Pressure Injuries (Pressure Ulcers / Bedsores)
Pressure injuries, also known as pressure ulcers or bedsores, are localized damage to the skin and underlying tissue that occur when a person remains in one position for too long. These wounds are common in individuals who have limited mobility, such as patients who are bedridden, in a coma, or use a wheelchair. Pressure injuries typically develop over bony areas like the hips, heels, elbows, or tailbone.
Stage I to Stage IV Pressure Ulcers
What are Stage I to Stage IV Pressure Ulcers?
Pressure ulcers are categorized by stages depending on their severity:
- Stage I: Red, non-blanchable skin (does not turn white when pressed), but skin is still intact.
- Stage II: Partial-thickness skin loss, often presenting as a blister or shallow open sore.
- Stage III: Full-thickness skin loss with damage to fat tissue; may expose deeper layers but not muscle or bone.
- Stage IV: Deep wound extending to muscle, bone, or tendons, often with dead tissue and a high risk of serious infection.
How Does the Wound Happen?
When pressure is applied to a part of the body for a prolonged time, especially over bony areas that blood flow to that region is reduced or cut off. Without oxygen and nutrients, the tissue begins to break down. Factors like friction from sheets, moisture from sweat or incontinence, and poor nutrition can worsen the condition. People with limited ability to move or shift positions are at the highest risk.
What Happens If Not Treated?
- Worsening of wound stage: A Stage I ulcer can quickly progress to Stage II or higher if pressure continues, increasing the depth and severity of the injury.
- Tissue destruction: As the wound deepens, it may destroy skin, fat, muscle, and even bone, creating extensive and difficult-to-heal damage.
- Infection risk: Open wounds provide an easy entry point for bacteria. Infections can spread to deeper tissue (cellulitis), bones (osteomyelitis), or into the bloodstream (sepsis).
- Necrosis and odor: Dead tissue may develop in advanced-stage ulcers, resulting in foul odor, blackened skin, and increased risk of systemic infection.
- Pain and reduced function: As the ulcer progresses, it may cause significant pain, reduced mobility, and require extensive medical treatment or hospitalization.
- Long-term care or surgery: Advanced ulcers may require surgical debridement, skin grafts, or prolonged wound care management.
Deep Tissue Pressure Injury
What is Deep Tissue Pressure Injury?
A deep tissue pressure injury (DTPI) presents as a dark, maroon, or purple area of discolored skin, or as a blood-filled blister. Unlike early-stage pressure ulcers, the skin may still be intact, but the tissue beneath is already severely damaged.
How Does the Wound Happen?
DTPI occurs when intense or prolonged pressure causes damage to the muscle and deeper tissues before the surface of the skin shows obvious signs. It is often the result of pressure over bony areas or repeated shear forces. These injuries can develop quickly—sometimes within hours of immobility—and are difficult to detect in their early stages.
What Happens If Not Treated?
- Rapid deterioration: Although the skin may look intact, the tissue underneath may already be severely compromised. Without intervention, the skin can quickly break down, exposing a deep and advanced wound.
- Hidden infection risk: The internal tissue damage may harbor bacteria, leading to infection before any open wound appears. This hidden infection can go unnoticed and spread rapidly.
- Progression to full-thickness ulcer: DTPI can evolve into Stage III or IV pressure ulcers once the skin opens, requiring intensive treatment and prolonged recovery.
- Severe pain and mobility issues: As tissue breaks down and pressure remains unrelieved, patients may experience increased pain and reduced mobility, particularly if joints or muscles are affected.
- Risk of misdiagnosis: Without prompt recognition, DTPI may be mistaken for minor bruising or discoloration, delaying effective treatment and increasing the risk of complications.
Unstageable Pressure Ulcers
What are Unstageable Pressure Ulcers?
Unstageable pressure ulcers are wounds where the base of the ulcer is covered by slough (yellow, tan, green tissue) or eschar (dead, black tissue), making it impossible to determine the depth and stage of the wound without debridement.
Unstageable ulcers typically result from prolonged and untreated pressure in patients with limited mobility. The dead or necrotic tissue that forms over the wound is a sign of severe tissue damage underneath. Often, the ulcer has reached Stage III or IV beneath the surface, but the covering tissue prevents accurate assessment until removed.
What Happens If Not Treated?
- Inability to assess severity: Since the wound is obscured by dead tissue, medical professionals cannot determine how deep or extensive the damage is. This makes treatment planning difficult and delays healing.
- Ongoing tissue death: Without debridement, the necrotic tissue will continue to spread, destroying more of the surrounding skin and tissue.
- High infection risk: The presence of dead tissue creates a breeding ground for bacteria. Infections in unstageable wounds can easily become chronic or systemic.
- Delayed healing or non-healing wound: Without timely removal of slough or eschar, the wound cannot begin the healing process, remaining stagnant and worsening over time.
Surgical intervention required: In many cases, these ulcers require surgical debridement or specialized wound care techniques, especially if the tissue damage is extensive.
