Question

If a MDP kit contains 230 mCi of Tc99m in 9 ml at 0700 how much will have to withdrawn for a 20 mCi dose at 1300?

a. 0.6 ml
b. 0.8 ml
c. 1.6 ml
d. 1.9 ml
e. 2.1 ml

Answer 1

Approximately 0.8 ml of the Tc99m solution needs to be withdrawn for a 20 mCi dose at 1300.

Step-by-step explanation:

To find out how much of the Tc99m solution needs to be withdrawn for a 20 mCi dose, we can use a proportion method. Let's set up the proportion:

The initial amount of Tc99m: 230 mCi

The initial volume of Tc99m: 9 ml

The desired dose: 20 mCi

The unknown volume to be withdrawn: x

Using the proportion:

(Initial amount of Tc99m) / (Initial volume of Tc99m) = (Desired dose) / (Unknown volume to be withdrawn)

Substituting the given values:

(230 mCi) / (9 ml) = (20 mCi) / (x)

Simplifying the equation:

230 mCi * x = 9 ml * 20 mCi

x = (9 ml * 20 mCi) / 230 mCi

x = 0.7826 ml (rounded to 0.8 ml)

Therefore, approximately 0.8 ml of the Tc99m solution needs to be withdrawn for a 20 mCi dose at 1300.