Peritoneal Dialysis at Home: What to Expect

Peritoneal dialysis (PD) is a form of kidney replacement therapy that you perform at home, using the natural lining of your abdomen — the peritoneum — as a filter to remove waste products and excess fluid from your body. Unlike haemodialysis, which requires a machine to filter your blood externally, PD works inside your body, making it a gentler and more continuous form of treatment.

The peritoneum is a thin, membranous tissue that covers the inside of your abdominal wall and the surfaces of your abdominal organs. It has a rich blood supply and a large surface area — roughly the size of a small dining table — making it an effective natural dialysis membrane. When a special cleansing solution called dialysate is placed in the abdominal cavity, waste products and excess fluid from the blood vessels in the peritoneum are drawn across the membrane into the dialysate through the processes of diffusion and osmosis.

To deliver dialysate into and out of your abdomen, a soft, flexible catheter is surgically placed through your abdominal wall. This catheter, known as a Tenckhoff catheter, is permanent and remains in place for as long as you are on PD. It is usually inserted two to four weeks before you start PD, to allow the surgical site to heal. The external portion of the catheter is typically positioned at the side of your abdomen, where it can be comfortably secured under clothing between exchanges.

The basic PD cycle — called an exchange — involves three steps: draining the used dialysate out of your abdomen, filling your abdomen with fresh dialysate, and then allowing the fresh solution to dwell (remain in your abdomen) for a prescribed period while it collects waste and fluid. This cycle is repeated multiple times each day or night, depending on which type of PD you are on.

Many patients are initially nervous about the idea of having fluid inside their abdomen and managing their own treatment. This is entirely understandable. However, the vast majority of PD patients find that the process quickly becomes routine, and they feel confident managing their treatment after completing the training programme. The fluid in your abdomen is not usually noticeable once you are accustomed to it, though you may feel a sensation of fullness, particularly after a fresh fill.

Peritoneal dialysis comes in two main forms, and the choice between them largely comes down to which fits better into your daily life. Both are clinically effective, and your PD nurse will help you decide which is most suitable based on your lifestyle, medical needs, and preferences.

Continuous Ambulatory Peritoneal Dialysis (CAPD) is the manual form of PD. You perform exchanges yourself throughout the day, typically three to four times, using gravity to drain the used dialysate and fill with fresh solution. Each exchange takes approximately 30 to 40 minutes. A common schedule might be an exchange upon waking, one around lunchtime, one in the late afternoon, and one before bed. Between exchanges, the dialysate dwells in your abdomen while you go about your normal activities — hence the word "ambulatory," meaning you are free to move around.

CAPD requires no electricity or machinery, making it the simplest form of PD from a technical standpoint. The exchange process involves connecting a new bag of dialysate to your catheter using a sterile connection system, draining the old solution into an empty drain bag, and then allowing the fresh solution to flow into your abdomen by gravity. The connection systems used today are designed to minimise the risk of contamination and are straightforward to learn.

Automated Peritoneal Dialysis (APD) uses a machine called a cycler to perform multiple exchanges automatically while you sleep. Before bed, you connect your catheter to the cycler, which is loaded with the prescribed number of dialysate bags. The machine handles the draining, filling, and timing of exchanges throughout the night, typically over eight to ten hours. In the morning, you disconnect and go about your day.

APD is popular with working patients, parents of young children, and anyone who prefers to keep their daytime hours free from dialysis-related tasks. The cycler is roughly the size of a small suitcase and is quiet enough to sleep through once you are accustomed to it. Some APD patients also do an additional manual exchange during the day (a "wet day" or "midday exchange") to ensure adequate dialysis, depending on their clearance results.

The clinical outcomes of CAPD and APD are comparable. Your choice may be influenced by factors such as your work schedule, whether you are a heavy or light sleeper, your dexterity and vision (CAPD requires manual handling of connections), and your peritoneal membrane transport characteristics — a measurement that your PD team will assess through a test called a peritoneal equilibration test (PET). Some membrane types respond better to the shorter dwell times used in APD, while others do better with the longer dwells of CAPD.

One of the practical realities of peritoneal dialysis is that your home becomes your treatment centre. While this brings enormous benefits in terms of convenience and independence, it does require some preparation and organisation.

