Hope2SleepGuide

Sleep Apnoea Forum Bringing Help + Support to the Patient

A to Zzz's of Sleep Definitions and Abbreviations

A to Zzz of SLEEP DEFINITIONS AND ABBREVIATIONS


APNOEA:  Without Breath (also spelt Apnea in some countries).  Therefore, Sleep Apnoea means pauses in breathing whilst sleeping.


APNOEA/HYPOPNOEA INDEX (AHI):  The number of apnoea/hypopnoea incidents per hour.


APNOEA INDEX (AI):  The number of apnoea events per hour.


AROUSAL:  Going from sleep to wakefulness, or from a deeper to lighter stage of sleep.


APAP:  Automatic Positive Airway Pressure Machine (Automatic CPAP), which automatically adjusts the level of pressure needed on a breath-by-breath basis.   Useful for people on high pressures or who find it difficult to tolerate the pressure needed.


BI-PAP:  Bi-level Pressure Machine with 2 pressures – a lower pressure for exhalation and a higher pressure for inhalation.  (Useful for people who find it difficult to exhale against the pressure). 


BRUXISM:  Teeth grinding during sleep.


CENTRAL SLEEP APNOEA (CSA):  Absence of breath caused by irregularity in the brain’s control of breathing. 


CPAP:  Continuous Positive Airway Pressure Machine with one fixed pressure giving constant same-pressure therapy to keep the airways open.


EPAP:  Expiratory Positive Airway Pressure prescribed for the expiratory (breathing out) phase of a person on Bi-level CPAP therapy.


FLOW LIMITATION:  Partial closure of the upper airway impeding the flow of air into the lungs.


GERD (GASTROESPHAGEAL REFLUX DISEASE):  Flow of stomach acid upwards into the esophagus that can cause arousals and disrupt sleep. 


HST:  Home sleep study

 

HYPERSOMNIA:  Excessive daytime sleepiness.


HYPNOTICS:  Sleep-inducing medication.


HYPOPNOEA:  Shallow breathing, often accompanied by oxygen desaturation.


HYPOVENTILATION:  Decreased rate of breathing.


INSOMNIA:  Difficulty in falling and/or staying asleep.


INSPIRATORY POSITIVE AIRWAY PRESSURE (IPAP):  Pressure prescribed for the inspiratory phase of a person on Bi-level CPAP therapy.


LASER ASSISTED UVULOPALATOPLASTY (LAUP):   Operation using a laser to make some small cuts in your soft palate to make it firmer and hopefully reduce snoring. 


MICROSLEEP:  Sleep episode lasting from a fraction of a second up to 30 seconds – normally as a result of sleep deprivation. 


MIXED SLEEP APNOEA: A combination of Central and Obstructive Sleep Apnoea.


NARCOLEPSY:  A sleep disorder that causes excessive sleepiness and frequent daytime sleep attacks. 


NOCTURIA: Excessive, often frequent, urination during the night.


OBSTRUCTIVE SLEEP APNOEA (OSA):  Sleep disorder where the sufferer stops breathing for at least 10 seconds, caused by an obstruction, such as the uvula or tongue blocking the windpipe, soft palate dropping etc.

 

OBSTRUCTIVE HYPOPNOEA:  An episode of overly shallow breathing or an abnormally low respiratory rate, which is different from an apnoea as there does remain some flow of air.   It is also caused by the same obstructions as OSA.

 

OXYGEN SATURATION:  Oxygen saturation refers to the percentage of oxygen found in the  blood.  Normal values range between 90-100%.



 

PAP:  CPAP, APAP, BiPAP etc.

 

PERIODIC LIMB MOVEMENT DISORDER (PMLD):  A sleep disorder where the sufferer involuntarily moves their limbs during sleep.

 

PSG:   Polysomnography or the Sleep Study

 

PULSE OXIMETER:  Medical device which monitors the oxygen saturation and heart rate of the wearer.  

 

RAINOUT:  Term used to describe a build-up of condensation/water in the CPAP hose tube from the humidification.  (A hose cover normally fixes this!).


RESPIRATORY DISTURBANCE INDEX (RDI):  Includes all respiratory events per hour. 


REM SLEEP (RAPID EYE MOVEMENT SLEEP):  The sleep stage where there is rapid eye movement (hence it’s name), loss of body movement, more brain activity and where dreaming occurs.


RESTLESS LEGS SYNDROME (RLS): A sleep disorder characterized by a tingling, aching, crawling and itching of the limbs which can last for hours and usually gets worse at night, preventing the sufferer from getting the sleep they need. There is an almost irresistible urge to move the legs to ease the discomfort. 

 

RPSGT:  Registered Polysomnography Technologist or Sleep Tech for short.


SEPTOPLASTY:  Surgery to straighten the nasal septum (dividing the nasal passage).  A deviated septum can cause nasal blockage and sinus problems.


SLEEP APNOEA:  Cessation of breathing for 10 or more seconds during sleep, and takes the form of Obstructive Sleep Apnoea, Central Sleep Apnoea or Mixed Sleep Apnoea.


SLEEP DEBT:   A build-up (often accumulated over many years) of sleep deprivation, and the body requires this to be paid back.  In the case of Sleep Apnoea, this debt does not usually start to get paid back until the sufferer is on successful treatment.


