5.3 Mechanical Injury, Medical Adhesive-Related Skin Injury (MARSI) & Folliculitis
Key Takeaways
- Medical Adhesive-Related Skin Injury (MARSI) occurs when the adhesive peel force between the skin barrier and stratum corneum exceeds the internal cohesive strength between epidermal cells or between the epidermis and dermis.
- Ostomy MARSI manifests as epidermal skin stripping, tension blisters, or skin tears, primarily triggered by frequent unscheduled pouch changes, peel angles exceeding 90 degrees, failure to use silicone adhesive removers, and overtightened convex belts.
- The standard atraumatic 'push-pull' pouch removal technique requires gently pushing the abdominal skin away from the adhesive wafer while peeling the barrier downward parallel to the body wall at a low angle ($0\text{ to }30^\circ$).
- Peristomal folliculitis is an inflammatory bacterial infection (most commonly *Staphylococcus aureus*) of hair follicles provoked by mechanical hair avulsion during adhesive removal or micro-trauma from dry razor shaving.
- Peristomal folliculitis management requires trimming hair exclusively with single-use electric clippers or scissors in the direction of hair growth (never using a dry razor), washing with chlorhexidine or antibacterial soap, applying topical mupirocin or antibacterial powder via crusting, and avoiding greasy ointments that destroy wafer adhesion.
Mechanical Injury, Medical Adhesive-Related Skin Injury (MARSI) & Folliculitis
Quick Summary: Mechanical peristomal injuries occur when external physical forces—adhesive peel tension, shear stress, friction, or hair avulsion—overwhelm the structural integrity of the peristomal epidermis. Medical Adhesive-Related Skin Injury (MARSI) presents as epidermal stripping, tension blisters, or full-thickness skin tears, frequently caused by frequent pouch removals and improper removal mechanics ($> 90^\circ$ peel angles). Peristomal Folliculitis is a localized Staphylococcus aureus infection of hair follicles triggered by traumatic hair stripping. Management focuses on the "push-pull" removal technique, silicone-based adhesive removers, electric hair trimming in the direction of growth, and non-greasy topical treatments.
Maintaining the balance between secure pouch adhesion and cutaneous preservation is a core challenge in ostomy care. When adhesive removal forces exceed the mechanical tensile strength of epidermal intercellular junctions, skin breakdown is immediate and progressive.
Biomechanics of MARSI in Ostomy Care
Medical Adhesive-Related Skin Injury (MARSI) is defined as an event in which erythema and/or other manifestations of cutaneous damage (including epidermal stripping, blisters, tears, or erosion) persist for 30 minutes or more after the removal of an adhesive device.
ADHESIVE PEEL DYNAMICS & MARSI
┌────────────────────────────────────────────────────────────────────────┐
│ ATRAUMATIC PULL (0° to 30° Angle) -> SAFE │
│ Wafer ---> ═════════════════════ (Peel parallel to skin surface) │
│ Skin <--- [Push Skin Inward] (Forces distributed across plane) │
├────────────────────────────────────────────────────────────────────────┤
│ TRAUMATIC PULL (90° to 180° Angle) -> MARSI INDUCTION │
│ Wafer ↑ (Pulled straight out or yanked backward) │
│ │ (High vertical tensile stress on Dermal-Epidermal Junction) │
│ Skin ═══╤══════════════════════ │
│ └-> Epidermal Stripping / Tension Blister / Skin Tear │
└────────────────────────────────────────────────────────────────────────┘
Clinical Manifestations of Ostomy MARSI
- Epidermal Stripping: Removal of one or more layers of the stratum corneum alongside the adhesive wafer. Manifests as shallow, irregular, glistening pink-to-red patches that burn upon exposure to air and mirror the outer tape collar or wafer border.
- Tension Blisters: Separation of the epidermis from the dermis resulting in clear fluid-filled vesicles or bullae. Typically develops at the rigid outer perimeter of convex wafers or beneath overtightened ostomy belts where shear stress is concentrated.
- Skin Tears: Traumatic separation of the epidermis from the dermis (partial-thickness) or both layers from underlying subcutaneous tissue (full-thickness), occurring predominantly in geriatric patients, premature infants, or individuals on chronic corticosteroid therapy with dermal elastosis and epidermal atrophy.
Primary Etiological Drivers of Ostomy MARSI
- Frequent Pouch Changes: Changing the appliance more frequently than every 48 to 72 hours (e.g., daily or multiple times daily) strips corneocytes faster than epidermal regeneration (which requires 14 to 28 days for complete turnover).
- High Peel Angles & Rapid Removal Velocity: Ripping the wafer off at an angle $> 90^\circ$ or pulling rapidly concentrates high vertical tensile forces on the dermal-epidermal junction, inducing mechanical cleavage.
