Stage 4 CKD: Preparing Without Panic

Stage 4 chronic kidney disease means your eGFR is between 15 and 29 mL/min. Your kidneys are now working at roughly one-fifth to one-quarter of normal capacity.

This is a significant level of impairment. Your kidneys are struggling to keep up with the demands of filtering waste, balancing electrolytes, managing fluid, and producing hormones. But — and this is important — stage 4 is not kidney failure. Most people at this stage are not yet on dialysis.

What stage 4 means practically is that your care team will shift from purely slowing progression to also preparing for what comes next. That preparation — for dialysis access, transplant evaluation, and advanced dietary management — is what this article is about.

The word "preparing" matters more than you might think. Research consistently shows that patients who are prepared for dialysis or transplant before they need it have better outcomes, fewer hospitalisations, and lower anxiety than those who start emergency dialysis without a plan.

At stage 4, symptoms become more noticeable for many patients. Not everyone experiences all of these, but you may recognise some:

• Persistent fatigue: Goes beyond normal tiredness. Related to anaemia (low red blood cells), waste buildup, and disrupted sleep from nocturia.
• Nausea and reduced appetite: As waste products (urea) accumulate, they affect the digestive system. Many patients notice food tastes different or they feel full quickly.
• Itching (pruritus): Caused by phosphorus buildup and disrupted calcium-phosphorus balance. Can be generalised or worse at night.
• Swelling (oedema): Ankles, feet, hands, and around the eyes. The kidneys are less able to remove excess sodium and fluid.
• Muscle cramps: Related to electrolyte imbalances, particularly calcium, potassium, and magnesium.
• Difficulty concentrating: Sometimes called "brain fog." Caused by the accumulation of toxins that healthy kidneys would normally clear.
• Breathlessness: Can result from fluid overload (excess fluid in or around the lungs) or severe anaemia.
• Restless legs: An uncomfortable urge to move the legs, especially at night. Common in advanced CKD and linked to iron deficiency and uraemia.

Report any new or worsening symptoms to your care team. Many are treatable even before dialysis — anaemia responds to iron and EPO injections, itching can be managed with phosphate binders and creams, and fluid overload responds to diuretics and sodium restriction.

If your eGFR is below 20 and declining, your nephrologist will likely discuss dialysis access. This does not mean you need dialysis tomorrow — it means preparing the access point so it is ready when you do.

The preferred access is an arteriovenous (AV) fistula:

• Surgically created connection between an artery and vein in your arm
• Takes 2–6 months to mature before it can be used
• Has the lowest infection rate and longest lifespan of all access types
• This is why it needs to be created well before dialysis starts

If a fistula is not possible: an AV graft (synthetic tube) can be used sooner but has higher complication rates. A central venous catheter is a temporary option but carries the highest risk of infection.

Peritoneal dialysis (PD) is another option that uses the lining of your abdomen as a filter. A small catheter is placed in your belly. PD is done at home, usually daily, and many patients prefer it for the flexibility it offers. Ask your team about both options.

The key message: access planning is not a sign that dialysis is imminent. It is a sign that your care team is planning ahead to give you the best possible start if and when you need it.

Kidney transplant offers the best long-term outcomes for most patients with kidney failure. The evaluation process should start at stage 4 — ideally when your eGFR is below 20 — because:

• The evaluation takes time: Blood tests, cardiac assessment, cancer screening, dental check, and psychological evaluation. This process can take 3–6 months.
• The waiting list is long: Average wait for a deceased donor kidney is 3–7 years depending on blood type and location. Getting listed early maximises your chances.
• Pre-emptive transplant is possible: Some patients receive a transplant before ever starting dialysis (from a living donor). This has the best outcomes of all.
• Living donors: If a family member or friend is willing and compatible, a living donor transplant can be planned to coincide with when you need it.

Not everyone is a candidate for transplant — age, other health conditions, and personal preference all factor in. But everyone with stage 4 CKD should have a conversation with their nephrologist about whether transplant evaluation is appropriate.

Dietary management becomes more specific at stage 4. Your renal dietitian will personalise recommendations based on your blood results, but here are the common adjustments:

• Sodium: Under 2,000 mg per day remains the target. Even more critical now as fluid retention worsens.
• Potassium: May need to be restricted if blood levels are elevated. Focus on lower-potassium fruits and vegetables. Your dietitian can provide a personalised list.
• Phosphorus: Almost always needs restriction at stage 4. Avoid processed foods with phosphate additives. Phosphate binders are often prescribed to take with meals.
• Protein: This is nuanced. Pre-dialysis patients may benefit from a modest reduction in protein intake (0.6–0.8 g/kg/day) to reduce waste production. However, once dialysis starts, protein needs increase significantly. Work with your dietitian — do not guess.
• Fluid: Some stage 4 patients need fluid restriction if they have significant oedema or low urine output. Your team will set a daily limit if needed.

The most important dietary advice at stage 4: work with a renal dietitian. Generic "kidney diet" advice from the internet is not tailored to your blood results, your stage, or your other health conditions. A dietitian creates a plan that is both kidney-safe and actually liveable.

Stage 4 brings conversations that can feel overwhelming: dialysis, transplant, access surgery, dietary restrictions. It is entirely normal to feel anxious, angry, sad, or scared.

What helps:

• Information reduces fear. The unknown is almost always scarier than the reality. Patients who understand their options consistently report less anxiety than those who avoid the topic.
• Talk to someone who has been through it. Kidney patient organisations often connect people at similar stages. Hearing "I felt the same way, and here is what helped" is powerful.
• Involve your family or support person. Bring someone to appointments. Two sets of ears catch more information, and shared understanding reduces the burden.
• Ask about counselling. Many renal units have psychologists or social workers available. There is no weakness in using them — this is a major life change.
• Focus on what you can control. You cannot control your eGFR. You can control your diet, your medication adherence, your blood pressure monitoring, and your preparation.

Grief for the health you expected to have is real and valid. But many people with stage 4 CKD — and even those on dialysis or with transplants — describe finding a new normal that includes meaning, activity, and joy. The adjustment is hard. It is also survivable.

Even at stage 4, your actions matter enormously:

• Take your medications as prescribed. ACE inhibitors, ARBs, SGLT2 inhibitors, phosphate binders, and blood pressure medications are all working to protect your remaining kidney function.
• Attend every appointment. Monitoring frequency increases at stage 4 — typically every 1–3 months. These visits catch changes early.
• Monitor at home. Track your blood pressure, weight (sudden gains suggest fluid retention), and symptoms. Bring records to appointments.
• Follow your dietary plan. Sodium, potassium, and phosphorus management directly affects how you feel day to day.
• Stay active. Exercise is safe and beneficial at stage 4. Even 20 minutes of walking most days improves cardiovascular health, mood, and energy levels.
• Plan ahead. Discuss your preferences for dialysis modality, transplant, and advance care planning with your family and care team.

Stage 4 is not the end of the road. It is a stretch of road that requires more attention, more planning, and more support. With the right preparation, you can face what comes next with clarity instead of fear.