Medical-Surgical Nursing · Nursing Care of the Critically Ill Patient
Integumentary Concerns
On this page 9 sections
In 30 seconds
The skin is the body's largest organ and first line of defense: it keeps infection out, keeps fluid in, regulates temperature, provides sensation, and is the most visible window into circulation. In critical illness the skin is assaulted from every direction — immobility presses it against beds, moisture softens and breaks it down, devices and adhesives irritate it, and reduced perfusion leaves it cool, pale, or mottled.
This topic covers the major skin concerns in critical illness — pressure injuries, moisture-associated skin damage, skin tears, medical adhesive-related skin injury, device-related wounds, and the skin as a perfusion monitor — plus the nursing habits that prevent and detect them. The organizing principle: most skin damage in the ICU is preventable, and prevention is a nursing-driven, team-supported activity. A red spot noticed today is a story that began days ago; the nurse who checks, protects, and documents interrupts that story.
Why this matters
- The skin is a barrier and a monitor. Broken skin is an infection entry point, and skin findings (mottling, pallor, slow capillary refill) are early visible signs of poor perfusion.
- Pressure injuries are a quality and safety issue. They cause pain, prolong stays, raise infection risk, and are tracked as quality indicators; most are preventable with good assessment and care.
- ICU patients are at extreme risk. Immobility, sedation, moisture, devices, malnutrition, and reduced perfusion stack the odds against the skin.
The college version
Core Concepts
What the skin does — and what happens when it fails
The skin's layers work together as a barrier against microbes and fluid loss, a temperature regulator, and a sensory surface. When the barrier breaks, microbes have a door in and fluid leaks out. In the ICU the skin also functions as a vital-sign display: color, temperature, moisture, and capillary refill reflect circulation.
Pressure injuries
A Pressure injury Skin/tissue damage, usually over bone, from pressure (often with shear and friction) Full entry → is localized damage to skin and underlying tissue, usually over a bony prominence, caused by pressure — often combined with shear and friction — squeezing tissue between bone and a surface such as a mattress. Heels, sacrum, hips, elbows, and ears are common sites.
Staging describes how deep the damage goes. Commonly used categories (systems evolve; institutional education governs practice):
- Category/stage 1: intact skin with non-blanchable redness — the earliest visible signal.
- Category/stage 2: partial-thickness skin loss, often a shallow open wound.
- Category/stage 3: full-thickness skin loss into the tissue beneath.
- Category/stage 4: full-thickness loss with exposed bone, muscle, or tendon.
- Unstageable: the base is covered by slough or eschar, so depth cannot be determined.
- Deep tissue injury: intact skin with a purple or maroon area, indicating damage below the surface.
Risk-assessment tools (such as the Braden scale) score risk factors — sensory perception, moisture, activity, mobility, nutrition, and friction/shear — to identify who needs intensified prevention. The core prevention triad is risk assessment, repositioning, and pressure redistribution (specialized surfaces, heel offloading), with skin inspection woven throughout. Specific schedules and products follow institutional protocol.
Moisture-associated skin damage (MASD)
Prolonged contact with moisture — urine, stool, sweat, wound drainage — softens the skin and causes irritation and breakdown. Incontinence-associated dermatitis is the common form. MASD is not a pressure injury, though they often coexist (moist, irritated skin is more vulnerable to pressure damage). Prevention: keep skin clean and dry, use barriers and absorbent products per formulary, and address the moisture source when possible.
Skin tears and medical adhesive-related skin injury
Skin tears are wounds from shear or friction separating the skin layers — common in older adults and people on steroids, whose skin is fragile. Prevention: gentle handling, padding, protective coverings. Medical adhesive-related skin injury (MARSI) is damage from tape, dressings, or electrodes pulling on fragile skin, more common with repeated re-taping. Prevention: least aggressive adhesive for the job, correct application/removal technique, rotating sites.
Device-related wounds
Every tube, line, strap, and restraint presses or rubs on skin: endotracheal tube holders, oxygen tubing, nasogastric tubes, catheters, pulse-oximetry probes, restraint cuffs. The nurse checks skin under and around every device on a regular schedule per policy — padding, repositioning, and vigilance prevent most device injuries.
The skin as a perfusion monitor
Cool, pale, or mottled extremities; delayed capillary refill; dusky or blotchy skin can signal reduced cardiac output or shock. Jaundice points to liver problems; cyanosis to oxygenation or circulation problems; petechiae or unusual rashes to infection or bleeding disorders. Skin findings are clues interpreted with vital signs and labs — never diagnoses alone.
