MASD vs Pressure Injury: Moisture Skin Damage in Canadian LTC

Quick Summary: Moisture-associated skin damage (MASD) is an umbrella term for four types of skin injury caused by prolonged contact with urine, faeces, sweat or wound fluid, and it is frequently mislabelled as a pressure injury in Canadian long-term care. This article explains the four presentations, how to tell MASD from pressure damage, and the product choices that prevent it. It is written for LTC directors of care, clinical educators and procurement staff who set skin-care policy.

Ask a floor nurse what skin problem they see most in a Canadian long-term care home and the answer will rarely be a stage 2 pressure injury. It will be red, sore skin in the perineal area: raw creases behind the knees, angry patches around an ostomy, irritated skin at the edge of a draining wound. Clinicians group all of these under one name — moisture-associated skin damage, or MASD — and they treat it differently from the pressure injuries that dominate most skin-care training.

Getting the label right matters because the prevention is different. A pressure injury is managed with offloading and repositioning; MASD is managed by keeping moisture away from the skin and rebuilding the barrier. Confuse the two and a facility spends its energy on the wrong intervention while the redness spreads. This guide walks through the classification, the clinical differences and the absorbent-product strategy that keeps residents dry and skin intact.

What MASD actually is: one term, four presentations

Clinical guidance from Wounds Canada clinical guidance on MASD defines the term as inflammatory skin damage caused by prolonged exposure to moisture. Clinically it shows up in four patterns:

In long-term care, IAD is the dominant form because urinary and faecal incontinence are so common among residents. The mechanism is not complicated: healthy skin sits at a mildly acidic pH around 5, and prolonged contact with urine and stool pushes the surface toward neutral or alkaline. That shift activates digestive enzymes, irritates the stratum corneum and lets water-loving bacteria and fungi multiply. The result is erythema, burning, itching and, in severe cases, denuded skin that becomes a doorway for infection.

What surprises many care teams is how often the four forms overlap. A resident with faecal incontinence can develop IAD in the perineum, ITD in the groin folds and periwound MASD around a sacral wound at the same time. That is why the umbrella term matters: the treatment principle — remove the moisture, protect the skin — is identical across all four.

MASD vs pressure injury: a table every nurse should have

Pressure injuries (formerly pressure ulcers) and MASD are often confused because both produce redness in similar body areas and both are common in frail residents. But the mechanisms are different, and so are the interventions. A 2025 Wounds Canada chapter on MASD reports prevalence studies where MASD affected a meaningful share of admitted patients, with IAD and intertriginous dermatitis as the common subgroups.

The clinical rule of thumb used by wound specialists: if redness is confined to a bony prominence and does not shift when moisture is controlled, think pressure. If the pattern follows where moisture pools — perineum, skin folds, around a stoma — think MASD first. When both are present, treat both, because untreated IAD raises the risk of a full pressure injury forming on the damaged skin beneath.

Why MASD keeps showing up in Canadian LTC

Two forces drive MASD in long-term care. The first is population: residents are older, more frail and more likely to be incontinent than ever, and the proportion with cognitive impairment makes scheduled toileting harder to deliver. The second is supply economics: when budgets tighten, homes stretch absorbent products, use lower-capacity briefs or extend change intervals, and the skin pays the price.

A 2024 scoping review in the Journal of Tissue Viability examined the research on MASD prevention and care and concluded that structured skin-care protocols, appropriate absorbent products and staff education are the pillars of prevention. A 2023 nursing study on continence care knowledge reached a similar conclusion: when staff understand why skin damage happens, they change practice — and skin outcomes improve.

For Canadian facilities the message is practical. MASD is not an unavoidable fact of ageing; it is a preventable condition that responds to the right protocol and the right products. Homes that standardize perineal care see fewer skin breakdowns, fewer pressure injuries downstream, less discomfort for residents and fewer wound-care consults.

Cleansing and barrier care: the other two legs

Absorbent products contain moisture, but they do not clean the skin or repair the barrier, which is why containment alone never fixes MASD. The cleansing leg of prevention is gentle and frequent: use a pH-balanced cleanser or a pre-moistened perineal wipe, avoid harsh soap, and pat the skin dry rather than rubbing it. Friction during drying is itself a cause of damage, especially on fragile elderly skin. A 2011 clinical study of a dimethicone-impregnated perineal washcloth compared with water and pH-neutral soap found that the barrier-forming cloth reduced the development of incontinence-associated dermatitis — evidence that the cleansing product itself can do prevention work.

The barrier leg comes next. After cleansing and drying, apply a barrier product — zinc oxide paste, dimethicone cream or a dedicated skin protectant — to shield the skin from the next episode of moisture. Barrier products matter most for residents with frequent loose stools, where enzyme activity is highest and the window between episodes can be minutes rather than hours. In homes where the perineal care cart carries a cleanser, a protectant and an absorbent product in every room, the protocol is easier to follow than where staff must hunt for supplies at the far end of the hallway.

Building the MASD prevention toolkit

Prevention rests on three legs: cleansing, moisturizing and containing moisture. Absorbent products are the containing leg, and their specifications matter more than the brand on the box.

