Peritonitis in Peritoneal Dialysis: Causes, Symptoms and Prevention

Peritonitis is a well-recognised complication of peritoneal dialysis (PD) and spotting it early makes treatment faster and simpler. Peritonitis linked to PD dialysis develops when germs reach the peritoneum, the thin lining inside your abdomen that PD uses as a natural filter. This guide covers what causes peritonitis in PD, which symptoms to watch for, how it is diagnosed and treated and how to lower your risk. 

What Is Peritonitis in Peritoneal Dialysis?

Peritonitis is inflammation of the peritoneum, usually caused by a bacterial or, less often, fungal infection. It can happen for many reasons in the general population, such as a ruptured appendix or a stomach ulcer. In peritoneal dialysis, peritonitis often occurs when germs enter the abdominal cavity through the catheter during dialysis exchanges. 

Why PD Patients Are at Higher Risk

• The catheter is a permanent access point into the abdomen, so any lapse in hygiene during an exchange can introduce germs.
• Exchanges happen several times a day, which gives contamination many chances to occur over time.
• Germs around the catheter exit site can travel along the catheter into the peritoneum.
• Having had peritonitis before can raise the chance of getting it again.

Common Causes of PD Peritonitis

Peritoneal dialysis (PD) peritonitis can develop when germs enter the abdominal cavity. Recognising its common causes and early symptoms helps ensure prompt treatment. 

Touch Contamination During Exchanges

The most frequent cause of peritonitis in PD is contamination during an exchange. Germs from hands, surfaces, or equipment can reach the tubing or connectors. Unclean surroundings, poor hand hygiene and tainted equipment all raise the risk.

Exit-Site and Tunnel Infections

An infection where the catheter leaves the skin or along the tunnel under the skin can spread inward. Redness, swelling, pain, or discharge at the exit site is worth reporting early.

Bowel-Related Causes (Constipation, Diverticulitis)

Less commonly, infection starts in the digestive tract. Conditions such as diverticulitis, or a hole in the bowel, can let bacteria into the peritoneal cavity. Constipation is often discussed in this context, so bowel changes are worth raising with your care team.

Signs and Symptoms to Watch For

Common signs of PD-related peritonitis include cloudy drain fluid, abdominal pain and fever. Other symptoms may also occur and should be recognised early to help prevent complications. 

Cloudy Dialysate

Cloudy or unusually coloured drain fluid is often the first sign people on PD dialysis notice when peritonitis develops. The fluid may also contain white flecks, strands, or clumps of fibrin. 

Abdominal Pain and Tenderness

Pain or tenderness in the belly is common, along with bloating or a feeling of fullness. Severe pain that makes it hard to sit still needs urgent medical attention.

Fever, Nausea and Vomiting

Other possible symptoms include:

• Fever
• Nausea or vomiting
• Loss of appetite
• Diarrhoea
• Tiredness
• Reduced urine
• Confusion

Symptoms can vary, but peritonitis during peritoneal dialysis can progress quickly without prompt treatment. 

How PD Peritonitis Is Diagnosed and Treated

Peritonitis in PD is diagnosed through dialysate testing and treated with antibiotics. Severe or persistent infections may require catheter removal and a temporary switch to haemodialysis. Prompt treatment helps reduce the risk of serious complications.

Dialysate Cell Count and Culture

Your care team will typically examine a sample of the drained fluid. A cell count shows whether infection-fighting white cells are raised and a culture identifies which germ is responsible. They may also ask about your symptoms and examine your abdomen.

Intraperitoneal Antibiotics

Treatment generally relies on antibiotics, often delivered directly into the dialysis fluid and sometimes started before culture results are back. Many episodes clear with prompt treatment, but your nephrologist decides the exact plan.

When Catheter Removal or a Switch to Haemodialysis Is Needed

Severe, repeated, or fungal infections may need the PD catheter to be removed. In that case, a temporary or longer-term move to haemodialysis may be needed while the abdomen recovers. 

How to Prevent Peritonitis in Peritoneal Dialysis

Knowing how to prevent peritonitis in peritoneal dialysis comes down to consistent habits.

Hand Hygiene and Clean Exchange Technique

• Wash your hands before touching the catheter, scrubbing under nails and between fingers.
• Follow your exchange steps exactly as you were trained.
• Wear a surgical mask during exchanges.
• Store supplies in a clean, dedicated place. 

Daily Exit-Site Care

• Clean the skin around the catheter every day with the antiseptic your care team recommends.
• Check the site for redness, swelling, or discharge.
• Ask your team to confirm you are caring for the catheter correctly.

Preventing Constipation

• Follow dietary and fluid guidance from your renal dietitian.
• Stay as active as your care team advises.
• Mention ongoing bowel changes early, rather than managing them alone.

Regular Retraining and Follow-Ups

• Attend refresher sessions, since technique can slip without you noticing.
• If you have had peritonitis before, ask whether extra preventive measures suit you. Your clinician decides this and you should not start any medicine on your own.

When to Contact Your Dialysis Care Team

Contact your care team right away if you notice any of the following:

• Cloudy, discoloured, or flecked drain fluid.
• New or worsening belly pain or tenderness.
• Fever, chills, nausea, or vomiting.
• Redness, warmth, pain, or discharge around the exit site.
• Fluid with an unusual smell.

Call emergency services if you have severe abdominal pain. Do not wait for symptoms to pass.

Conclusion

Peritonitis related to PD dialysis is a recognised risk, but most episodes can be managed when caught early. Cloudy fluid, abdominal pain and fever are the key warning signs and careful hand hygiene, exit-site care and regular retraining are the best defences against PD-related peritonitis. 

NephroPlussupports people on peritoneal dialysis with training and care guidance and offers in-clinic dialysis and dialysis on call if a temporary switch to haemodialysis is ever needed. Contact your nephrologist or dialysis care team promptly if you notice symptoms of peritonitis during peritoneal dialysis. 

FAQs

How common is peritonitis in peritoneal dialysis patients?

Peritonitis is one of the more commonly reported complications of PD and PD is a recognised cause of peritonitis. How often it occurs varies from person to person. It largely depends on exchange hygiene, catheter care and how well you keep up with training. With consistent habits, many people go long periods without an episode. If you have had peritonitis on PD before, your risk may be higher, so your team may monitor you more closely. 

Is cloudy dialysate always a sign of peritonitis?

Cloudy fluid is the classic early warning sign of peritonitis in PD dialysis that people are taught to look for. It is not always the cause, but you cannot tell by looking, so any cloudy, discoloured, or flecked fluid should be reported immediately. Your team can test a sample to confirm what is happening. Waiting to see if it clears up can allow an infection to progress.

Can peritonitis be treated at home?

Some episodes are managed with antibiotics delivered through your usual PD exchanges, following your care team’s instructions. Diagnosis still needs a fluid sample tested and severe pain, high fever, or being unable to keep fluids down may need hospital care. Never start or change antibiotics without guidance from your dialysis team.

Can I continue peritoneal dialysis after an episode of peritonitis?

Often, yes. A single episode that responds well to treatment does not usually mean stopping PD. Repeated, severe, or fungal infections are more likely to need catheter removal and a move to haemodialysis. Your nephrologist will weigh your history and advise on the safest way forward.

How can I lower my risk of peritonitis during exchanges?

The steps for how to prevent peritonitis in peritoneal dialysis are:

• Wash your hands thoroughly before every exchange.
• Follow your trained technique exactly.
• Wear a mask.
• Keep your exchange area and supplies clean.
• Clean the exit site daily.
• Attend retraining sessions.
• Report any exit-site changes or early symptoms promptly.