Systematic Machine Learning Algorithm for Rapid Thrombosis Detection

POC D-dimer will be compared to laboratory D-dimer in hospital setting and used in a machine learning model

Point of care (POC) ultrasound performed by ED physicians compared to ultrasound performed by radiologist. POC ultrasound 3 point examination performed by ED physician will be compared with POC ultrasound full leg examination performed by ED physician.

The DSS will be compared to the usual strategy. It will also be estimated how many participants where DVT could have been excluded without ultrasound.