SLEEP PARALYSIS:  An experience of waking and not being able to move at all for (usually) a short period of time.  Whilst this is not harmful, it can be very distressing.


TONSILLECTOMY:  Surgical removal of the tonsils which can alleviate the symptoms of obstructive Sleep Apnoea, or in the case of children, removal can cure Sleep Apnoea until they are adults, in most cases.


TRACHEOTOMY: Surgical procedure to create an opening in the trachea (windpipe) so that one can breathe.  At present this is the only known complete cure for Sleep Apnoea.


UPPER AIRWAY RESISTANCE SYNDROME (UARS):  A sleep disorder caused by blockages to breathing from the upper airways – most often caused by nasal congestion.  It is closely related to Sleep Apnoea, and certainly mimics most of the symptoms.  Unlike Sleep Apnoea, 50% of the sufferers are female. 


UVULOPALATOPHARYNGOPLASTY (UPPP):  Surgical procedure to remove the uvula, pharyngeal arches and often partial removal of the soft to help improve the symptoms of Sleep Apnoea.


Views: 461

Add a Comment

You need to be a member of Hope2SleepGuide to add comments!

Join Hope2SleepGuide

Sleep Apnoea Forum

New to the Sleep Apnoea Forum? 

1. Stop by our Sleep Apnoea Welcome Center to introduce yourself to the SleepGuide community.
2. Start a New Topic of Conversation.
3. Post your photos - of yourself, your old CPAP machine, your new CPAP machine, your pet, something about you!

Interested in advertising, have a problem or need to contact us? Click the Report an Issue page.

 

Latest Activity

Sue Butcher replied to Sue Butcher's discussion RESMED S9 ESCAPE CPAP AND HUMIDIFIER in the group Buy-Sell-Swap
"*******NOW SOLD********"
yesterday
Dennis Pramas replied to Darryl Milligan's discussion Humidity and AHI
"Hi Darryl, I have a similar experience concerning increased humidity and AHI. For about one year I have been using the ResMed s9 Autoset with F20 mask, a pressure setting of 10 cm H2O without a humidifier and have been averaging AHI below 5. The…"
Saturday
Profile IconDianne Shaw and Dennis Pramas joined Hope2SleepGuide
Thursday
Terry James posted a discussion

First week with CPAP and it's not going well

Hi all,First of all, I would like to say what a great forum! I feel I might just be using this more often.A little background if I may?I was diagnosed late last year with OSA, with an AHI of 29 - so on the edge of severe OSA. If I'm honest, I wasn't…See More
Jan 15
May posted discussions
Jan 14
Profile IconMay, Terry James and Mark A joined Hope2SleepGuide
Jan 14
Profile IconMark Grocock and Lynne J Austin joined Hope2SleepGuide
Jan 5
Tony Westcott updated their profile
Jan 2
Donna Batters is now a member of Hope2SleepGuide
Dec 29, 2018
Lemongrape is now a member of Hope2SleepGuide
Dec 23, 2018
Mags updated their profile
Dec 21, 2018
Mags left a comment for Mags
"Hello Everyone   I'm so glad I've found this wonderful informative site.  Just been diagnosed recently with sleep apnea and finding it all very difficult.  Just cannot get used to wearing the mask and take it off most…"
Dec 18, 2018
Kath Hope replied to Ruth Furniss's discussion Blocked nose
"Definitely nothing inside the humidifier chamber except plain water.  Olbas Oil on a tissue or Vicks as Eric states, and there's a more detailed article on the website here https://www.hope2sleep.co.uk/blog/cpap-masks-with-a-cold.html"
Dec 18, 2018
Eric Swindon replied to Ruth Furniss's discussion Blocked nose
"I have never done that because the general consensus is that any addition to the humidifier chamber might corode the metal plate. However, I do get the odd cold and frequently suffer from blocked nose at least on one side and my answer which works…"
Dec 17, 2018
Ruth Furniss posted a discussion

Blocked nose

If you have a cold and blocked nose can you put a couple of drops of olbas oil in your humidifier water?See More
Dec 17, 2018
Mags is now a member of Hope2SleepGuide
Dec 17, 2018
Rod J Brunton posted a discussion

NEEDED: CPAP nasal pillow style mask & headgear - FX, DREAMWEAR or any similar style

Does anyone have a nasal pillow style mask & headgear they don't like or don't use? Mine vanished somewhere between Vancouver & Glasgow & I didn't notice till I got to Kirky.  I have a spare one at home, but that's not helping me while I…See More
Dec 12, 2018
Rod J Brunton is now a member of Hope2SleepGuide
Dec 12, 2018
Andy Falconer updated their profile
Dec 11, 2018
Andy Falconer replied to Andy Falconer's discussion First night with CPAP
"Hi Kath, I'm hoping the next few nights will see me get my AHI down further, but i'm also keen not to put too much pressure on the situation. I have to say i'm very impressed with the Hope2Sleep service so far, with regular updates…"
Dec 11, 2018

© 2019   Created by The SleepGuide Crew.   Powered by

Badges  |  Report an Issue  |  Terms of Service