TEST 3-IV Calculations

1000

1 L = _________ml

Drip rate/ Drip factor = ml/min 33 gtts/min / 10 gtts/ml=3.3mls/min x60= 198mls/hr

1. Your patient has an IV running via tubing with a drip factor of 15 gtt/ml. The IV is dripping 30 drops every minute. How many ml/hr is the patient receiving? For this type of problem what type of formula would you use? Answer

1500/16= 94 ml/hr 1500/960min= 1.6 ml/min 1500/960 min x 10= 16

8. A postpartum patient is to receive Ringer's lactate 1500 ml within 16 hours. Drop factor is 10 gtt/ml. _______ml/hr _______ml/min _______gtt/min

total volume (mL) ÷ flow rate (mL/hr) 150ml. 25ml/hr (remember metics get cancelled out): 6hrs 9:10AM

A volume of 150 ml of NS is to infuse at 25 ml/hr. a. Calculate the infusion time. What formula do we use to calculate the infusion time? b. The IV was started at 3:10 AM. What time will the IV be complete?

Since we're looking for ml/hr, we would use the formula: Drip rate/ Drip factor = ml/min, but since we don't have either drip rate or drip factor and instead, we're dealing with units, we simply do cross multiply in order to cross out the different units of measurement Answer: 11units/hr =100ml/ 100 units = 11ml/hr

Doctors order: 11 units/hr of insulin. The IV solution contains 100 units insulin in 100 ml of normal saline solution. How many ml/hr should the infuse?

fast, big

Drip rate tells how _________ it drips per minute. Drop Factor tells how __________ the drops are.

gtts/min gtts/hr/

Drops per minutes = Drops per hour=

ml/hr=volume/ xhrs ml/min= volume/ xhrs given in MINUTES gtt/min= vol/time x drop factor

How can you find the ml/hr of an IV problem if the volume is given to you? ml/min? gtts/min?

multiply by 60

How to convert hour to minute

Divide by 60 600 minutes / 60= 10hrs

How to convert minutes to hours

Divide by 60 4800 seconds = (36000 ÷ 60) minutes= 600 minutes

How to convert seconds to minute

administer

Infuse =

60 gtts/min

Microdrip (smallest) =

whole

Since a fraction of a drop is not possible to give to a patient, it is usual to round the answers to the nearest _________ number. But when you use an infusion pump, you will have to round with decimals. ex: 12.5 gtts/min = 13 gtts/min 12.3 gtts/min= 12 gtts/min

Drip Rate(gtts/min) Vol (ml)/Time(min)x drop factor

This formula is used if your volume (ml), time (min), and drop factor is given and you need to find the drip rate (flow rate) gtts/min

Drip rate/ drop factor x time = volume

This formula is used when you are not given the volume but you have the drip rate, drip volume and time.

Drip rate/ Drip factor = ml/min

Use this formula when you need to find both the volume and time in a problem

How many mls in the past minute

What does ml/min

50 ml 60 min (1hr) drip factor: 10 gtt/ml 50ml/60min x 10gtt/ml =8gtt/min

You have a patient whose IV is to run at 50 ml/hr. The drop factor of the tubing is 10gtt/ml. How fast should the IV drip to deliver 50 ml each hour? Vol: Time: drop factor:

D 10 .2 NSS with 20 meq KCL and 1000 units of heparin/L

You receive a status post aortic valve replacement patient with orders for D 10 .2 NSS with 20 meq KCL and 1000 units of heparin/L at 10 ml/hr. Drop factor is 60 gtt/ml. _______ml/hr _______ml/min _______gtt/min. What parts of this problem is irrelevant?

Vol: 10ml Time: 60 min, (1hr) Drop factor: 60 gtts/ml ml/hr= 10/1= 10 ml/hr ml/min= 10/60= 0.17 ml/min gtts/min= 10/60 x 60= 10 gtts/min

You receive a status post aortic valve replacement patient with orders for D 10 .2 NSS with 20 meq KCL and 1000 units of heparin/L at 10 ml/hr. Drop factor is 60 gtt/ml. _______ml/hr _______ml/min _______gtt/min. Answer this problem and find: Vol: Time: Drop factor:

-total volume (mL) ÷ infusion time (hr) -total volume (mL) ÷ flow rate (mL/hr) -flow rate (mL/hr) × infusion time (hr)

flow rate (mL/hr) = infusion time (hr) = total volume (mL) =

Drip Rate

gtts/min=

Drop factor

gtts/ml