Which statement best describes CVP's clinical relevance?

Which statement best describes CVP's clinical relevance?

• A. CVP measures blood glucose
• B. CVP primarily reflects fluid volume status
• C. CVP measures cognitive function
• D. CVP monitors airway pressure

Answer: (B)

Central venous pressure reflects the pressure in the right atrium, which is closely tied to preload and intravascular fluid status. The idea is that this pressure gives a sense of how much blood is returning to the heart and how much volume is available to pump. In practice, CVP helps clinicians assess fluid balance and guide fluid therapy in critically ill patients. A higher CVP often points to higher intravascular volume or impaired right-heart function, while a lower CVP suggests hypovolemia. It’s not a measure of blood glucose, cognitive function, or airway pressure. Readings can also be influenced by factors like positive-pressure ventilation and overall cardiovascular status, so CVP is interpreted within the broader clinical context and in conjunction with dynamic indicators of fluid responsiveness.