Drug infusion pump. Anaesthetist setting an infusion pump, used to deliver drugs in a precise and controlled manner into a patient's bloodstream. It is being set with the patient details to aid calculation of the correct dosages. The patient age is 33 years, and the drug in use here is Diprivan (propofol), used to sedate patients before administering stronger drugs for full general anaesthesia. Photographed in a UK hospital in 2014.