Preventing pressure ulcers

Preventing pressure ulcers is a fundamental component of compassionate, high-quality care for individuals with limited mobility. These injuries, commonly known as bedsores or pressure injuries, arise when sustained pressure, friction, or shear disrupts skin integrity, leading to tissue damage that can progress through multiple layers if not identified and managed promptly. 

In the UK alone, pressure ulcers affect an estimated 700,000 people annually and contribute to significant morbidity, prolonged hospital stays, and increased healthcare expenditure. By understanding the underlying mechanisms, identifying individuals at risk early, and implementing evidence-based prevention strategies, care providers can enhance patient comfort, preserve dignity, and reduce avoidable costs. 

This article explores the causes and risk factors, outlines core prevention principles, and presents practical guidance aligned with UK best practice to help clinicians, carers, and organisations embed robust pressure ulcer prevention in every care setting.

Understanding Pressure Ulcers: Causes, Stages, and Risk Factors

Pressure ulcers develop where soft tissues are compressed between a bony area of the body and an external surface, such as a mattress or wheelchair seat. This sustained pressure impairs blood flow, leading to ischaemia and tissue damage. Contributory forces include:

Causes

Sustained pressure exceeding capillary closing pressure (approximately 32 mmHg) leads to reduced perfusion (blood flow to tissues), cell death, and tissue necrosis (irreversible damage or death of tissue). Friction when skin rubs against bedding or clothing and shear, where deeper tissues slide over underlying structures, can further compromise integrity. Incontinence, moisture, and poor nutrition exacerbate vulnerability by weakening the skin’s barrier function, while medical devices such as oxygen tubing or urinary catheters can create focal pressure points if not properly cushioned.

Stages

Pressure ulcers are classified into stages that guide management:

• Stage 1: Non-blanchable erythema of intact skin (redness that doesn’t turn white when pressed, indicating early skin damage), often over bony areas.
• Stage 2: Partial-thickness skin loss with exposed dermis, presenting as a shallow open ulcer or blister.
• Stage 3: Full-thickness tissue loss, potentially exposing subcutaneous fat but not bone or muscle.
• Stage 4: Full-thickness tissue loss with exposed bone, tendon, or muscle, often accompanied by tunnelling or undermining.
• Unstageable: Full-thickness loss obscured by slough (yellow/white soft tissue) or eschar (black, dead tissue).
• Deep Tissue Injury: Persistent non-blanchable deep red, maroon, or purple discolouration.

Accurate staging is crucial for treatment planning and monitoring an individual’s healing progress.

Risk Factors

Key factors that increase pressure ulcer risk include:

• Immobility: Reduced ability to reposition independently, common in post-operative, neurological, or critically ill patients.
• Age: Thinning epidermis and diminished subcutaneous fat in older adults compromise resilience.
• Nutrition: Protein energy malnutrition, vitamin C, or zinc deficiency impairs tissue repair.
• Incontinence: Urinary or faecal moisture and irritants weaken skin and alter pH.
• Comorbidities: Diabetes, vascular disease, and oedema impair circulation and healing.
• Sensory Impairment: Conditions such as neuropathy reduce pain perception, delaying pressure-relief behaviour.

A holistic understanding of these factors underpins targeted prevention and informs individualised care plans.

Impact on Patients and Healthcare Systems

Pressure ulcers can have profound consequences for patients, families, and healthcare services. For individuals, even early-stage ulcers cause pain, sleep disturbance, and emotional distress, undermining quality of life. Advanced ulcers can lead to cellulitis, osteomyelitis, or sepsis, elevating mortality risk; research indicates a fivefold increase in 30-day mortality for hospital-acquired stage 3–4 ulcers. The psychological toll includes reduced self-esteem, social isolation, and heightened anxiety, particularly when chronic wounds necessitate ongoing dressing changes and mobility restrictions.

