CHI+MED (Computer-Human Interaction for Medical Devices) is an EPSRC-funded project to improve the safety of interactive (programmable) medical devices, such as infusion pumps. By understanding more about device design and human factors, medical errors can be reduced thus saving lives. Our goal is to learn more about medical devices and how people design, buy and use them in the real world. From this understanding we will investigate how to reduce the likelihood and consequences of human error. We are working with patients and their carers, nurses and other medical practitioners, manufacturers who create medical devices, NHS staff who purchase them and regulatory bodies who oversee patient safety.