NEWTON, Mass.--(BUSINESS WIRE)--Aug. 24, 2006--Aspect Medical Systems (NASDAQ: ASPM) today announced that the Australian and New Zealand College of Anaesthetists (ANZCA) and the Madrid Centro Society for Anesthesia (MCSA) have each published recommendations for monitoring level of consciousness during anaesthesia. These recommendations were written to guide ANZCA and MCSA members in recognizing the problem of unintended awareness and adopt a consensus on how to reduce the incidence of inadvertent surgical wake-ups. Unintended awareness occurs when patients do not receive enough anesthesia, leaving them at risk for becoming aware of what is happening and remembering this experience after the surgery is over.