At the system level, treatment of pressure ulcers is resource-intensive. Dressings, specialised beds, nursing time, and extended hospital stays drive costs upwards: the NHS estimates that managing pressure ulcers costs between £1.4 billion and £2.1 billion annually. Hospitals face bed blocking when patients cannot be discharged until wounds reach a certain level of healing or community services can provide adequate support. Care homes and community nursing teams also experience increased workload, as pressure ulcer management demands skilled assessment, frequent interventions, and interprofessional coordination.

Beyond direct costs, organisations incur indirect consequences, such as reputational damage from avoidable harm, regulatory scrutiny, and potential litigation. The National Institute for Health and Care Excellence (NICE) emphasises that prevention is the most clinically effective and cost-efficient approach, underscoring the imperative to invest in proactive strategies rather than reactive treatments.

Core Prevention Principles

Preventing pressure ulcers hinges on four interrelated principles: risk assessment, pressure redistribution, skin care, and nutritional support. Each principle must be operationalised through clear protocols and multidisciplinary collaboration.

Before detailing each principle, it is crucial to recognise that prevention is not a singular action but a continuous process of assessment, intervention, and review. Successful programmes cultivate a culture where every team member, from porters to senior nurses, understands their role.

Risk Assessment

Early identification of at-risk individuals using validated tools, such as the Waterlow score or the Braden scale, enables tailored interventions. Assessment should occur on admission to any care setting, repeated at least weekly in high-risk patients, and whenever there is a significant change in condition. Scores inform the frequency of repositioning, type of support surfaces, and need for enhanced nutritional monitoring.

Pressure Redistribution

Repositioning schedules (typically every two hours) and the use of specialised mattresses or cushions reduce sustained loading on vulnerable areas. Support surfaces range from foam overlays and alternating-pressure mattresses to advanced low-air-loss beds for those at the highest risk. Selection depends on risk level, mobility, and comorbidities, and should align with clinical guidance, such as NICE CG179 on pressure ulcers.

Skin Care

Maintaining skin integrity requires daily inspection, particularly over the heels, sacrum, and elbows, to detect early changes. Gentle cleansing, application of barrier creams, and prompt management of incontinence protect against maceration. Staff should avoid vigorous rubbing and use pH-neutral, emollient-based products to preserve the skin’s natural defenses.

Nutritional Support

Adequate protein and calorie intake, along with micronutrients such as vitamins A, C, and zinc, are essential for tissue maintenance and repair. Dietitians play a key role in assessing nutritional status and recommending oral supplements, or enteral feeding (where necessary). Hydration also supports skin turgor and resilience.

Embedding these principles into daily care routines and auditing adherence forms the backbone of effective prevention.

Supporting Factors in Prevention

Beyond core principles, various supporting factors from organisational culture to environmental design enhance pressure ulcer prevention efforts. Recognising and strengthening these factors ensures sustainability and continuous improvement.

Staffing and Leadership

Sufficient staffing levels, with an appropriate skill mix, enable timely repositioning and thorough assessments. Clinical leaders and ward managers must champion prevention, allocate resources for training, and ensure that pressure ulcer incidence is monitored as a key performance indicator. Visible leadership fosters accountability and motivates staff to prioritise skin integrity.

Education and Competence

Regular, competency-based training ensures that all staff can identify risk factors, perform skin inspections, and apply preventive measures correctly. Simulation sessions using manikins or case scenarios allow staff to practice repositioning techniques and documentation, reinforcing learning in a safe environment.

Equipment Availability and Maintenance

Prevention relies on ready access to appropriate mattresses, cushions, and pressure-management devices. Maintenance schedules should ensure that equipment functions correctly and include checks for air leaks, pressure settings, and cleanliness. Equipment stores must be well-organised, with prompt replacements when devices are damaged or worn.

Environment Design

Environmental factors, such as bed height, floor surfaces, and lighting, influence prevention by affecting mobility, safety, and visibility during care. Adjustable beds that facilitate gentle repositioning reduce manual handling risks, while non-slippery, cushioned flooring minimises shear during transfers. Good lighting supports thorough skin inspections, particularly for finer details such as early erythema.

