PubMed Health⌕ Search

Biomedical subjects

E Miron

Publications and source records attributed to E Miron.

At least 19 recordsLinked to original sources

Push-pull optical pumping of pure superposition states.

A new optical pumping method, "push-pull pumping," can produce very nearly pure, coherent superposition states between the initial and the final sublevels of the important field-independent 0-0 clock resonance of alkali-metal atoms. The key requirement for push-pull pumping is the use of D1 resonant light which alternates between left and right circular polarization at the Bohr frequency of the state. The new pumping method works for a wide range of conditions, including atomic beams with almost no collisions, and atoms in buffer gases with pressures of many atmospheres.

Journal Article↗

Population colorectal cancer screening with fecal occult blood test.

Screening for early detection of colorectal cancer using fecal occult blood testing has been shown to be effective in reducing mortality from this disease. The largest Health Maintenance Organization in Israel initiated the use of Hemoccult Sensa in 1992 to evaluate the field performance of this test. All primary care physicians were invited to order home-based tests for their asymptomatic patients 50-74 years of age. This report summarizes the results of 45,166 tests performed, 22,193 in the prevalence round. Seventy-eight cancers, 60 patients with adenomas, and 163 patients with polyps were detected, yielding a cancer detection rate of 2.61/1,000 screened in the prevalence round. Of these, 21.6% were in the right colon. Of screen-detected cancers, 44.5% and 58.9% were detected in Dukes' A and in situ stages in the prevalence and incidence rounds, correspondingly. The overall estimated sensitivity of the test (median follow-up, 35 months) was 85.3% for the prevalence round with a specificity of 95.5%. The sensitivity for left-side tumors (87.9%) was higher than for right-side or rectal tumors (78.6%). The positive predictive value for cancer increased with increasing number of positive fields. Four or more positive fields had a positive predictive value for cancer of 16-26% and a positive predictive value of 46-71% for all tumors combined. Population screening with a sensitive fecal occult blood test performs well outside a trial setting, detecting a high proportion of expected tumors with favorable stage distribution. Given its proven power to significantly reduce mortality, use of this test is strongly advised to both medical organizations and the healthy population at average risk.

Aged↗

[Shy-Drager syndrome].

An 81-year-old man with a history of chronic pulmonary disease due to heavy smoking and ischemic heart disease had been suffering for the past few years from chronic constipation and urinary incontinence and was receiving medication for cardiopulmonary symptoms and urinary incontinence. He was admitted for repeated falling for a few months prior to admission. When put in the supine position, his blood pressure fell. He had bilateral pulmonary rales, consistent with lung disease, eccentricity of the left pupil (after cataract surgery), constriction of the right pupil, and absence of the pupillary light reflex. There was generalized hyperreflexia and a bilateral Babinski sign. He had normocytic, normochromic anemia; B12, folic acid and ferritin were within normal ranges, ESR was rapid, there was hyperglobulinemia (IgA and IgG), urea nitrogen and creatinine were increased but returned to normal after rehydration. ECG and chest X-ray were consistent with his cardiopulmonary status. Bone-marrow biopsy showed hypocellularity. IVP and barium enema were normal. Echocardiography revealed a possible old posterior wall myocardial infarction. CT-scan showed moderate cerebral and cerebellar atrophy, calcifications in the carotid and vertebral arteries, and small infarcts in both hemispheres. At this point, after an extensive survey of the literature, the diagnosis of Shy-Drager syndrome was proposed and proved by monitoring ECG and serum levels of noradrenaline during postural changes. He was treated with Fluorinef and there were no more episodes of postural hypotension. Several weeks after discharge he reported that he was feeling well and had not fallen since discharge.

Aged↗