Albumin, Fluid

Albumin, Fluid

What it is

The Albumin, Fluid test measures the concentration of albumin, a protein made in the liver, in body cavity fluids such as pleural (lung), peritoneal (abdominal), or pericardial (heart) fluid. Albumin helps regulate osmotic pressure and fluid balance, and its measurement in body fluids assists in differentiating between various medical conditions.

Uses

This test is commonly used to differentiate between transudates and exudates, which helps determine whether fluid accumulation is due to systemic conditions such as liver cirrhosis, heart failure, or local diseases like infections, inflammation, or cancer.

It also aids in diagnosing ascites, pleural effusions, and pericardial effusions and helps guide further investigation and treatment planning.

Symptoms That May Lead to the Test

The test may be ordered if a patient presents with unexplained fluid accumulation, abdominal swelling, shortness of breath, chest pain, or signs of infection or liver disease.

Abnormal Results

High Albumin in Fluid: Rare but may indicate a protein-rich fluid due to inflammation or infection.

Low Albumin in Fluid: Often suggests transudative effusion due to systemic issues like cirrhosis, nephrotic syndrome, or congestive heart failure.

The albumin levels are often compared to serum albumin values to calculate the Serum-Ascites Albumin Gradient (SAAG), which helps differentiate causes of ascites.

Risks

The risks are mainly related to the fluid collection procedure (such as thoracentesis, paracentesis, or pericardiocentesis). Possible complications include mild pain, bruising, bleeding, or very rarely infection and organ injury. The laboratory measurement itself carries no risk.