Biomedical subjects

C F Mahl

Publications and source records attributed to C F Mahl.

8 recordsLinked to original sources

PubMed1994

External argon laser choroidotomy versus needle drainage technique in primary scleral buckle procedures. A prospective randomized study.

PURPOSE: To compare the rates of intraoperative and postoperative complications of external argon laser choroidotomy and needle drainage techniques during scleral buckle procedures for primary retinal detachment. METHODS: A group of 175 patients undergoing scleral buckling for primary retinal detachment was randomly assigned to undergo either external argon laser choroidotomy or needle drainage. Complications associated with drainage of subretinal fluid were categorized as retinal break, retinal incarceration, or hemorrhage (dot, < or = 1 disc diameter [DD], or > 1 DD), and recorded during surgery and 24 hours after surgery. RESULTS: In the group that underwent laser choroidotomy, 12 (13%) of 92 patients had complications, including 4 dot hemorrhages, 3 hemorrhages 1 DD or smaller, 3 hemorrhages larger than 1 DD, 1 retinal incarceration, and 1 suprachoroidal hemorrhage. In the group that underwent needle drainage, 13 (16%) of 81 patients had complications, including 3 dot hemorrhages, 4 hemorrhages 1 DD or smaller, 5 hemorrhages larger than 1 DD, and 1 suprachoroidal hemorrhage. No significant difference was noted between the two groups in the incidence of complications (P = 0.657). CONCLUSION: External argon laser choroidotomy and needle choroidotomy are comparable, safe, and effective ways to drain subretinal fluid during scleral buckle surgery.

Body Fluids↗

PubMed1993

Choroidal malignant melanoma.

Choroidal nevi are found on routine fundus evaluations in 1% to 2% of patients. It is felt that these usually benign lesions are the precursors of choroidal malignant melanomas. The incidence of choroidal malignant melanoma in the United States is approximately 6 cases per 1 million persons per year. Diagnosis is multifactorial, based on the tumor's funduscopic, angiographic, and ultrasonographic appearance. Once a melanoma is diagnosed in a patient, a complete metastatic workup is performed. A small tumor is observed for change. Medium-sized tumors are treated with radioactive plaque therapy, external beam radiation, or enucleation. Large tumors are treated with enucleation with or without external beam radiation. Studies are underway to establish the optimum form of treatment.

Choroid Neoplasms↗

PubMed1992

Lenticular burns following argon panretinal photocoagulation.

Photocoagulation burns of the crystalline lens are a rare complication of posterior segment laser surgery. These burns occur more commonly in eyes with cataracts and with small, high-power, long-duration argon blue-green burns. We describe the first occurrence of lenticular burns caused by a fractured laser fibre optic cord.

Diabetic Retinopathy↗

PubMed1992

Oculocutaneous manifestations observed in multisystem disorders.

Patients with multisystem disorders frequently present with or eventually manifest cutaneous disease. Many of these patients will also manifest ocular changes. In these disorders, the dermatologist or ophthalmologist may act as primary provider or consultant. Thus, familiarity with these conditions will enable the specialist to provide better care for these patients. This article reviews the oculocutaneous manifestations of sarcoidosis, Behçet's disease, Reiter's syndrome, and Sjögren's syndrome.

Arthritis, Reactive↗

PubMed1991

Photocoagulation for serous detachment of the macula secondary to retinal astrocytoma.

Retinal astrocytomas are rare, usually asymptomatic, hamartomatous retinal tumors that are most commonly seen in patients with tuberous sclerosis. Serous detachment of the macula is a rare complication of retinal astrocytomas. The first successful treatment with laser photocoagulation of two eyes (two patients) with decreased vision due to a serous detachment of the macula from a retinal astrocytoma is described. Laser photocoagulation should be considered for retinal astrocytomas causing persistent or increasing exudation that is threatening the macula or causing visual loss.

Adolescent↗

PubMed1980

Lacrimal outflow patency demonstrated by chemiluminescence.

A chemiluminescent material (Cyalume) was injected into the lacrimal excretory passages of eight normal monkeys (16 eyes). Patency was established by almost instantaneous observation of a yellowish-green glow in the nose and pharynx. No toxic effects of the chemical were noted in any of the monkeys.

Animals↗

PubMedDate not supplied

Retinal detachment and retinal holes in retinitis pigmentosa sine pigmento.

Retinal detachment and retinal holes in two family members with retinitis pigmentosa sine pigmento are reported. We believe these are the first such cases reported in the literature. We describe the presenting symptoms and management, including cryotherapy, scleral buckling procedure, and sulfur hexafluoride injection (SF6), resulting in stable visual acuity in one case and retinal reattachment and improved visual acuity in the other case.

Adult↗

PubMedDate not supplied

Pars plana vitrectomy for subfoveal macular hemorrhage and choroidal neovascular membranes.

1. Choroidal neovascular membranes (CNVM), the abnormal ingrowth of blood vessels from the choroid through Bruch's membrane, remain a major cause of treatable visual loss. 2. Laser photocoagulation is effective in destroying CNVM and preserving central vision in many affected patients. However, laser treatment of subfoveal CNVM irreversibly destroys foveal vision. 3. The utility of vitrectomy techniques for removal of subfoveal macular hemorrhage on CNVM remains unknown pending the results of a randomized, controlled prospective study. 4. Laser photocoagulation remains the treatment of choice for extra- and juxtafoveal CNVM caused by age-related macular degeneration (ARMD), ocular histoplasmosis and idiopathic causes, and for selected subfoveal CNVM caused by ARMD.

Choroid Diseases↗