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Biomedical subjects

F U Huamonte

Publications and source records attributed to F U Huamonte.

16 recordsLinked to original sources
PubMed1983

Comparative electroretinograms in argon laser and xenon arc panretinal photocoagulation.

We performed electroretinograms (ERG) on both eyes of 11 diabetic patients before and one month after panretinal photocoagulation for diabetic retinopathy. Each patient had one eye treated with argon laser and the fellow eye treated with the xenon arc photocoagulator. After photocoagulation the ERG was symmetrically reduced unless the retinal area burned with xenon arc was greater than twice the retinal area burned in the fellow eye by the argon laser photocoagulator.

Adult↗
PubMed1981

Lens holder and modified contact lens for pars plana vitrectomy.

A sustained-grip, pressure-release, cross-action forceps was developed to obtain firm and steady holding of the contact lens during vitrectomy surgery. For use in conjunction with the forceps, a plano-concave fundus contact lens has been modified by having a circular groove cut around it.

Contact Lenses↗
PubMed1980

Spontaneous separation of epiretinal membranes.

Three patients had spontaneous separation of an epiretinal membrane from the macular region. Two of the patients had had argon laser photocoagulation of peripheral retinal lesions three to four months earlier. Vitreous contraction, which had led to the fundus conditions that required photocoagulation, may have created alterations in the vitreous or in the membrane itself, which enhanced the peeling of the membranes. Although photocoagulation may sometimes worsen macular puckers, the presence of an epiretinal membrane near the macula should not be considered an absolute contraindication to peripheral fundus photocoagulation when the pathologic process that is to be coagulated has a substantially worse prognosis if left untreated.

Adult↗
PubMed1980

Macular lesions in blacks with the presumed ocular histoplasmosis syndrome.

Six black patients had fundus lesions diagnostic of the presumed ocular histoplasmosis syndrome. All patients had peripapillary changes or peripheral punched-out chorioretinal lesions, or both. Five of the six had macular subretinal neovascularization, disciform scarring, or an atrophic macular lesion, and one patient had a macular hole; four of five patients tested had a positive histoplasmin skin test. The macular involvement was bilateral in three of the six cases. HLA B-7 was present in one of four patients who had HLA typing. Macular involvement can occur in blacks with the presumed ocular histoplasmosis syndrome.

Adolescent↗
PubMed1979

PHPV in an adult managed by vitrectomy.

Pars plana vitrectomy requiring a two-instrument technique successfully cleared the pupillary axis of dense persistent hyperplastic primary vitreous in a 29-year-old patient. To find PHPV in an adult eye with vision is so unusual that distinguishing it from the ocular sequelae of traumatic injury can be challenging. Hyperplastic primary vitreous persists with a wide variety of clinical features in both anterior and posterior segments of the eye.

Adult↗
PubMed1978

Four hundred consecutive pars plana vitrectomies with the vitrophage.

We performed 400 consecutive pars plana vitrectomies, using the vitrophage. Most patients (68%) showed some degree of visual improvement; only 8% had a decline in visual acuity postoperatively. The major operative complications were controllable bleeding from iris vessels and intravitreal stalks (19%) and retinal tears (2%). No retinal dialysis was noted. The major, early postoperative complications were related to corneal decompensation in 38% of the cases; this persisted beyond two weeks in only 7%. Increased intraocular pressure occurred in 19% and postoperative rubeosis iridis developed in 10% of the diabetic patients. Complications related to rebleeding occurred in 18% of the diabetic patients within the first two weeks, and an additional 9% had late rebleeding. Less frequent complications included one case of endophthalmitis, late retinal detachment in 5%, and phthisis bulbi in 2% of all cases. All complications were considerably more frequent and severe in the diabetic population.

Anesthesia, Local↗
PubMed1976

Elevation of intraocular pressure after pars plana vitrectomy.

To determine the incidence and causes of increased intraocular pressure (IOP) after pars plana vitrectomy with the vitrophage, we studied 118 eyes under-going vitrectomy during a one-year period. Fifty-one (43%) were in diabetic patients; 67 (57%) were in nondiabetics. Of the entire group, 33 (28%) developed a postoperative increase in IOP, which was defined as a rise in IOP of at least 10 mm Hg above the preoperative level by applanation tonometry. Of the diabetic eyes 25 (49%) developed increased IOP; 11 (22%) of these eyes required surgical intervention for control of IOP. Of the nondiabetic eyes eight (12%) developed increased IOP postoperatively; all were either transiently elevated or medically controllable. Postoperative rubeosis iridis occurred only in diabetic eyes.

Adolescent↗
PubMed1976

One hundred consecutive pars plana vitrectomies using the vitrophage.

