Comprehensive Study Notes on Pressure Ulcers

Introduction to Pressure Ulcers

Pressure ulcers, also known as decubitus ulcers, bed sores, or pressure sores, are injuries that result from unrelieved pressure on the skin and underlying tissues.

Definition and Mechanism

A pressure ulcer is defined as an injury caused by unrelieved pressure that compromises the blood supply to the area. When pressure is applied to the skin, the surface may blanch (turn white), indicating a lack of blood flow. When the pressure is removed, normal color returns if the skin is intact. Prolonged pressure leads to skin death (necrosis).

Consequences of Prolonged Pressure

If blood flow is restricted for an extended period (e.g., eight hours), tissue death occurs. In older individuals, the situation may worsen due to diminished skin elasticity and circulation. Ultimately, neglected pressure can lead to necrotic tissue.

Locations of Pressure Ulcers

Pressure ulcers often occur over bony prominences or pressure points. Common locations include:

  1. Elbows
  2. Tailbone (sacrum)
  3. Shoulders
  4. Heels
  5. Iliac crests (sides of the pelvis)
  6. Back of the head
  7. Greater trochanter (hip)
  8. Acromial process (top of the shoulder)
  9. Ribs
  10. Genitalia
  11. Thighs and knees

Development of Pressure Ulcers

How Pressure Ulcers Begin

  1. Squeezing of Tissue: Tissue over a bony prominence becomes compressed between hard surfaces (e.g., a tailbone and a seat).
  2. Compromised Blood Supply: The application of pressure disrupts blood supply, cutting off oxygen and nutrients to the affected tissue, leading to tissue necrosis.

Prevention in Mobility Aids

It is common to use specialized cushions, like Roho cushions on wheelchairs, to alleviate hard surfaces and reduce the risk of ulcer formation.

Factors Leading to Pressure Ulcers

  1. Pressure: Continuous pressure on skin and tissues can cause damage.
  2. Shearing and Friction: Movement against surfaces can create shearing forces that harm skin integrity.
  3. Moisture: Exposure to moisture increases risk, leading to skin breakdown.
  4. Poor Circulation: Inadequate blood flow can exacerbate conditions.
  5. Skin Condition: Dry, flaky skin is more prone to damage, while irritation from bodily fluids, such as urine or feces, can accelerate breakdown, particularly in the elderly.

Care Considerations for Residents

Turning Protocol

Residents at risk for pressure ulcers should be turned every two hours to redistribute pressure. This is crucial because residents with cognitive impairments (e.g., dementia) might be unable to communicate discomfort effectively.

Observing Non-Verbal Cues

Observation of non-verbal cues is essential:

  • Grimacing
  • Fidgeting
  • Changes in behavior, similar to how babies express discomfort (screaming or moaning), can indicate that residents are uncomfortable or in pain.

Client Risk Factors for Pressure Ulcers

  1. Mobility Issues: Those confined to beds or chairs requiring assistance are at higher risk.
  2. Incontinence: Loss of bowel or bladder control leads to skin exposure to harmful bodily fluids.
  3. Nutrition: Poor nutritional status can restrict healing capacity and contribute to skin integrity concerns.
  4. Altered Sensation: Clients who have diminished ability to sense pain or pressure are at risk.
  5. Age: The elderly often have more thin and fragile skin, complicating matters.
  6. Circulatory Problems: Conditions affecting blood circulation increase ulcer development risk.
  7. Body Composition: Being obese or very thin can both pose different risks to skin integrity.
Early Indicators of Pressure Ulcers
  • Increased redness or warmth in a localized area can be indicative of initial ulcer development.
  • The analogy of an iceberg is pertinent: visible redness may signal a much deeper issue underneath the skin's surface, often unseen.
  • Pain, burning, itching, or tingling in the area may suggest compromised nerve endings.
Special Populations

Certain populations, such as immobilized patients, infants, or individuals with severe neurological impairments, may not be able to articulate discomfort but still experience pressure ulcers.

Importance of Skin Checks

Regular skin assessments are critical during all care activities. Immediate reporting to a supervisor is necessary if any signs of pressure ulcers are detected to ensure prompt intervention and care.