Correct Answer: C

Rationale: The correct answer is C: Applying oxygen therapy at a high flow rate. In clients with COPD, high levels of supplemental oxygen can suppress the hypoxic drive to breathe, leading to carbon dioxide retention and respiratory depression. Oxygen therapy must be administered cautiously to prevent worsening respiratory status. Administering narcotics for pain relief (Choice A) can be necessary but should be done judiciously. Encouraging fluid intake (Choice B) and assisting with deep breathing exercises (Choice D) are generally beneficial interventions for clients with COPD and should not require the same level of caution as high-flow oxygen therapy.

Correct Answer: C

Rationale: Elevated blood pressure is a significant risk factor for coronary artery disease because it increases the strain on the arteries, leading to potential damage and a higher risk of developing coronary artery disease. Elevated HDL cholesterol (Choice A) is actually considered beneficial as it helps reduce the risk of heart disease. Low LDL cholesterol (Choice B) is also beneficial as high levels of LDL are associated with an increased risk of coronary artery disease. Low triglyceride levels (Choice D) are not typically considered a major risk factor for coronary artery disease.

Correct Answer: B

Rationale: The correct answer is B: Monitor the client's blood glucose levels. Clients with diabetes are at risk for perioperative complications related to blood glucose fluctuations. Monitoring blood glucose levels is crucial to maintaining proper management before, during, and after surgery. Option A is not the priority action as ensuring NPO status is a standard preoperative procedure for all clients. Option C could be important but is secondary to monitoring blood glucose levels. Option D is important but not the priority during the preoperative phase.

Correct Answer: D

Rationale: The correct intervention for the client receiving IV heparin who reports tarry stools and abdominal pain is to monitor the stool for the presence of blood. This is crucial to assess for gastrointestinal bleeding, a potential complication of heparin therapy. Assessing the characteristics of the client's pain may be helpful but is not the priority when signs of GI bleeding are present. Administering warfarin is not appropriate without a thorough assessment and confirmation of the cause of symptoms. While obtaining recent partial thromboplastin time results is important in monitoring heparin therapy, in this scenario, the immediate concern is to assess for possible GI bleeding.

Correct Answer: C

Rationale: A blood pressure of 88/52 mmHg indicates hypotension, which is a sign of worsening septic shock. Hypotension can lead to organ failure and requires immediate intervention. Elevated heart rate (choice A), mild fever (choice B), and slightly increased respiratory rate (choice D) are common in septic shock and may not necessarily indicate a deteriorating condition as much as hypotension does.