AI Summary Paracentesis is a minimally invasive procedure that removes excess abdominal fluid (ascites) caused by advanced liver disease and portal hypertension, and it usually takes 20 to 60 minutes.
Medically reviewed.
Paracentesis is a minimally invasive procedure that removes excess fluid, called ascites, from the abdomen. Ascites can build up in people with advanced liver disease and portal hypertension (high blood pressure in the liver's blood vessels). Draining the fluid can relieve abdominal pressure, ease breathing, and allow the fluid to be tested. Treatment decisions should always be individualized and guided by a healthcare professional.
This page covers paracentesis in liver care: who may need it, how it works, what the procedure involves, benefits, risks, and aftercare. You can also connect with a liver specialist near you for personalized guidance on whether paracentesis fits your care plan.
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ABOUT PARACENTESIS
Paracentesis is a minimally invasive procedure that removes excess fluid from the abdomen. This fluid, called ascites, builds up because of advanced liver disease and portal hypertension. The procedure can relieve symptoms and improve comfort when the fluid buildup is significant.
Ascites is a symptom, not a disease. Advanced liver disease and cirrhosis are its most common causes, and nearly 80% of ascites cases occur in people with cirrhosis. Fluid can also be sent to a laboratory for testing, which helps your care team look for other problems.
Paracentesis treats the fluid, not the underlying liver disease. It is used alongside other care, such as a low-sodium diet and diuretic medicines, and it may be followed by monitoring and regular follow-up with your healthcare provider.
WHO PARACENTESIS MAY BE SUITABLE FOR
Your healthcare provider may recommend paracentesis if ascites is causing abdominal swelling or discomfort, or difficulty breathing. It may also be used when diuretic medicines are not controlling the fluid buildup, when you need relief from tense ascites, or when the fluid needs laboratory testing.
Paracentesis for testing has a special role. According to EASL guidance in Aimy Science Knowledge Research, a diagnostic paracentesis is mandatory for people with new-onset grade 2 or 3 ascites, and for those hospitalized for a cirrhosis-related complication. It helps rule out spontaneous bacterial peritonitis (SBP), an infection of the ascitic fluid that can cause no symptoms.
Because every patient's liver condition is different, there is no one-size-fits-all answer. Your healthcare provider decides whether paracentesis is appropriate after a full assessment of your liver disease and symptoms.
ELIGIBILITY OVERVIEW
Paracentesis may be considered for adults with the following conditions, needs, or treatment goals:
Before the procedure, your healthcare team examines your abdomen and may use ultrasound to find a safe pocket of fluid. They may also review:
HOW PARACENTESIS CAN HELP YOUR LIVER
Paracentesis removes excess fluid directly from the abdominal cavity. Taking out the fluid relieves abdominal pressure and discomfort, and it improves breathing and mobility.
The fluid can also be analyzed in a laboratory when needed. Testing can include cell count, protein, albumin, and cultures, which helps guide diagnosis and management.
Paracentesis also helps manage complications of portal hypertension. It does not treat the cause of the fluid buildup, so your care plan usually includes other measures to slow the fluid from returning.
LIVER BENEFITS
Ascites stretches the abdomen and can cause swelling, bloating, and discomfort. Paracentesis removes excess fluid directly from the abdominal cavity, which relieves that pressure. This is especially useful when the fluid is tense, meaning the abdomen is tightly swollen, or when diuretic medicines have not controlled the buildup.
A large amount of fluid can push upward on the diaphragm, the muscle that helps you breathe. Draining the fluid takes pressure off the diaphragm, so breathing often feels easier. With less fluid weighing on the abdomen, it can also be easier to move around during daily activities.
The fluid that is removed can be sent to a laboratory when your care team needs more information. Tests can include a cell count, protein, albumin, and cultures. These results help guide diagnosis and management, including checking the fluid for infection.
Ascites is one of the complications of portal hypertension, which is high blood pressure in the blood vessels of the liver. Removing the fluid treats this complication and reduces the symptoms it causes. It does not change the portal hypertension itself, so your care team will also plan other ways to manage it.
Paracentesis removes abdominal fluid to relieve pressure, ease breathing, and allow testing. It should only be performed and monitored under the guidance of a qualified healthcare team.
TREATMENT PROCESS
Your abdomen is examined and may be imaged with ultrasound to identify a safe pocket of fluid.
After your skin is cleaned and numbed with a local anesthetic, a needle or catheter is inserted into the abdominal cavity to remove the ascitic fluid.
