Magnesium Repletion Calculator

Formula

The formula to calculate magnesium repletion is:

\[ \text{MR} = \frac{\text{BW} \times \text{DR}}{\text{SR} \times \text{T}} \]

Where:

\(\text{MR}\) is the magnesium repletion (mg)
\(\text{BW}\) is the body weight (kg)
\(\text{DR}\) is the daily requirement of magnesium (mg/kg)
\(\text{SR}\) is the serum magnesium level (mg/dL)
\(\text{T}\) is the target serum magnesium level (mg/dL)

What is Magnesium Repletion?

Magnesium repletion is a medical treatment process that involves the restoration of magnesium levels in the body when they are significantly low. This condition, known as hypomagnesemia, can lead to various health problems such as muscle weakness, seizures, and irregular heartbeat. The repletion process typically involves oral or intravenous administration of magnesium supplements under the supervision of a healthcare professional.

Example Calculation 1

Let's assume the following values:

Body Weight (BW) = 70 kg
Daily Requirement (DR) = 5 mg/kg
Serum Magnesium Level (SR) = 1.5 mg/dL
Target Serum Magnesium Level (T) = 2 mg/dL

Using the formula:

\[ \text{MR} = \frac{70 \times 5}{1.5 \times 2} = 116.67 \text{ mg} \]

The Magnesium Repletion is 116.67 mg.

Example Calculation 2

Let's assume the following values:

Body Weight (BW) = 60 kg
Daily Requirement (DR) = 4 mg/kg
Serum Magnesium Level (SR) = 1.2 mg/dL
Target Serum Magnesium Level (T) = 1.8 mg/dL

Using the formula:

\[ \text{MR} = \frac{60 \times 4}{1.2 \times 1.8} = 111.11 \text{ mg} \]

The Magnesium Repletion is 111.11 mg.