Patient was educated on mechanism of inspiration as follows:

1. One respiratory cycle involves an act of inspiration, which is breathing in and an act of expiration, which is breathing out.
2. The mechanism of breathing in and out basically depends on the pressure changes that occur in the chest, in relation to the environment outside.
3. Contraction of the diaphragm will draw the muscle into the abdomen, thus leading to increase in the space of chest cavity.
4. This results in decrease in the air pressure inside the chest, in comparison to the external environment.
5. Air flows into the lungs, thus gradually increasing the air pressure towards the external environment.
6. When the air pressure in the chest equals the air pressure in the external environment, flow of air into the lungs will stop and the intercostal muscles move the rib cage upwards and out.
7. This increase in size decreases the internal air pressure and so air from the outside (at a now higher pressure that inside the thorax) rushes into the lungs to equalize the pressures.