Obesity

Question 1

BMI formula

Answer 1

BMI = weight (kg) / height (m)^2

Question 2

** Obstructive sleep apnoea:

Answer 2

• Decrease in airflow of more than 50% for more than 10s, 15 or more times per hour of sleep
• Associated with snoring
• May be associated with a decrease in arterial oxygen saturation of more than 4%
• Cycle:
  o Due to relaxation of tongue > collapse of soft tissue when they sleep so their airway collapses > can’t breathe > wake up

Question 3

BONES mneumonic

Answer 3

Predictors of difficult airway
- B  beard
- O  obesity
- N  no teeth
- E  extremes of age
- S  snoring