Respiration

Question 1

Describe the use of the ‘iron lung’

Answer 1

The ‘iron lung’ is used for people with polio who were paralysed. The person lay with their chest sealed in a large metal cylinder. When are was drawn out of the cylinder the person’ schist moved out and they breathed in. The vacuum which was formed inside the the splinter crests a negative pressure, when air is pumped back into the cylinder it creates pressure on the chest and forces air out do the persons lungs

Question 2

Describe the use of positive pressure breathing aids

Answer 2

They force measured amounts of air into the lunges by positive pressure. Bags of air are linked to masks can force air down the trachea

Question 3

Give an advantage of a positive breathing aid compared with the iron lung

Answer 3

They are often smaller, easier to mange in the home and can be linked to computers for control

Question 4

What the several breathing aids which have been developed?

Answer 4

‘Iron lung’

Positive pressure breathing aids

Question 5

Advantages of positive pressure

Answer 5

Useful during operations, where surgeons need access to the body

Question 6

Disadvantages of the positive pressure

Answer 6

Effective at ventilating the lungs

Long-term ventilation requires the tube to be surgically inserted into the trachea through the neck

Question 7

Advantages of iron lung (negative pressure)

Answer 7

Effective at treating many polio patients over the years

Question 8

Disadvantages of iron lung (negative pressure)

Answer 8

Patient is confined to the machine

The vacuum on full-body machines can affect the abdomen, leading to the pooling of blood in lower parts of the body