Absorbency and wicking

An adult brief is only as good as its ability to pull urine away from the skin and lock it in the core. A 3000 mL adult incontinence brief with a stay-dry surface layer and superabsorbent core keeps moisture off the skin between changes, which is the single biggest lever a care team controls. Lower-capacity products force more frequent changes, and in a busy home the schedule slips.

Layer protection where residents sit and lie

Underpads add a second line of defence on beds and chairs, especially for residents who are not on a scheduled change cycle. A 60 x 90 cm underpad with a five-layer construction and SAP core absorbs quickly and contains moisture laterally, protecting both the resident and the mattress. Facilities that pair briefs with underpads during repositioning turns, after meals and at night dramatically reduce the window of skin contact with moisture.

Reducing friction at the surface

Friction is a co-factor in MASD: wet skin dragged across sheets tears the stratum corneum. Smooth non-woven disposable bed sheets create a low-friction surface and eliminate the detergent residue that can irritate sensitive skin on reusable linens. They are a small line item that supports the whole skin-care plan.

Turning product choice into policy

Products do not prevent MASD; staff using the right products on a consistent schedule do. The facilities with the fewest skin injuries share a simple pattern: a written perineal care protocol, products matched to resident output (light, moderate, heavy), and an audit loop that checks skin at every change. When a home audits skin and finds reddened areas, the protocol says what to do next — cleanse gently, apply barrier, increase absorbency, document and recheck.

Procurement supports this by buying products that the floor can actually use. Case-quantity purchasing from a medical supply distributor such as CliniEco Medical keeps absorbent products in stock so the protocol never stalls on an empty shelf. CliniEco Medical is a licensed medical device establishment (MDEL #35334) and supplies briefs, underpads and disposable sheets across Canada, with bulk pricing for LTC homes that run continuous skin-care programs.

Documentation closes the loop. Every skin check should record what was seen, what was applied and when the next check is due; a simple body-map diagram in the resident's care record shows progress over weeks. When a reddened area does not respond to moisture control within 48 to 72 hours, escalate to the wound-care nurse or physician — persistent erythema can signal early pressure damage beneath the surface, and the earlier it is caught, the simpler the intervention. This is also the record that defends the home during inspections and family meetings, because it shows the facility did what the evidence says to do.

Related reading

• long-term care supplies
• open a wholesale account for institutional pricing

Frequently Asked Questions

What is the difference between MASD and a pressure injury?

MASD is caused by prolonged moisture exposure and typically appears as superficial, irregular redness that is not limited to bony areas. A pressure injury is caused by pressure or shear and usually forms over bony prominences with intact or broken skin.

What are the four types of moisture-associated skin damage?

The four clinical presentations are incontinence-associated dermatitis (IAD), intertriginous dermatitis (ITD), peristomal MASD and periwound MASD.

How common is incontinence-associated dermatitis in long-term care?

IAD is one of the most common skin conditions in nursing homes. Wounds Canada and international prevalence studies report figures high enough that every Canadian LTC director of care should assume IAD is present on their floor this week.

What supplies prevent moisture-associated skin damage in LTC?

High-absorbency incontinence briefs, SAP underpads, gentle cleansing wipes, barrier products and a consistent change schedule are the core prevention toolkit. CliniEco Medical supplies the absorbent and skin-protection lines in bulk.

How often should an incontinent resident's brief be changed to prevent MASD?

Change frequency depends on output, but the clinical rule is to check and change promptly after soiling and to use products with enough absorbency to keep moisture away from the skin between changes.

Can CliniEco Medical supply incontinence products for Canadian LTC homes?

Yes. CliniEco Medical, a licensed medical device establishment (MDEL #35334), supplies 3000 mL adult briefs, SAP underpads and disposable bed sheets in case quantities to LTC homes across Canada.

Is MASD the same as a skin tear?

No. A skin tear is a traumatic wound caused by friction or shearing forces, while MASD is inflammatory damage from moisture. They share risk factors and often occur together, but prevention differs.

What pH are healthy skin and urine, and why does that matter?

Healthy skin is mildly acidic around pH 5, while urine and faeces shift the surface toward neutral or alkaline, which activates digestive enzymes and weakens the skin barrier. Keeping moisture away preserves the acid mantle.

Related reading: explore our long-term care and home care resources.

start with our underpad buying guide for absorbency, sizing and cost.

References

1. Wounds Canada: Prevention and Management of Moisture-Associated Skin Damage
2. Wounds Canada: MASD Chapter (2025)
3. Journal of Tissue Viability: Prevention and care for moisture-associated skin damage — a scoping review (2024)
4. PubMed 38906753: Prevention and care for MASD scoping review
5. PubMed 37596079: Improving knowledge of continence care to prevent skin damage (2023)
6. PubMed 30389338: Minimum Data Set for Incontinence-Associated Dermatitis (2018)
7. PubMed 21952346: Perineal washcloth with dimethicone vs water and pH-neutral soap (2011)
8. Antimicrobial Resistance & Infection Control
9. CMAJ — Canadian Medical Association Journal
10. WHO Hand Hygiene in Health Care
11. Health Canada: Medical Devices
12. Canadian Centre for Occupational Health and Safety
13. Public Health Ontario
14. CDC Isolation Precautions Guidelines
15. Woundsource: MASD and IAD — Etiology, Diagnosis and Management