3.1.1e) The relationship between vital capacity, tidal volume, breathing rate and oxygen uptake Flashcards
Peak flow meter
Measures the rate at which air can be expelled from the lungs
Often used by asthmatic patients
Vitalographs
Similar to peak flow meter
Patient breathes out as quickly as possible through a mouthpiece
A graph is produced of the amount of air is breathed out and how quickly
Volume of air - forced expiratory volume in 1 second
Spirometer
Used to measure different aspects of the lung volume or breathing patterns
Tidal volume
Volume of air that moves in and out of the lungs in 1 resting breath
500cm³
15% of vital capacity
Vital capacity
Volume of air breathed out during strongest exhalation possible followed by the strongest inhalation possible
Inspiration reserve volume
Maximum amount of air you can breathe in over & above normal inhalation
Expiratory reserve volume
The extra amount of air you can force out of your lungs over and above normal tidal volume you breathe out
Residual volume
Volume of air that is left in your lungs you have left in your lungs after strongest exhalation
Total lung capacity
The sum of the vital capacity and the residual volume
Breathing rate
Number of breaths taken per minute
Ventilation rate
Total volume of air inhaled in 1 minute
Ventilation rate = tidal volume x breathing rate (per minute)
