Emergency and Toxicologymiddle twist
A 9-year-old boy is brought to a regional Victorian hospital 45 minutes after a suspected snakebite to the calf while walking through long grass. A pressure immobilisation bandage was applied at the scene. He is asymptomatic with normal observations. The emergency department has a point-of-care coagulation analyser, and the hospital has an on-site laboratory. Which one of the following investigations is most appropriate to establish whether systemic envenomation has occurred?