Fundamentals of Nursing · Skin Integrity
Skin Integrity
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Skin integrity Skin is intact and functioning as a barrier Full entry → means the skin is intact — unbroken — and functioning as a barrier. A person with intact skin integrity has no breaks, tears, ulcers, or rashes compromising the barrier. Impaired skin integrity means the barrier has been breached or weakened — by a scrape, a surgical incision, a Pressure injury Localized skin/tissue damage from pressure ± shear, usually over bone Full entry →, a burn, or a skin condition.
This topic sits at the center of Chapter 24. Structures and Function of the Skin gives you the anatomy; this topic asks what keeps that anatomy healthy, what breaks it, and how to find the breaks early. Wound Classification and Wound Healing take over once a wound exists. But the best wound care is prevention, and prevention starts with understanding risk.
The single most important concept is the pressure injury: damage to skin and underlying tissue caused by pressure, usually over a bony prominence. Pressure injuries are common, painful, expensive, and largely preventable — a national patient-safety priority and a favorite exam topic. Nurses assess risk, inspect skin, reposition patients, manage moisture, and document findings, guided by standardized risk-assessment tools and staging systems.
Why this matters
Impaired skin integrity is not a cosmetic problem; it is a doorway to infection, pain, prolonged stays, and even death. A pressure injury can turn a routine hospitalization into months of suffering: the wound is painful, it can become infected (including deep bone and bloodstream infection), it delays rehabilitation, and it is enormously costly. Health systems track pressure injuries as a quality indicator — a hospital's pressure-injury rate measures how safe its care is, and in some jurisdictions facility-acquired pressure injuries affect reimbursement.
For the patient, the stakes are dignity and comfort: loss of the ability to sit in a chair, confinement to special surfaces, repeated dressing changes, significant pain. Many pressure injuries are preventable with attentive nursing care — regular repositioning, skin inspection, moisture management, nutrition support, Offloading Removing pressure from a specific area (e.g., floating heels) Full entry →. Few topics have a bigger gap between what good nursing prevents and what happens when it doesn't.
The college version
Core Concepts
How a pressure injury forms
A pressure injury is localized damage to skin and/or underlying tissue, usually over a bony prominence, caused by pressure, or pressure combined with Shear Skin held in place while deeper tissue shifts, kinking vessels Full entry →. When pressure on an area exceeds the pressure inside the tiny blood vessels feeding the tissue, those vessels collapse and blood flow stops. Deprived of oxygen, the tissue dies. Damage often begins deep, at the bone, and spreads outward — which is why a tiny surface blister can sit on top of extensive deep damage.
Pressure injuries have a signature distribution — wherever bone is close to the surface and weight rests on it: sacrum and coccyx, heels, hips (trochanters), elbows, shoulders, back of the head, ears. The person's position determines which sites are at risk.
Risk factors: what makes skin vulnerable
Risk is a combination of pressure dose (how much pressure, for how long) and tissue tolerance (how well tissue resists it):
- Immobility and inactivity — the single biggest risk factor; pressure stays on the same spots for hours.
- Friction and shear — friction scrapes the epidermis; shear (skin held in place while deeper tissue shifts, as when a person slides down in bed) tears and kinks deep vessels.
- Moisture — sweat, urine, stool, or drainage softens and weakens the epidermis (Maceration Skin softened and weakened by prolonged moisture Full entry →). Incontinence is a major contributor.
- Poor nutrition and hydration — the body needs protein, calories, vitamins, and fluids to maintain and repair skin.
- Reduced sensation — no "shift position" signal fires (see Considerations for Care of Neuromuscular Impairment).
- Reduced perfusion — conditions impairing blood flow or oxygen delivery (vascular disease, heart failure, anemia, hypotension) starve the skin.
- Age — thinner, drier, less padded, slower-healing skin.
- Medical devices — tubing, masks, splints, casts press on skin too; device-related injuries are a recognized, preventable category.
Risk assessment: finding the vulnerable patient early
Nurses predict who is likely to develop a wound rather than waiting for one. Most facilities use a standardized risk-assessment scale (the Braden Scale Standardized risk tool with subscales; lower score = higher risk Full entry → is the most widely used in the US; Norton and Waterlow are others). These tools score subscales such as sensory perception, moisture, activity, mobility, nutrition, and friction/shear, producing a total score where lower scores indicate higher risk. Risk is assessed on admission and reassessed regularly and whenever the condition changes.
A scale is a screening tool, not a substitute for judgment: two patients with the same score can need different plans, and a low-risk patient can still develop a wound if their condition changes. The score thresholds and triggered interventions are institutional — check your facility's policy rather than memorizing a universal cutoff.
