A 56-year-old male is found unconscious in a locked garage with the car engine running. He has cherry-red discolouration of the skin, GCS of 6, and re...

Question

A 56-year-old male is found unconscious in a locked garage with the car engine running. He has cherry-red discolouration of the skin, GCS of 6, and respiratory rate of 8. SpO2 reads 99%. What is the definitive investigation to confirm the diagnosis?

Accepted Answer

Co-oximetry measuring carboxyhaemoglobin levels on an arterial blood gas

Answer

Chest X-ray showing pulmonary oedema

Answer

Standard pulse oximetry with a confirmatory reading

Answer

Blood lactate level

Answer

Serum troponin level

uk-dipimc MCQ (SBA): CO Poisoning Diagnosis

A 56-year-old male is found unconscious in a locked garage with the car engine running. He has cherry-red discolouration of the skin, GCS of 6, and respiratory rate of 8. SpO2 reads 99%. What is the definitive investigation to confirm the diagnosis?