Uses of spirometer

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