Calculate the number of units per milliliter if a 3 mL vial of heparin containing 200,000 units

Step 1: Calculate the total number of units of heparin in the vial. Given that the vial contains

Calculate the number of units per milliliter if a 3 mL vial...

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Key Concepts

Drug Concentration

This concept refers to the amount of active substance (in this case, heparin units) present per unit volume of a solution. Understanding drug concentration is crucial in pharmacy and medicine to ensure that patients receive the correct dosage and that the medication is administered safely and effectively.

Dilution

Dilution is the process of reducing the concentration of a solute within a solution, usually by adding more solvent. In clinical contexts, it is commonly used to adjust the concentration of drugs to ensure accurate dosing, proper dispersion, and safe administration.

Total Amount Calculation

Before performing a dilution, it is important to calculate the total amount of the active ingredient present in the original concentrated solution. This involves multiplying the concentration by the volume of the original solution, which is then spread over the final total volume after dilution.

Ratio and Proportion

The application of ratio and proportion is essential when mixing solutions of different concentrations. After determining the total amount of the active drug, one divides that amount by the final volume of the solution to obtain the new concentration, ensuring the correct proportion is maintained in the final mixture.

Calculate the number of units per milliliter if a $3 \mathrm{~mL}$ vial of heparin containing 200,000 units $/ \mathrm{mL}$ is injected into $1000 \mathrm{~mL}$ of normal saline solution.

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