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Palliative and end-of-life care in advanced renal failure

Lynne Russon and Andrew Mooney
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DOI: https://doi.org/10.7861/clinmedicine.10-3-279
Clin Med June 2010
Lynne Russon
Leeds Teaching Hospitals NHS Trust and Sue Ryder Care, Wheatfields, Leeds
Roles: Consultant in palliative medicine
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  • For correspondence: lynne.russon@suerydercare.org
Andrew Mooney
Leeds Teaching Hospitals NHS Trust
Roles: Consultant renal physician
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Key Words
  • advance care planning
  • advanced kidney disease
  • conservative management
  • end of life

Key Points

There is increasing recognition of the gap in service provision of palliative care for patients with advanced kidney disease (AKD)

Patients with AKD have significant symptom control needs. Symptoms are poorly addressed due to poor recognition and anxiety about prescribing

There are rising numbers of patients with AKD who choose not to have dialysis (conservative care)

This population of patients are usually elderly with multiple comorbidities and are more likely to die in hospital

Advance care planning is an essential part of the renal palliative care clinic and is essential to meet end-of-life priorities of care

End-of-life care for renal patients has previously been inadequate. Such patients have been more likely to die in hospital than many other patients,1 and the symptoms of dying might not historically have been fully recognised by renal physicians caring for them.2,3 The need for specialist palliative care for patients with advanced chronic kidney disease (CKD) has now been recognised.

Part 2 of the National Service Framework for Chronic Kidney Disease4 includes a quality requirement for end-of-life care and recommends a jointly agreed palliative care plan with renal networks establishing links with palliative care services. This is reinforced by the end-of-life care strategy.5 A framework for implementation6 has also been produced which sets out how to achieve these goals.

There is a recognised role for palliative care in patients choosing to withdraw from dialysis, perhaps due to a new diagnosis of terminal illness or progression of comorbidity. There is also a growing role to provide care for patients with advanced CKD who choose not to receive dialysis at all.

Classification

The introduction of the Modification of Diet in Renal Disease formula for estimating glomerular filtration rate (GFR) in CKD has led to the classification of CKD into five stages (Table 1).7 Advanced kidney disease (AKD) refers to patients with late stage 4 and stage 5.

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Table 1.

Classification of chronic kidney disease.7

Incidence of renal impairment in the general and palliative care population

Following the introduction of this assessment of renal function, studies have revealed that a large proportion of the population is affected, with as many as 5% of adults having CKD stage 3 or worse.8 The prevalence is particularly high among elderly patients and those with comorbidity, so the burden might be even higher among patients in the palliative care population. Progression of renal failure is common among these patients, occurring in about three-quarters of them.9,10 However, the number ultimately receiving dialysis is very small, emphasising the need for development of end-of-life services for this cohort of patients.

Symptom control in advanced kidney disease

Patients with AKD have significant symptom control needs, with a symptom profile similar to patients with advanced cancer.11 The most common symptoms include fatigue, breathlessness, pain and itch (Table 2). There are also significant psychological, social and spiritual needs, including coming to terms with their changing role, increasing dependency and financial loss.

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Table 2.

Symptom prevalence in patients with stage 5 chronic kidney disease.12

Prescribing for symptoms

Advanced chronic kidney disease

Pain. Pain in renal failure is often related to renal bone disease and poorly addressed due to anxiety about prescribing and poor recognition.

Codeine and morphine should be avoided in renal failure. If taken regularly, their toxic metabolites, which are renally excreted, accumulate and can quickly cause over-opiation. Clinical trial evidence on the use of strong opioids in renal failure is limited, but in clinical practice oxycodone is better tolerated than morphine and may be used for patients with GFRs of 50–20 ml/min. The metabolites of oxycodone also accumulate and, as GFR falls, lower doses of oxycodone and a longer dose interval may be needed.

When GFR falls below 20 ml/min, buprenorphine and fentanyl preparations should be used. Buprenorphine and fentanyl preparations are better tolerated in severe renal impairment because their metabolites are largely inactive and excreted by the liver. When patients have stable analgesic requirements, transdermal buprenorphine patches may be used for those requiring small to moderate doses, or fentanyl patches if a higher dose is required. Either fentanyl or alfentanil can be used in a syringe driver if more dose flexibilty is needed when GFR is less than 20 ml/min and at the end of life.13

Theoretically, methadone shows little accumulation but has wide interpatient variation and a narrow therapeutic index. It should not be used without specialist advice.14

Non-steroidal anti-inflammatory drugs (NSAIDs) alter glomerular haemodynamics and, as such, are nephrotoxic. They should be used with caution in patients with severe renal impairment, but may be appropriate when the benefits outweigh the burdens such as in the last few days of life. There is no strong evidence that one NSAID has significant ‘renal advantages’ over any other.

