5 Signs It’s Time to Refer a Patient for Dialysis

Timing is critical in managing chronic kidney disease. Referring a patient for dialysis too early can be unsettling for the patient, but referring too late can be life-threatening. How do you know when it’s the right time to start dialysis? Here are five clear signs that it may be time to refer a patient to dialysis (or to a nephrologist, if not already under specialist care). Recognising these indicators can help ensure your patient transitions to dialysis at the optimal time to preserve their health and quality of life.

When is Dialysis Needed?

Dialysis is typically considered in end-stage renal disease (ESRD), which corresponds to Stage 5 chronic kidney disease (CKD). At this point, the kidneys are functioning at roughly 10-15% of normal capacity (eGFR ~15 mL/min or less. However, the decision isn’t based on any particular laboratory test or any specific number. It is based on whether your symptoms are consistent with advanced and whether dialysis has the potential to relieve those symptoms.

Primary care providers play a crucial role in recognizing when a patient’s chronic kidney disease has progressed to the point that dialysis (or a kidney transplant) should be planned. Early referral to a nephrologist by CKD Stage 4 (eGFR < 30) is recommended so that preparations (such as creating an access for hemodialysis) can be made well in advance. Below are five key signs that dialysis may be needed soon.

5 Key Signs It’s Time for Dialysis Referral

1. Severely Reduced Kidney Function (eGFR ~15 or below)

If a patient’s glomerular filtration rate (GFR) has fallen to approximately 15 mL/min/1.73m² or less, they are in Stage 5 CKD, which is kidney failure. At this level of function, toxins and fluids build up rapidly. Most patients will need to start dialysis or get a transplant around this stage, especially if the decline is progressive. An eGFR around or below 10 is often used as a clear cutoff for initiating dialysis in asymptomatic patients, but many will start earlier if symptoms demand it. In practical terms, if your patient’s labs show an eGFR in the mid-ten and dropping, it’s time to have a serious conversation about dialysis options and referrals. Early planning allows time to educate the patient and establish dialysis access (for example, arranging for an AV fistula to be placed a few months before dialysis is).

2. Uremic Symptoms – The Patient Feels Sick from Toxin Buildup

Numbers aside, how the patient feels is paramount. Uremia refers to the buildup of waste products in the blood due to kidney failure, and it causes a constellation of symptoms. Key uremic symptoms include:

• Nausea and vomiting (especially in the mornings)
• Loss of appetite and a metallic taste in the mouth
• Fatigue and weakness that is beyond usual tiredness
• Itching (pruritus) that is often diffuse and not explained by other causes
• Mental cloudiness or difficulty concentrating; in more severe cases, confusion or even encephalopathy

If a patient with advanced CKD is experiencing these symptoms despite optimal medical management, it’s a strong sign that toxins are accumulating to levels that dialysis could relieve. In fact, many of these symptoms (nausea, poor appetite, itching) often improve once dialysis is started. Do not delay referral if uremic symptoms are present; the patient will likely feel much better once on therapy.

3. Uncontrolled Fluid Overload (Edema, Pulmonary Congestion)

Healthy kidneys balance fluid in the body. In kidney failure, patients often retain water, leading to edema (swelling in legs, feet, or even the face) and fluid in the lungs. If your patient has:

• Swelling that does not respond well to diuretics (e.g., still very swollen despite high-dose furosemide)
• Shortness of breath due to fluid in the lungs (pulmonary edema), crackles on lung exam, or frequent hospitalisations for heart failure exacerbations
• High blood pressure that is difficult to control due in part to fluid retention

…then dialysis might be needed to remove the excess fluid. The most dangerous manifestation is when fluid builds up in places like around the heart. Uremic pericarditis (inflammation of the lining of the heart due to uremia) or significant fluid in the pericardial sac is an absolute indication to start dialysis emergently. In short, if fluid overload is impairing your patient’s breathing or heart function and can’t be managed with medications, it’s time for dialysis.

