IV Calculations (Pump or Flow rates) Questions and Answers

IV Calculations (Pump or Flow rates)
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1. The physician orders 40 mEq of potassium chloride in 250 mL 0.9% NS to
infuse over 2 hours. Calculate the flow rate in milliliters per hour.: 125mL/hr

CALCULATION:
250mL/2hrs
2. Zyvox 600 mg IV once a day is ordered for a patient. The Zyvox is dissolved
in 150 mL of NS and should infuse over 90 minutes. Using an IV controller,
how many milliliters per hour should the Zyvox be infused?: 100mL/hr

CALCULATION:
Convert 90 minutes to hours (90min/60min)= 1.5 hours
150mL/1.5hr
3. The physician orders erythromycin 1 g in 100 mL of D5W to infuse in 45
minutes. Calculate the flow rate in milliliters per hour.: 133.33 mL/hr or
133 mL/hr

CALCULATION:
Convert 45 minutes to hours (45min/60min)= 0.75 hours
100mL/0.75hr
4. The patient has Levaquin 500 mg ordered once daily. The Levaquin is avail-
able in 100 mL of NS and should infuse over 60 minutes. Using an IV pump,
how many milliliters per hour should the Levaquin be infused?: 100mL/hr

CALCULATION:
Convert 60 minutes to hours (60min/60min) = 1 hour
100mL/1hr
5. The physician orders a continuous IV Dilaudid drip at 1 mg/h. The med-
ication is supplied in 10 mg/100 mL. Calculate the flow rate in milliliters per
hour.: 10 mL/hr

CALCULATION:
1mg/10mg*100mL
**NOTE** When the order is given as dose/hr you revert back to the basic formula
used for oral dosage. In this question the order was for 1mg/hr or dose per hour
6. The physician orders 20 mEq of potassium chloride in 75 mL 0. 9% NS to
infuse over 3 hours. Calculate the flow rate in milliliters per hour.: 25mL/hr

CALCULATION:
75mL/3hr
1/5

, IV Calculations (Pump or Flow rates)
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7. The patient has D5W 1750 mL ordered over 10 hours. Using an IV pump, how
many milliliters per hour should the IV fluids infuse?: 175mL/hr

CALCULATION:
1750mL/10hrs
8. The physician orders Pepcid 40 mg IVPB every 12 hours. The medication is
supplied in 40 mg/100 mL to infuse over 30 minutes. Calculate the flow rate in
milliliters per hour.: 200ml/hr

CALCULATION:
100mL/0.5 hour
9. TPN 1500 mL is ordered to infuse over 12 hours. Using an IV controller, how
many milliliters per hour should the TPN infuse?: 125mL/hr

CALCULATION:
1500mL/12hrs
10. The physician orders a continuous IV Dilaudid drip at 0.75 mg/h. The
medication is supplied in 15 mg/100 mL. Calculate the flow rate in milliliters
per hour.: 5 mL/hr

CALCULATION:
0.75mg/15mg*100mL
**NOTE** When the order is given as dose/hr you revert back to the basic formula
used for oral dosage. In this question the order was for 0.75mg/hr or dose per hour
11. The physician gives orders to infuse 1 unit (250 mL) of packed red blood
cells over 3 hours. Calculate the flow rate in milliliters per hour.: 83.33mL/hr or
83mL/hr

CALCULATION:
250ml/3hr
12. The physician gives orders to infuse 1 L of lactated Ringer's in 15 hours.
Calculate the flow rate in milliliters per hour.: 66.66mL/hr or
67mL/hr

CALCULATION:
Convert 1L to mL = 1000mL
1000mL/15hr
13. Azithromycin 500 mg IV once a day is ordered for a patient. The
azithromycin is dissolved in 250 mL of NS and should infuse over 45 minutes.
2/5