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What is the tidal volume ?
The volume of air inhaled and exhaled when breathing at normal rate
What is the vital capacity ?
The total volume of air that can be inhaled and exhaled
What is the residual volume ?
The volume of air left in the lungs after forced exhalation
What does total lung capacity mean ?
The total volume of air the lungs can hold
What are the factors that can affect the vital capacity ?
Age
Sex
Height
Level of exercise
Respiratory health issues
How to calculate the breathing rate ?
Count the number of peak ( breath ) per mins / mins or secs
What are the substance that absorb CO2 in the spirometer ? And why ?
Soda lime
Cuz : it’s used to absorb the CO2 we exhale and so that we can only measure the change in volume of oxygen in the chamber
What are the function of the counterpoise ?
To show the open / close of the chamber by the force of our breath
What happen to the chamber when we inhale ?
Chamber move down
What happen to the chamber when we exhale ?
The chamber move upwards
Why does the trace go down ?
When we inhale, oxygen diffuse into our blood , which are replaced by CO2 which we exhale
CO2 is absorbed by soda lime so the volume of air inhaled the chamber decreases
Decrease in volume = volume of O2 absorbed
