Sleep apnea testing is used to evaluate repeated interruptions in breathing or reduced airflow during sleep. A healthcare professional may recommend testing when symptoms such as loud snoring, witnessed pauses in breathing, morning headaches, or excessive daytime sleepiness are present. The testing method depends on the individual’s symptoms, medical history, and the type of sleep disorder being considered.
Sleep apnea can be evaluated through different types of sleep studies. A polysomnography performed in a sleep center can record several body functions throughout the night, while a home sleep apnea test generally uses fewer sensors and focuses on breathing related measurements.
Common information collected during testing may include:
During an in laboratory sleep study, sensors are placed on different parts of the body before the person goes to sleep. The equipment records information throughout the night without requiring the person to actively participate in the test. Home testing involves portable equipment that is used according to the instructions provided by a healthcare professional.
Sleep apnea test results are reviewed by a qualified healthcare professional who considers the recorded measurements alongside symptoms and medical history. One commonly reported measurement is the apnea hypopnea index, or AHI. It represents the average number of complete breathing pauses and partial breathing reductions recorded per hour of sleep or monitoring, depending on the test.
Results may also provide information about oxygen levels and how often breathing disturbances occurred. Important findings can include:
The interpretation of results depends on the testing method and the individual’s circumstances. A test result should not be interpreted in isolation, because symptoms and other health factors can influence the overall assessment. If testing confirms sleep apnea, a healthcare professional can explain the findings and discuss appropriate management options.
Understanding the testing process and results can make it easier to have informed discussions with a healthcare professional. Sleep apnea evaluation is intended to identify abnormal breathing during sleep and provide information that can support an appropriate clinical assessment.