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: 471

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

Profile IconMatthew li and Stuart Wormleighton joined Hope2SleepGuide
yesterday
Marc Newman is now a member of Hope2SleepGuide
Wednesday
Profile IconJune Curtin and Frank Fartin joined Hope2SleepGuide
Mar 18
Lee replied to Lee's discussion DreamWear full face
"Well I turned EPR on and tried the mask again last night, but again I stopped breathing which woke me up gasping for air. It seems to happen just after or not long after I drop off, after the third time I changed mask back to original one and went…"
Mar 18
Kath Hope replied to Lee's discussion DreamWear full face
"Sorry for the delay as I managed to get myself locked out of the forum lol.  Please don't be messing with the pressures and contact your hospital if your wife has noticed you looking gray.  Perhaps go back to a different mask until…"
Mar 15
Edam replied to Edam's discussion APAP or BIPAP
"There is no link between the 95% pressure and the AHI. A few nights back my 95% pressure was 19.46 with AHI 0 Last night my 95% pressure was 17 with AHI 0 When the AHI does increase its normally hypopnoea,s So why does the APAP want to increase the…"
Mar 15
Lee replied to Lee's discussion DreamWear full face
"Hi thanks for the reply’s I will look at this as the wife said I was gray yesterday and after looking at the instructions again it says about the symptoms I had to not use and talk to my clinic so a bit worried. I used my other full face mask…"
Mar 15
Sleep2snore replied to Lee's discussion DreamWear full face
"I would say if you have the Ramp Start enabled to make it start at a higher pressure.  Check also if you are using a big enough cushion as this is a common mistake.  Same with Nasal Pillows, people tend too use a size to small. Check you…"
Mar 14
Sleep2snore replied to Edam's discussion APAP or BIPAP
"That is not impossible, even dust and mites can cause problems, even the mites that are so tiny you can't see them and they live on your body.  However, only you yourself can work out if certain food make things worse.  It could be…"
Mar 14
Edam replied to Edam's discussion APAP or BIPAP
"I am now finding that the pressure the APAP runs at during the night is dependent  on what I have eaten that evening. I have found that if I have bolied rice rather than chips with the evening meal then my 95% pressure can reduce by as much as…"
Mar 14
Kath Hope replied to Lee's discussion DreamWear full face
"Hi Lee.  Sorry to hear you're still having problems with masks.  It's not normal to feel there's not enough air with the DreamWear as that mask usually give people the opposite sensation of feeling more pressure than…"
Mar 13
Lee posted a discussion

DreamWear full face

Hi all I’m having trouble with my DreamWear full face mask,I’ve spent a long time getting the fit right but I have two problems 1. The bit between my nostrils somehow hurts it’s bearable but I would sooner not have the pain and 2. I have to breathe…See More
Mar 13
Sleep2snore replied to SleepyHead's discussion NHS or Private to get diagnosis to determine treatment
"How are you getting on, any progress?"
Mar 5
Sleep2snore replied to Edam's discussion APAP or BIPAP
"I was not off for a few days. The results were the same as when I started! Which I have to say was bad!"
Mar 5
Felicity Goodliffe is now a member of Hope2SleepGuide
Mar 5
Edam replied to Edam's discussion APAP or BIPAP
"It is my understanding that when a new sleep test is required you need to be off CPAP for a few days to get a accurate test. Is this correct The London hospital does not seem to be aware of this"
Mar 4
John Brown is now a member of Hope2SleepGuide
Mar 2
SleepyHead replied to SleepyHead's discussion NHS or Private to get diagnosis to determine treatment
"Thank you - that is very helpful"
Feb 26
Sleep2snore replied to SleepyHead's discussion NHS or Private to get diagnosis to determine treatment
"Private and will not be cheap!  London Sleep Clinic (PRIVATE) London Bridge Hospital  know nothing about this one. Sleep & Snoring Institute  Know nothing about this one either, If you are near London try getting to one of the…"
Feb 25
Sleep2snore replied to Edam's discussion APAP or BIPAP
"Sleepyhead YouTube.  Sleepyhead on YouTube"
Feb 25

© 2019   Created by The SleepGuide Crew.   Powered by

Badges  |  Report an Issue  |  Terms of Service