Many of the body’s organs, including the liver and intestines, are inside the belly (abdomen). The organs are covered in a thin membrane called the peritoneum. The peritoneum has 2 layers. It makes a fluid that allows the layers to glide smoothly past each other. If this fluid builds up in the belly, the condition is called ascites. Ascites causes pain and discomfort. It can also make it hard to breathe. Fluid can build up for a number of reasons. These include chronic liver disease (cirrhosis), heart or kidney failure, and cancer. Your provider can tell you more about the cause of your ascites.

The goal of paracentesis may be to help diagnose the cause of the excess fluid. Or, the goal may be to drain excess fluid from the abdomen. In some cases, fluid returns and the procedure needs to be repeated.

• Tell your provider about any medicines you are taking. This includes all prescription medicines, over-the-counter medicines, street drugs, herbs, vitamins, and other supplements.

• Tell your provider about any allergies you have.

• Before the procedure begins, you’ll be asked to empty your bladder. This helps prevent injury to the bladder during the procedure. If needed, a thin tube (Foley catheter) may be placed into your bladder to drain urine during the procedure. This tube is removed after the procedure.

• An IV (intravenous) line may be put into a vein in your arm or hand. This line supplies fluids and medicines.

• You are awake during the procedure.

• An imaging method called ultrasound may be used to guide the procedure. It shows live images of the inside of your belly on a video screen. This helps the provider find the site of the excess fluid inside your belly and decide where to insert the needle.

• A numbing medicine (local anesthesia) is injected into your belly where the needle will be inserted.

• Once the skin is numb, the provider carefully inserts the needle into the belly. This causes the needle to fill with fluid.

• The needle may be removed with only a small sample of fluid. This sample is sent to a lab for testing. Getting a sample takes about 10 to 15 minutes.

• Or, a tube may be attached to the needle so that more of the excess fluid can be drained. The tube may be taped or stitched into place. This keeps it from pulling the needle out of your belly.

• How long it takes to drain all of the fluid varies for each person. In most cases, it takes about 30 minutes. Your provider will let you know if the procedure is expected to take longer than usual.

• Once all of the fluid is drained, the needle and tube are removed.

• Pressure is put on the puncture site to stop any fluid leakage or bleeding.

• A small bandage is placed over the puncture site. Albumin may be given during or after the procedure to prevent low blood pressure or kidney problems.

You may be taken to a recovery room to rest after the procedure. If you are in pain, you will be given medicine as needed. You will likely be sent home 1 to 2 hours after the procedure is done. When you leave the hospital, have an adult family member or friend drive you home. If you are staying in the hospital, you will return to your hospital room. If your fluid is infected, you will be sent home on antibiotics. In some cases, the paracentesis may need to be repeated if the fluid reaccumulates. Diuretics (medicines that increase urination) are often prescribed to decrease reaccumulation of the fluid in the future.

This procedure is considered safe. But like all procedures, it carries some risks. These include the following:

• Bleeding

• Infection

• Injury to structures in the belly

• Fast drop in blood pressure

• Kidney problems after the procedure

Call your healthcare provider if you notice any of the following after the procedure:

• A fever of 100.4°F (38.0°C) or higher

• Trouble breathing

• Pain that does not go away even after taking pain medicine

• Belly pain not caused by having the skin punctured

• Bleeding from the puncture site

• More than a small amount of fluid leakage from the puncture site

• Swollen belly

• Signs of infection at the puncture site. These include increased pain, redness, or swelling, as well as warmth or bad-smelling drainage.

• Blood in your urine

• Dizziness, lightheadedness, or fainting