Chronic Renal Failure in the Elderly: Symptoms, Diet and Care

When Ana noticed that her 78-year-old mother had begun feeling far more tired than usual and that her ankles were constantly swollen, she put it down to old age. It was only at a routine medical check-up that they discovered her kidneys were actually functioning at less than half their normal capacity. Chronic kidney disease is a condition that affects millions of elderly people worldwide, yet it often goes undetected until symptoms become apparent.

For families caring for ageing parents or grandparents, understanding this disease and its implications can make the difference between effective management and serious complications. The kidneys are vital organs that filter toxins from the blood, regulate blood pressure and maintain the body's mineral balance. When their function gradually deteriorates, the senior's overall health is affected.

This article provides the essential information you need to recognise warning signs, adapt diet and lifestyle, and make the best decisions regarding the care of your loved one.

Contents

1. What chronic kidney disease is and why older people are vulnerable
2. Warning signs that family members can spot at home
3. How medications affect kidney function in older people
4. An adapted diet for kidney disease
5. Managing hydration correctly
6. Daily care: home versus specialist care facility
7. Useful questions for the nephrologist or geriatrician
8. When to go to hospital as an emergency
9. Frequently asked questions

What chronic kidney disease is and why older people are vulnerable

Chronic kidney disease involves the progressive and irreversible decline of kidney function over a period of months or years. Unlike acute kidney failure, which can occur suddenly and is often reversible, the chronic form develops slowly and requires long-term management. Doctors classify the disease into five stages, depending on how well the kidneys are still filtering the blood.

Older people are particularly vulnerable for several reasons. As we age, the kidneys naturally lose some of their filtering capacity — it is estimated that after the age of 40, kidney function declines by approximately 1% per year. Added to this is the higher prevalence of chronic conditions such as diabetes and high blood pressure, which are the most common causes of chronic kidney disease.

Main risk factors in older people

• Diabetes mellitus — high blood sugar levels damage the small blood vessels in the kidneys
• High blood pressure — elevated pressure impairs filtering capacity
• Cardiovascular disease — poor circulation reduces oxygen supply to the kidneys
• Long-term use of certain medications — non-steroidal anti-inflammatory drugs, antibiotics
• Recurrent urinary tract infections — these can cause permanent damage
• Urinary tract obstructions — enlarged prostate in men, kidney stones

The good news is that, when detected early, chronic kidney disease can be slowed significantly through lifestyle changes, appropriate medication and careful monitoring.

Warning signs that family members can spot at home

One of the major challenges of chronic kidney disease is that in its early stages it can be entirely without symptoms. Symptoms often only become apparent when kidney function is already impaired by more than 60–70%. This is why careful observation by the family is essential for early detection.

Visible physical symptoms

• Swelling (oedema) — around the ankles, feet, hands or face, particularly in the morning
• Changes in urination — foamy or darker urine, needing to urinate frequently at night
• Extreme fatigue and weakness — your loved one sleeps more and no longer has the energy for everyday activities
• Dry skin and persistent itching — accumulated toxins can cause intense irritation
• Unexplained weight loss or loss of appetite
• Metallic taste in the mouth or unpleasant breath odour — a sign of urea build-up

Cognitive and emotional symptoms

Many families do not associate behavioural changes with kidney problems, but accumulated toxins can affect brain function. Be alert to confusion, difficulty concentrating, increased irritability or even episodes of disorientation. These may be signals that the kidneys are no longer eliminating metabolic waste effectively.

If you notice any of these signs, it is important to arrange a medical appointment as soon as possible. Simple blood and urine tests can confirm or rule out a suspicion of kidney disease.

How medications affect kidney function in older people

Most older people take several medications simultaneously for various conditions — a phenomenon known as polypharmacy. What many do not realise is that the kidneys are responsible for eliminating the majority of medications from the body, and when their function is impaired, dangerous build-ups or severe adverse effects can occur.

Some medications are not only processed by the kidneys but can actually damage their function. Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen, commonly used for joint pain, reduce blood flow to the kidneys and can worsen existing kidney disease. Likewise, certain antibiotics, diuretics and heart medications require dose adjustments when the kidneys are not functioning optimally.

What you should do as a family

1. Draw up a complete list of medications — include dietary supplements, vitamins and any medications taken occasionally
2. Inform the nephrologist about all treatments — including those prescribed by other specialists
3. Never stop a medication without medical advice — even if you read that it could affect the kidneys
4. Be mindful of over-the-counter medications — many are eliminated via the kidneys and can be problematic
5. Ask about safer alternatives — for pain or other common symptoms

Open communication with all the doctors caring for your loved one is essential. If necessary, designate a family member to coordinate medical information and attend important consultations.

