Correct Answer: B

Rationale: Polyuria is the correct answer. Diabetes insipidus is characterized by the inability to concentrate urine, leading to excessive urination (polyuria) and thirst. Bradycardia (slow heart rate) is not typically associated with diabetes insipidus. While dehydration from the excessive urination can lead to hypotension rather than hypertension, and weight loss can occur due to fluid loss, the most specific and significant finding expected in diabetes insipidus is polyuria.

Correct Answer: C

Rationale: After a total hip arthroplasty, it is crucial to prevent hip dislocation. Placing an abduction pillow between the client's legs helps maintain proper alignment and prevents the hip from dislocating. This position aids in keeping the hip in a neutral or slightly outwardly rotated position, reducing the risk of dislocation. Placing the client supine with a pillow between the legs (Choice A) or using a trochanter roll (Choice D) may not provide the same level of abduction and support needed to prevent hip dislocation. Placing a pillow under the client's knees (Choice B) does not provide the necessary support to maintain proper hip alignment in this situation.

Correct Answer: B

Rationale: A weight loss of 0.5 kg (1.1 lb) in 24 hours may indicate dehydration or malnutrition, which are critical concerns for a client receiving total parenteral nutrition (TPN). Therefore, the nurse should report this finding to the provider. Elevated blood glucose levels (Choice A) can be managed by adjusting TPN components, WBC count (Choice C) and a slightly elevated temperature (Choice D) are not directly related to TPN administration and may not require immediate intervention.

Correct Answer: B

Rationale: Keeping the client's legs elevated is the appropriate action to prevent venous thromboembolism following a total knee arthroplasty. Elevating the legs helps promote circulation and reduce the risk of blood clots. Placing a pillow under the client's knees may provide comfort but does not address the specific postoperative complication. Flexing the client's knee every 2 hours may be contraindicated as excessive movement can disrupt the surgical site. Applying heat to the operative knee is not recommended immediately postoperatively as it can increase swelling and discomfort.

Correct Answer: B

Rationale: Polyuria is the correct answer. Diabetes insipidus is characterized by the inability to concentrate urine, leading to excessive urination (polyuria) and thirst. Bradycardia (slow heart rate) is not typically associated with diabetes insipidus. While dehydration from the excessive urination can lead to hypotension rather than hypertension, and weight loss can occur due to fluid loss, the most specific and significant finding expected in diabetes insipidus is polyuria.