摘要 |
<p>A special gas dose delivery unit (13) for respiratory equipment has a special gas flow conduit (19) connected to a special gas source (15). The unit (13) includes a supply (23) of carrier gas for the special gas, preferably obtained by withdrawing gas from the inspiration limb (6) of the patient breathing circuit (2). A valve (21), controllable in accordance with desired special gas dose parameters and the breathing pattern of the patient, injects the special gas into the carrier gas for provision to the outlet conduit (22) of the special gas dose delivery unit (13). The outlet conduit (22) is connected to the patient limb (6) of the breathing circuit (2) for delivery to the patient.</p> |