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镁是人体内重要的阳离子,在细胞外液中它次于钠、钾、钙,在细胞内液中仅次于钾。全身镁的总量的98%左右在细胞内及骨骼内,仅1%在血浆中。镁在人体内对多种酶系统有激活作用,维持横纹肌神经肌肉及心肌的应激,对平滑肌有舒张解痉作用。正常血清镁为0.75~1.25mmol/L(1.5~2.5mEq/L)。如血清镁小于0.75mmol/L(<1.5mEq/L),或24小时尿镁排出量小于1.5mmol/L(<3mEq/L)可确诊为低镁血症。
Magnesium is an important cation in the human body. It is second to sodium, potassium and calcium in extracellular fluid and second only to potassium in intracellular fluid. About 98% of the total body magnesium in the cells and bone, only 1% in the plasma. Magnesium in the human body on a variety of enzyme systems have an active role in maintaining the rhabdomyxis muscle and myocardial stress, smooth muscle relaxation antispasmodic effect. Normal serum magnesium 0.75 ~ 1.25mmol / L (1.5 ~ 2.5mEq / L). Such as hypomagnesemia serum magnesium less than 0.75mmol / L (<1.5mEq / L), or 24 hours urinary magnesium excretion less than 1.5mmol / L (<3mEq / L) can be diagnosed as hypomagnesemia.