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Biomedical subjects

L S Halperin

Publications and source records attributed to L S Halperin.

15 recordsLinked to original sources
PubMed1993

The change in ulnar variance with grip.

The effect of grip on ulnar variance was evaluated in 66 symptom-free wrists of 53 volunteers. Zero-rotation posteroanterior x-ray films were taken of each wrist before and after exertion of a grip force measured with a Jamar dynamometer. The volunteers were randomly divided into two groups. Group I subjects (35 wrists) were asked to exert a constant grip force of 11.3 kg. Group II subjects (31 wrists) were asked to exert a maximum grip effort, which resulted in a mean grip force of 30 kg (range, 22.8 kg to 53.6 kg). Group I demonstrated a mean increase in ulnar variance of 1.27 mm and group II showed a mean increase of 1.95 mm. The minimum increase in ulnar variance observed was 0.25 mm. The changes observed were statistically significant. The results confirm that a relative increase in ulnar variance occurs with grip. There may be an etiologic role for daily activities that involve repetitive grip and forearm rotation in development of the ulnar impaction syndrome.

Adolescent↗
PubMed1993

Cystoid macular edema associated with topical echothiophate iodide.

We report the case of a patient with visual loss and cystoid macular edema that was associated with the topical use of echothiophate iodide. After cessation of the drops, the cystoid macular edema nearly disappeared, and vision returned to normal.

Administration, Topical↗
PubMed1990

Safety of fluorescein angiography during pregnancy.

We sent 424 retina specialists questionnaires on fluorescein angiography performed on pregnant women; 399 specialists responded. Of these, 309 (77%) had never performed fluorescein angiography on a pregnant woman. Ninety specialists (23%) had performed at least one fluorescein angiogram on a pregnant woman; detailed information was obtained on 105 patients. Authors of previous reports that included fluorescein angiography during pregnancy provided information about an additional 11 patients. Substantiated side effects were nausea or vomiting in seven patients. Anomalies at birth, an undescended testicle and syndactyly, were reported in two children. There was one stillbirth with pathologic findings classic for toxemia, and one fetal death occurred several months after fluorescein angiography. One therapeutic abortion was performed for complications in toxemia. One spontaneous abortion occurred three days after fluorescein angiography in a patient who was four weeks pregnant. Eight children born to toxemic mothers had low birth weights. We conclude that fluorescein angiography does not cause a high rate of birth anomalies or complications during pregnancy.

Abnormalities, Drug-Induced↗
PubMed1990

Syphilitic disc edema and periphlebitis.

This photo essay shows the retinal findings in a patient with presumed syphilitic disc edema and periphlebitis. Resolution of these findings after treatment with penicillin is documented by improvement in visual acuity from 20/50 to 20/25 in the right eye and from 20/200 to 2/20 in the left eye. Photographic documentation of the resolution of retinal findings, including disc edema and periphlebitis, is presented.

Fluorescein Angiography↗
PubMed1989

Choroidal neovascular membrane and other chorioretinal complications of acquired syphilis.

We reviewed ten patients who had posterior segment complications of acquired syphilis. Five of these patients had a neovascular membrane of the choroid associated with secondary or tertiary syphilis. Vision was stabilized after laser photocoagulation in one patient who had a choroidal neovascular membrane. Five additional patients had ocular manifestations including uveitis, optic neuritis, neuroretinitis, chorioretinitis, retinal hemorrhages, arterial and venous occlusion, vasculitis, and retinitis. Treatment of chorioretinal complications of syphilis with intravenous penicillin, if initiated early in the course of the disease, may result in excellent visual recovery.

Adult↗
PubMedDate not supplied

Fluorescein angiography--is it safe to use in a pregnant patient?

We sent questionnaires to 424 retina specialists in order to compile information on the use of fluorescein angiography in pregnant women. Four-hundred and three specialists responded. Of these, 313 (78%) had never performed fluorescein angiography on a pregnant woman. Ninety specialists (22%) had performed at least one fluorescein angiogram on a pregnant woman; detailed information was obtained on 105 patients. Authors of previous reports that included fluorescein angiography during pregnancy provided information on an additional 11 patients. Substantiated side effects were nausea and/or vomiting in seven patients. Anomalies at birth, an undescended testicle and syndactyly, were reported in two children. There was one stillbirth with pathologic findings classic for toxemia and one fetal death not related in time to fluorescein angiography. One therapeutic abortion was performed for complications in toxemia. One spontaneous abortion occurred 3 days after fluorescein angiography in a patient who was four weeks pregnant. Eight children born to toxemic mothers had low birth weights. Based on our data, we conclude that fluorescein angiography does not offer a high rate of birth anomalies or complications during pregnancy.

Adult↗