An order for furosemide 120 mg IV STAT will be dispensed using furosemide 40 mg/2 mL. What volume in mL of the stock injection will be required to deliver the requested dose?

Rationale

6 mL of the stock injection will be required to deliver the requested dose of furosemide.

To calculate the volume needed for the order of 120 mg of furosemide using a concentration of 40 mg/2 mL, one can use the formula: Volume = Dose / Concentration. In this case, the required volume is 120 mg divided by (40 mg/2 mL), which equals 6 mL.

A (1) YOUR ANSWER

Choosing 1 mL would only deliver 20 mg of furosemide, calculated as (40 mg/2 mL) * 1 mL. This is significantly less than the required 120 mg, making this choice incorrect.

B (3) YOUR ANSWER

Selecting 3 mL would yield 60 mg of furosemide, calculated as (40 mg/2 mL) * 3 mL. While closer, this volume still does not meet the required dose of 120 mg, thus rendering it incorrect.

C (6) CORRECT

The correct amount of 6 mL delivers the needed 120 mg of furosemide, calculated as follows: 40 mg/2 mL means there are 20 mg/mL, and 120 mg requires 6 mL (120 mg ÷ 20 mg/mL = 6 mL). This calculation confirms that this choice is accurate and meets the dosing requirement.

D (12) YOUR ANSWER

Choosing 12 mL would provide 240 mg of furosemide, calculated as (40 mg/2 mL) * 12 mL. This exceeds the required 120 mg, leading to a potential overdose, and is therefore an incorrect option.

Conclusion

To accurately dispense the ordered dose of furosemide, the calculation reveals that 6 mL of the stock solution is necessary to achieve the 120 mg requirement. The other options either underdose or overdose the patient, emphasizing the importance of correct volume calculations in medication administration.

An order for furosemide 120 mg IV STAT will be dispensed using furosemide 40 mg/2 mL. What volume in mL of the stock injection will be required to deliver the requested dose?

6 mL of the stock injection will be required to deliver the requested dose of furosemide.

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