Communication and Handover

Seamless communication during shift changes, inter-departmental transfers, and between hospital and community services prevents gaps in prevention efforts. Standardised handover templates should highlight skin integrity status, recent changes, and planned interventions, ensuring continuity of care.

Collectively, these supporting factors create an infrastructure where pressure ulcer prevention is embedded in every aspect of care delivery.

Assessment and Early Detection

Early detection of skin changes allows interventions to halt progression from stage 1 to more severe ulcers. A structured approach to assessment combines validated tools, regular skin inspections, and vigilant observation.

Assessment must be both systematic and responsive, adapting as patient conditions change. To be effective, preventive strategies should evolve in parallel. Embedding regular assessment into routine care ensures timely intervention and reduces the risk of missed opportunities.

Risk Assessment Tools

Validated scales such as the Waterlow, Braden, and Norton tools provide a framework to quantify risk:

• The Waterlow Score rates factors, including build/weight, skin type, mobility, and continence, with scores above 10 indicating high risk.
• The Braden Scale assesses sensory perception, moisture, activity, mobility, nutrition, and friction/shear, guiding frequency of repositioning.
• The Norton Scale is a simpler tool rating physical condition, mental state, and activity, often used in fast-paced settings.

Choosing and consistently applying one tool per setting improves comparability and trend monitoring.

Skin Inspection

Skin inspections should be conducted at every shift, especially for high-risk patients. Staff should inspect for over-bony prominences, using daylight or bright artificial light to detect subtle changes. Early signs, such as non-blanchable redness, slight warmth, or induration (localised hardening of the skin), require immediate pressure relief and protective measures. Documentation should include location, size, stage, and any contributing factors (e.g., moisture, medical devices).

Observations and Documentation

Observation extends beyond visual inspection. Tactile assessment, such as feeling for temperature differences or induration, adds valuable depth to the evaluation process. Documentation in electronic records or paper charts must be clear, timely, and follow a standard format, enabling trend analysis. Tools like flag systems or skin rounds checklists reinforce accountability and ensure that pressure ulcer risk remains visible to all team members.

Timely assessment and meticulous documentation are critical to halting early skin damage and preventing progression to full-thickness injuries.

Training, Documentation, and Care Protocols

Consistency in prevention comes from comprehensive training, robust documentation, and clear, accessible care protocols. These elements support staff at every level, helping them to apply best practice.

Training and protocols transform evidence into routine action. Without them, even the best-intentioned staff may lack guidance or confidence.

Structured Training Programmes

Organisations should implement tiered training programmes: basic awareness for all staff, intermediate skills for those conducting assessments, and advanced competencies for tissue-viability nurses. Courses accredited by professional bodies, such as the Tissue Viability Society, help ensure alignment with current evidence and best practice. Refresher training every 12–18 months keeps skills sharp and ensures staff stay informed about emerging research and innovations in care.

Standardised Documentation

Care protocols should specify required documentation, such as risk-assessment scores, skin-inspection findings, repositioning charts, and nutritional plans. Using electronic health records with mandatory fields helps reduce omissions, while colour-coded alerts (e.g., red flags for high risk) prompt immediate action. Audits of documentation quality identify gaps and inform targeted training.

Evidence-Based Protocols

Protocols must reflect current UK guidance, drawing on NICE CG179, the European Pressure Ulcer Advisory Panel (EPUAP) recommendations, and national quality standards. They outline step-by-step actions for each risk category, from pressure redistribution to referral to specialist care. Easily accessible via intranet portals or laminated quick-reference cards, protocols reduce variation and support decision-making under pressure.

By embedding training, documentation, and clear protocols into clinical governance, organisations ensure that prevention strategies are applied uniformly and effectively.

Patient, Family, and Technology Support

Effective prevention is a partnership between healthcare providers, patients, and families, augmented by technological aids that enhance monitoring and engagement.

