We are offering convenient telehealth e-visits and home diagnostic services for all of our existing patients as well as for new patients.

Learn More

Sleep Medicine Acronyms (From APAP to Zzzz): Part 2, E-M

It can be frustrating trying to understand medical jargon of any kind. Sleep medicine acronyms are no exception.

Here is a series on abbreviations you are likely to encounter during your visits to a sleep specialist or sleep center.

This second section highlights terms that start with the letters E through M.

Sleep Medicine Acronyms (E-M)

E

ECG/EKG

Electrocardiogram. A medical device which measures heart rhythm, rates, and activity. Using ECG during a sleep study helps to confirm sleep stages, tracks cardiac activity during sleep, and records the presence of arrhythmias. Sensors are applied to the chest and ribcage.

EDS

Excessive Daytime Sleepiness. The experience of extreme fatigue during waking hours which can interfere with the activities of daily living.

EEG

Electroencephalogram. A medical device which measures brain wave activity through the application of electrodes to the scalp. Using ECG helps to confirm sleep stages, identifies seizure activity during sleep, and records the presence of neurological dysfunction during sleep.Learn more:

EMG

Electromyogram. A medical device which measures muscle activity. Using EMG helps to confirm sleep stages and identifies key symptoms for specific sleep disorders. Sensors are applied to the legs and chin and sometimes the arms.Learn more:

EOG

Electro-oculogram. A medical device which measures eye movement. Using EOG helps to confirm sleep stages. Sensors are applied to the face near the eyes.

EPAP

Expiratory Positive Airway Pressure. While using PAP therapy, EPAP is the measurement of positive airway pressure that is applied during exhalation. In CPAP, EPAP is the same with both inhale and exhale; with BiPAP, the EPAP is delivered at a lower pressure.

ESS

Epworth Sleepiness Scale. A questionnaire that all sleep patients fill out which helps to assign severity to their overall sense of sleepiness during the day.

G

GERD

Gastroesophageal Reflux Disease. Also commonly referred to as acid reflex or heartburn , this is a condition in which the valve that separates the esophagus from the trachea to prevent food particles and stomach acid from entering the airway loses its tone or otherwise malfunctions.

H

HSAT

Home Sleep Apnea Test. This portable sleep test is used in the home for one or more nights to ascertain whether a patient is at high risk for sleep apnea. It is also referred to as HST.Learn more:

 

I

ICSD-3

International Classification of Sleep Disorders, Third Edition. This is the authoritative clinical reference used for diagnosing sleep disorders.

IPAP

Inspiratory Positive Airway Pressure. While using PAP therapy, IPAP is the measurement of positive airway pressure that is applied during inhalation. In CPAP, IPAP is the same with both inhale and exhale; with BiPAP, the IPAP is delivered at a higher pressure.

M

MMA

Maxillomandibular Advancement. This refers to technology applied by certain oral devices used to treat snoring, upper airway resistance, and obstructive sleep apnea. These mouthpieces advance the lower jaw as the wearer sleeps, allowing the airway to keep its tone and preventing its collapse.

MSLT

Multiple Sleep Latency Test. This refers to a specific kind of sleep test which is used to identify and diagnose certain kinds of hypersomnias, such as narcolepsy.

MWT

Maintenance of Wakefulness Test. This refers to a specific kind of sleep test which is used as a public safety precaution to assess daytime sleepiness in workers who operate vehicles or heavy machinery. It is also used to measure effectiveness of PAP therapy in new sleep apnea patients.

Further Reading

News & Updates

What is a Split Night Sleep Study and why would I need one?

When you are scheduled to undergo a sleep study, you may not realize that there is more than one kind of sleep study. Aside from the home sleep apnea test (HSAT)which you may have already experienced there are three main in-lab, overnight sleep tests you might encounter. Many people start with an overnight or nocturnal…

Read more

Sleep Apnea Raises Your Risk of Sudden Cardiac Death: Get the Facts

You may have heard of sleep apnea, but do you really know what it is? Far from a harmless sleep disorder that keeps you from a sound night’s rest, sleep apnea can lead to serious health complications, including sudden cardiac death. According to the American Sleep Apnea Association, 22 million Americans suffer from sleep apnea.…

Read more

Tips for Cleaning Your CPAP Machine

Every day you take great pains to ensure that you’re wearing clean socks and underwear for hygienic purposes. This ingrained standard of care is the type of thing you should be doing when it comes to your CPAP (continuous positive airway pressure) machine. Just think, you spend a fair number of hours every night with…

Read more