Examkin

Soru

Zorluk: OrtaPharmacological and Parenteral Therapies

A client admitted to the intensive care unit with acute decompensated heart failure is prescribed a continuous intravenous infusion of dobutamine at 7.57.5 mcg/kg/min. The client weighs 176176 lb. The medication is supplied by the pharmacy as dobutamine 500500 mg in 250250 mL of 5%5\% dextrose in water. At what rate in mL/hr should the nurse set the infusion pump? (Record your answer using a whole number.)

Cevap: 18 mL/hr

Cevap

The nurse should set the infusion pump to deliver 18 mL/hr.
To determine the correct IV pump setting in mL/hr, first convert the weight to kilograms (176÷2.2=80176 \div 2.2 = 80 kg). Next, calculate the dose per minute (7.5×80=6007.5 \times 80 = 600 mcg/min), then convert to the hourly dose (600×60=36,000600 \times 60 = 36,000 mcg/hr). Convert this to milligrams (36,000÷1000=3636,000 \div 1000 = 36 mg/hr). The concentration of the IV bag is 22 mg/mL (500500 mg ÷250\div 250 mL). Finally, divide the required hourly dose by the concentration (36÷2=1836 \div 2 = 18 mL/hr).

Adım Adım Çözüm

1
Convert the client's weight from pounds to kilograms.
176÷2.2=80176 \div 2.2 = 80 kg
The medication is prescribed based on weight in kilograms (mcg/kg/min).
2
Calculate the total dose required per minute.
7.5×80=6007.5 \times 80 = 600 mcg/min
This establishes the total amount of dobutamine the client needs every minute.
3
Convert the minute dose to an hourly dose.
600×60=36,000600 \times 60 = 36,000 mcg/hr
The final pump rate must be programmed in mL/hr, so the dose must be calculated per hour.
4
Convert the hourly dose from micrograms to milligrams.
36,000÷1000=3636,000 \div 1000 = 36 mg/hr
The supplied medication concentration is provided in milligrams (mg), so the units must match.
5
Calculate the concentration of the supplied medication.
500÷250=2500 \div 250 = 2 mg/mL
This determines how many milligrams of dobutamine are in each milliliter of the IV fluid.
6
Calculate the final infusion pump rate.
36÷2=1836 \div 2 = 18 mL/hr
Dividing the required hourly dose by the concentration yields the volume required per hour.

Anahtar Kavram

Weight-based intravenous infusion calculation requires converting weight to kilograms, determining the hourly medication requirement, and applying the supplied concentration to find the volume per hour.
Bu soruyu puanla

Konular

Pharmacological and Parenteral Therapies

Bu konudan daha fazla soru