A nurse is providing dietary teaching to a client who has a history of recurring calcium oxalate kidney stones. Which of the following instructions should the nurse include in the teaching?
 

Step 1: The total amount of digoxin required per dose is 125 mcg. We need to convert this to mg because the available tablets are in mg. We know that 1 mg = 1000 mcg, so 125 mcg = 125 ÷ 1000 mg = 0.125 mg.

Step 2: Each tablet contains 0.25 mg of digoxin.

Step 3: To find out how many tablets are needed, we divide the total amount required by the amount in each tablet. So, (0.125 mg ÷ 0.25 mg/tablet).

Step 4: The result is 0.5 tablets.

So, the nurse should administer 0.5 tablets per dose. This is already rounded to the nearest tenth.

Choice A reason: Metastasis refers to the process by which cancer cells spread from the primary tumor site to distant organs or tissues. This can occur through the bloodstream or lymphatic system, leading to the formation of secondary tumors in other parts of the body.

Choice B reason: This statement is incorrect because metastasis, by definition, involves the spread of cancer cells to multiple locations, not their confinement to a single area.

Choice C reason: The description provided in this choice is more indicative of metaplasia, which is a change in the type of cells, and not metastasis, which is the spread of cancer cells.

Choice D reason: This choice is incorrect as it does not describe metastasis. Cancer cells do not stop growing because they run out of space; they continue to proliferate and can invade other tissues.