ABC Medical Center > Procedimientos > Polysomnography


21:59 - 4 May , 2021

Medical procedure



What is Polysomnography?

Also known as a sleep study, it consists of a series of specific tests to detect various sleep abnormalities through an exhaustive recording of the heart and respiratory rate, the level of oxygen in the blood, the waves emitted by the brain, and the frequency and intensity of movement of eyes and legs while the patient sleeps.

This study is usually conducted in a sleep clinic or in a hospital that has a center dedicated to this type of disorder, although it is also possible to perform it at home by bringing the necessary technological equipment to do so. This latter modality is typically used to diagnose sleep apnea.

With it, it is possible to identify your sleep disorder or, if you already have a diagnosis, it can serve as a tool to plan the treatment you require. 

Polysomnography analyzes sleep cycles to observe them and identify when interruptions appear and their reason. 

It is recommended to perform it when there the following disorders are suspected:

  • Respiratory abnormalities and apnea.
  • Narcolepsy.
  • Chronic insomnia.
  • Periodic leg movements and bizarre behavior syndrome. 

There are no potential risks in polysomnography since it is a safe and non-invasive test that does not cause any discomfort. 

Before the study you should avoid foods or drinks that contain caffeine and prevent you from falling asleep, as well as alcohol, drugs, and tobacco.

You will spend one night in the hospital or sleep clinic and return home the next day unless the test needs to be repeated for definitive results.

At the Neurophysiology Clinic we are prepared to offer you the most advanced neurophysiological tests to diagnose the various pathologies that affect your nervous system, which represent a quantitative, reproducible, and generally non-invasive measure that enriches the neurological examination, providing an interaction platform and support in the diagnosis and treatment of neurologically affected patients.

The tests we perform include all the tools of a comprehensive neurophysiology service:

  • Electroencephalogram.
  • Electromyography.
  • Evoked potentials.
  • Outpatient polysomnography.
  • Hospital polysomnography.
  • Transcranial doppler.
  • Neuro-otology tests.
  • Otoacoustic emissions.
  • Intraoperative monitoring.
  • Magnetic stimulation.

Related centers and departments:


  • Silva-Cruz TM, Cruz-Zorrilla GE, Alejandre-García A, et al. Hallazgos polisomnográficos en niños con síndrome de Prader-Willi. Neumol Cir Torax. 2018;77(2):132-136.
  • Gutiérrez RS, García GVA, Castellanos JL. Apnea/hipopnea del sueño y bruxismo nocturno. Rev ADM. 2018;75(4):196-201.
  • Marmolejo-Torres ME, Torres-Fraga MG, Rodríguez-Reyes YG, et al. ¿Cómo calificar una poligrafía respiratoria? Reglas de la Academia Americana de Medicina del Sueño. Neumol Cir Torax. 2020;79(2):110-115. doi:10.35366/94637. 
  • Flores MWA, Salazar TRC. Estudio de la apnea obstructiva del sueño por polisomnografía en el Hospital Central Militar. Rev Neurol Neurocir Psiquiat. 2003;36(3):119-125.

The dissemination of the content of this material is for informational purposes only and does not replace, under any circumstance or condition, a consultation with a specialist doctor, for which the ABC Medical Center is not responsible for the different use that may be given to it. If you require more information related to the subject, we suggest you contact the specialist doctor you trust directly.