- Failure to Use Adhesive Removers: Pulling dry adhesive off skin without solvent assistance forcefully detaches corneocytes bound to the acrylic or hydrocolloid matrix.
- Convexity Edge-Shear: Rigid convex inserts pressing into a dynamic abdomen create localized shear stress at the convex transition zone.
Prevention & Management of Ostomy MARSI
Preventing MARSI requires optimizing removal biomechanics, selecting appropriate adhesive technologies, and establishing a protective sacrificial polymer barrier.
+---------------------------------------------------------------------------------------------------+
| MARSI PREVENTION & MANAGEMENT PROTOCOL |
+---------------------------------------------------------------------------------------------------+
| Clinical Domain | Preventive Technique | Corrective Nursing Action |
+------------------------+-------------------------------------------+------------------------------+
| Pouch Removal | **"Push-Pull" Technique:** Support skin | Stop mechanical ripping; |
| Technique | with one finger; push skin away while | instruct patient/caregiver |
| | peeling wafer parallel to body ($0–30°$). | on low-angle peel mechanics. |
+------------------------+-------------------------------------------+------------------------------+
| Adhesive Release | **Silicone-Based Adhesive Removers:** | Spray or wipe under the |
| Agents | Non-sting, non-oily silicone fluid | leading edge as the barrier |
| | disrupts adhesive polymers cleanly. | is peeled; no lipid residue. |
+------------------------+-------------------------------------------+------------------------------+
| Barrier Interface | **Full Hydrocolloid Wafers:** Gentler, | Discontinue aggressive zinc |
| Selection | moisture-absorbing hydrocolloid borders | oxide or acrylic medical |
| | instead of rigid microporous tape borders.| tapes on fragile skin. |
+------------------------+-------------------------------------------+------------------------------+
| Cutaneous Protection | **Non-Alcohol Barrier Film (Cavilon):** | Apply 1 coat; allow to dry |
| | Creates a sacrificial silicone/acrylate | completely before applying |
| | polymer shield on the stratum corneum. | new skin barrier wafer. |
+------------------------+-------------------------------------------+------------------------------+
| Tension Blister | Avoid overtightening ostomy belts; | Decompress tense blisters |
| Care | ensure 2-finger slack; select flexible | aseptically; leave roof on; |
| | soft convex barriers over rigid inserts. | crust with hydrocolloid. |
+------------------------+-------------------------------------------+------------------------------+
Important: Silicone vs. Oil-Based Adhesive Removers: Always verify that adhesive removers are 100% silicone-based and non-sting. Oil-, petroleum-, or solvent-based removers leave a greasy lipid film that permanently prevents subsequent wafer adhesion, precipitating early leakage and worsening chemical damage.
Peristomal Folliculitis: Pathophysiology & Clinical Presentation
Peristomal Folliculitis is an inflammatory or infectious condition of the hair follicles within the 4-inch peristomal zone, representing up to 20% of mechanical peristomal complications in hirsute individuals.
Pathogenesis
- Mechanical Avulsion Trauma: When hair-bearing peristomal skin is covered with an adhesive wafer, the hair shafts become embedded in the adhesive. When the wafer is removed, hairs are forcefully avulsed from their follicular canals, tearing the follicular epithelium and creating open, inflamed micro-wounds.
- Dry Shaving & Micro-Lacerations: Shaving peristomal skin with a manual multi-blade safety razor without lubrication creates microscopic epidermal nicks, cuts hair shafts below the skin surface (predisposing to ingrown hairs / pseudofolliculitis), and inoculates cutaneous flora into open follicles.
- Bacterial Colonization: Staphylococcus aureus (and less commonly Pseudomonas aeruginosa or coagulase-negative staphylococci) proliferates in the warm, occluded sub-barrier environment, invading the damaged follicular infundibulum.
Clinical Appearance
- Multiple discrete, pinpoint erythematous papules and pustules centered precisely on hair follicles.
- Distributed across hair-bearing areas in Zone 2 of the peristomal perimeter, sparing non-hair-bearing areas.
- Associated with moderate pruritus, localized tenderness, and mild burning upon adhesive contact.
[FOLLICULITIS PATTERN] [CANDIDIASIS PATTERN]
┌─────────────────────────┐ ┌─────────────────────────┐
│ • • • • • │ │ ░░░░░░░░░░░░░░░ │
│ • • • • │ │ ░░░█████████░░░░ • │
│ • ┌─────────┐ • │ │ • ░██ STOMA ██░ • • │
│ │ STOMA │ │ │ ░░█████████░░░░ • │
│ • └─────────┘ • │ │ • ░░░░░░░░░░░░ • • │
│ • • • • │ │ • • • • │
│ (Discrete Pustules on │ │ (Confluent Red Plaque + │
│ Hair Follicles ONLY) │ │ Peripheral Satellites) │
└─────────────────────────┘ └─────────────────────────┘
Clinical Management Protocol for Peristomal Folliculitis
Successful resolution requires eradicating the bacterial load while eliminating mechanical hair avulsion during subsequent pouch changes.
