The unexpected collides with 4 hour rule in the natural laboratory for error that is the emergency department... Act 1: The Existential Installment and Act 2: The Clinical Section...WITH a cliffhanger.
You are handed over a patient by a colleague (that's a 'handoff' to you Yanks)... He says he would usually send a patient like this home, but as the d-dimer is pending he suggests the patient should wait for the result.