Intravenous Calculations
Calculate Flow Rate 2,000 mL in D5W in 24 hours by infusion pump
2,000/24 x= 83.3 mL/hr
Calculate Flow Rate 100 mL 0.45% NS in 45 min by infusuin Remember: mL/time * 60
100mL/45 min * 60 min 100 mL/45 x= 2.222 x= 2.222/60 x= 133 mL/hr
Calculate flow rate Infuse 150 mL of D5W in 2 hr. The drop rate is 20 gtt/mL Remember: mL/time * gtt/60
150 mL/2 hr x= 75 75 * 20 x= 1,500 1,500/60 x= 25 gtt/hr
Calculate flow rate for gtt/min An IV medication in 60 mL D5W is to be administered in 30 minutes. The drop factor is a microdrop Remember: mL * gtt/time
60 mL * 60 x= 3,600 3,600/30 x= 120
Calculate the Drop Factor constant 20 gtt/ml Remember: 60/gtt
60/20 gtt/ml x= 3
Calculate flow rate Administer D5RL at 75 mL/hr. The drop factor is 10 gtt/mL Remember: mL/time * 60
75 mL * 10 gtt/10 gtt/mL /60 min 75 mL* 10 gtt/mL x= 750 x=750/60 x= 12.5 Round up to 13
Calculate flow rate 1,000 mL of Ringer lactate solution (RL) to infuse in 16 hr. The drop rate factor is 15 gtt/mL Remember: mL/time * gtt/60
1,000 mL/16 hr x= 62.5 round to 63 mL/hr 63 mL * 15 gtt/mL x= 945 945/60 x= 15.75 round up to 16 gtt/mL
Recalculate the IV flow rates in gtt/min rates 500 mL of 0.9% NS was ordered to infuse in 8 hrs at the rate of 16 gtt/min. The drop factor is 15 gtt/mL. After 5 hrs you find 250 mL of fluid left. Remember: New mL * New 15 gtt/gtt difference * 60 old gtt - new gtt = answer/ old gtt = answer * 100
250 mL * 15 gtt/3 * 60 3,750/18 x= 20.8 or 21 gtt 16 gtt - 21 gtt = -5/16 0.312 * 100 x= 31%
Client with an infusion pump has an order for 3,000 mL D5W over 24 hours 1) Think: pump is regulated in mL/hr 2) Set up in formula using Formula Method
3,000 mL/24 hr x= 125 mL/hr
Calculate Flow Rate 30 mL of antibiotic in 0.9% NS in 20 min by infusion pump Remember: mL/time * 60
30 mL/20 min * 60 30 mL/20 min x= 1.5 * 60 x= 90 min
Determine infusion time An IV of 500 mL NS is to infuse at 60 mL/hr Remember: ordered mL/remaining mL
500 mL/60 mL x= 8.33 .33 * 60 x= 19.8 round up to 20 infusion time = 8 hr 20 min
Solve for the unknown You find that there is 150 mL of D5W left in an IV. The IV is infusing at 60 macrograms/min. How many hours will the fluid last? Remember: x gtt/min= mL * DF/time
60= 150 * 60 x= 9,000 9,000/60 x= 150 = 2 hours 30 min
Solve for the unknown There is 90 mL of D5 0.33% NS left in an IV that is infusing at 60 macrograms/min. The drop factor is 60 gtt/mL. How many hours will the fluid last? Remember: x gtt/min= mL * DF/time
60= 90 mL * 60 x= 5,400 5,400/60 x= 90 = 1 hour 30 minutes
Calculate The rate flow in gtt/min Order: Dextrose 5% with ringer lactate solution (D5RL) with 20 units pictcoin for 2 L at 125 mL/hr. Drop factor: 15 gtt/mL Remember: x gtt/min = mL * mL/60
x gtt/min= 125 mL/hr * 15 gtt/mL x= 1,875 1,875/60 x= 31.25 round down 31 gtt/hr
Calculate order to infuse Order: Ti infuse in 16 hr. Drop factor: 10 gtt/mL D5w 500 mL with 10 mEq KCL D5W 1,000 mL D5W 1,000 mL with 1 ampule MVI (multivitamin) Remember: total mL * gtt; time * 60; divide
