Question

For 11 and 12, calculate the flow rate in gtt/min for the following infusions. Round rates to the nearest whole number. Show your work using Dimensional Analysis 11. Ceftriaxone 1 g in 100 mL over 60 minutes using a 20 gt/mL macro drip set. DA: 11. 12. Cefazolin 500 mg in 50 ml. to be given over 30 minutes using a mini (micro) drip set. DA: 12. 13. Drug X, 600 mg per 200 mL.. Existing flow rate: 25 mL/hr. Calcualte a.) mg per mL concentration: 13 a.) 13 b.) b.) mg per minute flow rate: 14. Ordered: Vancomycin 1.5 g diluted in 500 mL. Directions: Administer in mL/hr over 90 minutes via an infusion pump. DA: 14. 15. The least accurate method for administering intravenous fluids is by calculating: a) gtt/ min (gravity) flow rate b) mL/hr (electronic infusion device ElID) flow rate c) the intrathecal route 16. How does the nurse determine the number of gtt/ml. (drop factor) for a gravity infusion line? a) Refer to your Nursing Drug Guide. b) Call the agency pharmacist c) Ask an experienced nurse on the unit. d) Read the drop factor on the IV tubing packaging

Answer 1

11.Medication :Ceftriaxone

Dose:1gm

Volume:100ml

Drop factor:20gtt/min

Time:60 minutes

Flow rate:Total volume × Drop factor÷Time(hr)×60

= 100×20÷1×60

=33.3 (33)

Ans:33gtt/min

12.Medication :Cefazolin

Dose:500mg

Volume:50ml

Time :30 minutes

Drop factor (micro)60gtt /min

For 1 hour

Flow rate=Total volume ×Drop factor÷Time(hr)×60

=50×60÷1×60

=50gtt/minute

For 30 minute the rate will be faster (double to be infused in a minute)

50×2=100

Ans:100gtt/min

23:Medication :Drug X

Dose :600mg

Volume:200ml

Flow rate:25ml/hr

So the total fluid will be transfused in 8 hr (200÷25)

Now 600mg will be transfused in 8 hr

So 1 hr=??

=75mg/hr (600÷8×1)

That is 25ml=75mg

Then 1ml=??

=3(75÷25×1)

Ans:A.3mg

b.mg per minute

As 75mg=1hour (60min)

Then??=1 min

1.25mg/min (75×1÷60)

Ans:B.1.25mg/min

14.Medication :vancomycin

Dose:1.5g

Volume :500ml

Time:90min

If 90 minutes =500ml

So 60 minutes =??

Cross multiply and divide

=500×60÷90

=333.3 or 333

Ans:In 1 hour 333ml will be infused