Patent ID: 7337778

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 a respiration signal 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 that operates on said breathing parameter to generate a respiration signal indicative of the breathing pattern of the patient; said control unit further deriving short-term and long-term averages of said respiration signal, said display adjusting circuit operating to adjust a baseline of said respiration signal 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 adjusting circuit adjusts the displayed respiration signal in accordance with said long-term average in response to one set of conditions, and adjusts the displayed respiration signal in accordance with said short-term average in response to another set of conditions.