Correct Answer: B

Rationale: Providing the immobile patient with a special mattress is an effective way to prevent pressure ulcers. Special mattresses help distribute pressure evenly and reduce the risk of developing pressure ulcers by relieving pressure on sensitive areas. Turning the patient every 4 hours (Choice A) is a standard practice to prevent pressure ulcers but may not be as effective as using a special mattress. Elevating the patient's legs (Choice C) can help with circulation but may not directly prevent pressure ulcers. Limiting the patient's movement (Choice D) can lead to other complications and is not a recommended method for preventing pressure ulcers.

Correct Answer: B

Rationale: The correct answer is B. Nurses have a legal and ethical obligation to honor a client's do-not-resuscitate (DNR) order, regardless of any request for resuscitation during a family visit. It is crucial for the nurse to explain to the client that the DNR order must be respected. Choice A is incorrect because starting resuscitation against the client's documented wishes goes against the principle of autonomy. Choice C is inappropriate as it disregards the client's autonomy and legal directives. Choice D is not the best option as the nurse should prioritize honoring the client's decision as per the DNR order.

Correct Answer: A

Rationale: Correct answer: When a patient with a left arm fracture reports severe pain unrelieved by medication, the nurse should assess for compartment syndrome. Compartment syndrome is a condition where increased pressure within a muscle compartment compromises circulation and can lead to tissue damage. It is a surgical emergency that requires immediate intervention. Choice B is incorrect because simply increasing pain medication without identifying the cause of the unrelieved pain may mask symptoms of a serious issue like compartment syndrome. Choice C is incorrect as surgery would only be necessary if compartment syndrome is confirmed. Choice D is incorrect as administering a sedative does not address the underlying issue of unrelieved pain and may delay appropriate treatment.

Correct Answer: A

Rationale: The correct answer is A: White blood cell count (WBC). Monitoring the white blood cell count is crucial when caring for a patient with an infection as it helps assess the body's response to the infection. An elevated white blood cell count often indicates an active infection or inflammation, while a decreasing count may signal improvement or potential complications. C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) are nonspecific markers of inflammation and not as specific to monitoring infection progression as the white blood cell count. Hemoglobin and hematocrit levels are important for assessing oxygen-carrying capacity and blood volume, but they are not the primary indicators for monitoring infection.

Correct Answer: B

Rationale: Checking the patient's weight daily is the most reliable indicator of fluid status because weight changes can directly reflect fluid retention or loss. Monitoring vital signs (Choice A) can provide some information but is not as specific as weight changes. Measuring intake and output (Choice C) is crucial but may not always accurately reflect fluid balance. Monitoring urine color (Choice D) can give some insights into hydration levels, but it is not as reliable as daily weight checks for assessing overall fluid status.