Pressure Injuries and Skin Integrity in Older Adults

Pressure injuries represent one of the most preventable yet persistently common harms in older adult care, affecting an estimated 2.5 million patients annually in United States acute care settings alone (Agency for Healthcare Research and Quality, Preventing Pressure Ulcers in Hospitals). Skin integrity in aging adults deteriorates through predictable physiological mechanisms, making this a clinical priority across hospital, nursing facility, and home care environments. This page covers the classification system for pressure injuries, the biological and mechanical processes that drive them, the settings where they most frequently occur, and the clinical decision points that guide prevention and treatment. The regulatory landscape governing pressure injury reporting intersects directly with the regulatory context for geriatrics and with federal quality metrics for long-term care.

Definition and scope

The National Pressure Injury Advisory Panel (NPIAP), the primary standards body for this condition in the United States, defines a pressure injury as "localized damage to the skin and underlying soft tissue usually over a bony prominence or related to a medical or positioning device" (NPIAP, 2019 Staging Consensus Definitions). The NPIAP formally replaced the term "pressure ulcer" with "pressure injury" in 2016 to more accurately reflect that tissue damage can exist without an open wound.

Scope is significant. The Centers for Medicare & Medicaid Services (CMS) classifies hospital-acquired pressure injuries as a "never event" category—a serious reportable event that triggers non-payment under the Hospital-Acquired Condition Reduction Program (CMS, HAC Reduction Program). In skilled nursing facilities, pressure injury rates are tracked as part of the Five-Star Quality Rating System and reported through the Minimum Data Set (MDS) 3.0.

Older adults face disproportionate risk because aging skin undergoes measurable structural changes: epidermal thickness decreases by approximately 6.4% per decade after age 30 (Farage et al., published in Advances in Wound Care, cited by AHRQ), collagen content declines, and dermal-epidermal adhesion weakens. These changes reduce the skin's capacity to tolerate sustained pressure, shear, friction, and moisture.

How it works

Pressure injuries develop through a convergence of four primary mechanical forces acting on compromised tissue:

  1. Pressure — Sustained compression between a bony prominence (sacrum, heel, ischium, occiput) and an external surface occludes capillary blood flow. Capillary closing pressure is approximately 32 mmHg; pressures exceeding this threshold for extended periods initiate ischemic injury.
  2. Shear — Tangential forces, most commonly from bed elevation or transfers, cause internal tissue layers to slide against each other, disrupting perforating blood vessels.
  3. Friction — Surface contact during movement abrades the epidermal layer, removing the first barrier against deeper injury.
  4. Moisture — Prolonged exposure to urine, feces, sweat, or wound exudate maceratesthe stratum corneum, reducing tensile strength by as much as 40% in controlled studies.

The NPIAP staging system classifies injuries into six categories:

A distinction critical in clinical and legal settings: device-related pressure injuries arise from medical equipment (nasal cannulas, endotracheal tube holders, compression devices, casts) and conform to the shape of the device. They are classified using the same staging system but documented separately, as the NPIAP distinguishes them etiologically.

Common scenarios

Pressure injuries concentrate in specific care contexts where mobility is restricted and monitoring is inconsistent.

Long-term care facilities carry the highest institutional burden. CMS MDS data show that approximately 6–8% of nursing home residents develop a new or worsening pressure injury during a care episode, a figure tracked publicly through Care Compare (CMS, Care Compare).

Acute hospital settings present elevated risk during surgical procedures exceeding 90 minutes, where repositioning cannot occur, and in intensive care units where hemodynamic instability limits tolerated position changes. Heel injuries are the second most common pressure injury site in hospitalized patients, following sacral wounds.

Home care and community settings produce injuries that often present at Stage 3 or 4 because they go undetected during gaps in caregiver presence. Older adults with functional decline requiring more support and those with reduced sensation—whether from peripheral neuropathy, spinal cord compromise, or sedating medications—are at highest risk in this setting.

Post-acute rehabilitation environments present risk during the transition phase when patients have sufficient mobility to be repositioned but insufficient endurance to maintain positions independently. A comprehensive approach to rehabilitation and skin surveillance is covered under geriatric rehabilitation.

Decision boundaries

Clinical decision-making for pressure injury prevention and management follows validated risk stratification tools and evidence-based treatment algorithms recognized by AHRQ and the NPIAP.

Risk screening thresholds: The Braden Scale, the dominant validated tool in U.S. practice, scores six subscales (sensory perception, moisture, activity, mobility, nutrition, friction/shear) on a range from 6 to 23. Scores of 18 or below indicate at-risk status; scores of 9 or below indicate very high risk, triggering the most intensive prevention protocols (Braden & Bergstrom, original validation study cited in AHRQ Pressure Ulcer Toolkit).

Prevention versus treatment decision point: Stage 1 injuries and DTPI without skin breakdown are managed through prevention intensification—repositioning every 2 hours on standard surfaces or every 4 hours on high-specification foam mattresses, moisture barrier application, and nutritional optimization. The presence of a Stage 2 or greater wound crosses into active wound treatment territory and requires a formal wound care plan under the skilled care definitions of 42 CFR Part 483 (CMS, Requirements of Participation for Long-Term Care Facilities, 42 CFR §483.25).

Debridement decisions: Unstageable injuries covered by stable, hard, dry eschar on heels—where eschar functions as a biological cover—are not debrided by default. NPIAP guidance distinguishes this from infected or fluctuant eschar, which requires urgent debridement to assess depth and control septic risk.

Nutrition thresholds: Protein intake below 1.2 grams per kilogram of body weight per day is associated with impaired wound healing in older adults. Formal nutritional screening, as described in the nutritional screening assessment framework, is a standard component of pressure injury management protocols. The NPIAP 2019 clinical practice guidelines recommend micronutrient assessment alongside macronutrient optimization for all patients with Stage 2 or greater injuries.

Wound assessment boundaries: Clinicians distinguish pressure injuries from three commonly confused conditions:

Condition Distinguishing feature
Pressure injury Bony prominence location; related to immobility or device
Moisture-associated skin damage (MASD) Diffuse, without distinct margins; not over bony prominence
Skin tear Traumatic separation of skin layers; typically on extremities in response to minor force
Venous or arterial ulcer Location on lower extremity; associated vascular findings; not position-dependent

The geriatrics home page situates pressure injury care within the broader context of multidimensional older adult health, where skin integrity intersects with mobility, cognition, nutrition, and care coordination across settings.

References

The law belongs to the people. Georgia v. Public.Resource.Org, 590 U.S. (2020)