Large-volume paracentesis is used when ascites is severe, recurrent, or not controlled by medicines. It typically removes more than 5 liters of fluid in one procedure, and larger volumes may be removed when clinically appropriate.
The procedure usually takes about 20 to 60 minutes, depending on how much fluid is removed and how fast it drains. Most patients go home the same day unless they need more monitoring.
Your blood pressure, kidney function, and symptoms may be monitored before and after the procedure, especially after large-volume fluid removal.
BENEFITS AND SAFETY
Paracentesis can give quick relief when ascites causes abdominal pressure, pain, or trouble breathing. It is minimally invasive and avoids major surgery, and it can help when medicines alone are not enough. The extent of benefit varies from person to person.
Paracentesis is not a stand-alone treatment. Fluid can return, so it works best as part of a broader care plan that includes a low-sodium diet, prescribed diuretics when they apply, and regular follow-up.
As with any procedure, paracentesis carries risks, including bleeding, infection, low blood pressure, and fluid leaking from the puncture site. Kidney problems are rare. Your care team will monitor you during and after the procedure.
BENEFITS
Paracentesis quickly reduces the abdominal pressure caused by ascites. This can ease the discomfort, pain, and bloating that come with a swollen abdomen.
Draining the fluid relieves pressure on the diaphragm. When ascites makes it hard to take a full breath, this can make breathing easier and more comfortable.
Large-volume paracentesis is effective for refractory ascites, which is fluid buildup that medicines alone do not control. It is also used when ascites is severe or keeps coming back, and it gives relief while your care team continues the rest of your treatment plan.
Paracentesis avoids major surgery. Your skin is numbed with a local anesthetic, and the fluid is drained through a needle or catheter. The procedure usually takes about 20 to 60 minutes, and most patients go home the same day unless they need more monitoring.
Your healthcare provider will discuss the potential benefits and risks before the procedure and monitor your blood pressure, kidney function, and symptoms, especially after large-volume fluid removal.
SUPPORTING YOUR RESULTS
After paracentesis, patients are generally advised to follow a low-sodium diet, take prescribed diuretics as directed, and track their weight and abdominal size. Sodium restriction is a foundational part of ascites care, according to AASLD guidance.
These habits can help slow the return of fluid. Keep your follow-up appointments so your care team can watch your symptoms and liver health over time.
Areas that may support treatment:
COMMON QUESTIONS
Paracentesis may be recommended if ascites causes abdominal swelling, discomfort, or trouble breathing. It may also be considered when diuretic medicines are not controlling the fluid, when the ascites is tense, or when the fluid needs laboratory testing. Guidelines call for diagnostic paracentesis in new-onset grade 2 or 3 ascites. Whether it suits you depends on your symptoms and liver condition, so talk with your healthcare provider about your situation.
Your care team first examines your abdomen and may use ultrasound to find a safe pocket of fluid. Your skin is then cleaned and numbed with a local anesthetic, and a needle or catheter is placed in the abdomen to drain the ascitic fluid. If a large amount is removed, you may receive albumin through a vein to help maintain circulation and kidney function. Your provider can explain the steps for your care.
Paracentesis usually takes about 20 to 60 minutes, depending on how much fluid is removed and how quickly it drains. Most patients go home the same day unless they need more monitoring. You may be observed for a short time afterward, and your blood pressure, kidney function, and symptoms may be checked. Ask your healthcare provider how long to plan for and what aftercare you will need.
Paracentesis is minimally invasive, but it carries risks, including bleeding, infection, low blood pressure, and fluid leaking from the puncture site. Kidney problems are rare. Your care team monitors your blood pressure, kidney function, and symptoms, especially after large-volume fluid removal. Discuss the potential benefits and risks with your healthcare provider before the procedure so you know what to expect for your own health.
No, paracentesis does not cure ascites. It removes fluid and relieves symptoms, but it does not treat the liver disease behind the buildup, so fluid can return. A low-sodium diet, prescribed diuretics, daily weight checks, and regular follow-up help manage ascites over time. Your healthcare provider can build a plan that fits your liver condition and tell you what to do if swelling comes back.
Testing the fluid helps your care team understand what is causing your symptoms and guides your care. The laboratory can check cell count, protein, albumin, and cultures. Diagnostic paracentesis is also used to rule out spontaneous bacterial peritonitis, an infection of the ascitic fluid that may cause no symptoms. Ask your healthcare provider whether fluid testing applies to you.
Medical disclaimer: LiverDirectory provides educational information and a directory of providers. It does not provide medical advice, diagnosis, or treatment. Always consult a licensed physician regarding any medical condition.