2,500 mL * 10 gtt/ 16 * 60 x= 25,000 x= 960 25,000/960 x= 26.04 round down 26 gtts
Recalculate the IV flow rates in gtt/min rates 250 mL of D5W was to infuse in 3 hrs at a rate of 21 gtt/min. Drop factor: 15 gtt/mL. With 1 1/2 hr remaining, you find 200 mL left. Remember: New mL * New 15 gtt/gtt difference * 60 old gtt - new gtt = answer/ old gtt = answer * 100
200 mL * 15/ 1.5 * 60 3,000/ 90 x= 33.33 or 33 gtt/min 33 gtt - 21 gtt 12/21 0.5714 * 100 x= 5714 or 57 %
Calculate the rate in gtt/min for meds being administered IVPB Order: Ampicillin 1 g is added to 50 mL D5W to infuse over 45 minutes. Drop factor: 10 gtt/mL. For IV reconstitute 10 mL of diluent to get 1 g per 10 mL Remember: TOTAL mL * gtt/time given
60 mL * 10 x= 600 600/45 x= 13 gtt/min
Calculate flow rate An IV mediation in 60 mL of 0.09% NS is to be administered in 45 minutes. The drop factor is a microgram Remember: mL * gtt/time
60 mL * 60 gtts/45 min x= 3,600 3,600/45 minutes x= 80
Calculate the rate in gtt/min using the shortcut method Order: RL 50 mL/hr Drop factor: 15 gtt Remember: 60/gtt * mL/constant
60 min/ 15 gtt x= 4 50/4 x= 12.5 round up to 13 gtt
Calculate the rate in gtt/min using the shortcut method Order: D5W 200 mL/hr Drop factor: 10 gtt Remember: 60/gtt * mL/constant
60 min/10 gtt/mL x= 6 200/6 x=33.333 round to 34
Calculate flow rate Administer 1,000 mL D5 0.33% NS in 6 hr. The drop factor is 15 gtt/mL Remember: mL/time * gtt/60
1,000 mL/6 hr x= 166.67 166.67 * 15 gtt/mL x= 2,500.05 2,500.05/60 min x=41.6675 Round up to 42 gtt/mL
Calculate Flow Rate 1,800 mL of D5W in 24 hours by infusion pump
1,8000/24 x= 75 mL/hr.
Calculate The rate flow in gtt/min Order: 1,000 mL D5 0.9% NS for 3L at 100 mL/hr. Drop factor: microdrop Remember: Look for the mL attached to time mL * gtt/60
100 mL * 60 x= 6,000 6,000/60 x= 100 gtt/min
Solve for the unknown 0.9% NS is infusing at 35 macrograms/min. The drop factor is 15 gtt/mL. How many millitiers of fluid will the client receive? Remember: x gtt/min= mL * DF/time
35= 15 * x/60 * 5 35/1 = 15x/ 300 35 * 300 x= 10,500 10,500/15x x= 700 mL
Solve for the unknown 180 mL of D5 RL is left in the Iv that is infusing at 45 macrogtt/min. The drop factor is 15 gtt/mL. How many hours will the fluid last? Remember: x gtt/min= mL * DF/time
45 = 180 mL * 15 gtt/x 45 = 27,00/x 27,00/45x x= 60 = 1 hour
A client on an infusion pump is to receive an antibiotic in 50 mL of 0.9% NS over 30 minutes 1) Think: The pump infuses in mL/hr. Use dimensional analysis to determine mL/hr 2) Set up porblem
50 mL/30 min x= 1.667 = 1.667*60 min x= 100 min
Calculate the Drop Factor constant 10 gtt/ml Remember: 60/gtt
60 min/10 gtt/ml x= 6
Calculate The rate flow in gtt/min Order: D5W 1,000 mL + 20 mEq KCL for 2L to infuse in 10 hr. Drop factor: 15 gtt/mL Remember: x gtt/min= ml * gtt/60
Convert 2L 2,000 mL/10 x= 200 200 * 15 x= 3,000 3,000/60 x= 50
