Hydration, nutrition and clinically assisted nutrition/hydration

Reduced appetite and fluid intake are common as dying approaches. This does not remove the duty to offer assistance with eating and drinking where wanted and appropriate. NICE recommends supporting a dying person to drink if they wish and are able, checking swallowing safety, providing frequent mouth and lip care, and helping with sips where appropriate.

The clinical focus should be comfort, preference and safety rather than meeting an arbitrary intake target. Distressing thirst, dry mouth, nausea, swallowing difficulty or delirium should be assessed rather than assuming all reduced intake is an inevitable and untreatable feature of dying.

NICE recommends daily hydration assessment in the last days of life and a discussion of the risks and benefits of hydration options. Clinically assisted hydration may relieve some symptoms related to dehydration, but may also cause burdens such as fluid overload or discomfort. It is uncertain whether giving clinically assisted hydration prolongs life or prolongs the dying process, and uncertain whether not giving it hastens death.

A therapeutic trial is therefore often more clinically honest than an absolute promise. The plan should specify what benefit is being sought, how the person will be monitored, and when the intervention will be reduced or stopped if it causes harm or no longer meets the person's goals.

Clinically assisted nutrition and hydration are medical treatments for decision-making purposes. When a person has capacity, their informed decision governs whether treatment is accepted or refused. When capacity is lacking, the relevant national legal framework must be used. In England and Wales this includes the Mental Capacity Act 2005; in Scotland the Adults with Incapacity framework applies; Northern Ireland requires current operative law and Department of Health guidance.

A family member's distress or preference is important but does not automatically determine the decision. The team should clarify legal authority, prior wishes and values, clinical benefit and burden, and the person's likely perspective.

In An NHS Trust v Y, the UK Supreme Court held that in England and Wales there is no mandatory requirement in every case to seek court approval before withdrawing clinically assisted nutrition and hydration from a patient in a prolonged disorder of consciousness when the Mental Capacity Act and professional guidance are followed and there is agreement about best interests. The case does not mean that courts are irrelevant: disagreement, legal uncertainty or unusual circumstances may require legal advice or judicial determination.

The safe learning point is to avoid absolutes. Do not assume that every CANH decision requires court approval, and do not assume that no case requires court involvement.

Families may fear that reduced food or fluids mean abandonment or deliberate hastening of death. Good explanations distinguish assisted oral intake, mouth care and comfort from a separate decision about a medical treatment. Clinicians should explain what the person is experiencing, what a trial of assisted hydration might realistically achieve, what burdens are possible, and how the plan will be reviewed.

1. A family believes stopping an ineffective assisted-hydration trial is the same as deliberately causing death. The team explains benefit, burden, uncertainty and continuing mouth/comfort care.

2. A patient is thirsty and can still sip safely. Staff prioritise help with oral fluids and mouth care rather than assuming IV fluids are the first response.

3. A team assumes every decision to withdraw CANH requires a court application. Senior/legal advice clarifies that the need for court involvement depends on agreement, uncertainty and the facts of the case.

• Support oral drinking/eating where wanted and clinically appropriate.
• Assess hydration at least daily in the last days of life.
• Discuss benefits, burdens and uncertainty honestly.
• Use therapeutic trials with explicit review criteria where appropriate.
• Apply the correct national capacity/consent framework.
• Distinguish family involvement from formal legal authority.
• Seek senior/legal advice where serious disagreement or uncertainty persists.

Authoritative Stage 2 source map

• S015 - GMC: Treatment and care towards the end of life: good practice in decision making. https://www.gmc-uk.org/professional-standards/the-professional-standards/treatment-and-care-towards-the-end-of-life
• S022 - NICE: NG31 Care of dying adults in the last days of life - recommendations. https://www.nice.org.uk/guidance/ng31/chapter/Recommendations
• S023 - NICE: QS144 Quality statement 4: hydration. https://www.nice.org.uk/guidance/qs144/chapter/quality-statement-4-hydration
• S024 - UK legislation: Mental Capacity Act 2005. https://www.legislation.gov.uk/ukpga/2005/9/contents
• S028 - Scottish legislation: Adults with Incapacity (Scotland) Act 2000. https://www.legislation.gov.uk/asp/2000/4/contents
• S030 - Department of Health NI: Mental Capacity Act (Northern Ireland) 2016 - topic hub. https://www.health-ni.gov.uk/topics/mental-capacity-act
• S038 - UK Supreme Court: An NHS Trust v Y [2018] UKSC 46. https://www.supremecourt.uk/cases/uksc-2017-0202

This module is educational. Recheck high/very-high update-risk sources immediately before publication and follow current local/national policy for clinical use.