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Results for “Respiratory Protective Devices”

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At least 199 records · Page 11Linked to original sources
PubMed1987

Characteristics of farmers who have obtained personal dust respirators.

A postal survey was used to investigate the characteristics of farmers who have acquired dust respirators. In 1979 about a quarter of the farmers were using dust respirators, men more often than women. The more vocational training the farmer had and the larger the area of land under cultivation the more likely he was to own a dust respirator. Grain producers had purchased the protective devices more frequently than other farmers had. Farmers who participated in the occupational health intervention during 1980-82 had acquired dust respirators considerably more often than those in the control group. In the intervention group men under 30 years had most frequently purchased the dust respirators. Participation in the intervention influenced the acquisition of dust respirators more than did occurrence of symptoms of chronic bronchitis or farmer's lung.

Adult↗
PubMed1987

Reduced work tolerance associated with wearing protective clothing and respirators.

This study examined worker tolerance and physiological responses to two levels of work while subjects wore various types of protective clothing and respirators. Nine healthy men (mean age = 24.8 years, weight = 75.3 kg, max VO2 = 44.6 mL/kg/min), experienced with the use of respirators, each performed a randomized series of eight experimental tests, each test scheduled to last 180 min. Work was performed on a motor-driven treadmill at a set walking speed and elevation indicative of either 30% (low work intensity) or 60% (high work intensity) of maximum work capacity for each individual. Four protective clothing ensembles were examined: light work clothing (LIGHT), light work clothing with SCBA (SCBA), firefighter's turnout gear with SCBA (FF) and chemical protective clothing with SCBA (CHEM). Physiological measurements included heart rate, skin and rectal temperature, and minute ventilation. Measurements were obtained every 2.5 min until test termination (tolerance time). If less than 180 min, tolerance time was defined by subjective or objective signs of near maximal stress. Mean tolerance times at the low work intensity were 167, 130, 26 and 73 min, respectively, for the LIGHT, SCBA, FF and CHEM ensembles. At the high intensity, mean tolerance times were 91, 23, 4 and 13 min, respectively. At the low work intensity, heart rate with SCBA rose very slowly during the tests and remained approximately 15 beats/min higher than the heart rate for subjects wearing the LIGHT ensemble. In contrast, heart rate with the FF and CHEM ensembles rose sharply and did not approach steady-state values.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1987

Scott Emergency Escape Breathing Device evaluation for use by aircraft cabin crew and passengers.

The Scott Emergency Escape Breathing Device (EEBD) was evaluated for use in Canadian Forces (CF) transport/passenger aircraft in providing smoke protection during emergencies and in preventing hypoxia during cabin decompression at high altitude. Five human subjects wearing the EEBD were subjected to decompression from 2,438 m (8,000 ft) to 9,753 m (32,000 ft) in approximately 15 s followed by a free fall to 7,010 m (23,000 ft) in a challenge gas atmosphere of 5,000 ppm of carbon monoxide (CO), where they performed moderate exercise (80 W output) on a bicycle ergometer. Very little in-leakage of CO was observed when the neck seal was maintained. Hood atmosphere was measured at 97% oxygen at 7,010 m, which resulted in an arterial oxygen saturation (SaO2) of 97%. Temperature in the hood rose to as high as 45.5 degrees C but the subjects were able to function normally. The EEBD is effective in providing noncockpit aircraft crew with smoke protection, adequate vision, and hypoxia prevention for at least 15 min in the event of a fire, smoke, or decompression emergencies at altitudes up to 7,010 m following a brief exposure to 9,753 m.

Accidents, Aviation↗
PubMed1977

[Contact dermatitis caused by ethylene oxide].

A case of contract sensitization to the ethylene oxide by a mask sterilized with this substance is reported. The mask was correctly sterilized but the ethylene oxide was not completely evaporised. The path tests were positive in the patient but negative in 25 control subjects. The patch tests with the international series and with all the elements of the mask were negative. The possible troubles of ethylene oxide and the sterylisation methodes of this substance are reviewed.

Dermatitis, Contact↗