Physician orderd dose: Verapamil HCI 12 mg IVP over 4 minutes
Dose available: Vreapamil HCI 2.5mg/mL
How many mL should be administrated every 30 seconds?
The correct answer and explanation is :
To calculate the volume of Verapamil HCl that should be administered every 30 seconds, follow these steps:
- Determine the total volume needed:
- The prescribed dose is 12 mg.
- The available concentration is 2.5 mg/mL.
- Using the formula:
[
\text{Volume} = \frac{\text{Dose ordered}}{\text{Concentration available}}
]
[
\text{Volume} = \frac{12 \text{ mg}}{2.5 \text{ mg/mL}} = 4.8 \text{ mL}
] - So, 4.8 mL must be administered over 4 minutes.
- Calculate the volume per minute:
- Since 4.8 mL is given over 4 minutes, the rate per minute is:
[
\frac{4.8 \text{ mL}}{4 \text{ min}} = 1.2 \text{ mL/min}
]
- Determine the volume per 30 seconds:
- 1 minute has 2 intervals of 30 seconds, so the amount per 30 seconds is:
[
\frac{1.2 \text{ mL}}{2} = 0.6 \text{ mL}
]
Final Answer:
Administer 0.6 mL every 30 seconds over 4 minutes.
Explanation:
Verapamil is a calcium channel blocker used for treating arrhythmias, hypertension, and angina. It is essential to administer it slowly to prevent adverse effects like hypotension or bradycardia. The ordered dose is 12 mg, and the available concentration is 2.5 mg/mL, so 4.8 mL must be given over 4 minutes. Dividing this volume evenly over the timeframe ensures safe administration. Every 30 seconds, 0.6 mL should be pushed IVP.
