Cpr face mask with filter protected from patient-expired condensate

Abstract

A CPR face mask has a face engaging part positionable on the face of a patient to surround at least the mouth of the patient. An air flow control valve is carried by the face engaging part and has an upper inlet into which air can be blown by a CPR giving person and which passes downwardly through a first outlet into a patient's mouth. The flow control valve causes air passing upwardly from the patient's mouth into the first outlet to be released to the external atmosphere through a second outlet without passing to the inlet. The flow control valve has a flexible diaphragm operable to prevent air flow from the inlet to the second outlet when the CPR giving person is blowing into the inlet and to prevent air flow from the first outlet to the inlet when air passes upwardly from the patient's mouth into the first outlet. A filter is located immediately upstream of the diaphragm with respect to air flow blown into the first inlet by the CPR giving person. The diaphragm having a filter-blocking position assumed during patient exhalation to protect the filter from patient-expired condensate.