Evolve HESI Practice Exam

When administering furosemide (Lasix) 15 mg IV stat, how many milliliters should the nurse dispense given a concentration of 20 mg/2 ml?

1. 3 ml

2. 1 ml

3. 1.5 ml

4. 2.5 ml

The correct answer is: 1.5 ml

To determine how many milliliters of furosemide to administer, it is essential to understand the provided concentration and the required dosage. The concentration of furosemide is 20 mg per 2 ml. To find out how many milliliters are needed for a 15 mg dose, one can set up a proportion based on the concentration. Given that 20 mg is present in 2 ml, we can first calculate how much volume corresponds to 15 mg by using a simple ratio. 1. Calculate how many milligrams are in 1 ml: - 20 mg / 2 ml = 10 mg/ml. 2. Now, to find how many milliliters are needed for 15 mg: - Since 1 ml contains 10 mg, we can divide the required dose by the concentration per ml: - 15 mg / 10 mg/ml = 1.5 ml. Thus, administering 1.5 ml will ensure the patient receives the correct dose of 15 mg of furosemide. This calculation reflects the appropriate methodology for dose calculation in clinical settings, emphasizing the importance of understanding and applying concentrations accurately.