Nutrition and Hydration
Nutrition and hydration care is the nursing assistance that helps a person eat and drink adequately when illness, disability, or dependence interferes with doing so. It includes helping a person take food and fluids, observing and recording intake, monitoring fluid balance, and recognising the risks of undernutrition and dehydration, particularly in older and dependent patients.
Definition
Nutrition and hydration care is the nursing support that helps a person meet their needs for food and fluids and that monitors intake, fluid balance, and nutritional risk when independent eating and drinking is impaired.
Scope
The entry describes the nutrition and hydration domain of basic care: assisting with eating and drinking, observing intake and fluid balance, and recognising nutritional and hydration risk. It frames screening and monitoring at a conceptual level and gives no diets, fluid prescriptions, feeding regimens, or individualised nutritional advice.
Core questions
- What help do dependent people need to eat and drink adequately and safely?
- How are nutritional and hydration risk recognised and monitored?
- How is intake and fluid balance observed and recorded?
Key concepts
- Feeding assistance
- Undernutrition and malnutrition risk
- Dehydration and fluid balance
- Nutritional screening
- Intake and output monitoring
- Mealtime support
Mechanisms
Adequate food and fluid are basic physiological needs, and feeding oneself is one of the activities of daily living captured by functional indices such as the Katz Index, so loss of that ability marks a care need. When a person cannot eat or drink independently, nursing care provides assistance and observes how much is taken; monitoring intake, output, and signs of dehydration supports recognition of fluid imbalance. Older and dependent people are particularly vulnerable to both undernutrition and dehydration, which is why screening for nutritional risk and attention to hydration are emphasised in geriatric care. Identifying risk early allows the wider team to intervene before deficits develop.
Clinical relevance
Maintaining adequate nutrition and hydration supports recovery, wound healing, and overall function, and shortfalls are linked to poorer outcomes, especially in older adults. This entry describes the domain conceptually for learners and is not a basis for prescribing diets, fluids, or feeding for an individual.
Epidemiology
Undernutrition and dehydration are common among hospitalised and long-term-care older adults, driven by reduced appetite, swallowing difficulty, cognitive impairment, dependence, and acute illness. Geriatric nutrition guidance highlights the high prevalence of nutritional and hydration risk in these populations.
Evidence & guidelines
The ESPEN guideline on clinical nutrition and hydration in geriatrics (Volkert et al., 2019) synthesises evidence on screening, nutritional support, and hydration in older people. Eating is also an assessed activity of daily living within functional indices (Katz et al., 1963), and assisting with nutrition and fluids is part of Henderson's account of fundamental nursing care.
History
Helping the sick to take nourishment has always been part of nursing, and concern with diet featured in early nursing writing. In the twentieth century, eating was conceptualised among the activities of daily living and incorporated into functional assessment, while nutritional screening tools and, later, geriatric nutrition guidelines formalised the recognition of undernutrition and dehydration risk in vulnerable populations.
Key figures
- Dorothee Volkert
- Sidney Katz
- Virginia Henderson
Related topics
Seminal works
- volkert-2019
- katz-1963
- henderson-1966
Frequently asked questions
- Why do nurses monitor what a patient eats and drinks?
- Because inadequate intake can lead to undernutrition and dehydration, which slow recovery and worsen outcomes, monitoring intake and fluid balance helps the team recognise and respond to shortfalls early, especially in older and dependent patients.
- Who is most at risk of undernutrition and dehydration?
- Older, frail, cognitively impaired, and acutely ill people who depend on others for eating and drinking are at particular risk, which is why nutritional and hydration screening is emphasised in geriatric and hospital care.