Measuring ventilation Flashcards
What 3 techniques can be used to produce data relating to lung volume? (measure lung volume)
Peak flow meter, vitalograph, spirometer
What does the peak flow meter measure?
Rate at which air can be expelled from lungs
Can rapidly assess asthma
Whats the main lung measurement that the vitalograph measures?
Forced expiratory volume in 1 second
Whats an advantage of using a vitalograph over a peak flow meter?
Measures amount of air breathed out + how quickly its breathed out, produces graph
Whats the advantages of using a spirometer rather than peak flow meter or vitalograph?
Measures diff aspects of lung volume + investigates breathing vol
Why must patients wear a nose clip whilst using spirometer?
To prevent air from escaping
How is measuring ventilation beneficial?
Helps inform medical professionals when diagnosing respiratory disorders
Whats the definition of tidal volume?
Volume of air that moves in + out of lungs with each resting breath
What is inspiratory reserve volume?
Max volume of air that can be breathed in over + above a normal inhalation
What is expiratory reserve volume?
Extra vol of air that you can force out above your normal tidal volume
Define residual volume:
Volume of air left in your lungs when you have exhaled as hard as possible
What is vital capacity?
Volume of air that can be breathed in when the strongest possible exhalation is followed by deepest possible inhalation
What is total lung capacity?
Sum of vital capacity + the residual volume
What is ventilation rate + how can it be calculated?
Used to measure function of the lungs
Tidal volume x breathing rate (per min) = ventilation rate