Engaging patients and carers fosters shared responsibility and can improve adherence to preventive measures. Technology provides actionable insights and supports timely interventions.

Patient and Family Education

Explaining pressure ulcer risk and prevention strategies in plain language empowers patients and families. Educational materials (brochures, videos, and interactive sessions) demonstrate repositioning techniques, highlight the importance of nutrition, and promote skincare routines. Involving family members in repositioning schedules and skin checks strengthens support networks, particularly in home-care settings.

Technological Aids

Advances in technology offer innovative solutions:

• Pressure-Mapping Systems visualise interface pressures, guiding the selection of support surfaces and positioning.
• Sensor-based Devices embedded in beds or chairs detect immobility and trigger repositioning alarms.
• Telehealth Platforms enable remote consultation with tissue viability specialists, reducing delays in expert advice.
• Mobile Apps allow staff to document assessments at the bedside, upload photos securely, and track healing trajectories.

Adoption of these tools requires investment in infrastructure and training, but can yield measurable reductions in ulcer incidence and improved resource allocation.

Shared Decision-Making

Involving patients in decisions, such as the choice of mattress or repositioning frequency, respects autonomy and may enhance cooperation. Structured discussions document preferences, concerns, and any barriers to adherence, allowing care plans to be tailored and realistic.

Harnessing patient, family, and technological support creates a multi-layered prevention framework that adapts to individual needs and resource constraints, while promoting shared responsibility and long-term resilience in care delivery.

Quality Improvement and National Guidance

Embedding pressure ulcer prevention within a continuous quality improvement (QI) framework ensures that practices evolve with emerging evidence and organisational learning. QI methodologies, such as Plan-Do-Study-Act (PDSA) cycles, provide structured approaches to test changes, measure outcomes, and scale successful interventions.

National Guidance and Standards

Key national resources include:

• NICE Guideline CG179: Comprehensive recommendations on risk assessment, support surfaces, repositioning, and skincare.
• NHS England’s Safety Thermometer: Monthly audits of pressure ulcer prevalence that feed into QI dashboards.
• European Pressure Ulcer Advisory Panel (EPUAP) Guidelines: Internationally recognised best practice on staging, prevention, and management.
• Tissue Viability Society Resources: Training modules, position statements, and audit tools.

Adhering to these standards not only fulfils regulatory expectations but also aligns local practice with evidence-based benchmarks.

Audit and Feedback

Regular audits of ulcer incidence, compliance with risk assessments, and timeliness of interventions identify areas for improvement. Feedback loops involving sharing results in staff meetings and one-to-one discussions motivate change and reinforce accountability. Celebrating successes, such as reduced incidence rates, incentivises continued engagement.

Collaborative Learning

Participation in regional tissue viability networks and quality improvement collaboratives facilitates peer benchmarking and shared problem-solving. Case reviews at morbidity and mortality meetings highlight learning points, while cross-site visits enable transfer of successful practices.

Sustainability and Scale

QI initiatives must plan for sustainability from the outset, securing leadership buy-in, embedding changes in job descriptions, and integrating new processes into electronic health records. Once proven effective, interventions can be scaled across wards, sites, or partner organisations, amplifying impact and fostering a consistent standard of care.

Preventing pressure ulcers demands a multifaceted strategy that integrates scientific evidence, compassionate care, and system-wide commitment. By understanding the pathophysiology, rigorously assessing risk, applying core prevention principles, and leveraging supporting factors, such as staff education, technological innovations, and interdisciplinary collaboration, care providers can substantially reduce the burden of pressure ulcers. Continuous quality-improvement efforts, guided by national standards such as NICE CG179 and EPUAP recommendations, ensure that practices remain current and that every individual receives the safe, dignified care they deserve.

Ultimately, prevention is not just a clinical responsibility – it is a moral one. Embedding these principles into daily practice empowers teams to protect vulnerable individuals, uphold care standards, and foster a culture of vigilance and respect.