A nurse is caring for a client with suspected congestive heart failure. Which blood test is specifically used to measure heart strain and assist in the diagnosis of CHF?

A) This choice is incorrect because limiting fluid intake to 1 liter per day is too restrictive and may lead to dehydration. Fluid restriction is essential for some clients with CHF, but the specific limit should be determined by the healthcare provider based on the client's individual needs.

B) This choice is incorrect because fluid restriction should not be limited to the evening only. Clients with CHF should monitor their fluid intake throughout the day to prevent fluid overload.

C) This choice is incorrect because drinking fluids primarily with meals may not be sufficient for managing fluid intake. Fluid intake should be balanced throughout the day to avoid excessive fluid retention.

D) This choice is correct. Monitoring daily weights is an essential strategy for clients with congestive heart failure to manage fluid balance. Sudden weight gain can indicate fluid retention, a common symptom of CHF. Clients should be instructed to report any significant weight changes to their healthcare provider promptly.

A) This choice is incorrect because a complete blood count (CBC) is a general blood test that measures different components of the blood, such as red blood cells, white blood cells, and platelets. It is not specifically used to measure heart strain or diagnose CHF.

B) This choice is incorrect because a basic metabolic panel (BMP) is a blood test that measures electrolytes, kidney function, and glucose levels. It is not specific to diagnosing CHF.

C) This choice is correct. A brain natriuretic peptide (BNP) level is a blood test specifically used to measure heart strain. Elevated BNP levels can indicate heart failure, making it a valuable diagnostic tool in assessing suspected CHF.

D) This choice is incorrect because a C-reactive protein (CRP) level is a marker of inflammation and is not specific to diagnosing CHF.