Obstructive Sleep Apnoea Flashcards Preview

Hugh's MD2 Core Conditions and Presentations > Obstructive Sleep Apnoea > Flashcards

Flashcards in Obstructive Sleep Apnoea Deck (19):
1

Is snoring synonymous with OSA?

No, 50% of the population snore

2

How does sleepiness and tiredness/lethargy differ?

Sleepiness is the ability to fall asleep very easily cf. general fatigue

3

What is the most common cause of daytime sleepiness?

Lifestyle - not enough sleep

4

What are some DDx for daytime sleepiness?

Lifestyle

Drugs/Alcohol

Sleep breathing disorder

Restless leg syndrome

Insomnia

Narcolepsy

5

Why does the tongue fall back?

Loss of genioglossus muscle tone

6

What is the sex proportions for OSA?

24% of males 

8% of females

7

What are the cardinal symptoms of OSA?

Heavy snoring

Daytime somnolence

Witnessed apnoea

Unrefreshed sleep

Nocturia

 

8

What are some consequences of OSA?

Neuro

- Excessive sleepiness

- Psychologic problems

- Stroke 

- Dementia

- ADHD

Cardio-Respiratory

- HTN

- Cor pulmonale

- MI

- Arrhythmias/sudden death

- Polycythaemia

9

What are some risk factors for OSA?

Age

Male

Obesity

Alcohol/Sedatives

Upper airway morphology

10

What is a significant desaturation during an apnoea?

>4%

11

How is OSA diagnosed?

Number of events per hour (apnoea hypopnoea index)

5-15: mild

15-30: moderate

>30: severe

12

What is the definition of an apnoea?

Complete cessation of airflow for 10s or longer

13

What is an hypopnoea?

30% or more reduction in airflow associated with >3% O2 desaturation or an alpha wave arousal from sleep

14

How do you assess whether some with diagnosed OSA needs treatment?

Chance of long term adverse complications

Clinical picture

Social factors

15

When is surgery used in OSA?

Children mainly

Rarely adults

16

What are some conservative management options for OSA?

Weight loss

Avoid alcohol

Bodyposition

Nasal congestion

17

How does CPAP work?

Continuous positive pressure to open up airways

18

What is the most common second line therapy for OSA?

Mandibular advancement splint

19