As sleep study (Nocturnal Polysomnography or "NPSG") begins at approximately 9pm, or earlier, if needed for children.
The sleep technician applies head and body electrodes to you (approximate time is 40 minutes). The technician applies electrodes to the scalp with water-soluble paste, tapes electrodes to the face, and straps other electrodes across the chest and abdomen. You are asked to sleep shortly after electrode application.
The technician monitors you throughout the night. The technician wakes you in the morning. You is offered a light breakfast. Test results are returned to the referring physician within two weeks. The standard sleep study screens for various sleep disorders such as sleep disordered breathing (including sleep apnea), poor sleep architecture and efficiency, and periodic limb movements (PLM).
For studies at home, a WatchPAT sleep testing device will usually be picked up in the office or shipped to your home. It is remarkably simple to apply, with the device worn on the wrist, and includes only a finger sensor and an additional small disk taped to the chest. There are no sensors on the head or face and you can sleep in your normal position in your own bed. The technology uses oxygen measurement, blood vessel tone measurement, snoring, position and movement analysis to accurately diagnose sleep apnea.