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 preload or filling pressure of the heart. When fluid status changes, the heart’s filling pressures change as well, and this often shows up as changes in how the heart sounds sound on auscultation. An S3 gallop, in particular, signals elevated ventricular filling pressures from increased preload, which aligns with a higher CVP reading and indicates fluid overload or impaired cardiac compliance. That direct link between preload and heart sounds makes them the best reflection of CVP changes. Skin turgor measures extracellular dehydration or overhydration, but it doesn’t tell you about central venous pressure. Nail bed color and temperature reflect peripheral perfusion, not the central venous pressure.

Central venous pressure reflects the preload or filling pressure of the heart. When fluid status changes, the heart’s filling pressures change as well, and this often shows up as changes in how the heart sounds sound on auscultation. An S3 gallop, in particular, signals elevated ventricular filling pressures from increased preload, which aligns with a higher CVP reading and indicates fluid overload or impaired cardiac compliance. That direct link between preload and heart sounds makes them the best reflection of CVP changes.

Skin turgor measures extracellular dehydration or overhydration, but it doesn’t tell you about central venous pressure. Nail bed color and temperature reflect peripheral perfusion, not the central venous pressure.