6th July 2026

A 46-year-old male attends A&E with chest pain, haemoptysis, and dyspnoea.

A 46-year-old male attends A&E with chest pain, haemoptysis, and dyspnoea. He has a past medical history of chronic kidney disease and previous surgery for an inguinal hernia. You take his bloods and calculate his creatinine clearance to be 25mls/min. He is allergic to amoxicillin and contrast media. You suspect he has a pulmonary embolism and need to obtain imaging:

Which of the following is an indication to choose V/Q scanning over CTPA when investigating a PE?

Select the SINGLE most appropriate option from the list below. Select ONE option only.