Working from home

List four features of a headache which may suggest a serious underlying disease (0.25 marks for each correct answer):

On further questioning, the patient tells you that her symptoms actually started when she stopped going to the office and started working exclusively from home.

You ask the patient if there is a properly functioning carbon monoxide alarm in her house but she is unsure.

You suspect carbon monoxide poisoning as the possible cause of her symptoms.

List four of the most common symptoms and signs of carbon monoxide poisoning (0.25 marks for each for each correct answer):

Other than in carbon monoxide poisoning, state two groups of patients who may have a raised carboxyhaemoglobin (COHb) level on their blood gas (0.5 marks for each correct answer).