An adapted diet for kidney disease

Diet plays a crucial role in managing chronic kidney disease. What an older person eats directly influences how hard the kidneys have to work and how many toxins accumulate in the blood. A tailored renal diet can slow the progression of the disease and significantly improve quality of life.

Protein: a delicate balance

Proteins are essential for maintaining muscle mass, but their metabolism produces urea, which must be eliminated by the kidneys. In advanced stages of the disease, the doctor or dietitian may recommend moderate protein restriction, favouring higher-quality sources such as fish, eggs and white meat in controlled portions. Avoid severe restrictions without medical guidance, as malnutrition in older people is a serious concern.

Foods to limit or avoid

• Salt and salty foods — processed meats, tinned foods, crisps, ready-made sauces; salt raises blood pressure and causes fluid retention
• Foods high in potassium — bananas, oranges, tomatoes, potatoes, spinach; excess potassium can cause serious heart problems
• Foods high in phosphorus — dairy products, nuts, seeds, chocolate, carbonated drinks; accumulated phosphorus weakens bones
• Processed foods — these contain additives and preservatives that place extra strain on the kidneys

Recommended foods

• Vegetables low in potassium: cabbage, carrots, cauliflower, cucumber
• Permitted fruits: apples, pears, grapes, strawberries (in moderate quantities)
• Wholegrains in controlled portions
• Healthy fat sources: olive oil, avocado (in small amounts)
• Egg whites as a source of protein

Each patient has different needs depending on the stage of the disease and any associated conditions. Consulting a dietitian specialising in kidney disease is strongly recommended in order to create a personalised plan that takes into account individual food preferences and medical context.

Managing hydration correctly

Hydration is a complex issue in chronic kidney disease. Unlike the general advice to drink plenty of water, patients with advanced kidney problems may need to limit their fluid intake to avoid overload and fluid accumulation in the body, which can lead to swelling, breathing difficulties and raised blood pressure.

In the early stages, adequate hydration is encouraged and helps the kidneys to function better. As the disease progresses and urine output decreases, the doctor will establish a precise daily fluid allowance, which may include not only water but also soups, tea, coffee, and fruits and vegetables with a high water content.

Practical tips for managing fluids

1. Use a graduated bottle or glass to measure the fluids consumed
2. Spread the permitted amount throughout the day to avoid feeling thirsty
3. Spit out water after rinsing your mouth rather than swallowing it
4. Suck on ice cubes or frozen lemon slices to ease thirst
5. Avoid very salty foods, which intensify thirst
6. Keep a diary of fluids consumed and daily body weight

Daily weight monitoring is essential — a sudden increase may indicate fluid retention. If your loved one weighs themselves every morning, at the same time and under the same conditions, any significant variation can be reported promptly to the doctor.

Daily care: home versus specialist care facility

The decision about where a person with chronic kidney disease will be cared for depends on multiple factors: the stage of the disease, the presence of other conditions, the family's resources and the senior's own preferences. Many families want to keep their loved ones at home for as long as possible, which is entirely achievable in the early and moderate stages of the disease.

Home care

When the kidneys are still functioning at a reasonable level and there are no major complications, home care with regular medical support is often the best option. The family must be prepared to manage the specialist diet, administer medications as prescribed, monitor blood pressure and weight, and remain alert to signs of deterioration.

The advantages of home care include keeping the senior in a familiar environment, lower costs compared to residential care, and the possibility of actively participating in family life. However, it requires consistent dedication and medical knowledge on the part of the carers.

When round-the-clock supervision becomes necessary

There are situations in which home care becomes insufficient or unsafe for the senior's health. A specialist care facility or permanent medical assistance becomes necessary in the following circumstances:

• End-stage kidney disease — when frequent dialysis and constant medical monitoring are required
• Severe and frequent complications — recurrent infections, dangerous electrolyte imbalances, associated cardiovascular problems
• Loss of independence — when the person can no longer carry out basic activities without constant assistance
• Exhaustion of family carers — caring can become overwhelming and affect the health of those providing it
• The need for regular dialysis — some facilities offer integrated dialysis and care services

Choosing a specialist care facility for people with kidney disease is an important decision. Check whether the staff are trained in managing renal diets, administering specific medications and recognising complications. Visit several facilities, speak with the staff and, if possible, talk to other families who have experience with those particular settings.

Useful questions for the nephrologist or geriatrician

Medical consultations can be overwhelming, especially when you receive a serious diagnosis. Many families only realise after leaving the surgery that they forgot to ask essential questions. Preparing a list of questions in advance helps you to obtain the information needed to make informed decisions.

