6th July 2026

A 39-year-old male attends A&E.

A 39-year-old male attends A&E. He reports having had pain and swelling in his left calf for 3 days before waking up this morning with chest pain, dyspnoea, and haemoptysis. He is normally fit and well with no past medical history and does not take any regular medication. His observations are as follows:

HR: 104
RR: 22
SpO2: 91% on room air
Blood pressure: 118/76
Temp: 37 

What is the appropriate length of time he should remain on anticoagulation?

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