The nurse is caring for a client receiving total parenteral nutrition (TPN). The nurse understands that the best explanation for utilizing TPN is to:

A. Sit the client up and provide supplemental oxygen is the correct priority intervention. Chest pain and shortness of breath can be indicative of pulmonary embolism or other respiratory complications, which require immediate attention. Sitting the client up helps improve respiratory mechanics, and providing supplemental oxygen can support oxygenation while further assessments are conducted.
B. While contacting the physician and obtaining an arterial blood gas may be necessary to assess respiratory status and oxygenation, it is not the immediate priority. The client's symptoms require immediate intervention to ensure adequate oxygenation and prevent further deterioration.
C. Chest pain and shortness of breath are not typically expected findings after bariatric surgery and could indicate serious complications. It is essential not to dismiss the client's symptoms but to take them seriously and initiate appropriate interventions.
D. While the use of an incentive spirometer is important for preventing respiratory complications after surgery, it is not the priority intervention in this situation. The client's current symptoms require immediate attention to address potential respiratory distress or other serious complications.

A. While it may have some impact on kidney function indirectly through its effects on blood pressure and heart function, urine output is not the primary parameter used to assess the effectiveness of carvedilol in a patient with a history of unstable angina.
B. Carvedilol, as a beta-blocker, helps reduce heart rate by blocking the effects of adrenaline on the heart. In unstable angina, lowering the heart rate can reduce myocardial oxygen demand, which is beneficial in managing ischemic symptoms
C. Carvedilol primarily affects heart rate and blood pressure but doesn't directly regulate heart rhythm. However, in patients with certain cardiac conditions, like heart failure or left ventricular dysfunction after a heart attack, carvedilol can sometimes help to stabilize heart rhythm indirectly by reducing stress on the heart.
D. Carvedilol is also effective in reducing blood pressure, which is beneficial in patients with unstable angina, as it decreases the workload on the heart and the oxygen demand of the myocardium. A blood pressure reading of 120/90 is within the normal range for an adult and indicates good control of blood pressure.