Emergency Medicine Book

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Chemical Defense Mask

Aka: Chemical Defense Mask, M40 Mask
  1. Indications: M40 Mask
    1. Protects face and respiratory tract
      1. Volatile agents and aerosols
      2. Removes biological and toxin agents
  2. Description: M40 Mask
    1. Full face respirator
    2. External filter canister
      1. HEPA filter
      2. ASZ charcoal impregnated
  3. Limitations: M40 Mask
    1. Substances not filtered
      1. Ammonia
      2. Carbon Monoxide
      3. Nitric oxide
      4. Carbon dioxide
    2. Does not protect in close space with Oxygen <19.5%

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