1.6 Artificial Breathing Aids Flashcards
1
Q
Why was the iron lung designed?
A
To help patients with polio to breathe
2
Q
What is the iron lung?
A
A tube the patient lies in, with an airtight seal around their neck to form a vacuum
3
Q
How does the iron lung work?
A
- When air is drawn out of the the cylinder the persons is sucked out (moves out) due to the vacuum so the pressure in their thorax decreases, causing them to breathe in
- The vacuum formed in the cylinder created a negative pressure
- When air is pumped back in, it created pressure on their chest so it forced the air out of the persons lungs
4
Q
How does the positive pressure ventilation system work?
A
- A face mask is placed on your face or a tube is out down your trachea
- It forces air into your lungs by reducing the pressure in the tube, so the air moves from the outside into their lungs
- It is cut off to allow their lungs to deflate
5
Q
Name 3 reasons people can’t get enough oxygen into their bloodstream and therefore need an artificial breathing aid
A
- the alveoli are damaged so the surface area for gas exchange is reduced
- the tubes leading to the lungs are narrowed so less air can move through them
- the person is paralysed so their muscles will not work to move their ribcage up and out
6
Q
Name 2 advantages of the iron lung
A
- keeps you alive
* you can talk while you’re in it
7
Q
Name 3 disadvantages of the iron lung
A
- it’s invasive
- you’re stuck in a tube so it’s very restricting
- you’re immobile
8
Q
Name 4 advantages of the positive pressure ventilation system
A
- easier to manage in the home
- useful in emergencies
- less invasive
- less restricting
9
Q
Name a disadvantage of the positive pressure ventilation system
A
•can’t talk at the same time
10
Q
Name 2 types of artificial breathing aid
A
- positive pressure ventilation
* negative pressure ventilation (the iron lung)
