A nurse is discussing with a patient who has reported acute lower back pain after lifting heavy boxes. What information should the nurse emphasize?

Choice A rationale
Massaging the site after injection is not recommended. It can cause the insulin to be absorbed more quickly than intended, which could lead to hypoglycemia.
Choice B rationale
Using cold insulin for injection to minimize site pain is not accurate. Insulin should be at room temperature when injected. Cold insulin can make the injection more painful.
Choice C rationale
Rotating the injection site is important to prevent lipodystrophy, a condition that causes abnormal fat deposits at the injection site. It also helps to keep insulin levels consistent.
Choice D rationale
Insulin is not absorbed most rapidly when injected in the thigh. The abdomen is actually the site where insulin is absorbed most quickly.

Choice A rationale

Full-thickness tissue loss extending to underlying support structures such as muscle, tendon, or bone is characteristic of a stage 4 pressure ulcer, not a stage 312.
Choice B rationale
A stage 3 pressure ulcer involves full-thickness skin loss and may appear as a deep crater. There may be damage to or necrosis of subcutaneous tissue that may extend down to, but not through, underlying fascia. This description matches the statement in Choice B, making it the correct answer.
Choice C rationale
A shallow, ruptured or intact skin blister without slough is more indicative of a stage 2 pressure ulcer. In a stage 2 pressure ulcer, there is partial-thickness loss of dermis presenting as a shallow open ulcer with a red-pink wound bed.
Choice D rationale
Unbroken skin with un-blancheable erythema is characteristic of a stage 1 pressure ulcer, not a stage 3. In a stage 1 pressure ulcer, the skin is not broken, but it has redness that does not lighten (or blanch) when you press on it.