Neuropathic pain. Amitriptyline should be titrated from low doses such as 10 mg once daily. No dose adjustment is required.

Gabapentin and pregabalin require significant dose adjustments. The maximum dose of gabapentin with a GFR of less than 30 ml/min is 300 mg daily. If the GFR is below 20 ml/min, very small doses of gabapentin such as 50 mg od are often effective.

Nausea. Patients with renal failure frequently have a chemical cause for nausea and vomiting. Haloperidol, ondansetron and granesitron are therefore the most effective anti-emetics. Levomepromazine is also useful as an antiemetic and sedative in the terminal stages. Haloperidol and levomepromazine have increased sedative effects in renal failure so doses should be reduced, particularly when GFR is less than 10 ml/min, and titrated accordingly. If a prokinetic antiemetic is required, metoclopramide is well tolerated but the dose needs to be reduced when GFR is below 20 ml/min.

Pruritus. Renal osteodystrophy results in low calcium and high phosphate levels, the latter inducing itch. This can be treated by preparations which bind dietary phosphate in the gut. Renal patients tend to have dry, and therefore itchy, skin which can be relieved by regular use of a simple moisturiser such as aqueous cream.

Uraemia can also cause itching, usually when GFR is below 10 ml/min. Antihistamines are not particularly helpful for uraemic itch. There is some evidence that ondansetron, a 5-hydroxytryptamine-3 receptor antagonist, may help both nausea and itch in these patients and that low-dose gabapentin may relieve uraemic itch.15

Renal replacement therapy

Patients on dialysis who require palliative care should, on the whole, be treated in the same way as patients with severely impaired GFR not on dialysis. In peritoneal dialysis, clearance rates of drugs are constant and the timing of doses not important. On haemodialysis, patients will be receiving intermittent treatment but only rarely do drug administration times need adjusting. Dialysis clears non-protein-bound water-soluble drugs of low molecular weight, so usually only intravenous antibiotics need to be adjusted occasionally. The agents described above can be used at any time during the ‘dialysis cycle’.

Conservative management for end-stage renal failure

Many renal services have developed specialised clinics to review patients with significantly impaired GFRs. In our service in Leeds, when GFR falls below 20 ml/min patients are offered education to choose between different treatment modalities – haemodialysis, peritoneal dialysis or transplantation – after which preparations for their chosen treatment are made (Fig 1).

Fig 1.
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Fig 1.

Management options for patients in end-stage renal failure. GFR = glomerular filtration rate.

No dialysis

A further choice is now offered: no dialysis. Patients making this choice are reviewed by a palliative medicine consultant within the renal clinic, and therefore still receive regular medical, nursing and dietetic review, and management of their anaemia to minimise fatigue. However, a greater emphasis is placed on symptom control and social support with a dedicated social worker. These patients tend to be elderly with multiple comorbidities, but as many as one in six patients in our service snow choose this treatment option. There is evidence that patients over 75 years with multiple comorbidities, particularly ischaemic heart disease, may not increase their longevity as a result of receiving dialysis.16

Renal function is monitored regularly, so that this can be optimised and used as a prognostic marker. Phosphate and calcium levels and vitamin D metabolism are also monitored and treated with diet and medication. Uraemic symptoms are assessed and palliated.

Patients who choose to be treated conservatively may continue to live with very low GFRs for some time, but approximately 75% will die within the year.17 Patients opting for conservative treatment tend to die when their GFR reaches approximately 5 ml/min.

Patients who withdraw from established dialysis have a mean survival of 8–11 days.18 Advance care planning should therefore ideally start before dialysis is withdrawn.

Advance care planning

Advance care planning is the process of discussion between an individual and their healthcare professional about future needs.19 Helping a patient establish their priorities in end-of-life care enables them to plan their future and prepare for death, allowing them to maintain control over their wants and wishes.20 Preferences should be communicated to all professionals involved and documented appropriately. There is a significant mismatch between people's preferences regarding where they should die and their actual place of death. Most patients prefer to die at home, but most renal patients tend to die in hospital.1

Summary

There is a recognised need to provide palliative care services for patients with AKD. Such services can improve end-of-life care for patients withdrawing from dialysis and those choosing not to have dialysis. Developments in such services should lead to measurable advances in patients' experiences.

  • © 2010 Royal College of Physicians

References

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Palliative and end-of-life care in advanced renal failure
Lynne Russon, Andrew Mooney
Clinical Medicine Jun 2010, 10 (3) 279-281; DOI: 10.7861/clinmedicine.10-3-279

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Palliative and end-of-life care in advanced renal failure
Lynne Russon, Andrew Mooney
Clinical Medicine Jun 2010, 10 (3) 279-281; DOI: 10.7861/clinmedicine.10-3-279
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