Correct Answer: A

Rationale: Administering oxygen is the most appropriate initial response to a patient experiencing confusion after surgery. Confusion can be a sign of hypoxia, which is inadequate oxygen supply to the brain. Administering oxygen helps ensure that the patient is getting enough oxygen, addressing a potential cause of the confusion. Repositioning the patient, encouraging deep breathing exercises, or performing a neurological exam may be necessary depending on the situation, but addressing potential hypoxia should be the priority in a confused post-operative patient.

Correct Answer: C

Rationale: The correct answer is C. A serum potassium level of 3.0 mEq/L is below the normal range and indicates hypokalemia, which should be reported to the provider. Hypokalemia can lead to serious complications such as cardiac arrhythmias. Choices A, B, and D are within normal ranges and do not require immediate reporting. A blood glucose level of 150 mg/dL is slightly elevated but not critically high. A serum sodium level of 138 mEq/L is within the normal range. A serum albumin level of 3.8 g/dL is also within the normal range.

Correct Answer: D

Rationale: The correct method to teach a patient about self-administration of insulin is to use a 90-degree angle for injection. This angle ensures proper subcutaneous administration of insulin, which is essential for effective absorption. Injecting into the upper arm (Choice A) is not recommended for insulin administration. While rotating injection sites (Choice B) is important to prevent lipodystrophy, the angle of injection is crucial for proper insulin delivery. Using a 45-degree angle (Choice C) is more suitable for intramuscular injections, not for subcutaneous insulin injections.

Correct Answer: A

Rationale: In a client with pericarditis, the priority finding is a paradoxical pulse. This is a crucial sign of cardiac tamponade, a life-threatening complication of pericarditis where fluid accumulates in the pericardial sac, causing compression of the heart. A paradoxical pulse is an exaggerated decrease in systolic blood pressure (>10 mmHg) during inspiration. Prompt recognition and intervention are essential to prevent hemodynamic instability and cardiac arrest. Dependent edema (choice B) is not typically associated with pericarditis. Pericardial friction rub (choice C) is a common finding in pericarditis but does not indicate the urgency of intervention as a paradoxical pulse. Substernal chest pain (choice D) is a classic symptom of pericarditis but is not as critical as a paradoxical pulse in the context of assessing for complications.

Correct Answer: B

Rationale: Administering oxygen is crucial in managing a patient with respiratory distress as it helps improve oxygenation and alleviate breathing difficulties. While administering bronchodilators may be beneficial in certain respiratory conditions like asthma or COPD, in a patient with respiratory distress, ensuring adequate oxygen supply takes precedence. Checking oxygen saturation is important, but the immediate intervention to address respiratory distress is providing supplemental oxygen. Repositioning the patient may be helpful in optimizing ventilation but is not the primary intervention in managing acute respiratory distress.