Question

agnose U lamphenicol b. Enrofloxacin c. Optimmune d. Acarexx 21. How many milligrams of tropicamide are in a 0.5% solution? a. 50 mg b. 500 mg c. 5 mg d. 0.5 mg 22. If the veterinarian prescribes amphotericin B in a 0.15% solution for ocular administration at a rate of 0.2 ml in the eye every 4 hours for 14 days, how much solution should be prepared for the patient? a. 8.4 mL b. 4.2 mL c. 16.8 mL d. 32.16 mL 23. If proparacaine anesthetizes the cornea for 8 minutes at the usual dose of two drops, how many drops will need to be administered if an ophthalmic procedure takes half an hour? a. 7.5 drops b. 5.5 drops c. 9.5 drops d. 12.5 drops 24. A veterinary ophthalmologist must perform fluorescein staining on 21 dogs in a 1-week! period. How many fluorescein strips need to be on hand to accomplish this task for a month? a. 64 strips b. 66 strips c. 94 strips d. 84 strips bral
could you please check the answers for 21. 22. 23 and 24. please. I would like to see if I got these right

Answer 1

Ans 21: 5 mg

The solution's mass by volume% cocentration, m/v %, tells the number of grams of solute present for every 100 ml of the solution .

Therefore 0.5 % solution = 0.5 / 100 = 0.005 g solute

convert it to mg = 0.005 * 1000 = 5 mg ( as 1gm = 1000 mg)

Ans 22 : 16.8 ml

Veterinarian prescribed 0.15 % solution.

0.15 % solution means= 0.15 g solute in 100 ml solution = 0.15 / 100 = 0.0015 = 1.5 g ( multiplied by 1000 to convert in mg )

This solution needs to be adminnistered every 4 hours in a day.

1 day has total 24 hours .Therefore patient is getting total 6 time dose in a day .( 24 / 4 = 6 )

Therefore for 14 days he will get total 84 doses.

Single dose contains volume of 0.2 ml .

Therefore for 84 doses it will be 16.8 ml. ( 84 * 0.2 = 16.8 )

Ans 23 : 7.5 drops

If 2drops are required to anesthetize cornea for 8 minutes

Then X drops are required for half hour ( i.e 30 min)

cross multiplication;

2 * 30 = 8 * X

X=2 * 30 / 8 = 60 / 8 = 7.5 drops

Ans 24 : 84 strips

If 21 dogs are stained by fluoresecin strips in a week .

Then 21 strips are required .( 1 for each )

There are 4 weeks in a month.

If 21 strips for 1 week .

Then for 4 weeks =21 *4 = 84 strips