| 摘要 |
Carbon dioxide-absorbing compositions for oxygen-circulating devices based on calcium hydroxide result in elevated carbon dioxide values in the respiratory circulation at the start of the ventilation, especially at low external temperatures. The onset of the reaction of the calcium hydroxide with the carbon dioxide from the respiratory air is accelerated by the presence of the heavy metals copper, zinc, manganese and iron. The metals may be admixed as oxide or salt with the calcium hydroxide. This results in an absorbing composition which absorbs sufficient CO2 right from the start of the ventilation, so that no elevated CO2 concentration occurs in the respiratory circulation. |
