What is paracentesis and how does it help pancreatic cancer patients?

Paracentesis is a procedure where a doctor removes extra fluid, called ascites, from the belly. For people with pancreatic cancer, this fluid can cause severe bloating, pain, and even trouble breathing. The procedure is quick—about 45 minutes—and helps ease these symptoms, giving patients a chance to feel more comfortable and improve their quality of life.

What happens during a paracentesis procedure?

The process is simple but effective. You lie on a bed, and the doctor numbs a spot on your belly with a local anesthetic. They then insert a thin needle or tube to drain the fluid into a container. Once done, the area is bandaged, and most people feel relief almost immediately. It’s a safe, outpatient procedure that doesn’t take long.

What are the benefits and limitations of paracentesis for people with pancreatic cancer?

Paracentesis can relieve pain, bloating, and the tightness that comes with fluid buildup. It can also make breathing easier and help you move around more freely. But it’s not a permanent fix. The fluid often comes back, meaning some patients might need repeated procedures or even a catheter for ongoing drainage, which can carry a risk of infection.

How does protein loss during paracentesis affect pancreatic cancer patients?

When the fluid is drained, proteins like albumin are lost too. This can make malnutrition worse, which is already a common struggle in advanced pancreatic cancer. Losing too much protein can also make fluid come back faster, creating a frustrating cycle for patients.

How is protein loss managed during paracentesis for pancreatic cancer patients?

Doctors often recommend replacing the protein lost during the procedure, especially if a lot of fluid is removed. They might use albumin therapy or suggest adding more protein-rich foods or supplements to your diet. Regular monitoring of your nutrition helps ensure you’re getting what your body needs to stay strong.

What are the risks and complications of paracentesis for people with pancreatic cancer?

While paracentesis is usually safe, there are some risks. These include infections (especially with a catheter), bleeding, or, very rarely, injury to nearby organs. Removing a lot of fluid can sometimes lower blood pressure. That’s why it’s important for your healthcare team to closely watch for any issues during and after the procedure.

Are there alternatives to paracentesis for managing ascites in pancreatic cancer?

Yes, there are other ways to manage ascites. Some people benefit from diuretics, medications that help your body get rid of extra fluid. Chemotherapy or newer targeted therapies, like bevacizumab, may also help reduce fluid buildup. Your doctor will recommend the best option based on your situation.

How often do pancreatic cancer patients need to undergo paracentesis?

How often you’ll need paracentesis depends on how quickly the fluid comes back. Some people need it every few weeks, while others might use a catheter for ongoing drainage. Your healthcare team will work with you to decide what’s best.

Can paracentesis improve quality of life for people with pancreatic cancer?

Absolutely. By relieving symptoms like belly pain, bloating, and difficulty breathing, paracentesis can make a huge difference. It gives people the chance to feel more comfortable, move around more easily, and focus on the things that matter most.

How does paracentesis fit into the overall treatment plan for pancreatic cancer?

Paracentesis doesn’t treat cancer, but it plays a big role in managing symptoms. It helps patients feel better, which can make it easier to continue treatments like chemotherapy. By improving comfort and quality of life, it allows patients to stay stronger and more focused on their overall care.

Paracentesis: draining abdominal fluid

Paracentesis drains fluid from the abdomen to relieve pressure and sometimes to test the fluid. This guide explains how to prepare, what happens during drainage, aftercare, the albumin question, and what to arrange if fluid returns.

INFORMATION & SUPPORT

Paracentesis is a procedure that drains fluid from the abdomen. For people whose pancreatic cancer has caused ascites — a buildup of abdominal fluid — drainage can relieve the pressure, tightness, and breathlessness the fluid causes, and the fluid itself can be tested.

This guide covers the procedure: how to prepare, what happens, aftercare, and the questions worth asking. For why fluid builds up and the wider management choices, read the companion guide: Ascites: abdominal fluid buildup in pancreatic cancer.

Part of our Complications of pancreatic cancer guides.

Why might paracentesis be offered?

There are two purposes, and your procedure may serve one or both:

Relieving symptoms — removing fluid can ease pressure, discomfort, and breathlessness.
Testing the fluid — a sample may be sent to the laboratory to help investigate the cause and check for infection or cancer cells.

Before the appointment

Preparation instructions come from the service performing your procedure — this guide does not replace them, and it does not tell everyone to stop blood thinners or fast. Ask in advance:

Do I need any tests beforehand?
What should I do about my medicines?
Are there eating or drinking instructions?
Should someone accompany me?
How long should I allow for the visit?
Who will explain any fluid-test results, and when?

