| 摘要 |
A gas sampling device includes a foraminous hydrophilic element (3) for removing moisture from a gas which is to be analysed, in particular form air expired by a patient during medical treatment. In one embodiment the foraminous element (3) is incorporated in a water trap (1), and is arranged so that incoming, humid gas is directed onto the element. The water trap (1) includes a suction port (7) to enable moisture and gas to be drawn into the foraminous element (3). This reduces contamination of the outgoing gas, which is to be analysed, by incoming gas. In a further embodiment the element (3) is disposed in the main airway connecting the patient to ventilating apparatus. In this case, the element serves both to dry expired air passing to analysis apparatus, and to humidify ventilation gases passing to the patient. |
