Question

15) A nurse hangs a bag of D51/2 NS with 20meq kel. The bag is a 1 liter bag and needs to be infused at 120m/hour. She needs to deliver a bolus of fluid first of 200ml to be infused in 30 minutes before she can run the regular IV rate. She has an IV set that is 10gtts/ml. She gets off work at 6pm and wants to know if she will need another bag of IV fluids before she leaves work It is currently noon. The bag of fluids will run out at what time? In international or military time??

Answer 1

15) Total volume of fluid D51/2 is 1liter that is 1000ml

Start time is noon by 2pm

Flow rate is 120ml/hour

200 ml of fluid initially is given bolus in 30mins

Then ,200ml + 120 ml × (from 2.30 pm to 6pm ) total time till then is equal to 3.30hrs .

So, total amount infused in 3.30hrs = 120+ 120+ 120 +60 = 420ml + 200ml(given initially) = 620ml of fluid infused till 6pm

Then out of 1000ml ,620 ml will be infused till 6pm and remaining fluid will finish/ run out by 21:15pm ( 60+120+120+80)ml in 3:15hrs.

She will not need another bag of IV fluid before she leaves work at 6pm.