A sleep study or polysomnography, is a procedure done for the diagnosis of sleep disorder. It works by measuring the biophysiological changes that occurs in the body during sleep which include the brain, eye, heart, and muscle activity. Additional monitoring includes respiratory airflow and peripheral pulse oximetry.
It is indicated whenever patients complain of excessive daytime sleepiness or fatigue. Some of these disorders include narcolepsy, periodic limb movement disorder (PLMD), REM behavior disorder, parasomnias, sleep apnea and sleep related seizure disorders.
Electrodes will be placed over the patients, scalp, face, chest and lower limbs. This is done by securing electrodes on the surface of these areas with non toxic pastes and glues. An additional clip electrode will be placed on the finger of the patient.These electrodes will measure:
The patient will then be allowed to fall asleep naturally and monitoring will commence.
The electrodes will be removed with acetone. The remaining gel/paste is easily removed. The patient will be allowed to shower and change while the data is reviewed by a doctor.
Results will then be discussed with the patient.