Question

How to solve these problems?

The patient is receiving 0.8 ml of Heparin subcutaneously bid. How many units of Heparin is the patient receilving with each dose if it comes 10,000 units/ml. Answer 14. 15. A vial of Phenytoin Sodium (Dilantin) contains 100 mg of drug in a total of 2 ml. How many mg of Phenytoin Sodium is contained in 0.5 ml of solution? Answer 16. The doctor orders 5 mg/kg of a drug I.M. The drug comes 1 g in 2 ml. How many ml would you give if the patient weighs 145 pounds? Answer 17. The patient is to receive 5,000 units of Heparin subcutaneously BID. How many mL per dose will be needed if the Heparin comes as 20,000 units/ml. Answer

Answer 1

1. Answer.

10000 units/ml= 1ml

1ml= 10000 units

0.1ml= 1000 ( 1/10 th part)

Dose= needed dose/ available dose× 10000(units)

= 0.8 ml/ 1ml × 10000

= 0.8× 10000= 8000 units .

So, 8000units /ml will be administered to the patient.

2.Answer.

2ml = 100 mg

1ml= 100/2= 50 mg,

Dose= needed dose/ available dose× 100

= 0.5ml/2ml×100,

= 25 mg

So, 0.5 ml of dilantin contains 25mg of drugs.

3.Answer.

Prescribed dose is 5mg/ kg

That means each 1 kg of body weight should get 5mg of drug.

Availability is ,

1 gram = 2ml

1gram = 1000 mg ( as it has to be administered in milligram)

Weight is 145 pounds.= 65.771 kgs

If 1kg = 5mg

Then, 65.771 kg ×5 mg= 328.855mg ,

Dose =needed dose/ available dose× dilution (ml)

= 328.855mg/1000 mg× 2ml

= 0.65771 ml drug is needed .

4. Answer

Patient needs 5000 units of heparin

Availability is 20000 units / ml

So, 1ml = 20000 units ,

Dose = needed dose/ available dose× dilution (ml)

= 5000/ 20000× 1(ml)

= 1/4 = 0.25 ml of heparin is needed .