Question

Ray Chan, age 24, is involved in a multiple car accident. Mr. C was wearing a seatbelt; air bag was activated. Mr. C was airlifted to the nearest trauma 1 hospital. Injuries included 3 broken ribs, broken sternum, broken left femur, contusions, open scalp wound of 4 cm. N/G tube was inserted. No previous medical history. (Topics covered: calculating basic IV drip rates on an infusion pump, determining hours an IV will run, adding medications to continuous IVs, enteral feeding, recording IV intake.)

1. Medication order: 1 L D5W ½ NS with 20 mEq KCl at over 12 hours

Calculate the doses (round the infusion rates to the nearest whole number):

D5W ½ NS. Supply: KCl 40 mEq/20 mL. How many mL to add to the IV? What is the infusion rate on the pump? Fluids were started at 10 am, when will the IV be complete?

2. Medication order: ceftazidime 1.25 g in 100 mL IVPB every 8 hours, infuse over 30 minutes.

Calculate the doses (round the infusion rates to the nearest whole number):

Ceftazidime. Supply: Available: 2 g vial, reconstitution yields 2 g/10 mL. How

many mL to add to the IV? What is the infusion rate on the pump?

3. Medication order: ampicillin 750 mg in 50 mL IVPB IV every 6 hours, infuse over 30 minutes.

Calculate the doses (round the infusion rates to the nearest whole number):

Ampicillin. Supply: 1.5 g vial. Reconstitution yields 1.5 g/4 mL. How many mL to add to the IV? What is the infusion rate on the pump?

4. Medication order: Tube feedings: administer ¼ strength Isocal at 60 mL/hour, total volume 240 mL.

Calculate the doses (round the infusion rates to the nearest whole number):

How much water to add to make ¼ strength Isocal? How much Isocal? What is the total fluid intake for 24 hours?

5. The nurse mixes 60 mL of water with 180 mL of Isocal. What error could happen?

Answer 1

mL per hour to infuse=take the total volume in mL/total time in hours.

Amount of drug to be administered

D/H x Q = x, or

Desired dose (amount) = ordered Dose amount/amount on Hand x Quantity.

ordered dose=20 meq

amount on Hand=40meq

quantity =20ml

Desired dose=20 x20 /40

=400/40=10 ml to be added to 1 L D5W ½ NS

=1 itre=1000ml

mL per hour to infuse=take the total volume in mL/total time in hours.

so 1010 ml to be infused over 12hours

1010ml/12=84ml/hr

Number of drops infused per minute.

Formula: total milliliters ÷ total minutes x drip factor in gtt/ml.

Drop rate = Drop factor x Volume/60 x Time (hours)

Drop factor=20gttt

20x1100/12x60=30.5 drops/minute=31

10am+12=22 that means 10pm it should finish