Storage space is the most significant practical requirement. PD supplies are delivered monthly (or sometimes more frequently) and arrive in large boxes. A month's supply of dialysate can take up a substantial amount of space — roughly equivalent to a large wardrobe or a corner of a spare room. You will need a clean, dry, temperature-controlled area to store your supplies. Dialysate should not be stored in a garage or shed where it could be exposed to extreme temperatures, as this can affect the solution's sterility and effectiveness.

Your exchange area should be a clean, well-lit space with minimal traffic and air currents. Many patients designate a corner of their bedroom or a spare room. The area does not need to be sterile like an operating theatre, but it should be clean and free from dust, draughts, and pets during exchanges. If you have animals, they should be kept out of the room while you are performing your exchange. The key is minimising the risk of introducing bacteria to the connection point.

For APD patients, you will need space for the cycler machine near your bed, access to a power socket, and a way to manage the drain fluid. Most patients drain used dialysate directly into a toilet or drain via tubing — your PD nurse will help you work out the most practical setup for your home. Some patients use an extension drain line that reaches from their bedroom to the bathroom, while others keep a large drain container that they empty in the morning.

Before you start PD, your renal unit will usually arrange a home assessment. A PD nurse will visit your home to evaluate your living situation, help you identify the best areas for exchanges and storage, and ensure your home is suitable for PD. They can also advise on any modifications that might be needed, such as additional shelving, improved lighting, or plumbing adjustments for APD drainage.

If your home situation presents challenges — for example, if you live in a small flat with very limited space — discuss this openly with your PD team. They are experienced in finding creative solutions, and what seems like an insurmountable problem often has a workable answer. Many patients in small homes or shared accommodation successfully manage PD with some thoughtful planning.

One of the advantages of peritoneal dialysis is that treatment integrates into your daily life rather than interrupting it. After the initial adjustment period, most patients describe their PD routine as manageable and, in many cases, unremarkable — it simply becomes part of their day, much like taking medication or any other health-related habit.

A typical CAPD day might look something like this: You wake up and perform your first exchange, which takes about 30 to 40 minutes. While the drain and fill are happening, you can sit comfortably, read the news, have a cup of tea, or check your phone — you do not need to remain perfectly still, but you should stay near your exchange equipment. After the exchange, you get dressed, eat breakfast, and go about your morning. Your second exchange might happen around lunchtime — at work, at home, or wherever you have access to a clean space. A third exchange in the late afternoon and a fourth before bed complete the cycle.

A typical APD day is simpler in terms of dialysis-related tasks. Before bed, you spend about 20 minutes setting up the cycler — loading the dialysate bags, connecting the tubing, and starting the programme. The machine runs overnight while you sleep. In the morning, you disconnect, which takes about 10 to 15 minutes, and then proceed with your day. If you require a midday manual exchange, that adds one additional 30-minute task to your day.

Daily tasks beyond the exchanges themselves include caring for your catheter exit site. This involves cleaning the area where the catheter emerges from your skin, checking for signs of redness, swelling, or discharge, and securing the catheter so it does not pull or snag. Your PD nurse will teach you a specific exit-site care routine during your training, and it typically takes only a few minutes each day.

Record-keeping is another daily task. You will be asked to record your weight, blood pressure, the volume and appearance of your drain fluid, and any symptoms after each exchange or each morning after APD. These records help your PD team monitor your treatment effectiveness and catch any early signs of problems. Many patients find it helpful to keep their logbook or recording sheet in their exchange area so it becomes part of the routine.

Peritonitis — an infection of the peritoneal cavity — is the most serious complication of peritoneal dialysis and the most important thing to learn how to prevent. While peritonitis can be treated with antibiotics in most cases, recurrent or severe episodes can damage the peritoneal membrane and may eventually require you to switch to haemodialysis. Prevention is therefore the highest priority in PD care.

