antibiotics. ExThera Medical’s Seraph® device uses the affinity of bacteria to immobilized heparin within the device, to bind the pathogen and lower its concentration in the bloodstream. Naturally-occurring heparin is a well-known anticoagulant that has many other useful biological properties making Seraph® a ‘biomimetic therapeutic device’. It can be an adjunct to anti-infective drugs by reducing the load and duration of infection, potentially preventing complications and the systemic inflammatory response that leads to organ failure. When no effective drugs are available Seraph may help patients recover by supplementing their own immune systems.