Which finding best reflects changes in a CVP reading indicating fluid volume status?

Which finding best reflects changes in a CVP reading indicating fluid volume status?

• A. Skin turgor
• B. Heart sounds
• C. Nail bed color
• D. Temperature

Answer: (B)

Central venous pressure reflects the amount of blood returning to the heart and the preload on the right side of the heart. When preload increases because of higher intravascular volume, the ventricles fill more, and this change often shows up as a louder or additional heart sound, such as an S3 gallop, which signals elevated filling pressures. That direct link between preload/venous return and how the heart fills makes heart sounds the best reflection of changes in a CVP reading. Peripheral signs like skin turgor, nail bed color, or temperature can hint at hydration or perfusion but don’t track central venous pressure as directly or reliably.