For children, heparin sodium is administered by intermittent...

For children, heparin sodium is administered by intermittent IV infusion in a range of 80 to 100 units $/ \mathrm{kg}$ of body weight every $4 \mathrm{hrs}$. For a 100 $\mathrm{lb}$ child, calculate the range, in $\mathrm{mL}$, of a heparin sodium injection containing 1000 units/ $\mathrm{mL}$ to be administered daily.

Key Concepts

Weight Conversion

Many medication dosing regimens, particularly in pediatrics, require conversion from pounds to kilograms because doses are generally calculated on a per kilogram basis. This conversion is fundamental for ensuring that the medication is given according to the patient’s actual body weight, thereby optimizing therapeutic efficacy and safety.

Dosage Calculation

Dosage calculation involves determining the amount of medication to be administered based on a prescribed unit dose per unit of body weight. This requires multiplying the dose (units per kilogram) by the patient's weight in kilograms, ensuring that the correct amount of medication is delivered for each individual dose.

Dosing Frequency and Cumulative Dose

Understanding dosing frequency is vital when a medication is administered intermittently. Calculating the total daily dose involves multiplying the single dose amount by the number of administrations per day. This concept is crucial for drugs with scheduled intervals to maintain effective blood levels over time.

Unit Conversion for Volume Calculation

Unit conversion for volume calculation involves relating the units of medication provided in the dosing calculation to the volume of the drug solution based on its concentration (units per mL). This step ensures that the calculated dose in units is accurately converted to a measurable volume for actual administration.

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