Estudio de Sueño

Sleep Study

The objective of this blog is to help the general population learn about various diseases related to Pulmonology. In such a way that anyone who suffers from a respiratory disease can know it better or can be able to promptly identify any symptoms that require medical evaluation and that this allows them to make broadly informed decisions with their doctor.

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Today we will talk about the main sleep studies that exist: POLYSOMNOGRAPHY and the SIMPLIFIED STUDY.

What is a comprehensive sleep study?

Also known as polysomnography , it consists of recording neurological and respiratory variables during the night to evaluate the quantity and quality of sleep and which will allow us to assess the presence of one or more sleep disorders.

The complete sleep study is recommended for:

  • Assess sleep-related respiratory disorders.
  • Evaluate abnormal behaviors due to parasomnias.
  • Narcolepsy evaluation.
  • Adjust CPAP levels.
  • Assess why treatment for a sleep disorder is not working.

What are the symptoms of a sleep-related illness?

  • Snoring and obstruction of the pharynx that does not allow air to pass
  • Insomnia
  • Physical exhaustion
  • daytime sleep
  • Walking semi-consciously while asleep
  • Terror episodes with screaming and shaking
  • Uncomfortable sensations in the legs with an uncontrollable need to move them

There is also the simple sleep study, ideal for some patients with snoring or sleep apnea exclusively.


What difference does the simplified sleep study make?

This study is simpler, in some centers it is even carried out at the patient's home in which case the patient must put on the equipment themselves.

There are a variety of simplified devices, but they generally have an oxygenation and respiration sensor.

This study is recommended only in the following cases:

  1. There is a MODERATE to HIGH possibility of diagnosing SLEEP APNEA,
  2. The patient does NOT have sleep-related diseases other than sleep apnea, nor comorbidities that could confuse the results.

If you want to know your risk of sleep apnea, you can take the STOP-BANG questionnaire

Who should NOT undergo a simplified study?

  1. If the risk of sleep apnea is NOT high
  2. Another sleep disorder is suspected
  3. The patient has another comorbidity, whether pulmonary, neuromuscular or heart failure mainly.
  4. It is physically difficult for the patient to perform the exam at home.

Next, I will simplify the differences of these two studies





Any sleep-related illness

Exclusively sleep apnea

Sleep apnea

Definitive diagnosis

If the result is negative, it does NOT rule out sleep apnea.

Study of drowsiness, parasomnia, neuromuscular, CPAP adjustments and insomnia.



Supervised by technician


It's not mandatory. In some centers the patient puts on the equipment.

Register dream architecture



Qualification time and costs





  • A sleep study is done in a hospital room where you may bring:
  • Comfortable pajamas,
  • A toothbrush and toothpaste,
  • A change of clothes for the next day,
  • You will not be allowed to use cell phones or television.

On the day of the study:

  • Follow your regular routine,
  • Avoid naps, caffeine and alcohol
  • Do not use gel or spray on your hair
  • Ask us if you should stop any medications.

Later we will review the information and schedule an appointment to explain the results.

I am Dr. Cecilio Omar Ceballos Zúñiga, specialist in pulmonology and internal medicine [National Institute of Respiratory Diseases (UNAM) and General Hospital of the State of Sonora (UNAM)] and basic training at the Mexicali School of Medicine (UABC) . Co-founder of Breathbaja.

Ced. Prof. 4829126, reg. esp. 6119468 / 7440242

We are members of:
  • American Academy of Sleep Medicine
  • Mexican Academy of Sleep Medicine
  • Mexican Society of Pulmonology and Thorax Surgery
  • European Respiratory Society
  • American Thoracic Society
  • Latin American Thorax Association
  • Latin American Society of Respiratory Physiology
  • Mexican Society of Internal Medicine. Mexicali Chapter
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