Chapter 22: Intravenous Calculations
COMPLETION
1. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
1,000 mL D5W infusing at 90 mL/hr
a. Determine the infusion time: _____
b. The IV was started at 2:00 AM. When will the infusion be complete? _____
ANS:
a. 1,000 mL ÷ 90 mL/hr = 11.11 hr
60 min 0.11 hr = 6.6 = 7 min
Infusion time: 11 hr 7 min
b. 1:07 PM; 1307
PTS: 1 MSC: IV Calculations
2. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
750 mL lactated Ringer solution at 80 mL/hr
a. Determine the infusion time: _____
b. The IV was started at 7:00 AM. When will the infusion be complete? _____
ANS:
a. 750 mL 80 mL/hr = 9.38 hr
60 min 0.38 hr = 22.8 = 23 min
Infusion time: 9 hr 23 min
b. 4:23 PM; 1623
PTS: 1 MSC: IV Calculations
3. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
250 mL 0.9% NS at 30 mL/hr
a. Determine the infusion time: _____
b. The IV was started at 7:00 PM. When will the infusion be complete? _____
ANS:
a. 250 mL 30 mL/hr = 8.33 hr
60 min 0.33 hr = 19.8 = 20 min
Infusion time: 8 hr 20 min
b. 3:20 AM; 0320
, PTS: 1 MSC: IV Calculations
4. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
100 mL D5 /2 NS at 40 mL/hr
a. Determine the infusion time: _____
b. The IV was started at noon. When will the infusion be complete? _____
ANS:
a. 100 mL ÷ 40 mL/hr = 2.5 hr
60 min 0.5 hr = 30 min
Infusion time: 2 hr 30 min
b. 2:30 PM; 1430
PTS: 1 MSC: IV Calculations
5. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
150 mL D5W 1/2 NS infusing at 20 macrogtt/min. Drop factor: 15 gtt/mL.
Calculate the infusion time: _____
ANS:
15 gtt : 1 mL = 20 gtt : x mL
x = 1.33 = 1.3 mL/min
60 min 1.3 mL/min = 78 mL/hr
150 mL ÷ 78 mL/hr = 1.92 hr
60 min 0.92 hr = 55.2 = 55 min
Infusion time: 1 hr 55 min
PTS: 1 MSC: IV Calculations
6. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
60 mL of IV fluid with medication infusing at 50 macrogtt/min. Drop factor is 10 gtt/mL
Calculate the infusion time: _____
ANS:
10 gtt : 1 mL = 50 gtt : x mL
x = 5 mL/min
60 mL ÷ 5 mL/min = 12 min
Infusion time: 12 min
PTS: 1 MSC: IV Calculations
COMPLETION
1. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
1,000 mL D5W infusing at 90 mL/hr
a. Determine the infusion time: _____
b. The IV was started at 2:00 AM. When will the infusion be complete? _____
ANS:
a. 1,000 mL ÷ 90 mL/hr = 11.11 hr
60 min 0.11 hr = 6.6 = 7 min
Infusion time: 11 hr 7 min
b. 1:07 PM; 1307
PTS: 1 MSC: IV Calculations
2. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
750 mL lactated Ringer solution at 80 mL/hr
a. Determine the infusion time: _____
b. The IV was started at 7:00 AM. When will the infusion be complete? _____
ANS:
a. 750 mL 80 mL/hr = 9.38 hr
60 min 0.38 hr = 22.8 = 23 min
Infusion time: 9 hr 23 min
b. 4:23 PM; 1623
PTS: 1 MSC: IV Calculations
3. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
250 mL 0.9% NS at 30 mL/hr
a. Determine the infusion time: _____
b. The IV was started at 7:00 PM. When will the infusion be complete? _____
ANS:
a. 250 mL 30 mL/hr = 8.33 hr
60 min 0.33 hr = 19.8 = 20 min
Infusion time: 8 hr 20 min
b. 3:20 AM; 0320
, PTS: 1 MSC: IV Calculations
4. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
100 mL D5 /2 NS at 40 mL/hr
a. Determine the infusion time: _____
b. The IV was started at noon. When will the infusion be complete? _____
ANS:
a. 100 mL ÷ 40 mL/hr = 2.5 hr
60 min 0.5 hr = 30 min
Infusion time: 2 hr 30 min
b. 2:30 PM; 1430
PTS: 1 MSC: IV Calculations
5. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
150 mL D5W 1/2 NS infusing at 20 macrogtt/min. Drop factor: 15 gtt/mL.
Calculate the infusion time: _____
ANS:
15 gtt : 1 mL = 20 gtt : x mL
x = 1.33 = 1.3 mL/min
60 min 1.3 mL/min = 78 mL/hr
150 mL ÷ 78 mL/hr = 1.92 hr
60 min 0.92 hr = 55.2 = 55 min
Infusion time: 1 hr 55 min
PTS: 1 MSC: IV Calculations
6. Directions: Determine the infusion time for the following IV. State time in both traditional
and military time. Round minutes to the nearest whole number of minutes.
60 mL of IV fluid with medication infusing at 50 macrogtt/min. Drop factor is 10 gtt/mL
Calculate the infusion time: _____
ANS:
10 gtt : 1 mL = 50 gtt : x mL
x = 5 mL/min
60 mL ÷ 5 mL/min = 12 min
Infusion time: 12 min
PTS: 1 MSC: IV Calculations