4. Dangerous Electrolyte or Metabolic Abnormalities

Kidney failure leads to abnormal levels of electrolytes and other blood chemistries. Some of these can be acutely life-threatening:

• Hyperkalemia (High Potassium): The kidneys excrete potassium; in failure, potassium can rise to dangerous levels, risking fatal heart arrhythmias. If a patient’s potassium is persistently high (e.g., >6.0 mEq/L) despite dietary restrictions and medications, dialysis is indicated to prevent cardiac arrest.
• Metabolic Acidosis: Failing kidneys cannot excrete acid. If bicarbonate levels are very low (severe acidosis) and the patient has symptoms (like rapid breathing or confusion) or the acidosis is refractory to oral bicarbonate supplements, dialysis will help clear the acid.
• Rising BUN/Creatinine: While absolute numbers alone don’t dictate dialysis, a very high blood urea nitrogen (BUN) indicates severe toxin buildup. For example, a BUN significantly over 100 mg/dL suggests profound uremia. In the context of symptoms, this lab value supports the need for dialysis.
• Other lab issues: such as severe hyperphosphatemia or pericardial fluid on imaging, can also be cues.

If you’re frequently managing dangerous electrolyte imbalances in a CKD patient, it’s safer for them to be on dialysis. These issues often correlate with the symptoms mentioned above, but sometimes a lab abnormality (like a sudden spike in potassium) can be the first clear sign.

5. Significant Weight Loss or Malnutrition

Monitoring nutritional status in CKD is crucial. A patient who is losing weight without trying, especially muscle mass (signs of protein-energy wasting), or who reports a markedly poor appetite and low food intake, may be entering the stage where dialysis is needed. Unintended weight loss in a Stage 5 CKD patient is a red flag. Often, this happens due to persistent nausea and taste changes, or the energy spent by the body dealing with toxins. Weight loss and malnutrition in kidney failure are associated with worse outcomes. Dialysis can improve appetite and nutritional status by clearing toxins that suppress hunger. If you notice your patient has a declining albumin level, significant muscle wasting, or just looks cachectic, it is time to act. Early dialysis may prevent further nutritional decline.

Early Referral and Preparation

Ideally, patients should be referred to a nephrology service before any of the above signs become critical. Early referral (by CKD Stage 4) enables:

• Education: Patients can learn about dialysis modalities (hemodialysis vs peritoneal dialysis, in-center vs home) and even consider preemptive transplant.
• Access placement: For hemodialysis, a surgical access (fistula or graft) needs to be placed, which can take weeks or months to mature. Early referral ensures the patient isn’t stuck using an emergency catheter long-term.
• Smoother transition: Starting dialysis is a big adjustment. It’s smoother when it’s planned. The patient can meet the dialysis team, tour the facility (such as RenoCare Bredasdorp), and mentally prepare, rather than starting during a crisis hospitalization.

As a healthcare provider, if you observe the signs above, it’s prudent to initiate referral to a dialysis center. Some signs (like high potassium or pericarditis) warrant emergency dialysis via hospital admission. In other cases, you may have the opportunity to refer the patient outpatient to a facility like RenoCare for an evaluation and timely initiation.

Partnering with RenoCare for Timely Care

RenoCare  is equipped to assist doctors and patients in assessing the need for dialysis and initiating treatment at the right time. If you have a patient showing the signs mentioned, our team is ready to provide a thorough evaluation and, if appropriate, help the patient smoothly transition onto dialysis.

We work closely with referring physicians, keeping you informed of your patient’s status. Our goal is to support both you and your patient through the dialysis start-up process. By referring a patient to RenoCare, you ensure they get:

• Expert nephrologist consultation and confirmation that dialysis is indicated.
• Education and choice about dialysis options (we offer in-center hemodialysis and can coordinate training for peritoneal or home dialysis if the patient is a candidate).
• Quick access placement assistance or catheter placement if needed urgently.
• Ongoing emotional and nutritional support for the patient and family as they adjust.

If you’re a physician in the Bredasdorp area (or the Overberg region), feel free to call RenoCare Bredasdorp to discuss a patient’s case or arrange a referral. We welcome collaboration to achieve the best outcomes for patients with advanced kidney disease, or contact your local branch near you.

For patients and family members reading this: if you recognise these signs in yourself or your loved one, speak with your doctor about dialysis. You can also reach out to us at RenoCare for information. We are here to help, ensuring that when dialysis is needed, it happens at the right time and in the best way for the patient.