| 摘要 |
The detector 3 for an endotracheal tube 1 has a pump means such as resilient bellows 26, and a carbon dioxide, colour-change indicator 25 mounted at the machine end 13 of the tube. Compressing and releasing the bellows 26 indicates whether or not the patient end 12 of the tube 1 is occluded. When the patient end 12 of the tube 1 is not occluded, gas is drawn into the indicator by the bellows 26 to provide an indication of carbon dioxide level. The detector 3 may be mounted at the machine end of a stiff introducer tube 20 extended along the endotracheal tube 1. Alternatively, the detector may be mounted by a stem (41 fig 3) directly into the bore at the machine end 13 of the tube 1. |
