Question

1- a patient is receiving vancomycin 1.25 g every 8 hours in D5w. How many kilocalories will the patient receive in 24 hours?

2- if 60 g of 1% hydrocortisone is mixed with 80 g of 2.5% hydrocortisone, what is the percent W/W of hydrocortisone in the final mixture?

3 - if 3 teaspoonsful of dexamethasone intensol (1mg/ml) is diluted to 120ml with sterile water. What is the strength of the final solution in mg/ml? Express this result in percent in w/v

4- How many mg of sodium are present in 500 ml of 0.45% sodium chloride.

5- How many ml of sodium chloride 4meq/ml are needed to make 1l D10/0.45% sodium chloride using 1L bag of dextrose 10%

6- Bupivacaine 0.125% in 400 ml 0.9% sodium chloride premix bag are out of stock. How would you prepare a bag using bupivacaine 0.25%

7- How many g of g of sodium chloride should be used to prepare 1.5 l of normal saline? How many ml of a 23.4%of sodium chloride will be used to make this solution? What base solution will be used?

8- How many ml of 3% hydrogen peroxide solution are needed to make 240 ml of a 1% hydrogen peroxide solution

9- How many g of the drug are required to dispense one pint of 1 in 25 solutions

10 - How would 500 ml bag of 3% 50/50 be prepared using 3%sodium chloride, sodium acetate 2 meq/ml, and sterile water for injection.

Answer 1

Q. No. 1. Answer :

* patient receiving 1.25 GM of vancomycin every 8 th hourly in dextrose 5 water.

* means per 24 hours 3 times it will come.

* 1 ml of d5 solution provides 0.17 k. Cal of energy.

* so for 3 doses means if fluid is 500 ml means total 1500 ml.

* so 1500 × 0.17 = 255 k.cal of energy received by patient in 24 hours.

Q. No. 3. Answer :

* three tea spoon means : 15 ml.

* 1 mg per 1 ml means : 15 mg per 15 ml.

* 15 mg diluted in 120 ml means = 120/15 = 8 ml

* so 1 mg = 8 ml.

* w/ v is 0.0125 gm per 100 ml .

Q. No. 4. Answer :

In 0.45% sodium chloride is half normal saline. In these each ml of 0.45 % normal saline contains 4.5 mg of sodium chloride.

So 500 ml of 0.45% normal saline having 2250 mg of sodium chloride.

4.5 × 500 = 2250 .

Q. No. 8. Answer :

To make a 1% of hydrogen peroxide solution in 240 ml,

Approximately 2.46 ml of 3% h2o2 should be add 240 ml of water to prepare 1 % of hydrogen peroxide.

Because 3% of hydrogen peroxide is having 3 %. And 97 % of water.

So 3 ml in 97 ml of water for 100 ml. Then for 240 ml approximately 7. 4ml to be add.

To prepare 1 % we need to add 2.46 ml for 240 ml of water.