Table 5: Instructions for the subject

before performing body plethysmography.

Avoid smoking and vaping two hours before

Avoid wearing restrictive chest garments, such as vests, corsets or very tight clothing

Maintain your baseline medication. Bronchodilators and inhaled steroids modify the measurement, so the decision to suspend or continue these medications should be made by the requesting physician and the technician should report the time of the last dose

Fasting is not required for the test, but a light meal is recommended four hours before

You should avoid strenuous exercise on the day of the test