Spirometry is a physiological test used to measure an individual’s maximum air volume during inhalation and exhalation with full effort. The test primarily focuses on measuring either volume or airflow over time. However, ensuring the quality of these tests is crucial. It requires accurate equipment, patient cooperation, and optimal effort. Registered respiratory therapists (RRTs) and pulmonary function laboratory personnel play a vital role in coaching patients for optimal performance. However, performing spirometry tests can be challenging, particularly with new patients, young children, and the elderly. This difficulty, coupled with the need for multiple attempts to achieve quality results, limits the utility of spirometry in many countries.

To address these challenges, providing patients with descriptive information pamphlets or demonstrational videos prior to testing can help prepare them for the procedure. The testing process typically involves instructing the patient on the correct technique, demonstrating the procedure, conducting the test, assessing its acceptability and repeatability, and providing feedback to improve the patient’s technique if necessary. Inconsistent patient effort has been observed to introduce greater variability in pulmonary function test measurements compared to other medical tests. Inadequate instruction and coaching by pulmonary function laboratory personnel contribute to inconsistent patient effort.

The aim of our randomized controlled trial is to assess whether providing patients with a demonstrational video in their native language prior to the spirometry test can improve its success rate with fewer attempts. This approach aims to make the test easier for both the patient and the instructor, ultimately improving the overall quality and efficiency of spirometry testing