HALLETT MICHAEL DAVID,GUNARATNAM MICHAEL KASSIPILLAI,GREGERSEN ALLAN NILS
申请号：
NZ61038311
公开号：
NZ610383A
申请日:
2011.08.26
申请国别(地区):
NZ
年份:
2015
代理人:
摘要：
Disclosed is a respiratory valve apparatus for delivering a pressurised flow of breathable gas to the airway of a user. The apparatus is pressure responsive in opening and closing valve means during inhalation and exhalation phases. The apparatus comprises a valve body (20) a first valve means (70) a second valve means and an equilibrium passage (38). The valve body (20) includes an inlet port (22) for receiving a breathable gas and an outlet port (24) for releasing the gas to a user&rsquos airway during the inhalation phase and for receiving a gas during the exhalation phase. A breathable flow passage communicates between the inlet (22) and outlet (24) ports. An exhaust port (28) releases the exhaled gas. An exhaled gas flow passage (36) communicates between the outlet (24) and exhaust (28) ports. The first valves means (70) is located in the breathable gas flow passage. The first valve means (70) is operable under pressurised flow of breathable gas from the inlet port (22) to open the breathable gas flow passage during inhalation permitting the gas to the user and to close the breathable gas flow passage during the exhalation phase. The second valve means is located in the exhaled gas flow passage (36) and includes a flexible member in the form of a sock-like structure. The sock-like structure has a closed end which defines an internal cavity. The flexible member is operable under ambient pressure and during inhalation seals the exhaust port (28) for its closure and during exhalation deflects to at least partly expose and the exhaust port (28). The equilibrium passage (38) is disposed between an upstream side of the first valve means (70) and the internal cavity of the second valve means. The equilibrium passage (38) is operable under the pressurised flow of breathable gas from the inlet port (22) to divert part of the breathable gas to the internal cavity of the flexible membrane.
