目的：研究异丙酚普鲁卡因静脉麻醉对人体高铁血红蛋白含量的影响。

Objective: Research of impact of vein anaesthesia with propofol procaine on content of methemoglobin.

高铁血红蛋白：血红蛋白的氧化形式，含正铁离子而非亚铁离子，不能携带氧。

Methemoglobin — the oxidized form of hemoglobin, containing iron in the ferric rather than the ferrous state, that is incapable of binding oxygen.

高铁血红蛋白还原酶途径利用了NADH的还原电位维持血红蛋白中铁元素的还原态(Fe2 +)。

The reducing potential of the NADH is utilized via the methemoglobin reductase pathway to maintain the iron in Hgb in its reduced form (Fe2 +).