A special-purpose robot for prostatectomies has been developed. Detail
s of the robot mechanism, control system and human/computer interface
(HCI) are discussed with special emphasis on software methods to ensur
e system safety. The clinical application of the system is described a
nd software requirements for operating-theatre use are indicated. Thes
e requirements include safe error recovery, facilitation of reliable s
urgical procedures, and an effective HCI.