Correct Answer: B

Rationale: The Schilling test is used to determine the cause of vitamin B12 deficiency, a potential precursor to pernicious anemia. This test involves the use of a small oral dose of radioactive B12 and a large nonradioactive intramuscular dose. A 24-hour urine specimen is then collected to measure the amount of radioactivity in the urine, and thus radioactive B12. This test is not helpful in diagnosing aplastic, megaloblastic, or iron-deficiency anemia.

Correct Answer: A

Rationale: Chronic lymphocytic leukemia can cause anemia due to bone marrow suppression, leading to fatigue.

Correct Answer: C

Rationale: A comminuted fracture is a complete fracture across the shaft of a bone, with splintering of the bone into fragments. A simple fracture is a fracture of the bone across its entire shaft with some possible displacement but without breaking the skin. A greenstick fracture is an incomplete fracture, which occurs through part of the cross section of a bone. One side of the bone is fractured, and the other side is bent. A compound fracture, also called an open fracture, is one in which the skin or mucous membrane has been broken, and the wound extends to the depth of the fractured bone.

Correct Answer: C

Rationale: Crutches should be placed 6–10 inches to the side and front for stability. Weight is borne on hands, elbows are flexed, and the unaffected leg steps first.

Correct Answer: C

Rationale: Isosorbide dinitrate can cause orthostatic hypotension, so changing positions slowly prevents dizziness, indicating client understanding of adverse effects.