1. The Peristomal Hair Removal Protocol
- Never Dry Shave: Dry razor shaving is strictly contraindicated.
- Approved Hair Removal Instruments: Use a single-use surgical electric clipper (with disposable head) or fine curved scissors with rounded tips held parallel to the skin surface.
- Direction of Hair Clipping: Always clip or trim hair in the direction of natural hair growth (never against the grain), leaving 0.5 to 1.0 mm of stubble to prevent ingrown hairs.
- Avoid Depilatory Creams: Chemical depilatories contain strong alkaline chemicals (calcium thioglycolate) that cause severe chemical burns and blistering when trapped beneath an occlusive ostomy wafer.
2. Antiseptic Cleansing
- Wash the peristomal area with an antibacterial cleanser or 2% to 4% chlorhexidine gluconate (CHG) wash.
- Thoroughly rinse the area with copious warm tap water and dry completely. Any residual soap film will interfere with wafer adhesion.
3. Topical & Systemic Antimicrobial Therapy
+---------------------------------------------------------------------------------------------------+
| FOLLICULITIS PHARMACOTHERAPY & ADHESION PRESERVATION |
+---------------------------------------------------------------------------------------------------+
| Severity Level | Clinical Findings | Approved Medical Regimen |
+------------------------+---------------------------+-----------------------------------------------+
| Mild Folliculitis | < 10 discrete papules; | • Clip hair in direction of growth. |
| | no fluctuant pustules | • Wash with antibacterial / CHG cleanser. |
| | | • Dust with antibacterial / hydrocolloid |
| | | stoma powder + non-alcohol barrier seal. |
+------------------------+---------------------------+-----------------------------------------------+
| Moderate Folliculitis | 10–30 pustules; | • Deroof pustules gently with sterile gauze. |
| | localized erythema | • Apply **Topical Mupirocin 2% (Bactroban)** |
| | | ointment *extremely sparingly* or cream; |
| | | blot dry, crust with barrier film seal. |
+------------------------+---------------------------+-----------------------------------------------+
| Severe / Refractory | Confluent furunculosis, | • Systemic oral anti-staphylococcal therapy: |
| Folliculitis | cellulitis, systemic pain | - **Cephalexin** 500 mg PO QID x 7–10 days |
| | | - **Dicloxacillin** 500 mg PO QID x 7–10 days|
| | | - **Trimethoprim-Sulfamethoxazole** or |
| | | **Doxycycline** if MRSA is suspected. |
+------------------------+---------------------------+-----------------------------------------------+
Warning: The Petrolatum Trap in Folliculitis: Standard over-the-counter triple antibiotic ointments (containing bacitracin, neomycin, and polymyxin B in a petrolatum base) must NEVER be applied generously under an ostomy barrier. Petrolatum completely dissolves hydrocolloid and acrylic adhesives, leading to instantaneous pouch detachment and catastrophic effluent leakage. If topical mupirocin is prescribed, use the cream formulation or apply the ointment in a microscopic film, blot thoroughly, and seal with a non-alcohol barrier film.
A patient who changes their ostomy pouch daily presents with superficial epidermal skin stripping and denudation that corresponds precisely to the outer microporous adhesive tape border. During observation of a pouch change, the nurse notes the patient pulls the adhesive wafer upward at a 120-degree angle with a rapid, jerking motion without supporting the skin. Which corrective instruction is most effective to prevent recurrent MARSI?
An ostomy nurse is assessing a patient with a deep convex barrier and an ostomy belt tightened firmly to prevent leaks. Physical examination reveals tense, clear fluid-filled blisters localized strictly along the outer superior and inferior edges of the rigid convex ring. What is the underlying cause and appropriate clinical intervention?
A male colostomy patient with dense abdominal hair presents with multiple scattered, tender red papules and small pustules centered directly around hair follicles under the adhesive wafer. He admits to shaving the peristomal area every 3 days using a dry disposable safety razor. Which instructions should the nurse provide to resolve this peristomal folliculitis?
A patient with severe peristomal folliculitis exhibits extensive pustules and spreading erythema. The physician prescribes topical mupirocin 2% ointment. What critical precaution must the ostomy nurse implement to ensure that the patient's pouching system does not fail immediately after application?