Question

A client is prescribed tobramycin sulfate 0.128 grams IV every 8 hours. Tobramycin is available in a liquid concentration of 40 mg/ml. How many ml should the nurse administer?

a) 2.5
b) 3
c) 3.2
d) 4

Answer 1

The nurse should administer 3.2 mL of tobramycin sulfate, as the prescribed dose of 0.128 grams is equivalent to 128 mg, and dividing this by the concentration of 40 mg/mL results in a volume of 3.2 mL.

Step-by-step explanation:

The question asks how many milliliters (mL) of tobramycin sulfate should be administered if the prescribed dose is 0.128 grams and the available liquid concentration is 40 mg/mL. To find the answer, you need to convert the prescribed dose from grams to milligrams and then use the concentration to calculate the volume.

Solution:

Convert grams to milligrams: 0.128 grams × 1,000 mg/g = 128 mg.

Calculate the volume to be administered using the available concentration: Volume (mL) = Dose (mg) ÷ Concentration (mg/mL). Volume = 128 mg ÷ 40 mg/mL = 3.2 mL.

Therefore, 3.2 mL of the tobramycin solution should be administered.