We are developing a suite of products to measure blood propofol concentration in real-time and without the need for blood sampling. Despite increasing evidence of benefits to patients and the environment of using Total Intravenous Anaesthesia (TIVA) rather than volatile or gaseous anaesthesia, adoption of TIVA by clinicians is limited partly by the lack of a real-time blood propofol concentration monitor. Somnus Scientific Limited is developing a suite of products to fill this gap.