Wound assessment and infection control
For any wound, assess location, size, depth, tissue type in the base, exudate, wound edges, and surrounding skin, documenting per facility standards. Broken skin is an infection risk; dressing changes follow sterile or clean technique per policy. Skin care is intimate care: explain what you are doing, keep the person covered where possible, and manage pain during turning and dressing changes.
Common Confusions
| Do not confuse | With | Difference |
|---|---|---|
| Pressure injury | Moisture-associated skin damage | Pressure injury = pressure/shear over bone; MASD = moisture damage. They coexist but need different prevention |
| Shear | Friction | Shear = layers sliding against each other; friction = surface rubbing skin — different mechanisms |
Eli explains
The same idea, in plain words
Explain it like I’m 10
The skin is the body's raincoat — it keeps germs out and water in. When a person lies still in a hospital bed for a long time, the skin can get hurt where it presses against the bed, like a sock rubbing a blister on your foot. Nurses turn people regularly, keep skin clean and dry, and check red spots early — a small red spot caught in time can be stopped before it becomes a sore.
Worked example
A person is on bed rest after a long ICU stay, too weak to turn themselves. During morning care, the nurse notices a red area over the sacrum, presses briefly, and releases: the redness stays — it does not blanch. This is a stage 1 pressure-injury signal on intact skin. The nurse documents it, updates the risk assessment, and starts the prevention bundle per policy: a repositioning schedule, a pressure-reducing surface, heel offloading, keeping the area clean and dry, and a nutrition review with the team. The nurse also checks under the catheter tubing and the endotracheal tube holder. The reasoning: non-blanchable redness means blood flow to that spot is already compromised — this is the moment the story can still be turned around; without the check, the redness would progress under the sheets. The nurse does not independently stage outside policy, select specialty products off-protocol, or discharge the person — those follow policy and team process.
Key takeaways
- Pressure injuries are largely preventable; risk assessment + repositioning + pressure redistribution is the core triad (schedules and products per policy).
- Non-blanchable redness on intact skin is the earliest visible pressure-injury signal — press, release, watch whether color returns.
- Not every red or wet area is a pressure injury: consider MASD, skin tears, adhesive injuries, device wounds.
- Skin findings are a window into perfusion: mottling, coolness, and slow capillary refill can reflect shock — report with vital signs.
- Skin care is intimate care: protect the person's dignity and comfort; manage pain during turning and dressing changes.
- Scope note: staging, product selection, and wound procedures follow facility policy and state scope; wound-care specialists may be consulted for complex wounds.
Check yourself
6 review questions from the chapter. Try each one, then open the answer.
What is the earliest visible signal of a pressure injury, and how do you check for it?
Show answer
Non-blanchable redness on intact skin (stage 1). Press briefly and release; if redness persists, it does not blanch — document and escalate per policy.
Why is moisture-associated skin damage not a pressure injury, and why does the distinction matter?
Show answer
MASD comes from prolonged moisture; pressure injury comes from pressure/shear over bone. They need different prevention (moisture control vs. offloading), though they can coexist.
Name three measures that make up the core pressure-injury prevention triad.
Show answer
Risk assessment (e.g., Braden scale), regular repositioning per schedule, and pressure redistribution (specialized surfaces, heel offloading) — plus skin inspection throughout.
How can the skin act as a perfusion monitor in a critically ill patient?
Show answer
Color (pale, mottled, cyanotic), temperature, moisture, and capillary refill reflect circulation; slow refill, coolness, or mottling can signal reduced perfusion — report with vital signs.
What are two ways medical devices contribute to skin injury, and how do nurses prevent them?
Show answer
Devices press (tube holders, restraint cuffs) and rub (tape, electrodes, tubing). Prevention: check skin under/around devices, pad and reposition, use proper adhesive technique.
Why are pressure injuries tracked as quality indicators?
Show answer
Pressure injuries are largely preventable, cause pain and infection, prolong stays, and reflect care quality — so they are measured and reported.
Study tools & related lessonsKey vocabulary · Related
Key vocabulary
- Pressure injury
- Skin/tissue damage, usually over bone, from pressure (often with shear and friction)
- Non-blanchable erythema
- Redness that does not turn white when pressed
- Moisture-associated skin damage (MASD)
- Breakdown from prolonged moisture (urine, stool, sweat, drainage)
- Skin tear
- Wound from shear/friction separating skin layers
Sources & references
This lesson was adapted from the open educational references above; their licenses and attributions are preserved. See Copyright & Licensing.
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