The vast majority of peritonitis episodes are caused by bacteria entering the peritoneal cavity through the catheter during exchanges. This means that your technique during connections and disconnections is your single most powerful defence against infection. The golden rules are straightforward but must be followed every single time, without exception:

• Hand hygiene: Wash your hands thoroughly with antibacterial soap before every exchange. This is non-negotiable. Some patients also use alcohol hand gel after washing.
• Wear a mask: A clean surgical mask covering your nose and mouth prevents bacteria from your respiratory tract reaching the connection site. Your household members or anyone present during an exchange should also wear a mask.
• Clean environment: Perform exchanges in a clean, closed room with no draughts, fans, or open windows. Keep pets out. Close doors. Turn off fans and air conditioning that might blow air across your work area.
• No touching: Never touch the connection points of your catheter or dialysate tubing. The connection systems are designed so that sterile surfaces meet sterile surfaces — but only if you do not contaminate them with your fingers.
• Inspect everything: Before every exchange, check that your dialysate bags are intact (no leaks, the solution is clear, the expiry date has not passed), and that all packaging is undamaged.

Recognising the early signs of peritonitis is equally important. The cardinal symptom is cloudy drain fluid — if your used dialysate looks milky, cloudy, or discoloured instead of its normal clear-to-pale-yellow appearance, contact your PD unit immediately. Other symptoms include abdominal pain or tenderness, fever, nausea, and generally feeling unwell. Do not wait to see if it improves on its own — early treatment with antibiotics leads to better outcomes.

Exit-site infections (infections at the point where the catheter exits your skin) are another risk. Daily exit-site care — cleaning the area, checking for redness or discharge, and keeping the catheter secured — helps prevent these infections. If you notice increasing redness, swelling, pain, or discharge at the exit site, report it to your PD team promptly, as untreated exit-site infections can progress to tunnel infections or peritonitis.

With good technique, peritonitis rates have improved dramatically over the past two decades. Current guidelines suggest that a well-trained patient should experience no more than one episode of peritonitis every two to three years or less. Many patients go for years without a single episode. Your technique and vigilance are the most important factors in keeping your peritonitis risk low.

Dietary management on peritoneal dialysis shares some similarities with haemodialysis but has several important differences that reflect the continuous nature of PD and the unique properties of the dialysate solution.

Fluid allowance is typically more generous on PD than on haemodialysis. Because PD removes fluid continuously (or nightly, in the case of APD), rather than in large amounts three times per week, fluid does not accumulate as dramatically between treatments. Many PD patients are allowed 1500 to 2000 millilitres of fluid per day or more, depending on their residual kidney function and ultrafiltration volumes. Some PD patients with good residual function may have minimal fluid restriction at all. This is often cited as one of the most liberating aspects of choosing PD.

Potassium restrictions are also frequently less strict on PD, because the continuous or daily nature of PD means potassium is removed more steadily. Some PD patients can enjoy foods that would be restricted on haemodialysis. However, this varies by individual — your blood test results will guide your specific recommendations.

Phosphorus management remains important on PD, and most PD patients take phosphate binders with meals. Phosphorus accumulates regardless of dialysis modality, and controlling it is essential for long-term bone and cardiovascular health.

Protein is a particularly important dietary consideration on PD. Significant amounts of protein (primarily albumin) are lost through the peritoneal membrane during each exchange — typically 5 to 15 grams per day, and more during episodes of peritonitis. To compensate for these losses, PD patients are advised to eat a higher-protein diet than HD patients. Your renal dietitian will help you identify protein-rich foods and ensure your intake is adequate.

Calorie and glucose management is the dietary factor most unique to PD. The dialysate solution contains glucose, which acts as the osmotic agent that draws excess fluid across the peritoneal membrane. A significant proportion of this glucose is absorbed into your bloodstream during each exchange — potentially 300 to 800 extra calories per day, depending on the concentration and volume of dialysate used. This can lead to weight gain, elevated blood sugar levels, and raised triglycerides. PD patients are generally advised to be mindful of their overall calorie intake and choose nutrient-dense foods rather than empty calories, to offset the glucose load from the dialysate.

As with any form of dialysis, your renal dietitian is an essential member of your care team. They will tailor their advice to your specific situation, taking into account your PD prescription, residual kidney function, body composition, cultural food preferences, and any other medical conditions such as diabetes.

One of the reasons many patients choose peritoneal dialysis is the lifestyle flexibility it offers compared to centre-based haemodialysis. While PD does require daily commitment to your treatment, it gives you far more control over when and where that treatment happens.

