Which statement is true regarding the proper technique for using a breathalyzer in asthma management?

Recording the highest reading from three attempts is a key technique in utilizing a breathalyzer effectively in asthma management. This approach helps to ensure that any variability in readings due to factors like effort or technique can be averaged out, allowing for a more reliable measurement of lung function. Asthma management often requires precise monitoring of respiratory status, and obtaining the best possible reading provides a clearer understanding of the child's lung capacity at any given time.

Using three attempts allows for fluctuations that might occur due to wave effort or other external factors to be measured and mitigated effectively. By taking the highest reading, healthcare providers can identify the best possible lung function at that moment, which can guide treatment decisions and adjustments in asthma management plans.