Obstructive sleep apnoea Flashcards
1
Q
What is obstructive sleep apnoea
A
Tongue, tonsils, soft palate rarely can collapse -> complete AW obstruction when tone reduced in sleep -> transient O2 dip + subconscious arousal hundreds of times a night -> unrefreshing sleep, daytime sleepiness + snoring
2
Q
What is a hypopnea
A
Partial obstruction
>10 seconds >30% redution in flow + desturation >4%
3
Q
Reasons for waking
A
chemoreceptors sense drop of oxygen → kick of adrenaline to stimulate rep muscles + wake up a little to open AW
Alos → tachycardia, swings in BP
4
Q
Symptoms of OSA
A
- Excessive daytime sleepiness
- Snores or stops breathing overnigth
- Dropping off during the day
- Increased BMI and larger neck sizes
- Craniofacial abnormalities or narrow nasopharynx
5
Q
What score is used on OSA
A
Epworth sleepiness score and Stop bang
6
Q
Investigations ofr OSA
A
Polymnography
EEG/EMG
Sats oxygen, HR, airflow
7
Q
Treatment for OSA
A
Weigth loss
Wean opiates/benzos
CPAP
Mandibular advancement devices
