Hepatology• Updated 21 October 2026
Ascitic Fluid Tap (Paracentesis)
A procedure to remove and test fluid from the tummy, used in cirrhosis and other conditions.
Results: Same day to a few days Specimen: Ascitic fluid
Quick Summary
Primary Purpose
To find the cause of tummy fluid, check for infection and relieve swelling.
What It Measures
Protein, cells, culture and sometimes cancer cells.
Preparation
Empty your bladder first.
Overview
Infection of ascitic fluid is a serious complication of cirrhosis.
Large-volume taps relieve breathlessness and discomfort.
What It Measures
Cells
Infection.
Albumin gradient
Cause of fluid.
How It's Performed
- 01
Numb
Local anaesthetic on the tummy.
- 02
Needle
Fluid drained, sometimes guided by ultrasound.
- 03
Monitor
Blood pressure checked.
Interpreting Results & Next Steps
Discuss with Doctor
Your doctor will explain what your result means and what happens next.
If values are High:
Infection needs antibiotics; results guide further care.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Peritoneal fluid analysis(opens in a new tab) · MedlinePlus, US National Library of Medicine