One hundred consecutive eyes underwent vitrectomy with the disposable vitrophage via a pars plana approach. Eyes were divided into two main categories based on opacity location-in the anterior or posterior segment. Patients with posterior segment opacities had diabetic retinopathy, nondiabetic vitreous hemorrhages, retinal detachments associated with vitreous hemorrhage, bands, or membranes, and intraocular foreign bodies or silicone oil. Patients with anterior segment opacities were treated for pupillary membranes resulting from surgical trauma or perforating injuries, and for complications following cataract extraction, such as capsule breakage and vitreous loss. Postoperatively, visual acuity improved in 68% of eyes with posterior segment opacities and in 85% of eyes with anterior segment opacities. Overall, visual acuity was 20/300 or better in 45% of eyes. There were only two intraoperative retinal tears and one postoperative rhegmatogenous retinal detachment.

Anemia, Sickle Cell↗
PubMed1976

Vitrectomy in 125 eyes with diabetic vitreous haemorrhage.

A total of 125 consecutive eyes, all registered blind with diabetic vitreous haemorrhage, underwent pars plana vitrectomy with the vitrophage. Sixty-six per cent experienced some improvement in their visual acuity; 24 per cent were unchanged and 10 per cent were worse postoperatively. The major surgical complication was controllable haemorrhage (23 per cent). No retinal dialysis occurred. Significant postoperative complications were transient (71 per cent) and persistent (11 per cent) corneal oedema, early (8 per cent) and late (13 per cent) vitreous haemorrhage, transient (30 per cent) and persistent (6 per cent) rise in intraocular pressure, and rubeosis iridis (5 per cent).

Diabetes Complications↗
PubMed1976

Immediate fundus complications after retinal scatter photocoagulation. I. Clinical picture and pathogenesis.

Fifty diabetics with severe background retinopathy or early proliferative retinopathy underwent retinal scatter photocoagulation with either the argon laser or the xenon arc photocoagulators. Choroidal detachment, exudative retinal detachment, shallowing of the anterior chamber, and secondary angle-closure glaucoma were observed. Exudative retinal detachment and choroidal detachment subsided in two days to 2-1/2 weeks. Glaucoma secondary to choroidal detachment with angle closure was observed in 11 eyes, three of which required medical treatment, although surgical therapy was not needed. This secondary glaucoma was detected in the first two days and subsided in subsequent days, with intraocular pressure reaching pretreatment values at the fifth day. No long-term sequelae were observed in these complications, except in one eye that developed macular edema that lasted for four months with decreased visual acuity; nevertheless, vision returned to the pretreatment level one year after photocoagulation.

Adult↗
PubMed1975

Vitreous scissors and forceps.

Vitreous scissors with bent blades and forceps of larger than usual dimension were developed for removal of inflexible membranes and intraocular foreign bodies.

Eye Foreign Bodies↗
PubMed1975

Management of traumatic retinal detachment with pars plana vitrectomy, scleral buckling, and gas injection.

Vitreous involvement as a result of penetrating trauma complicates and worsens the prognosis in retinal detachment repair. Seven patients in whom poor visualization of the fundus seemed to preclude success by routine procedures underwent combined vitrectomy, scleral buckling, release of subretinal fluid, and intravitreal gas injection. The retina was successfully reattached in five of the seven patients, although postoperative visual acuity was limited - possible on account of the duration of retinal detachment prior to repair or because of the degree of macular involvement.

Adolescent↗
PubMedDate not supplied

Reduction of immediate complications after panretinal photocoagulation.

With the use of either argon laser or xenon arc panretinal photocoagulation, 42 eyes with diabetic retinopathy were treated in two or more sessions at least 2 weeks apart. In the week following completion of photocoagulation, choroidal detachment was noted in 34 eyes (81%), shallowing of the anterior chamber in 16 eyes (38%), exudative retinal detachment in 5 eyes (12%), and increased intraocular pressure in 3 eyes (7%). These complication rates are lower than those reported in a similar series of 50 eyes in which panretinal photocoagulation was completed in 1-3 days.

Adult↗
PubMedDate not supplied

Pars plana vitrectomy. Vitrectomy treatment of vitreous opacities.

Twenty-one patients suffering from vitreous opacities caused by central- and branch-vein occlusion, sickle cell retinopathy, retinal vasculitis, endophthalmitis, hypertensive retinopathy, and uveitis underwent pars plana vitrectomy with the vitrophage. Intraoperative complications included retinal tears in two eyes with sickle cell retinopathy and tractional retinal detachment. Both were successfully treated. Postoperative complications were recurrent vitreous hemorrhage, hemolytic glaucoma, and corneal blood staining in a patient suffering from sickle cell retinopathy. Long-standing corneal edema was observed in patients suffering from endophthalmitis. Visual acuity improved in 95% of our patients and was worse in 5% of the patients.

Aged↗