Work and education are very achievable on PD. APD patients, in particular, often find that their working day is largely unaffected by dialysis, since treatment happens overnight. CAPD patients who work can perform their midday exchange at work — you need a clean, private space and about 30 to 40 minutes. Some patients use a first-aid room, a private office, or any clean, quiet room. Your employer should be willing to provide reasonable accommodations, and your renal social worker can help facilitate this conversation if needed.

Exercise and physical activity are encouraged on PD, and most patients can continue with sports, swimming, gardening, walking, and other activities they enjoy. Some activities may require modifications — for example, heavy contact sports that could dislodge or damage the catheter are generally discouraged, and swimming requires careful attention to exit-site care. Most PD patients can swim in chlorinated pools and the sea once the exit site is fully healed, though you should check with your PD team for specific guidance. Abdominal exercises may need to be modified to avoid straining the catheter site, but many patients remain physically active and find that exercise helps manage their energy levels, mood, and overall well-being.

Travel is one of PD's strongest advantages over centre-based HD. For travel within the UK, your dialysate supplier (such as Baxter or Fresenius) can arrange deliveries to your destination — a hotel, a holiday cottage, a relative's home. You typically need to give them two to four weeks' notice. For international travel, many suppliers have international delivery networks, and your PD nurse can help you plan ahead. You will need to carry your connection equipment and, if you are on APD, your cycler machine (most cyclers are portable and can be checked as luggage or carried in a dedicated travel case). Airlines are generally accommodating — a letter from your PD unit explaining your medical needs and equipment is usually sufficient.

Intimacy and relationships are understandable concerns for PD patients. The catheter and the presence of fluid in your abdomen can affect body image and may require some adjustment in intimate relationships. Open communication with your partner is important. The catheter can be secured and tucked away during intimacy, and the dialysate can be drained beforehand if the sensation of fullness is uncomfortable. Many couples find that, with time and openness, intimacy continues to be a fulfilling part of their relationship.

While peritoneal dialysis is a versatile and effective treatment, there are situations where it may not be the best option or where a patient may need to transition from PD to haemodialysis. Understanding these scenarios is part of being fully informed about your treatment choice.

Medical contraindications may make PD difficult or impossible for some patients. Extensive previous abdominal surgery can create adhesions (scar tissue) that prevent the dialysate from distributing evenly throughout the peritoneal cavity, reducing treatment effectiveness. Large abdominal hernias may worsen with the added pressure of dialysate fluid. Active inflammatory bowel disease, such as severe Crohn's disease, can compromise the peritoneal membrane. In these cases, your nephrologist may advise against PD from the outset.

Inadequate dialysis clearance can become an issue over time. As your residual kidney function declines (which happens naturally over time for most patients), PD may not provide sufficient waste clearance on its own. Your PD team monitors this through regular blood tests and clearance studies. If your clearance falls below acceptable levels despite adjustments to your PD prescription — such as increasing the volume or number of exchanges — a switch to haemodialysis may become necessary.

Peritoneal membrane failure can occur after years of PD. The peritoneal membrane can undergo structural changes (known as encapsulating peritoneal sclerosis in its most severe form) that reduce its ability to function as a dialysis membrane. While mild membrane changes are common and can be managed by adjusting your PD prescription, significant membrane deterioration may require you to transition to HD. This is one reason why PD is sometimes described as a time-limited modality for some patients, though many people remain on PD for many years.

Recurrent peritonitis is another reason patients may need to move from PD to HD. While a single episode of peritonitis is usually treatable and does not require a change in modality, repeated infections can damage the peritoneal membrane and may indicate that PD is no longer a safe option. If you experience frequent infections despite good technique, your team will discuss whether continuing PD is advisable.

Home and lifestyle factors can also make PD impractical. If your living situation changes significantly — for example, if you lose access to adequate storage or a clean exchange environment — PD may become difficult to maintain safely. Similarly, if your physical or cognitive abilities change such that you can no longer perform exchanges safely and independently, and no care partner is available to assist, transitioning to centre-based HD may be the safest option.

Knowing that PD might not work forever — or might not be the right starting point for everyone — is not a reason to avoid it. For many patients, PD provides years of effective treatment with excellent quality of life. And if a transition to HD becomes necessary, your renal team will support you through the process. The goal is always to find the treatment that works best for you at each stage of your journey.