The drainage and total appointment time vary. Ask how long to allow for preparation, drainage, and monitoring — if a large amount of fluid is removed, monitoring can extend the visit.

What happens during drainage?

You are awake for the procedure, usually lying on your back with your head slightly raised. The Canadian Cancer Society describes the sequence:

Positioning and assessment — the team confirms the best site, sometimes using ultrasound.
Cleaning and local anaesthetic — the skin is cleaned and the area numbed.
Needle and catheter placement — a thin needle and then a flexible catheter are placed into the abdomen, sometimes with ultrasound guidance.
Drainage and monitoring — fluid drains through the catheter while the team monitors you.
Finishing — the temporary catheter is removed and a dressing applied, or, for a longer-term catheter, you receive separate instructions (below).

Will I need albumin?

Albumin is sometimes given around drainage, depending on the cause of the ascites and the person's condition. The Canadian Cancer Society notes it may be given intravenously after paracentesis to help prevent low blood pressure. It is not automatically required for everyone with cancer-related ascites — rules developed for cirrhosis-related ascites do not transfer directly.

Ask your team whether it is appropriate for you and what monitoring is planned. This guide publishes no universal volume threshold or infusion dose.

After drainage

You will have a dressing over the site; follow the team's instructions for keeping it dry and when it can come off.
Some discomfort at the site is common, and a small amount of fluid leakage can happen.
Follow the team's instructions about activity afterwards — they depend on how much fluid was removed and how you feel.
Ask how and when you will receive any fluid-test results, and what follow-up is planned.
Know whom to contact about concerns — including after hours — before you leave.

Possible risks

Most people have no serious problem. Pain, bleeding, or leakage at the insertion site can occur. Less common complications include infection, low blood pressure, and injury to nearby structures. Your treating service's discharge instructions govern what to watch for — contact your team promptly, or seek urgent assessment, for fever, worsening abdominal pain, dizziness or fainting, or heavy or persistent leakage.

If the fluid returns

Fluid may build up again after drainage. That leads to reassessment — not an automatic path to any particular next step. Options the team may discuss include repeat drainage, and, if drainage is needed regularly, a tunnelled catheter.

A tunnelled catheter may allow planned drainage at home. It does not drain continuously, and there is no general home-drainage schedule: the treating service must provide your individual schedule, instructions, supplies, and contact arrangements.

Other management choices for the fluid itself — including diuretics and the albumin discussion in context — are covered in the ascites overview guide. Investigational approaches are not routine alternatives and are not listed here.

Questions to take home

What symptoms should improve — and what should I do if they do not?
How will we decide whether drainage is needed again?
Do I need albumin or additional monitoring?
Who manages a longer-term catheter, if one is placed?
What is the after-hours plan if I have a concern?

Frequently asked questions

Will I be awake during paracentesis?

Yes. You are awake for the procedure, usually lying on your back with your head slightly raised. The skin is cleaned and the area numbed with local anaesthetic before the needle and catheter are placed.

How long does the appointment take?

It varies. Ask the service in advance how long to allow for preparation, drainage, and monitoring — if a large amount of fluid is removed, monitoring can extend the visit.

Will I need albumin?

Sometimes. Albumin may be given intravenously after paracentesis to help prevent low blood pressure, depending on the cause of the ascites and your condition. It is not automatically required for everyone with cancer-related ascites — ask your team whether it is appropriate for you.

What should I watch for after drainage?

Some discomfort at the site is common, and a small amount of fluid leakage can happen. Contact your team promptly, or seek urgent assessment, for fever, worsening abdominal pain, dizziness or fainting, or heavy or persistent leakage.

What happens if the fluid comes back?

Fluid may build up again after drainage. That leads to reassessment — options the team may discuss include repeat drainage or, if drainage is needed regularly, a tunnelled catheter that allows planned drainage at home.

Related guides

Ascites: abdominal fluid buildup in pancreatic cancer — causes, assessment, and management choices.
Complications of pancreatic cancer — blood clots, cachexia, neuropathy, and more.
Imaging — the ultrasound and other scans used in care.

Sources

Canadian Cancer Society — Paracentesis.
Canadian Cancer Society — Fluid buildup in the abdomen (ascites).
Canadian Cancer Society — Supportive care for pancreatic cancer.
Fraser Health — Ascites (symptom guidelines, PDF).
Diagnostic and therapeutic abdominal paracentesis (2023).

This guide is general information about paracentesis for people with pancreatic cancer in Canada, not medical advice, and it does not replace the instructions of the service performing your procedure.

Last reviewed: October 28, 2026 · Report an error