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: 549

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

Kath Hope replied to Mark's discussion Help! I'm not sure where to turn anymore.
"Hi Mark Just to let you know we've replied to your email, so can you check you've received the message in case it's gone to your junk or spam by mistake. Thanks."
10 hours ago
Kath Hope replied to Amanda S's discussion Which is the best sleep apnoea test?
"Welcome Amanda and sorry to hear of your husband's struggles.  It sounds like he either went to a clinic that don't treat people with an AHI of less than 15 from the sleep study results, or he could have had a pulse oximetry sleep…"
yesterday
Amanda S posted a discussion

Which is the best sleep apnoea test?

This is my first post and I am very grateful to have found this forum.My husband was tested for sleep apnoea  using a home test on the NHS in Dec 17. At the interview afterwards they told him he had sleep  apnoea  but not bad enough to be given a…See More
yesterday
Amanda S is now a member of Hope2SleepGuide
Monday
Kath Hope replied to David's discussion Breas Z1 cpap machine error 33,
"Good luck and definitely stress you only used it for travel so had very little use."
Monday
David replied to David's discussion Breas Z1 cpap machine error 33,
Monday
David replied to David's discussion Breas Z1 cpap machine error 33,
"No Kath it’s not and disappointing. I’m holding fire to buy a travel one till next year when (if) we go abroad, Until then I’ll use my dream station as I won’t have carry it."
Monday
Kath Hope replied to David's discussion Breas Z1 cpap machine error 33,
"Heck, that's not lasted long David, and I assume you've not used it much either (more for travel).  Might be worth saving up for the DreamStation Go which has most features the same as your DreamStation.  We sell it at the…"
Sunday
David posted a discussion

Breas Z1 cpap machine error 33,

My Breas Z1 machine has suddenly started showing error 33. Having contacted my supplier in the Uk it turns out that Breas will not repair it . I’ve only had about 4 years max. I feel that this is terrible service from the manufacturer to not support…See More
Sunday
Profile IconKiersten and thatbloke joined Hope2SleepGuide
Saturday
Mark replied to Mark's discussion Help! I'm not sure where to turn anymore.
"Thank you kath. I'm sending you through an email with the data from my cpap machine.The email address beings with my username."
Jul 29
Gavin Wayne is now a member of Hope2SleepGuide
Jul 26
Kath Hope replied to John Garbutt's discussion Dream mapper 90% pressure changes
"You're welcome John (my next appointment's October too as the May one got cancelled due to COVID).  Just one other little thought is that if it's only been occuring recently it could be that you're getting more nasal…"
Jul 23
John Garbutt replied to John Garbutt's discussion Dream mapper 90% pressure changes
"Thanks for your reply Kath, I am not due for a hospital visit till October so I will see how he numbers go and contact them if it starts to creep up."
Jul 23
Kath Hope replied to John Garbutt's discussion Dream mapper 90% pressure changes
"This can happen John when the default minimum pressure of 4 is set, which I stress does work for a lot of people, but sometimes clinics do raise that minimum pressure as if the pressure tends to run very low in between the apnoeas and then suddenly…"
Jul 23
Kath Hope replied to Mark's discussion Help! I'm not sure where to turn anymore.
"You're welcome Mark and an ENT consultation could certainly prove useful and they'll be able to spot the reason for your obstructive sleep apnoea. Acid reflux is often caused by the sleep apnoea.  I'm no medic, so will explain…"
Jul 23
John Garbutt posted a discussion

Dream mapper 90% pressure changes

HiI have been using a philips CPAP machine  for about four months and my AHI has been anything from 0.3 to 2.6 but occasionally the 90% pressure drops from 9 to 8 and my AHI shouts up to about  5 and today to 8.7 is this normal? Mask fit is always…See More
Jul 23
Mark replied to Mark's discussion Help! I'm not sure where to turn anymore.
"Hello Kath, Thank you very much for responding it's greatly appreciated. I hadn't considered an ENT referral. In fact I didn't know that was possible. I'll call my doctors and ask about it. I'm using a full face mask. I have…"
Jul 23
Kath Hope replied to Mark's discussion Help! I'm not sure where to turn anymore.
"Sorry to hear how you're struggling Mark and if on your initial sleep study your AHI was only just into the border of sleep apnoea, it's likely that it did start off as UARS and has progressed into the sleep apnoea range.  Many people…"
Jul 22
Kath Hope replied to Savannah A.'s discussion Sanitising machines
"Hi Savannah and great to hear you're now successfully treated on CPAP.   We sell the SoClean at the charity and if you go to his link you'll see honest reviews from our own sales, and I've used the SoClean myself for the…"
Jul 22

© 2020   Created by The SleepGuide Crew.   Powered by

Badges  |  Report an Issue  |  Terms of Service