Category: Hypopneas

Published on April 7, 2001 Respiratory events are divided into two categories: apneas and hypopneas, in which airflow is substantially or partially reduced Respiratory disturbances during sleep have traditionally been divided into two categories: apneas and hypopneas. Noting the associations between four polysomnographic signal channels allows a distinction to be made between apneas and hypopneas and among different types of apneas and hypopneas. One channel is referred to as an airflow channel, channels #2 and #3 are referred to as thoracic and abdominal “effort” or movement channels, and the fourth channel is a recording of oxygen saturation via pulse oximetry. …