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Biomedical subjects

A Urrets-Zavalia

Publications and source records attributed to A Urrets-Zavalia.

15 recordsLinked to original sources
PubMed1980

V-z vs z-plasty.

Explore the source record for details and available documents.

Ectropion↗
PubMed1980

Retinal surgery under the microscope.

In the case of small breaks, the operating microscope and slit lamp are of great help in retinal detachment surgery. The use of an adequate peripheral fundus contact lens is necessary. The technique to be followed is described and its advantages and disadvantages are discussed.

Contact Lenses↗
PubMed1977

Management of keratoplasty in the early stages.

Frequent, if not daily, slit-lamp examination of the patient with a penetrating transplant is indicating for more than one reason: it will lead to the early detection of any defect of the host-graft junction or of the graft's posterior surface; it will permit an early diagnosis of the peripheral cornea-iris touch syndrome with all its potential consequences (acute, irreversible mydriasis, iris atrophy, and now and then secondary glaucoma); it will give an exact clue to when to remove the continuous sutures long after these have been covered by epithelium; and it will alert the surgeon in the event of a localised infection. Early and late opacification of the graft will also be correctly appraised, so that the surgeon will know when to wait and when to take the appropriate action.

Cornea↗
PubMed1977

The insufflation of freon in vitreoretinal surgery.

Among the various gases recommended for intravitreal injection, sulfur hexafluoride (SF6) and octafluorocyclobutane (C4F8) are the most commonly used. The purpose of the injection is to restore the vitreous chamber after drainage of subretinal fluid or after vitrectomy. Some of the fluorinated hydrocarbons which belong to the group known as Freon (a registered trademark) have previously been used in the animal with the same end in view. Of these, Freon-12 and Freon-114 were selected on account of their physical properties, the fact that they remain in the vitreous cavity for 4-14 days, their availability and their innocuousness, and used in humans as an adjunct to vitreoretinal surgery. The results are compared to those obtained with other halogenated gases.

Animals↗
PubMedDate not supplied

[Current treatment of simple retinal detachment. Advantages and inconveniences of permanent and temporary scleral buckling compared with gas expansion of the retina].

Limited cryopexy followed by attachment to the sclera of a small, cylindrical silicone sponge at the site of the tear leads in most cases to a prompt reduction of any non-complicated rhegmatogenous detachment. As a rule, no drainage of the subretinal fluid is necessary. If an inflatable silicone balloon is used in lieu of a permanent tampon, the short-term result may be the same; renewed tension of the vitreous bands which caused the tear may lead, however, to a redetachment in the long term. Intravitreal injection of an insoluble gas (mostly perfluoro-propane or hexafluorure ) may also be used to close up the tear, while cryopexy or photocoagulation are to be applied to seal its borders. After resorption of the gas the vitreous bands will again be under tension, and the risk of a recurrence appear. The fact that the vitreous chamber must be entered entails, on the other hand, some risks of its own.

Catheterization↗