Bassin, David John,Armitstead, Jeffrey Peter,Bateman, Peter Edward
申请号：
AU2008251011
公开号：
AU2008251011B2
申请日:
2008.05.09
申请国别(地区):
AU
年份:
2015
代理人:
摘要：
A respiratory flow limitation detection device, which can include an airwaypressure treatment generator, determines a flow limitation measure (506) basedone or more shape indices for detecting partial obstruction and a measure of apatient's ventilation or respiratory duty cycle. The shape indices maybe based on function(s) that ascertain the likelihood of the presence of M-shapedbreathing patterns and/or chair-shaped breathing patterns. The measure ofventilation may be based on analysis of current and prior tidal volumes to detecta less than normal patient ventilation. The duty cycle measure may be a ratio ofcurrent and prior measures of inspiratory time to respiratory cycle time to detectan increase in the patient's inspiratory cycle time relative to the respiratorycycle time. A pressure setting based on the flow limitation may then be used toadjust the treatment pressure to ameliorate the patient's detected flowlimitation condition.
