Question

1. A patient is to be given 650 ml of a drug over a 5-hour period at 20 drops/ml. what will be the drip rate expressed in gtts/min? round to the nearest whole number

2. Your patient has been receiving digoxin (lanoxin) 125 mcg Q Am. Today his doctor writes a new order? Digoxin 0.25 my PO Q Am start now. how many 125 mcg tablets will you administer?

3. At the change of shift you notice 200 ml left to count in the I.V bag. The I.V is infusing at 80 ml/hr. how much longer will the I.V run? (express your answer in hours and minutes).

4. The physician writes an order for Heparin 900 units/hr. The label on the I.V bag reads: Heparin 10,000 units in 500 ml D5W. How many ml/hr will deliver the correct dose?

5. The order: Amoxicillin 125 mg p.o every 8 hours for 10 days. The child weighs 40 pounds. Label reads: 125 mg/5ml. safe range is 20-40 mg/kg/day in divided doses q8h. what is the safe dose range for the child? (round to the nearest whole number) is this dose safe?

6. Give regular insulin by continuous i.v infusion at 20 units/hr. The solution is 250 ml NS with 250 units of regular insulin. how many ml/hr will deliver the correct dose?

7. order: Lorazepam (Ativan) 0.5 mg i.v . supply: vial labeled Lorazepam 1mg/ml. Dilute with 1 ml sterile water to yield 1 mg/2ml. what is the quantity to administer?

8. order: infuse 10% lipids 500 ml over 10 hours. what is the quantity to administer per hour?

9. order: 500 ml D5W i.v at 50 ml/hr. how many hours will the i.v run?

Answer 1

1. Answer;

Given volume = 650ml
time = 5 hr
drop factor = 20 gtts/ml
According to the basic formula, it should be derived as flow rate = 650 x 20 / 5 x 60
= 43.33
Hence the flow rate is 43 gtts/ min

2. Answer ;

Drug dosage = 125 mcg
Ordered drug dose = 0.25 mg, that is 250 mcg

So the number of tablet should be administered = 250 /125
= 2 tablets.

3. Answer ;

Volume remaining = 200 ml
Infusion rate = 80 ml / hr
Hence the time it will take to complete is = 200 / 80
= 2.5 , ie) 2 hour and 30 mins.

4. Answer ;

500 ml D5W contain 10,000 units of heparin.
So 1 ml contain 20 units.
Doctor order amount = 900 units, ie) 45 ml

So the appropriate delivery amount is 45ml /hr