摘要 |
A chemical absorbent comprises a hydrated mixture of a major proportion of a pharmaceutically acceptable hydroxide of a Group II metal and a minor proportion of silica, the chemical absorbent being substantially free of Gro up I metal ions. The chemical absorbent is particularly useful in low flow or closed circuit anaesthesia, and is advantageous in that it does not react wi th volatile anaesthetic agents in such a way as to cause the build up of toxic substances within an anaesthetic breathing circuit. |