Correct Answer: A

Rationale: To calculate the correct rate, use the formula: (4 mcg/kg/min * 80 kg) / 800 mcg in 250 mL = 6 mL/hr. This calculation is based on the dose ordered (4 mcg/kg/min) multiplied by the patient's weight in kg (80 kg), divided by the concentration of the drug available (800 mcg in 250 mL) to be infused over 1 hour. Therefore, the correct answer is 6 mL/hr. Choices B, C, and D are incorrect as they do not reflect the accurate calculation based on the provided information.

Correct Answer: C

Rationale: The correct position for a client immediately postoperative following a hip arthroplasty is the lateral position with an abduction pillow between the legs. This position helps prevent dislocation of the hip prosthesis and maintains proper alignment of the hip joint. Supine position with legs extended (Choice A) may put stress on the hip joint, Semi-Fowler's position with legs bent (Choice B) may not provide adequate support and alignment, and prone position with legs elevated (Choice D) is not recommended after hip arthroplasty as it can compromise the surgical site and increase the risk of complications.

Correct Answer: C

Rationale: The correct answer is C: Cyanosis of the lips and nail beds. Cyanosis is a late sign of hypoxia and indicates severe oxygen deprivation, requiring immediate intervention in clients with pneumonia. Reporting this finding promptly is crucial to prevent further complications. Choices A, B, and D are incorrect because increased appetite, productive cough with green sputum, and mild shortness of breath are common findings in clients with pneumonia and may not require immediate intervention unless they worsen or are accompanied by other concerning symptoms.

Correct Answer: D

Rationale: Corrected Rationale: The correct action for the nurse to take when administering insulin glargine is to give it at the same time each day. This consistent timing helps maintain stable blood glucose levels. Choice A is incorrect because insulin glargine should not be administered via IV push. Choice B is incorrect as rotating injection sites is typically done for short-acting insulins to prevent lipodystrophy, not for insulin glargine. Choice C is incorrect as insulin glargine should not be mixed with other insulins before administration.

Correct Answer: B

Rationale: The correct statement is B: 'Dehydration can increase the risk of preterm labor.' Dehydration can lead to increased uterine irritability, potentially causing preterm contractions and labor. Choice A is incorrect as dehydration is not treated with calcium supplements but rather with fluids. Choice C is incorrect as dehydration is not caused by decreased hemoglobin and hematocrit levels but rather by a lack of fluids. Choice D is incorrect as dehydration does not directly cause gastroesophageal reflux.