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Biomedical subjects

P Larricart

Publications and source records attributed to P Larricart.

At least 19 recordsLinked to original sources
PubMed1998

[Relaxing retinopathies and liquid perfluorocarbons].

PURPOSE: To assess the long term anatomic and functional follow-up of large relaxing retinotomies performed with liquid perfluorocarbon in severe vitreoretinal proliferation surgery. METHODS: A large relaxing retinotomy (more than 90 degrees) was realized in 40 eyes of 39 patients for anterior vitreoretinal proliferation (30 rhegmatogen retinal detachments, 8 intraocular foreign bodies, 2 ocular traumas). Follow-up was always longer than 6 months. Vitreoretinal proliferation secondary to ischemic or inflammatory retinopathy were excluded. The liquid perfluorocarbon was perfluorodecalin and was used for all eyes, as well as final intraocular tamponade by silicon oil ended every intervention. RESULTS: Sixty-seven % of patients had already had a former vitrectomy, and 75% a retinal surgery. Mean size retinectomy was 170 degrees. Nine patients underwent a new vitreoretinal procedure which included in 7 cases a necessary new retinectomy. Silicon oil could be removed in 55%, after a mean period of 6, 5 months. Mean time follow-up was 13 months. At the end of follow-up, 80% of retina were attached. Visual acuity remained low with 25% equal to 1/20 or more; 45% of eyes increased their acuity, 25% remained stable and 30% worsened. Main complications were epimacular proliferation, keratopathy and increased intraocular pressure. CONCLUSION: Relaxing retinotomies provide satisfying anatomic results and allow a preservation of some visual function. The use of liquid perfluorocarbons facilitates their realization. The initial size of retinectomy should be sufficient.

Adolescent↗
PubMed1994

[The danger of the game called "paint ball"].

Severe ocular injuries may occur during a new war game in France, called "paint ball". A high pressure carbon dioxide powered gun fires pellets filled with dye. The pellet is coated with a semisoft gelatin and filled with a "nontoxic" dye mixture. We observed six consecutive cases during a ten month-period. In two cases (both due to a shot at point-blank range), mature cataract occurred. Consequently, lensectomy was achieved, preceded by a prophylactic scleral buckle. In one case, a retinal detachment due to a localized retinal necrosis occurred. With endocular surgery and temporary silicone oil tamponade, we achieved retinal reattachment. The three remaining cases did not require surgery. They suffered blunt ocular lesions of the anterior and/or posterior segment. One of these cases showed permanent tattooing to the cornea. After a mean follow-up lasting six months, all patients had, at least, a 40/100 vision. Some recommendations can reduce the incidence and the severity of ocular injuries due to paint balling. Firstly, eyeguards (made of polycarbonate) must be worn before receiving guns and pellets. Secondly, a kind of safety gun stopper can avoid gun firing by accident apart from practices. Thirdly, according to others publications, alcohol or drugs should not be consumed before the game. Lastly, gun fire at point-blank range or toward the head must be forbidden. We hope that wide distribution of such recommendations will help reducing the frequency of this type of ocular traumas.

Adolescent↗
PubMed1993

[Liquid perfluorocarbons in the surgical treatment of retinal detachment caused by retinal inversion].

Surgical procedures used today to treat retinal detachment with an inverted giant retinal tear have considerably improved. Vitrectomy associated with perfluorocarbon liquid injection has replaced old procedures necessary to unfold the inverted retinal flap. Seventeen patients were operated on with an anatomic success rate of 76% and an average follow up of fifteen months. The successive surgical stages (lensectomy, retinopexy, internal tamponade, circular scleral buckle) are discussed. Proliferative vitreoretinopathy is the maill postoperative complication explaining the high rate of reoperation (56%). In high myopia, a prophylactic circular scleral buckle of the fellow eye has become systematic.

Adolescent↗
PubMed1993

[Prevention of non-traumatic retinal detachment by surgical cerclage. Apropos of 20 cases].

Prophylactic retinal detachment with laser photocoagulation is ineffective for some vitreo-retinopathies in which vitreous traction is predominant (non traumatic giant retinal tears, Wagner Stickler's syndrome, Marfan's syndrome...). Twenty eyes were operated by prophylactic episcleral circular buckling. In eighteen cases, the fellow eyes had previously presented a retinal detachment. We performed two types of encircling buckle. We only observed minor operative complications, without any functional consequences, attesting to the innocuity of this type of treatment. But we have to wait for vitreous detachment to know the efficacy of this prophylactic treatment. This detachment occurs at different time in each vitreoretinopathy, but with a specific rate of retinal detachment for each pathology.

Adolescent↗
PubMed1992

In vitro laser decomposition of silicone fluid used in detachment of the retina.

The in vitro exposure of the silicone fluid Dimethicone 1,000 to radiation from the Nd:YAG laser results in the formation of transient breakdown gases which are composed mainly of methane, ethylene and traces of ethane, as identified by head-space gas chromatography. These hydrocarbons may interfere with the intra-ocular environment in the management of retinal detachment.

