Positive pressure respirators

Male or female Beagle or Labrador-Harrier dogs weighing 15-25 kg are used for the test. The dog is anesthetized by intravenous injection of 35M0 mg/kg pentobarbital sodium followed by subcutaneous injection of 2 mg/kg morphine. Respiration is maintained through a tracheal tube with N2O/O2 (3 1) using a positive pressure respirator. 

United States Department of Labor, Occupational Safety and Health Administration, OSHA Training Institute, Online Course 2220a (unknown year) Respiratory protection. Lesson 2, Air Purifying Respirators, Positive Pressure Respirator, U.S. Department of Labor, Occupational Safety and Health Administration, OSHA Training Institute, Washington, DC. Available at http /respiration.eleaming.dol.gov/Termin/T4/p2/ (accessed September 2006). 

Positive-pressure respirators maintain a positive pressure in the facepiece during both inhalation and exhalation. Negative-pressure respirators draw air into the facepiece via the negative pressure created by user inhalation. Different types of facepieces are available for use with the various types of respirators. 

Positive pressure respirator means a respirator in which the pressure inside the respiratory inlet covering exceeds the ambient air pressure outside the respirator. 

Comment In these premature infants with idiopathic respiratory distress syndrome (RDS) many problems are present. The decrease in insensible water loss resulting from humidification compounds the problem of inappropriate vasopressin secretion associated with positive pressure respirator therapy (K jekshus t, 1972). Fluid and caloric supply is limited by these factors. 

Is fit testing required of positive pressure respirators such as SCBAs, powered air purifying respirators (PAPRs), and supplied air respirators (SARs) ... 

Yes. Clinical studies show that positive pressure respirator use can harm the employee. 

Positive-pressure-powered respirator (std efficiency) including half-masks, full face-masks, blouses and suits Positive-pressure respirator (high efficiency) BS4558/BS4771 20... 

In the midst of all the confusion, the doctors in Bhopal worked out as rational a treatment as possible, which comprised of atropine, antibiotic eyedrops, and anti-spasmodics. Treatment of pulmonary edema requires hospitalization and positive pressure respiration Bhopal neitiier had enough beds nor equipment to provide this. 

Employers must help find a suitable respirator. Manufactmers may offer several different sizes. Respirators may also vary in size from manufacturer to manufactmer. Users may be able to get a better fit by tr3dng a respirator made by another manufactmer. In some cases, the use of powered positive-pressure respirator may be appropriate. 

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