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Biomedical subjects

J Haut

Publications and source records attributed to J Haut.

At least 109 records · Page 6Linked to original sources
PubMed1985

Circular subtotal retinectomy and inferior semicircular retinotomy: preliminary report.

Progress in the treatment of vitreoretinal proliferation has led ophthalmic surgeons to combine vitrectomy, peeling of the epiretinal membrane and silicone oil injection with surgery on the retina. The intervention consists either of a circular subtotal retinectomy leaving only the retina of the posterior pole and a retinal crown of two papillary diameters in width at the periphery of the temporal vessels; or, when the upper retina is already reapplied by silicone oil, of a semicircular lower retinotomy that suppresses the tractions against which the silicone oil is powerless. The sectioning is preceded by an endodiathermy that must be very precise, in order to avoid hemorrhages which are the major complication of the intervention. These preliminary studies will be followed by a detailed study when a larger number of cases is available.

Electrocoagulation↗
PubMed1985

Trabeculoperforation? Trabeculoretraction? Trabeculoplasty? Review of the various designations used for laser treatment in primary open-angle glaucoma.

A historical recall and an attempt to simplify the numerous terms used to designate laser treatments for primary open-angle glaucoma (POAG) are presented. There are two main types of laser treatment for POAG involving two entirely different procedures. The first one, contemporary with the beginning of laser photocoagulation, imitates the action of the scalpel, namely goniotomy ab interno or trabeculotomy ab externo. The goal of this early procedure was to produce a through and through trabecular hole but instead of the cutting edge of the knife, it uses the explosive effect of the laser. This procedure has been given numerous names. Among the most frequent ones, we find: 'laser trabeculopuncture', 'laseropuncture', 'goniopuncture', 'laser trabeculectomy', 'laser trabeculotomy', 'laser trabeculopexy'. We prefer to gather them under an explicit generic term: 'laser trabeculoperforation'. The results of this procedure have been very disappointing until now, particularly with conventional lasers, e.g. continuous-wave argon laser, owing to the predominance of their thermal effect over their explosive effect and also to the great scarring property of the trabecular meshwork. In the second type of glaucoma laser treatment, instead of trying to make a patent hole in the trabecular meshwork, the surgeon seeks to reshape the inner trabecular surface by means of argon laser microscars in order to produce a reversal of the trabecular collapse, which is now considered to be one of the major etiologies of POAG.(ABSTRACT TRUNCATED AT 250 WORDS)

Glaucoma, Open-Angle↗
PubMed1985

Some of the most important properties of silicone oil to explain its action.

The action of silicone oil is due especially to two of its properties: density and surface tension. Its density is less than 1: for this reason, the silicone oil bubble always presses upon the upper part of the eye, i.e. most of the time at twelve o'clock; so there is a constant support upwards which closes the tears and reattaches the retina. The action of silicone oil is different on the lower part of the eye, even if the cavity is filled with silicone oil: a buckle is then required. The surface tension being weak, a vitrectomy is necessary to obtain a single bubble which gives a higher pressure than several small bubbles. The cumulative effect of the density below 1 and the low surface tension explains that the recurrences always occur in the lower part of the retina. Retinotomies or retinectomies are presently trying to counteract this ineffectiveness of silicone oil.

Humans↗
PubMed1984

Localized retinectomy indications in the treatment and prevention of retinal detachment.

Retinectomy can be helpful in several cases: retinal inversion and giant tears when the edges are rolled up, and when vitreous strands are implanted on to pieces of the tear flaps; the approach to the subretinal area (subretinal glial strands, subretinal fluid drainage, subretinal foreign bodies); nondissectable areas of retinal retraction (retinal incarceration, vitreo-retinal proliferation, etc.). Most of these retinectomies have to be supplemented by vitrectomy followed by a silicone oil injection, with peroperatory cryotherapy or argon laser photocoagulation.

Cryosurgery↗
PubMed1984

Atrophies 'like flows' of the retinal pigment epithelium: a neuroepithelium-draining method of the posterior pole.

17 cases of eyes affected jointly by diseases of the posterior pole (central serous chorioretinopathy, serous detachment of pigmented epithelium, melanoma, osteoma, hemangioma) and flow-like atrophy of the pigmented epithelium, originating from the lesion and always directed downwards, are presented. It is likely that serous detachment of the neuroepithelium constituting the original wound (central serous chorioretinopathy) or the secondary one (serous detachment of the pigmented epithelium) of the posterior pole prolongs itself downwards, leaving a localized atrophy as a mark on the pigmented epithelium. The eventual draining role of serous detachment of the neuroepithelium by this 'flow' is disputed.

Adult↗