13. What is the appropriate syringe that would be used to administer 67 units of

Question

13. What is the appropriate syringe that would be used to administer 67 units of insulin subcut? 14. Which of the following could not be solution strength? (circle it) 0.04% 15. Calculate the number of grams of dextrose in 500 mL of a 5% solution. 16, How many mL of a normal saline (0.9% NaCl) solution 18 grams of NaCl? 17. Are the following two strengths equivalent: 2% and 20mg/mL? 18. Thorazine is available in a strength of 25mg/mL. Express this strength as 96. 19. How many mL of 2% lidocaine viscous will contain 10mg of lidocaine? 20, How many mg of fluconazole are contained in 200mL of a 0.2% solution? 2:7 6mL 4g/mL half strength

Explanation / Answer

14. 6ml (doesn't explain the quantity of solute but only of solvent which is 6ml. Should be expressed in %, ratio, g/ml or half strength (0.250%))

15. A 5% solution means 5g of solute (dextrose) in 100ml of solution.

100ml solution has 5g dextrose

1ml solution has (5/100) = 0.05g dextrose

500ml solution has 500 * 0.05g = 25g dextrose

16. 0.9% Nacl has 0.9g of Nacl in 100ml water

1g of Nacl will be used in (100/0.9) ml water

18g of Nacl will be used in (100*18/0.9) = 2000 ml water or 2 litre water

17. 2% strength = 2g in 100 ml solution

while 20mg/ml = 20/1000 g/ml solution = 2g in 100 ml solution

hence, both the stengths are equivalent

18. Thorazine's strength = 25 mg/ml = (25 /1000) g/ml = 2.5 g per 100 ml = 2.5% strength

19. 2% will have 2g of lidocaine in 100 ml solution = 2000mg of lidocaine in 100 ml solution

= 20 mg in 1 ml solution = 10 mg in 0.5 ml solution (simple division on both the sides)

20. 0.2% solution will have 0.2 g of fluconazole in 100 ml solution

therefore, 200ml solution will have twice = 0.4 g = 400 mg of fluconazole

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