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Biomedical subjects

M Ullern

Publications and source records attributed to M Ullern.

54 records · Page 3Linked to original sources
PubMed1980

Complications of intraocular injections of silicone combined with vitrectomy.

Observation with long follow-up of the first 200 cases of intraocular injection of silicone combined with vitrectomy led us to discover three major complications: cataract, keratopathy and hypertonia, the last two found only in aphakic eyes. No toxic action of silicone could be proved to explain these complications. They seem to be related to physical properties of the silicone which we use, and in particular its gravity lower than one. This density is responsible for noxious mechanical phenomena. They can be partially kept back by preserving the lens in the first stages, avoiding segmentary iridectomy in aphakic eyes, nocturnal procubitus position and silicone ablation in failed cases.

Aphakia↗
PubMed1980

[Surgical treatment of retinal detachment with macular holes by vitrectomy and silicone oil injections (author's transl)].

A total of 18 patients with retinal detachment from macular holes were treated by intra-ocular injections of silicone oil after vitrectomy. Successful reapplication was obtained in all cases operated upon by primary intention (12 out of 12). This procedure has the advantage of not requiring coagulation around the hole, as employed by other methods, thus avoiding enlargement of the central scotoma.

Aged↗
PubMedDate not supplied

[Cost of managing cataracts. Evaluation of traditional hospitalization and ambulatory surgery].

OBJECTIVE: Demonstrate eventual differences and evaluate the medical costs of treatment of a cataract in traditional hospitalisation and out-patient surgical conditions. METHODS: We conducted a study of minimisation costs in 3 ophthalmologic hospital departments. This retrospective study randomly selected the medical files of 250 patients (100 operated in the out-patient surgical department and 150 operated in traditional surgical conditions). Costs were evaluated on direct hospital costs, according to the standard costs method and the method of true costs. RESULTS: The mean total cost of a cataract is of 10,984 F in traditional hospital conditions and of 7,683 F in out-patient surgical conditions. DISCUSSION: In terms of direct hospital costs, treatment of cataracts in out-patient surgery appears more economic compared with traditional surgery. The difference in cost concerned the fixed hospital charges (structures and staff). CONCLUSION: Out-patient surgery will progress in France in the next few years, but traditional hospitalisation will still be required in ophthalmologic practice.

Ambulatory Surgical Procedures↗
PubMedDate not supplied

[Complications of Stableflex anterior chamber intraocular lens implants. Apropos of 150 cases].

Stableflex (ORC) is a PMMA anterior chamber intraocular lens with closed and flexible loops permitting the philosophy of "one size fits all" in 90% of the eyes. Late complications lead to marketing interruption in the USA in July 1987. In a review of 150 cases, we study the occurrence of complications: corneal decompensation (4.5%), iridocorneal angle modification, cystoid macular edema (6.7%), explantation (n = 6). These observations suggest implications of physiopathological mechanisms which are examined.

Aged↗
PubMedDate not supplied

[Macular imaging with optical coherence tomography].

PURPOSE: Optical Coherence Tomography (OCT) is a novel noninvasive and noncontact imaging technique providing cross-sectional representations of the eye structures. OCT is analogous to Ultrasound B-scan, except that it analyzes the reflection of a 850 nm light wave. The aim of this study was to assess the potential of ocular coherence tomography for diagnosing and monitoring macular diseases. METHODS: Cross-sectional images were performed with the Zeiss-Humphrey OCT. Over one year period, we examined approximately 300 patients with idiopathic full thickness macular hole, lamellar hole, cystoid macular edema, choroidal new vessels, epiretinal membrane, diabetic maculopathy, and central serous chorioretinopathy. RESULTS: OCT can provide new information concerning the posterior pole diseases mentioned above. OCT can also be useful in thickness measurements. CONCLUSION: OCT allows tomographic analysis of macular diseases. The information obtained is different from that obtained by histologic study which is sometimes hard to interprete. OCT is mostly useful in studying internal layers of the retina. Further applications may be developed.

Choroid Diseases↗