Correct Answer: C

Rationale: The correct answer is C: Increasing salt intake. Salt intake can worsen hypertension by causing water retention and increasing blood pressure. Limiting caffeine intake (A) and increasing physical activity (D) are beneficial for managing hypertension. Consuming more fruits and vegetables (B) is also recommended as they are part of a healthy diet that can help lower blood pressure. Overall, educating the patient to avoid increasing salt intake is crucial in managing hypertension effectively.

Correct Answer: B

Rationale: The correct answer is B: Respiratory failure. Patients with COPD are at risk for respiratory failure due to impaired gas exchange and respiratory muscle weakness. This can lead to hypoxia and hypercapnia. Monitoring for signs such as increased work of breathing, decreased oxygen saturation, and altered mental status is crucial. Hypoglycemia (A) is not a common complication of COPD. Hyperkalemia (C) is less likely to occur in COPD unless the patient is on medications that can cause elevated potassium levels. Anemia (D) may be present in COPD due to chronic inflammation, but it is not a direct complication that requires monitoring for signs of respiratory failure.

Correct Answer: B

Rationale: The correct answer is B: The diaphragm of the stethoscope. The diaphragm is used to assess heart murmurs as it allows for higher-frequency sounds to be heard more clearly. When assessing heart murmurs, using the diaphragm helps to differentiate between systolic and diastolic murmurs, as well as to identify specific characteristics such as intensity and location. A: The bell of the stethoscope is used for low-frequency sounds and would not be ideal for assessing heart murmurs. C: Palpation with the palm of the hand is used to assess pulses and vibrations, not heart murmurs. D: Asking another nurse to double-check the finding is important for validation but does not directly relate to the technique used to assess a heart murmur.

Correct Answer: A

Rationale: The correct answer is A: Serum creatinine levels. In patients with chronic kidney disease, monitoring serum creatinine levels is crucial because it reflects kidney function. An increase in creatinine levels indicates worsening kidney function. Hemoglobin levels (B) are important in assessing anemia, common in CKD, but not the priority. White blood cell count (C) and platelet count (D) may indicate infection or bleeding, respectively, but are not specific to kidney function in this context.

Correct Answer: C

Rationale: The correct answer is C, monitoring vital signs and fluid status, because it is crucial for assessing the patient's immediate post-operative condition and detecting any signs of complications like hemorrhage or shock. This step ensures early intervention if any issues arise, promoting patient safety and recovery. Administering pain medication (A) is important but not the top priority. Encouraging early ambulation (B) and providing wound care (D) are also essential but come after ensuring the patient's vital signs and fluid status are stable.