Patent ID: 8931483
Filing Date: 2015-01-13
Classification: A61B,A61M

Abstract:
1. A method for administration of CPAP treatment pressure comprising: supplying breathable gas to a patient's airway at a treatment pressure with a respiratory treatment apparatus; determining a measure of respiratory airflow; calculating short term ventilation; determining a threshold based upon a calculation of long term ventilation; and with a processor: determining the occurrence of an apnea hypopnea by comparing the threshold with the calculated short term ventilation, wherein the calculated long term ventilation is not updated while an apnea or hypopnea event is in progress; determining a first value representing a number of times that the calculated short term ventilation is less than the threshold over a period of time; determining a second value representing a number of times that the calculated short term ventilation is not less than the threshold over the period of time; determining termination of the apnea/hypopnea based on a comparison between the first value and the second value; and increasing the treatment pressure with the respiratory treatment apparatus during the presence of the apnea/hypopnea.