Polysomnography (PSG) is a sleep study that consists of a test that records sleep throughout the night. In this way, this dream can be assessed with oxygen level , limb movements, electrocardiogram (ECG) and eye movements. It is a test that is used when you want to rule out sleep problems or when the goal is to diagnose them .
With the realization of polysomnography we can study various types of pathologies, such as apneas, periodic movements of extremities, insomnia, epilepsy and other pathologies related to sleep: hypersomnia, parasomnia, ...
Results of polysomnography
The PSG results are not always a numerical value, in the case of apneas, it is the AHI (apnea / hour index). Those that are above 5 may mean that the patient suffers from sleep apnea, being mild between 5 and 15, moderate between 15 and 30, and severe if the result is greater than 30.
Indications before polysomnography
A normal life pattern should be followed, without alcohol intake or other substances that may affect the nervous system (stimulants or nerve depressants). In addition, you should not make a copious dinner, do not nap that day and if you take medication to sleep do not take it until you have consulted with the technician who will perform the test. It is also important not to use lacquers, hair gums or other hair products that day.