Patient Info

Common Medical Sleep Terms and Definitions

  • Sleep Apnea: Apnea is a cessation of breathing, lasting anywhere from 10 seconds and above while sleeping.
  • Bi-level Therapy: Some patients require two different pressures during a titration sleep study. Regular CPAP produces one pressure to open the airway. Bi-level produces two pressures: one for inhalation and one for exhalation.
  • Chin strap: A strap placed on the chin to assist the patient in keeping their mouth closed while sleeping. When the mouth is closed, it helps pull the tongue forward and keep it from obstructing the airway.
  • CPAP (Continuous Positive Air Pressure): CPAP therapy is the common treatment for patients who display Obstructive Sleep Apnea. The air pressure delivered via mask acts as an air splint opening the airway to allow patients to breathe on their own with no extreme effort.
  • CPAP masks: There are three basic styles of sleep masks: nasal pillows or direct air, nasal masks, and full-face masks. Each style has many different types and designs.
  • Sleep Dental Device(s): oral appliance therapy prepared and designed at our facility to patient specifications based on oral anatomy and severity of sleep apnea condition by Dr. Anahita Abdehou D.D.S.
  • DME (Durable Medical Equipment) Company: An independent medical supply company that provides patients with masks, CPAP machines and oxygen. There are many to choose from and is often pre-determined by the patient’s insurance carrier, Baltimore Sleep and Wellness Center has chosen to work with a select group of DME companies whom we have identified as providing the best service to our patients.
  • ECG (Electrocardiogram): Monitors heart rate and rhythm.
  • EEG (Electroencephalogram): Monitors brain activity.
  • EMG (Electromyogram): Monitors REM (Rapid Eye Movement) stage and Bruxism (teeth-grinding).
  • Hypopnea: Shallow breathing.
  • OSA (Obstructive Sleep Apnea): Shallow breathing occurring over five times in a one hour time period.
  • PLMs (Periodic Limb Movements): Monitors leg movement.
  • Polysomnogram (PSG): A recording of a person’s sleep pattern, breathing, heart activity, and limb movements during sleep.
  • SaO2 (Saturated Oxygen): Percent of oxygen saturation in the blood. Normal SaO2 is 90%-100%.
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