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Biomedical subjects

H Buettner

Publications and source records attributed to H Buettner.

52 records · Page 3Linked to original sources
PubMed1980

Massive vitreous hemorrhage and senile macular choroidal degeneration.

In the elderly patient with a massive vitreous hemorrhage in one eye and senile macular choroidal degenerative changes in the fellow eye, a hemorrhagic disciform detachment causing this massive vitreous hemorrhage must be considered in the differential diagnosis. Ultrasonography selectively combined with radioactive phosphorus (32P) testing differentiates between a hemorrhagic disciform detachment or disciform scar and a malignant melanoma of the choroid. The ultrasonographic findings of a hemorrhagic disciform detachment may vary, but usually the posterior pole lesion is relatively flat and broad-based with a fairly homogeneous pattern without choroidal excavation. Posterior polar lesions secondary to senile macular choroidal degeneration do not grow. The vitreous hemorrhage clears in about three fourths of the patients, eventually allowing visualization of the posterior pole and ophthalmoscopic confirmation of a disciform scar. Almost one half of the eyes may be expected to lose all light perception because of the development of an initially hemorrhagic retinal detachment.

Age Factors↗
PubMed1979

Patient data displaying attachment for the Bronson-Turner ophthalmic contact B-scan ultrasonoscope.

A numerical light-emitting diode data displaying attachment designed for the Bronson-Turner Ophthalmic Contact B-Scan Ultrasonoscope provides the following information: patient's identification number, date of the examination, eye examined, position of the transducer probe, and decibel setting. The light-emitting diodes are placed over the upper border of the display screen and appear automatically on all photographs of the ultrasonic display.

Data Display↗
PubMed1979

What patients recall of the preoperative discussion after retinal detachment surgery.

We conducted a prospective study to determine the percentage of preoperative information that was retained by 100 patients undergoing a scleral buckling procedure. Each patient received a standardized preoperative discussion regarding the nature of retinal detachment and its management. During the immediate postoperative period, each patient was questioned about the informed consent discussion. Although 97% of the patients acknowledged a thorough preoperative discussion there was a definite disparity between the patients' concept of adequate physician disclosure and the actual retention of the preoperative explanation. Overall retention of preoperative disclosure based on correct answers to 12 questions was only 57%. Few patients, 23%, retained knowledge of surgical risks, and only 61% remembered that a foreign material would be permanently sutured to the eye. When a patient failed to remember the correct answer to a question, more than half of the time he or she denied that information relevant to the question had been discussed. The results of this study indicate that patients retain primarily information that seems to be in favor of their decision to have surgery.

Adolescent↗
PubMed1979

Uveitis and cerebral reticulum-cell sarcoma (large-cell lymphoma). Case report.

A patient with a peculiarly refractoy uveitis and vitritis was later found to have an infiltrative mass lesion of the posterior portion of the corpus callosum. The histopathological diagnosis of reticulum-cell sarcoma (large-cell lymphoma) was made after study of vitreous tissue obtained by pars plana vitrectomy of the right eye. Intraocular involvement with cerebral reticulum-cell sarcoma has been reported previously.

Aged↗
PubMed1978

Acute macular neuroretinopathy.

A 17-year-old boy had minor visual impairment, paracentral scotomata, and parafoveal retinal lesions following a presumed viral infection. Contact lens biomicroscopy demonstrated the retinal defects to be located at the level of the deep sensory retina. Fluorescein angiography revealed subtle areas of hypofluorescence which corresponded to the visible disturbances of the sensory retina. Follow-up examination three months later revealed persistent complaints of paracentral scotomata and persistent, but less recognizable retinal lesions. We believe the primary site of involvement to be the deep sensory retina.

Acute Disease↗
PubMed1977

Histopathologic findings in human eyes after pars plana vitrectomy and lensectomy.

Six eyes, four obtained at autopsy and two enucleated for neovascular glaucoma, were studied histopathologically between one week and 3 1/2 years after pars plana vitrectomy (some combined with lensectomy) for proliferative diabetic retinopathy. Fibrovascular proliferation at the sclerotomy site was minimal. Lensectomy through the pars plana proved to be quite complete. A cyclitic membrane was found in eyes with postoperative rubeosis irides. Excision of the vitreous from the posterior part of the vitreous cavity was quite complete except for remnants of stalks and membranes on the retinal surface.

Cataract Extraction↗
PubMed1977

Pigmented preretinal membranes.

Continuous growth and an increase in pigmentation of a preretinal membrane occurred in a 46-year-old woman after a scleral buckling procedure for rhegmatogenous retinal detachment. Ten additional patients had pigmented preretinal membranes in eyes treated for rhegmatogenous retinal detachment. Although we made no attempts to determine the incidence of pigmented preretinal membrane formation in eyes with retinal detachments, these 11 cases, in a consecutive series of 500 eyes treated for rhegmatogenous retinal detachment, indicated that the development of pigmented preretinal membranes is not uncommon. Our clinical observations supported recent experimental findings implicating retinal pigment epithelial cells as a cause of preretinal membrane formation.

Female↗
PubMed1975

Congenital hypertrophy of the retinal pigment epithelium.

The flat, circumscribed, and hyperpigmented lesion of the retinal pigment epithelium (RPE) without clinically apparent involvement of the overlying retina, designated as congenital hypertrophy, was found to be associated with corresponding scotomas in the visual field. The depth of the scotoma increased with the age of the patient. These lesions did not grow. They could be readily differentiated from other pigmented fundus lesions on the basis of their typical clinical appearance. Histopathology revealed a single layer of hypertrophied cells, containing numerous large pigment granules, and degeneration of photoreceptor cells overlying the area of abnormal RPE. The clinical as well as the histologic findings suggested that the retinal abnormality overlying the hypertrophied RPE was due to secondary degeneration rather than primary maldevelopment of photoreceptor cells.

Adolescent↗
PubMedDate not supplied

Scanning electron-microscopic study of Silastic scleral sponges.

Scanning electron microscopy was used to study seven Silastic scleral sponges removed between 2 days and 12 years after episcleral implantation. The sponges did not undergo structural changes. Early after implantation, erythrocytes and fibrin and, later, scant fibroblasts were seen on the surface and within the superficial interstices of the sponges. The interstices throughout the sponges contained an amorphous material of unknown composition. These findings support clinical experience that the silicone elastomer of silastic scleral sponges is chemically inert, structurally durable, and well-suited for scleral buckling procedures.

Adolescent↗