ARMITSTEAD, JEFFREY, PETER,BATEMAN, PETER, EDWARD,BASSIN, DAVID, JOHN
申请号：
NZ58012508
公开号：
NZ580125A
申请日:
2008.05.09
申请国别(地区):
NZ
年份:
2012
代理人:
摘要：
Disclosed is a method of detecting respiratory flow limitation and a device utilizing such a method. The method determines a flow limitation measure (506) based one or more shape indices (502) and a determined ventilation measure or respiratory duty cycle (504). The shape indices may be based on functions that ascertain the likelihood of the presence of M-shaped breathing patterns and/or chair-shaped breathing patterns. The measure of ventilation may be based on analysis of current and prior tidal volumes to detect a less than normal patient ventilation. The duty cycle measure may be a ratio of current and prior measures of inspiratory time to respiratory cycle time to detect an increase in the patients inspiratory cycle time relative to the respiratory cycle time. Once the flow limitation has been determined, a pressure setting based on the flow limitation may be used to adjust the treatment pressure on a respiratory treatment device to ameliorate the patients detected flow limitation condition.