Staging: describing how deep the damage goes
When a pressure injury exists, stage describes the depth of tissue involvement (educational overview; verify staging against current National Pressure Injury Advisory Panel / NPUAP guidelines, which are updated over time):
- Stage 1 — Intact skin with localized non-blanchable redness (does not turn pale when pressed). On darker skin it may appear as a patch that is darker, warmer, cooler, or firmer than surrounding skin. The skin is not open, but damage is beginning.
- Stage 2 — Partial-thickness loss: shallow, open, pink/red, moist wound, or an intact/ruptured blister. No deeper tissue exposed.
- Stage 3 — Full-thickness loss into the subcutaneous layer; fat may be visible; muscle, tendon, and bone are not exposed.
- Stage 4 — Full-thickness loss with exposed muscle, tendon, or bone; possible Undermining Tissue eroding under intact skin at the wound edge Full entry → (erosion under intact skin at the edge).
- Unstageable — Full-thickness loss covered by slough (yellow, stringy dead tissue) or eschar (black, leathery dead tissue), so depth cannot be seen until cleaned/debrided.
- Deep tissue injury (DTI) — Intact skin with persistent deep red, maroon, or purple discoloration or a blood-filled blister — damage below the surface that may rapidly evolve into a full-thickness wound.
Staging describes depth at the time of assessment, not a static diagnosis; wounds evolve as they heal (healing wounds are described with special terminology in many systems — verify current guidance). Staging is performed by nurses prepared and credentialed per institutional policy.
Prevention: the core nursing interventions
The toolkit is well established (specific products and schedules vary by facility policy):
- Repositioning on a schedule — the traditional standard is every 2 hours for many bedbound patients, but the interval is individualized by risk, skin condition, tolerance, and surface. Use 30-degree side-lying where appropriate; avoid direct trochanter pressure; offload heels (float them) so no pressure rests on them.
- Protect from friction and shear — lift sheets, lift (don't drag), keep the head of bed as low as clinically appropriate, protective dressings per policy.
- Manage moisture — keep skin clean and dry; prompt incontinence care; barrier products per policy.
- Support nutrition and hydration — adequate calories, protein, and fluids per the plan of care and dietitian input (never invent supplements or amounts).
- Pressure-redistribution surfaces — specialized mattresses, overlays, and cushions spread pressure over a larger area.
- Inspect skin daily — every bony prominence, including under medical devices; compare with baseline; document.
- Educate patient and family — what to look for, why repositioning matters, how to protect skin.
Documentation and communication
Accurate documentation is a legal and clinical necessity: location, size (L × W × D), stage (if a pressure injury), color, drainage, odor, surrounding skin, and prevention measures in place. Worsening or new findings are reported to the provider and team. The nursing axiom applies: if it isn't documented, it didn't happen — and careful documentation protects both patient and nurse.
Common Confusions
| Do Not Confuse | With | Difference |
|---|---|---|
| Pressure injury | A surface "sore" | Damage often starts deep at the bone and spreads outward — surfaces deceive |
| Blanching redness | Non-blanching redness | Blanching = blood flow works (reversible); non-blanching = tissue already damaged (Stage 1) |
| Stage 2 | A "mild" wound | Any open wound is a barrier break with infection risk; staging describes depth |
| Staging a healing wound the same way | Using healing terminology | Many systems use special healing descriptors — verify current guidance |
| Moisture (maceration) | Infection | Wet, white, softened skin is often moisture damage, not pus — but moisture invites infection, so distinguish carefully |
| The Braden Scale "deciding" care | The scale supporting judgment | The scale screens; the nurse interprets; policy sets interventions |
| Only bedridden patients get injuries | Anyone at risk | Chair-bound patients, device pressure, reduced sensation — all at risk |
| Redness visible = problem; no redness = fine | Different cues on darker skin | Check warmth, firmness, color change vs. baseline; ask about discomfort |
Eli explains
The same idea, in plain words
Explain it like I’m 10
Imagine lying with your arm under you — after a while it feels numb and tingly because blood can't get through. That's what happens when someone stays in one position too long: blood stops flowing to that spot. If nobody moves them, the skin gets hurt underneath, like a banana getting a bruise under its peel. Nurses check the skin, turn people on a schedule, keep skin dry, and give bony spots like heels and tailbones a break — so the bruise never happens.
Worked example
Mr. Rivera, 71, is on bedrest after surgery. His Braden score places him at elevated risk per facility policy, so his plan includes repositioning every 2 hours, a redistribution mattress, and heel offloading. At 2 a.m. the nurse finds him wedged down in bed — sacrum bearing weight, heels pressed into the mattress — and the linens under him damp from incontinence.
She acts step by step:
- Inspect. His sacrum shows a small area of redness that does not blanch when pressed — a Stage 1 pressure injury by current staging criteria.
- Act. She cleans and dries the area, applies the barrier product per policy, repositions him into 30-degree side-lying with pillows, floats his heels, changes the linens, and reminds the team of his 2-hour schedule.
