I need some help on a math problems!! involving units, Pepcid and Flow rate.

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How many mL solution will the patient receive in 24 hours from a 500mL bag if the rate is 40mL/hr?

How many mL of drug if you need 20mg if the vial contains 10mg/mL? How much mL of NS do you need to add to have a total volume of 10mL?

so far for the mL solution i did 500ml/40mlhr =12.5 hr. then i did 500 ml/ 12.5 hr = 40 ml/hr Im stuck after what im supposed to do next.

Close.

Start with how much fluid is needed for a 24 hour period. You are focusing on the wrong piece of information for this part.

So: 40m/hr x 24hrs = ____mL infused over 24 hours.

Then figure out how many units per mL: 20,000 units heparin / 500 mL = ____ units heparin per mL

To get the final answer: ____ mL over 24 hours x ___ units heparin/mL = ____ units heparin over 24 hours.

so for step 1 i did 40ml x 24 hours = 960

then for step 2 i did 20,000/ 500 = 40

then did 960 x 40 = 38,400 units/24 h

so for step 1 i did 40ml x 24 hours = 960

then for step 2 i did 20,000/ 500 = 40

then did 960 x 40 = 38,400 units/24 h

Exactly. Now try the others. Look at what answer you are seeking to determine which information you have/need rather than assuming all the information in the initial statement is needed for each step.

2. A patient's order for Pepcid states that she should reveive an IV bolus of 20mg Pepcid diluted in NS to a total volume of 10ml, which is to be injected over 2 minutes. The supply is Pepcid 10mg/ml.

Compute the volume of Pepcid and the volume of NS.

If each ml of Pepcid has 10mg in it, then you would need 2 mls to get a 20 mg dose. If your total volume is not to exceed 10 ml, then two mls of Pepcid and 8 mls of NSS would combine to make 10 mls of solution. Don't think too hard!

3.. Order: Pepcid 20mg added to 100ml D5W IV in 30min. q. 12h An infusion pump will be used.

Supply: Pepcid 10mg/ml

Compute the volume of Pepcid to be added to the 100ml D5W.

Compute the flow rate.

Again, 2 ml = 20mg. Add this to your 100cc of D5W and your pump should be set to 200cc/hr (100/0.5)

as 30 minutes in hours is 0.5. Flow rate is 204cc/hr if you wanted to add the 2 mls to your volume.