A STAY in hospital is rarely pleasant, but the Hospital Authority's stand at the Expo shows how technology can be used to make a patient's life more comfortable and convenient. ''The aim is to present a picture of how technology can help us in achieving a patient-centred quality of care,'' said Dr Lawrence Lai, deputy chief development officer (medical). Dr Lai said the authority believed there were two aspects to patient care - the technical, involving diagnosis, treatment and drugs, and the interpersonal. This second aspect involves the ''caring attitude'' of doctors and nurses towards patients, and their attention to patients' needs and comfort. At a macro level, the authority can promote the interpersonal side by introducing technology and equipment to improve comfort. Much of the Authority's stand will be centred around new information systems to speed up patient processing, monitoring and dispensing drugs more effectively, and improving treatment for certain conditions. On display will be a robotic arm - developed by the City Polytechnic - which is to be used in treating nasopharyngeal cancer, an electric bed that can be tilted to suit the patient, and an automated tablet dispensing machine. Visitors will be encouraged to delve into the computer systems to learn more about the Hospital Authority. Visitors will also be able to obtain a copy of a patient card at the registration counter to show how computerisation will speed up registration at clinics and lead to better medical records.