| 摘要 |
An apparatus for administering a gas other than ambient air to a patient via the airways, comprising a face mask (202) provided with fitting means (202A) which can be fitted over the nose and mouth on the patient's face, thereby forming a breathing space (203) closed off in a substantially leakproof manner, an air supply (204) for supplying ambient air which opens into the breathing space (203) via a check valve (204A) which closes upon exhalation, which air supply (204) is provided with manually operable blocking means (204C), an evacuation line (206) which opens into the breathing space (203) via a check valve (206A) which closes upon exhalation, for evacuating, from the breathing space (203), gas present therein, and a supply of gas (205) with gas other than ambient air which opens into the breathing space (203), which supply is provided with a demand valve (205). |
