(type 4) conversion of lab values
5. mEq and mOsmol 5.1) mEq 5.1.1) mEq - General
5.1.1.1) mEq from weight/volume Normal 1
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The normal blood level of Mg++ is 1.5 - 2.5 mEq/L. A patient is suffering from hypomagnesimia , and the blood level is found to be 1.26 mEq/L. Express this in mmol/dL unit.
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lb equals 0.063 mmol/dL kg
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The term deci liter (dL) means tenth of a liter, or, 100 mL. For Mg++ , the atomic weight is 24 and the valence is 2. Therefore, we can write:
24 mg = 2 mEq.
24 mg = 1 mmol.
`therefore` 1 mmol = 2 mEq.
This fraction `(1 \quad mmol)/(2 \quad mEq)` will be used in this problem. Using dimensional analysis, we can write: `(1.26 \quad mEq)/(1 \quad L) × (1 \quad mmol)/(2 \quad mEq) × (1 \quad L)/(1000 \quad mL) × (100 \quad mL)/(1 \quad dL) `
`= (0.063 \quad mmol)/(dL)` Ans.