Questions about diagnosis and prognosis

• What stage is the kidney disease at, and what does this mean in practical terms?
• What is the main cause of kidney failure in our case?
• How quickly can the disease progress, and what factors influence its course?
• Is there a chance of improvement, or only of slowing progression?

Questions about treatment and lifestyle

• Which medications are absolutely necessary, and what are the possible side effects?
• How should the doses of current medications be adjusted given the kidney problems?
• What strict dietary restrictions must be followed, and how flexible can they be?
• How much fluid can be consumed daily, and how do we monitor this?
• What level of physical activity is recommended or permitted?

Questions about monitoring and emergencies

• Which tests need to be repeated and how often?
• What symptoms indicate a worsening of the condition and require urgent medical attention?
• When should we consider dialysis and how do we prepare for it?
• Is there educational support or support groups for patients and families?

Do not be afraid to ask the doctor to repeat or explain complex medical terms. Write down the answers or, with the doctor's agreement, record the consultation so you can listen back to the information at home, in a less stressful environment.

When to go to hospital as an emergency

Chronic kidney disease can remain relatively stable for a long time, but there are moments when acute, life-threatening complications develop that require immediate medical intervention. Recognising these signs could save your loved one's life.

Warning signs requiring emergency medical attention

• Severe difficulty breathing or very rapid breathing — may indicate fluid accumulation in the lungs
• Chest pain or irregular heartbeat — elevated potassium can cause dangerous arrhythmias
• Severe confusion, extreme drowsiness or loss of consciousness — a sign of toxins reaching critical levels
• Seizures — these can occur due to severe electrolyte imbalances
• Sudden sharp reduction or complete cessation of urination — may indicate a blockage or acute deterioration
• Rapid and severe swelling — particularly of the face, abdomen or limbs
• Unusual bleeding — blood in the urine, very dark stools, bruising that appears without injury
• Persistent nausea and vomiting — which prevents adequate hydration and the taking of medications

In these situations, do not wait until the next day or until the next scheduled appointment. Call 112 or go immediately to the nearest accident and emergency department. Inform the medical staff of the chronic kidney disease diagnosis and the medications the older person is taking.

It is useful to always keep a folder of recent medical documents readily to hand: the latest test results, a list of medications with exact doses, medical letters and the nephrologist's contact details. In an emergency, this information can speed up and improve the care received.

Frequently asked questions

Can seniors with kidney disease travel?

Yes, in the early and moderate stages of the disease, travel is possible with careful planning. It is essential to ensure access to medical care at the destination, to have an adequate supply of medications, and to maintain dietary restrictions. For patients on dialysis, travel requires coordination with dialysis centres in the areas being visited.

How often should medical tests be carried out?

The frequency depends on the stage of the disease. In the early stages, blood and urine tests may be done once every three to six months. As the disease progresses, monitoring becomes more frequent — monthly or even weekly in advanced stages. The nephrologist will establish a personalised schedule.

Is chronic kidney disease hereditary?

Kidney failure itself is not inherited, but some of its causes may have a genetic component — for example, polycystic kidney disease or type 2 diabetes. If there is a family history of kidney disease, it is advisable for close relatives to have regular preventive check-ups.

Can I improve the diet without a specialist dietitian?

Although a great deal of general information is available, a renal diet requires personalisation based on the stage of the disease and test results. What is recommended for one patient may be unsuitable for another. Consulting a dietitian experienced in kidney disease is the safest investment in long-term health.

How much does caring for a senior with kidney disease cost?

Costs vary considerably depending on the severity of the disease and the care options chosen. Medications and consultations may be partially covered by the health system. Dialysis represents the greatest expense in advanced stages. Home care is generally more affordable than residential care, but requires time and dedication from the family.

Can the progression of the disease be stopped entirely?

Chronic kidney disease is, by definition, a progressive and irreversible condition. However, through strict control of its causes (diabetes, high blood pressure), an appropriate diet and proper treatment, progression can be slowed significantly, allowing a good quality of life to be maintained over long periods of time.

Conclusion

Caring for a senior with chronic kidney disease is a complex responsibility, but with the right information and adequate medical support, the family can ensure their loved one a dignified and comfortable life. Every action counts: from carefully monitoring symptoms to preparing the right meals and administering medications on time. If you feel the burden is becoming overwhelming, do not hesitate to seek help — whether from home care specialists or by exploring specialist care options. Speak openly with the nephrologist, ask all the questions that are on your mind and take an active part in treatment decisions. Together, you can meet this challenge with care and dignity.

This article is for informational purposes only and does not replace medical consultation. For specific situations, please consult a nephrologist or geriatrician.