3 stages), and the aspect of the posterior pole. In case one or the other chosen technique fails (simple surveillance, bandage, protective eye shield, contact lens, laser, etc.), surgical revision of the operative site may be necessary. The anterior chamber must be reinflated using viscoelastic in certain situations. Much rarer is the need for intervention on the posterior pole after UBM, B ultrasound, and gonioscopy. Cases of severe and delayed secondary hypotonia with conjunctiva-scleral necrosis require rapid reoperation.
Subject(s)
Filtering Surgery , Glaucoma/surgery , Hypotension/therapy , Postoperative Complications/therapy , Humans , Intraocular Pressure , Treatment FailureABSTRACT
The venous network of the pars plana was studied by means of arterial and venous injections of India ink and neoprene latex. The vascular lumens were measured under the microscope. The analysis of samples spread on slides allowed us to discover the existence of a venous anastomotic arch in the ora serrata region.
Subject(s)
Carbon , Choroid/blood supply , Ciliary Body/blood supply , Coloring Agents , Humans , Iris/blood supply , Microscopy, Electron, Scanning , Middle Aged , Neoprene , Resins, Synthetic , Staining and Labeling , Uvea/blood supply , Veins/anatomy & histologyABSTRACT
An original study evaluated choroidal capillary bed filling by analyzing results of angiographic examinations in 102 diabetic patients. Delayed filling of some localized choroidal capillary zones was noted in 46.88 p. cent of cases, widespread ischemic areas in the middle choroidal region being rarely observed (2.94 p. cent of cases). Optical microscopy examination after Indian Ink injection in the choroids showed vascular anomalies, microaneurysms, and obliterated zones similar to the retinal changes of diabetic patients.
