The nurse is evaluating a client's central venous pressure (CVP) also called right atrial pressure (RAP) readings that are trending upwards. Which nursing problem is supported by the pathophysiologic mechanism most likely causing the increases?

A. Decreased cardiac output. Central venous pressure (CVP), also called right atrial pressure (RAP), reflects right ventricular preload and overall fluid status. An increasing CVP indicates fluid overload or impaired right ventricular function, both of which can lead to decreased cardiac output. Conditions such as right heart failure, pulmonary hypertension, or excessive fluid resuscitation can cause elevated CVP, reducing the heart’s ability to pump effectively and leading to poor systemic circulation. B. Ineffective airway clearance. Airway clearance is not directly related to CVP measurements. While severe pulmonary conditions like ARDS or COPD can contribute to cardiac strain and right heart failure, the primary mechanism for rising CVP is cardiac dysfunction or fluid overload, not airway obstruction. C. Ineffective peripheral tissue perfusion. Although decreased cardiac output can impair tissue perfusion, this choice is too broad. Increased CVP specifically reflects right-sided heart function and preload, making decreased cardiac output the more precise diagnosis related to the pathophysiologic mechanism. D. Deficient fluid volume. A low CVP is associated with hypovolemia and fluid deficits, while an increasing CVP suggests fluid overload, heart failure, or venous congestion. Deficient fluid volume would cause a downward trend in CVP, not an increase.