Final answer:
To calculate how many ml of Novolog to administer for a 50 mg dose when the concentration is 25 mg/2 ml, we set up a proportion. Since the physician orders double the amount on hand, the Medical Assistant should administer double the volume, which is 4 ml.
Step-by-step explanation:
The student is presented with a dosage calculation task: On hand is 25 mg/2 ml of Novolog, and the physician orders 50 mg. To determine how many ml will the Medical Assistant administer, we use a simple proportion based on the concentration provided. If 25 mg is contained in 2 ml, then the desired dose of 50 mg will require a doubled volume because the amount of medication is doubled while the concentration remains unchanged. Therefore, the calculation is 50 mg × (2 ml / 25 mg), which simplifies to:
50 mg × (2 ml / 25 mg) = (50/25) × 2 ml = 2 × 2 ml = 4 ml.
So, the Medical Assistant should administer 4 ml of Novolog to deliver the prescribed 50 mg dose.