- Document. She charts the finding (location, size, non-blanchable, stage per current guidelines), the interventions, and the plan; flags it in shift report so the day nurse reassesses and the provider is notified per policy.
- Teach. In the morning she shows Mr. Rivera how to use the trapeze to shift his own weight, restoring independence.
Because the nurse caught the Stage 1 injury at the earliest, fully reversible point and corrected position and moisture, the redness resolves in two days and no open wound develops. Without the skin check, the same scenario could become a Stage 3 wound weeks later. Early detection is prevention.
Key takeaways
- Pressure injury = tissue damage from pressure ± shear, usually over bone; damage often starts deep and works outward.
- Immobility is the #1 risk factor; risk = pressure dose × tissue tolerance.
- Risk factors: immobility, friction/shear, moisture, poor nutrition, reduced sensation, poor perfusion, older age, medical devices.
- Braden Scale (and similar tools) screen risk — lower score = higher risk; thresholds and interventions are institutional; never replace judgment.
- Stage 1 = intact skin, non-blanchable redness — earliest warning; on darker skin look for darker/warmer/firmer patches vs. baseline.
- Stage 2 = shallow open wound or blister; Stage 3 = fat visible; Stage 4 = muscle/tendon/bone exposed; Unstageable = slough/eschar covers base; DTI = purple/maroon under intact skin.
- Prevention is the job: scheduled repositioning (interval individualized), 30-degree positioning, heel offloading, friction/shear avoidance, moisture management, nutrition support, redistribution surfaces, daily skin inspection.
- Incontinence-related moisture is a leading contributor — prompt gentle cleansing and barrier protection.
- Document everything — location, size, stage, drainage, prevention measures; report changes.
- Educational overview only: staging and risk-tool thresholds are updated by guideline bodies and set by institutional policy — verify current versions.
Check yourself
6 review questions from the chapter. Try each one, then open the answer.
What is the difference between blanching and non-blanching redness, and why does it matter?
Show answer
Blanching redness turns pale when pressed and refills — blood flow still reaches the area; usually reversible. Non-blanching redness stays red — blood flow has already failed there; the hallmark of Stage 1, requiring immediate intervention.
List four pressure-injury risk factors and the mechanism behind each.
Show answer
Any four with mechanisms: immobility (pressure stays on one spot, vessels collapse); friction/shear (epidermis scraped; deep vessels kinked); moisture (maceration softens skin); poor nutrition (no materials to maintain/repair tissue); reduced sensation (no pain signal to move); poor perfusion (skin starved of oxygen); older age (thinner, drier, less padded skin); medical devices (pressure from tubing/splints).
Why can a pressure injury look small on the surface but be much larger underneath?
Show answer
Because pressure damage usually begins deep, at the bone, and spreads outward. The surface may show only a small blister or discoloration while extensive tissue beneath is already dead — why DTI can rapidly "reveal" a much larger full-thickness wound.
A patient with dark skin has a suspicious sacral area. What assessment cues do you use besides "redness"?
Show answer
Look for a persistent patch darker, warmer, cooler, or firmer than surrounding skin versus baseline; check for reported pain or tingling; compare carefully with the patient's normal color; non-blanchability may show as color change requiring careful comparison.
What is the nurse's first response when a Stage 1 pressure injury is found during a routine skin check?
Show answer
Initiate the prevention/treatment plan per policy: offload the area, manage moisture, protect the skin, document (location, size, non-blanchable redness, stage per current guidelines), notify the provider per policy, and escalate. Stage 1 is reversible — act fast.
Why are facility-acquired pressure injuries tracked as a quality indicator, and what does that mean for practice?
Show answer
Because pressure injuries are common, costly, painful, and largely preventable, so their rate reflects safety and quality of care. For nurses: assess risk on admission and regularly, implement prevention consistently, document carefully, and treat every skin check as a chance to prevent harm.
Study tools & related lessonsKey vocabulary · Related
Key vocabulary
- Skin integrity
- Skin is intact and functioning as a barrier
- Pressure injury
- Localized skin/tissue damage from pressure ± shear, usually over bone
- Non-blanchable erythema
- Redness that doesn't turn pale when pressed
- Shear
- Skin held in place while deeper tissue shifts, kinking vessels
- Maceration
- Skin softened and weakened by prolonged moisture
- Offloading
- Removing pressure from a specific area (e.g., floating heels)
- Braden Scale
- Standardized risk tool with subscales; lower score = higher risk
- Slough / eschar
- Yellow stringy / black leathery dead tissue
- Undermining
- Tissue eroding under intact skin at the wound edge
Sources & references
This lesson was adapted from the open educational references above; their licenses and attributions are preserved. See Copyright & Licensing.
Educational content only. It is not medical, legal or professional advice. Found an error? Tell us.