Patent ID: 6895963

Claim:
A respiratory apparatus for delivering a flow of air to a patient suffering from sleep disordered breathing comprising: a blower that generates a flow of pressurized air; a patient interface adapted to deliver air from said blower to the patient; a display receiving and displaying signals and having a predetermined display range; and a control unit coupled to said patient interface and adapted to sense a breathing parameter, said control unit including a display adjusting circuit means for operating on said breathing parameter to generate a respiration signal indicative of the breathing pattern of the patient; said control unit further including a first averager used to determine a long term average of said breathing parameter, and a second averager used to determine a short term average of said breathing parameter, said display adjusting circuit means adjusting a base line of said breathing parameter in accordance with at least one of said long term and short term averages to restrict said respiration signal to said predetermined display range; and wherein said display receives said respiration signal and presents it within said predetermined range.