Artificial breathing aids

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  • Created by: siobhan
  • Created on: 04-05-13 14:43
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  • Artificial breathing aids
    • there are many reasons why someone cannot get enough oxygen into their blood stream
      • if the alveoli are damaged, the surface area for gas exchange is reduced
      • if the tubes leading to the lungs are narrowed, less air can be moved through them
      • if the person is paralysed, their muscles will not work to pull the ribcage up and out.
    • several types of breathing aid have been developed
      • the 'iron lung' was used for people with polio who were paralysed. the person lay with their chest sealed in a large metal cylinder.
        • when air is drawn out of the cylinder the person's chest moved out and they breathed in. the vacuum which was formed inside the cylinder created NEGATIVE PRESSURE
        • when air was pumped back into the cylinder it created pressure on the chest and forced air out of the person's lungs
  • several types of breathing aid have been developed
    • the 'iron lung' was used for people with polio who were paralysed. the person lay with their chest sealed in a large metal cylinder.
      • when air is drawn out of the cylinder the person's chest moved out and they breathed in. the vacuum which was formed inside the cylinder created NEGATIVE PRESSURE
      • when air was pumped back into the cylinder it created pressure on the chest and forced air out of the person's lungs
  • positive pressure aids are often smaller, easier to manage in the home and can be linked to computers for contol

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