Cyanosis can be seen in most examination cases. It is a grave mistake to miss such a finding. The advice below will help you answer questions.

There are 2 types of cyanosis

Peripheral cyanosis and central cyanosis

Causes of peripheral cyanosis

  • Exposure to cold
  • Raynaud’s phenomenon
  • Congestive cardiac failure
  • Hyperviscosity syndrome
  • Shock

Causes of central cyanosis

  • Congenital cardiac disease
  • Eisenmenger’s syndrome
  • Acute severe asthma
  • Tension pneumothorax

Sites to look out for-

Peripheral cyanosis

  • Tip of nose
  • Ear lobe
  • Fingers and sole
  • Nail bed

Central cyanosis

  • Tongue
  • Gums, palate, cheek
  • Lower palpebral conjunctiva

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