Chromatography, Gas↗
PubMed1989

Study of a new series of large relaxing retinotomies.

Silicone oil injection followed by retinotomy was performed in a second series of 37 patients with retinal detachment and advanced proliferative vitreoretinopathy. The retina posteriorly to the retinotomy was attached in 16 eyes with at least 18 months of follow-up. Ambulatory vision or better vision was restored in 12 eyes. The size and the site of the retinotomy depend on the size and the site of the retraction.

Adolescent↗
PubMed1988

[Results of early removal of intra-ocular silicone after vitreoretinal surgery].

Report of the anatomic results of early silicone oil removal in 23 eyes successfully treated by vitrectomy and silicone oil injection after membrane peeling. After cicatrization of retinopexy using panretinal photocoagulation, the silicone oil was removed. The retina remained attached in 87% of cases. The utility of laser retinopexy before silicone oil ablation is discussed.

Adult↗
PubMed1987

A new method for the evacuation of aqueous humor in uncontrolled glaucoma. The vitreo-tenonian tube.

The vitreo-tenonian tube is a new procedure, used in uncontrolled glaucoma, for the drainage of aqueous humor. It presents three original characteristics: it is made of a stainless metal, it is implanted in the posterior segment after vitrectomy and it drains the aqueous humor in the subtenonian space. We will describe first the surgical technique for the implantation of the tube, and then we will present the results of the first eight cases treated by this method. The advantages and drawbacks of this type of drainage are discussed: they are compared with the other surgical techniques used in cases of glaucoma which is uncontrolled by the classical methods.

Aqueous Humor↗
PubMed1987

Gas tamponade as a single technique in the treatment of retinal detachment: is vitrectomy needed? A comparative study of 120 cases.

Internal gas tamponade is employed with no episcleral buckle and can be combined with or without a vitrectomy for the surgical treatment of some forms of retinal detachment. These techniques are for forms of retinal detachment with no proliferative vitreoretinopathy that are being operated upon for the first time and have one or several breaks located on the superior half of the retina. We compare these two techniques, their anatomical results, and their complications.

Cataract↗
PubMed1987

[Treatment by internal tamponade of retinal detachment with a macular hole].

The authors analyse the operative results of 92 cases of retinal detachment with macular hole, treated by internal tamponade, since 1976. Three technics were used: vitrectomy + silicone oil injection (75 cases), vitrectomy + SF6 gas injection (9 cases), intra-ocular liquid suction + SF6 gas injection (8 cases). Silicone vitrectomy is particularly advisable in the case of large, old retinal detachment with proliferative vitreoretinopathy. This form of treatment is imperative when there is no hope of a satisfactory postoperative positioning, or after an unsuccessful gas treatment due to epiretinal macular membrane. Suction gas is a new and simple technique which is recommended when the macular hole is isolated and without epiretinal membranes. A lattice pattern argon-laser retinopexy is performed, by means of a series of laser impacts at the posterior pole, up to the edge of the macular hole. Treatment of isolated macular holes in a flexible retina by silicone vitrectomy achieved a 78.5% success rate; suction + gas achieved a similar success rate; this last method appears to be the ideal first choice for most of the cases, i-c the two failures which were subsequently turned into successes by silicone vitrectomy.

Evaluation Studies as Topic↗
PubMed1986

Study of the first hundred phakic eyes treated by peripheral iridotomy using the N.D. Yag laser.

Performing a peripheral iridotomy with a ND Yag laser is a simple and efficient technique, with no side effects, no need for anaesthesia other than local and no surgical opening of the eye, with all the risks it entails. Out of 100 cases, 100% were a success from a technical point of view, and we observed no lesion of the lens which could have caused cataract. This out-patient technique, causing fewer complications than with Argon laser, can be used on any patient, whatever the age and the state of the angle, who has to be treated by peripheral iridotomy. The Neodymium Yag laser (ND: Yag) is a pulsed solid laser (1, 2, 3, 8, 29, 31). It cuts tissues (photodisruption) by means of a shock-wave produced by optical breakdown (plasma formation). Its effect is different from that of the Argon laser which burns tissues (photocoagulation). The present study, of 100 cases, deals with the use of ND: Yag in peripheral iridotomies.

Adult↗
PubMed1986

Circular subtotal retinectomy and inferior semicircular retinotomy. Material and results in 38 cases.

Anatomical and functional results in 38 eyes with retinal detachment and major proliferative vitreoretinopathy (C3, D1, D2) treated by more or less wide retinotomy or circular retinectomy; 50% of the retinae have reattached, with an improvement of the visual function in 12 cases out of 21. The best procedure in these cases seems to be a retinotomy of at least 180 degrees on an eye filled with silicone oil to prevent secondary retractions. Circular retinectomy has been given up for retinotomy.

Adolescent↗