What is defined as sleep apnea occurring at least 5 times per hour during sleep?

The correct answer is obstructive sleep apnea. This condition is characterized by repeated episodes of complete or partial blockage of the upper airway during sleep, which leads to disruptions in breathing. For a diagnosis of obstructive sleep apnea, the criterion of having at least five apneic events per hour is a standard measure.

In obstructive sleep apnea, these events can lead to significant drops in oxygen saturation and fragmented sleep, resulting in various health complications and daytime dysfunction due to poor sleep quality. The condition typically presents with symptoms such as loud snoring, choking or gasping episodes during sleep, excessive daytime sleepiness, and difficulty concentrating.

Understanding obstructive sleep apnea in this context is crucial for identifying effective treatment options and addressing potential long-term health risks associated with untreated cases, such as cardiovascular disease, hypertension, and metabolic syndrome.