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.)

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?

Answer 1

The ml to be add you the IV is 2 ml

Explanation:

1vial contains 1.5 gm=1500gm

Reconstituition yield is 1500 gm / 4ml

Therefore 750 gm is it's half is equal to 2 ml

Infusion rate on pump is 1.7 ml

Explanation:

750 mg in 50 ml over 30 minutes

Total fluid is 50 ml +2 ml =52ml

52ml to be given in 30 minutes

So in 1 minutes the fluid to be given is,

52÷30=1.7 ml