Biomedical subjects

P O Barale

Publications and source records attributed to P O Barale.

4 recordsLinked to original sources

PubMed2006

[Heavy silicone oil as internal tamponade for retinal detachment: efficacy and tolerance].

INTRODUCTION: To evaluate the tolerance and efficacy of heavy silicone oil as internal tamponade for retinal detachment surgery. PATIENTS AND METHODS: Sixty-six eyes requiring heavy silicone oil for retinal detachment, with at least 1 month follow-up, were retrospectively studied. Preoperative status, surgical technique, tolerance, and anatomical and functional results were analyzed from the patient's file. Indications for heavy silicone injection were inferior retinotomy or inferior retraction in 65% of cases. PVR grade C was present in at least 63% of cases. Retinotomy was performed in 45% of cases. An exchange procedure was performed versus DKline in 65% of cases. Mean follow-up was 7 +/- 4 months. RESULTS: At the end of follow-up, 59% of eyes had a completely reattached retina, 32% without internal tamponade. Another surgery was necessary in 54% of cases. During follow-up, mean intraocular pressure was normal, and there was a significant intraocular inflammation in three cases (4.5%). In seven cases of the 44 ablations of heavy silicone oil, an adherence of residual bubbles was present. Redetachment occurred after ablation for anatomical success in 41% of cases. BCVA was better than 0.05 (20/400) in 54% of cases at the end of follow-up. CONCLUSION: Heavy silicone was well tolerated and seems not to be pro-inflammatory in our study. It is a good alternative to standard silicone for inferior retinotomy and inferior breaks without PVR. It is not a treatment of inferior retraction, and is not a long-term internal tamponade. During the ablation of heavy silicone oil, adherence of residual bubbles is possible, in which case a coaxial light or an endoillumination could be needed during ablation.

Adolescent↗

PubMed2004

[Hereditary retinal pathologies and AMD: new therapeutic perspectives].

This article summarizes our current knowledge on two types of retinal diseases: hereditary retinal degeneration and wet aged-related macular degeneration. Our understanding of retinal physiopathology in hereditary retinal degeneration and the successful experimental therapeutic results on animal models call for a new approach to these patients to prepare future clinical trials. Longitudinal follow-up of the functional alteration rhythm based on international standards and by expert centers is an essential prerequisite to including these patients in future clinical trials. Creating international databases that include data on follow-up using electrophysiological, psychophysical and morphological analyses would require standards defining how each of these procedures should be carried out. Furthermore, the relevance and value of the various examinations would then be evaluated in a longitudinal manner. The repeated use of these procedures in the various centers would bring to light any limitations these techniques may have for use in prospective studies. Continuous re-evaluation of these investigative techniques will therefore be necessary, a crucial factor in the preparation of multicenter clinical studies. The inclusion of patients phenotyped at different centers would require that certification procedures be set up for these centers. A great leap forward, clinical trials on new antiangiogenic approaches for the treatment of neovascular AMD are currently underway. The reasons for the switch between the neovascular and atrophic forms of AMD are as yet unknown, but these new approaches are based on the events that occur sequentially during the angiogenic response.

Clinical Trials as Topic↗

PubMed1996

[Surgical treatment by vitrectomy and autologous serum of 36 idiopathic macular holes].

PURPOSE: To analyse the surgical results of a second series of full thickness idiopathic macular hole operated with autologous serum as adjuvant therapy, and to compare them to the results of a first series without autologous serum and the results of literature. METHODS: In a series of thirty-six patients, autologous serum has been used as healing adjuvant therapy. The surgical procedure included a posterior and peripherical vitrectomy combined with posterior hyaloid separation, fluid-air exchange, autologous serum injection, and final flushing with 40% sulfur hexafluoride. The patients then maintained strict face-down position post-operatively for a minimum of ten days. RESULTS: Anatomic success was obtained in twenty-nine cases of thirty-six patients (80%), with an anatomic success rate of 100% for the stage 2 holes. Twenty-nine patients had a pre and postoperative measurable visual acuity. Among these twenty-nine patients, median postoperative visual acuity was 20/70, compared with 20/125 preoperatively. Final visual acuity was improved in twenty-seven patients (75%), was stable five times (14%), and declined four times (11%). Among the twenty-nine anatomic successes, twenty-four (85%) improved their visual acuity. Complications were rare, and observed in the same percentage as described in literature. No complication in relation to autologous serum was noticed. CONCLUSION: Autologous serum is an inexpensive, easy to obtain, healing adjuvant therapy. It seems improving the surgical results like the other adjuvants described in the litterature.

Adult↗

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↗