CoaguChek systems are easy-to-use reflectance photometers, portable and battery-powered devices for rapid measurement of Prothrombin Time (PT) and International Normalised Ratio (INR) for the monitoring of oral anticoagulant therapy. Regular PT/INR Monitoring is necessary as oral anticoagulant therapy is recommended in several indications. It has always been a challenge to healthcare professionals and to their patients: standard care involves a venous blood sample or the patient themself being sent to a laboratory. This is time-consuming and patient’s compliance can be limited, as it often requires a second appointment with the healthcare professional. The CoaguChek systems provide accurate results from a single drop of capillary blood from the fingertip within one minute.