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

For children, heparin sodium is administered by intermittent IV infusion in a range of 100 to 120 units $/ \mathrm{kg}$ of body weight every 4 hrs. For a $60-$ $\mathrm{lb}$ child, calculate the range, in $\mathrm{mL}$, of a heparin sodium injection containing $4000 \mathrm{units} / \mathrm{mL}$ to be administered daily.

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Key Concepts

Concentration and Volume Calculation

When a medication is supplied in a concentrated solution, it is necessary to calculate the volume required to achieve the desired dose. This involves using the concentration of the drug (in units per mL) to determine how much solution to administer, linking the prescribed dose to the actual volume given.

Dosage Range Calculation

This involves determining the minimum and maximum amounts of a drug based on a given range, such as 100 to 120 units per kilogram. Calculating a dosage range is important for tailoring treatment to individual needs while accounting for variability in patient response.

Unit Conversion

Often, medication dosing requires conversion between measurement systems, such as pounds to kilograms. Knowing how to accurately convert weights is essential in ensuring that the prescribed dose based on the patient's weight is correct, particularly when dosages are given in metric units.

Weight?Based Dosing

This concept involves calculating the correct amount of medication based on the weight of the patient. It is crucial in pediatrics to ensure both efficacy and safety, where doses are typically given in units per kilogram. Understanding this helps prevent underdosing or overdosing.

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