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Results for “Protective Devices”

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At least 1,243 records · Page 69Linked to original sources
PubMed1989

Effect of respiratory protective equipment on exposure to asbestos fibres during removal of asbestos insulation.

Asbestos concentrations were measured within powered respirators used by workers involved in the removal of asbestos-containing insulation. Fibre concentrations within the protective gear appeared to be above the Dutch threshold limit value for crocidolite (0.2 f cm-3). Possible sources of exposure were analysed and measures were taken to improve the situation. After this, the fibre concentrations in the breathing area were reduced and were below the Dutch concentration limit.

Air Pollutants, Occupational↗
PubMed1983

Reaction time to spatial frequencies using yellow and luminance-matched neutral goggles.

The popularity of yellow goggles for outdoor activities has long been a paradox to visual scientists as previous tests of their effectiveness have failed to show any visual advantage. The achromatic/chromatic theory of color vision suggests a possible solution to the paradox which was tested by measuring reaction times to spatial frequencies of varying contrast. Reaction times were faster with yellow goggles than with luminance-matched neutrals under certain conditions. These conditions included frequencies in the middle of the range of human sensitivity and, specifically, the lower contrasts of these frequencies. The theoretical and practical applications of the results are discussed.

Color Perception↗
PubMed1993

Ocular findings in asymptomatic amateur boxers.

A group of 25 active, asymptomatic, amateur boxers were examined to evaluate the nature and incidence of ocular pathologic conditions in amateur boxing. An approximately age-matched group of 25 men who were not boxers was used as a control group. The number of fights varied from 1 to 220 (mean 39.4), and the number of spar rounds from 20 to 600 (mean 192.5). Visual acuity was 20/20 in all subjects of both groups, except for one boxer with keratoconus. Intraocular pressure was below 20 mmHg in all eyes. In 19 (76%) boxers, pathologic anatomic findings were attributed to contusion trauma. Lesions of the anterior eye segment included injuries of the lid in 3 eyes (12%), angle abnormalities in 5 (20%), and slight lens opacities in 5 (20%). Posterior vitreous detachment was observed in 3 (12%) boxers and peripheral retinal scars were seen in 15 (60%). In 6 (24%) eyes, retinal tears or atrophic holes were detected. In the 7 (28%) boxers with lesions of the anterior eye segment, the posterior segment was also affected in 6 (85%). In the control group, an atrophic hole was found in one (4%) patient with no other ocular pathologic findings.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1986

Screening prospective workers for the ability to use respirators.

A physician should determine the ability to use a respirator, taking into account the employee's health, the respirator, and the work conditions. This report reviews the effects of respirator wear and provides referenced, reasonable guidelines for determining a worker's fitness to wear a respirator. The effects discussed include pulmonary, cardiac, body temperature, diminished senses, psychological reactions, and local irritation. Examining physicians should realize that heavy exercise with a respirator usually causes stress primarily on the cardiovascular system and that heavy (eg, self-contained, atmosphere-supplying) respirators can substantially increase this stress. Accordingly, exercise stress tests, with ECG monitoring, should be considered in these circumstances when cardiovascular risk factors are present. Available literature is noted that should help physicians screen prospective workers for the ability to use respirators.

Health Status↗
PubMed1988

Contributing factors to sandblasters' silicosis: inadequate respiratory protection equipment and standards.

National concordance standards for respiratory protection during abrasive blasting have existed for more than 50 years; however, these standards have not kept pace with advances in blast equipment, have not provided realistic estimates of expected protection in the workplace, and have been misused by manufacturers and distributors of respiratory protective equipment who have assured, through sales literature, that the equipment is acceptable for conditions under which they have never been tested. This situation has contributed to exposure of sandblasters to hazardous levels of respirable free silica, and is reviewed here to prevent a continuation of the incompatibility of these and other standards for respiratory protection with the actual exposures to various noxious inhalants in the workplace.

Humans↗