What Are Bed Sores (Pressure Ulcers)?
Bed sores, medically known as pressure ulcers or pressure injuries, are areas of localised damage to the skin and underlying soft tissue. They develop when sustained pressure, friction, or shear forces compress blood vessels and restrict blood flow to a particular area of the body. Without adequate blood circulation, the affected tissue is deprived of oxygen and nutrients, leading to cell death and tissue breakdown.
Pressure ulcers most commonly form over bony prominences where the skin is thin and there is little protective fat or muscle padding. The most vulnerable sites include the sacrum (tailbone area), heels, hips, elbows, shoulder blades, and the back of the head. These injuries are a significant concern for individuals who are bedridden, use a wheelchair, or have limited mobility, and they represent one of the most common complications in home care settings across Lahore and the wider Punjab region.
Prevention is far more effective and cost-efficient than treatment. When bed sores do develop, early detection and proper wound management are critical to preventing infection, tissue loss, and life-threatening complications such as sepsis or osteomyelitis (bone infection).
Causes and Risk Factors
Pressure ulcers result from a combination of mechanical forces acting on the skin and underlying tissue. Understanding these forces is essential for effective prevention.
Primary Causes
- Pressure: Sustained compression of tissue between a bony prominence and an external surface (such as a mattress or wheelchair seat) is the primary cause. Pressure that exceeds capillary closing pressure (approximately 32 mmHg) for even a short period can initiate tissue damage.
- Friction: When the skin rubs against bedding or clothing, the superficial layers can be damaged, creating an entry point for deeper injury.
- Shear: This occurs when the skin remains stationary while the underlying bone and tissue move in the opposite direction, for example when a patient slides down in bed. Shear forces are particularly damaging because they disrupt blood vessels deep within the tissue.
- Moisture: Prolonged exposure to sweat, urine, or faeces softens (macerates) the skin, making it far more vulnerable to damage from pressure and friction.
Risk Factors
- Immobility: The single most significant risk factor, whether due to paralysis, injury, surgery, sedation, or severe illness
- Advanced age: Older adults have thinner skin, reduced subcutaneous fat, and slower healing capacity
- Poor nutrition and dehydration: Inadequate protein, calorie, and fluid intake impairs tissue integrity and wound healing
- Incontinence: Both urinary and faecal incontinence expose skin to moisture and irritating substances
- Diabetes mellitus: Impairs circulation and sensation, increasing vulnerability and slowing healing
- Reduced sensation: Conditions such as spinal cord injury, neuropathy, or stroke prevent patients from feeling discomfort that would normally prompt repositioning
- Circulatory disorders: Peripheral vascular disease and heart failure reduce blood flow to the extremities
- Low body weight or obesity: Both extremes reduce the body's natural cushioning over bony areas
Stages of Bed Sores
Pressure ulcers are classified into four stages based on the depth and severity of tissue damage, along with two additional categories for unstageable and deep tissue injuries.
Stage 1: Non-Blanchable Erythema
The earliest stage presents as an area of intact skin that is red (or, in darker skin tones, may appear purple, blue, or have a different hue than surrounding skin). The key diagnostic feature is that the redness does not blanch (turn white) when pressed with a finger. The area may feel warmer, cooler, firmer, or softer compared to adjacent tissue. At this stage, the ulcer is superficial and can resolve within days with proper intervention.
Stage 2: Partial-Thickness Skin Loss
The skin breaks open, forming a shallow ulcer or a fluid-filled blister. The wound extends through the epidermis and into the dermis but does not penetrate the underlying subcutaneous tissue. The wound bed appears pink or red, is moist, and may be painful. With appropriate wound care and pressure relief, Stage 2 ulcers typically heal within one to three weeks.
Stage 3: Full-Thickness Skin Loss
The ulcer deepens through the dermis into the subcutaneous fat layer. Fat may be visible in the wound bed, but underlying muscle, tendon, and bone are not exposed. Slough (yellowish, stringy dead tissue) or eschar (black, dry, leathery dead tissue) may be present. Stage 3 ulcers often take one to three months to heal and carry a significant risk of infection. Professional wound care is strongly recommended at this stage.
Stage 4: Full-Thickness Tissue Loss
The most severe stage involves extensive tissue loss with exposure of muscle, tendon, joint capsule, or bone. Slough and eschar are often present, and undermining (tissue destruction extending beneath intact skin at the wound edges) or tunnelling (pathways extending from the wound into surrounding tissue) may be visible. Stage 4 ulcers are at extremely high risk for serious complications, including osteomyelitis and sepsis. Surgical intervention, including debridement and flap reconstruction, may be necessary.
Additional Classifications
- Unstageable: The wound base is covered by slough or eschar, making it impossible to determine the true depth
- Deep Tissue Pressure Injury (DTPI): A purple or maroon localised area of discoloured, intact skin or a blood-filled blister caused by damage to underlying soft tissue from pressure or shear
Risk Assessment: The Braden Scale
The Braden Scale is the most widely used clinical tool for assessing a patient's risk of developing pressure ulcers. It evaluates six subscales, each scored from 1 (highest risk) to 3 or 4 (lowest risk):
- Sensory Perception: Ability to respond meaningfully to pressure-related discomfort
- Moisture: Degree to which skin is exposed to moisture
- Activity: Level of physical activity
- Mobility: Ability to change and control body position
- Nutrition: Usual food intake pattern
- Friction and Shear: Degree to which the patient is at risk for friction and shear injury
Total scores range from 6 (highest risk) to 23 (lowest risk). A score of 12 or below indicates high risk, 13 to 14 indicates moderate risk, and 15 to 18 indicates mild risk. Home care nurses from Hum Home Care perform Braden Scale assessments upon initial evaluation and at regular intervals to monitor changes in risk status.
Prevention Protocols
Preventing pressure ulcers requires a systematic, proactive approach. The following evidence-based strategies form the foundation of any effective prevention programme:
Repositioning Schedules
Regular repositioning is the single most important preventive measure. The standard recommendation is to reposition at-risk patients at least every two hours around the clock, including during sleep. For wheelchair users, weight shifts should occur every 15 to 30 minutes. Repositioning should relieve pressure on vulnerable areas, and a written schedule should be maintained and followed consistently by all caregivers.
Support Surfaces
Specialised mattresses and cushions redistribute pressure and reduce the risk of tissue damage. Options include:
- Static air overlay mattresses for moderate-risk patients
- Alternating-pressure (active) air mattresses for high-risk patients
- Pressure-reducing foam cushions for wheelchair users
- Heel suspension devices to offload pressure from the heels
Skin Care and Moisture Management
Keeping the skin clean and dry is essential. Daily skin inspections should be performed, paying close attention to bony prominences. Barrier creams can protect skin from moisture and irritants. Incontinence should be managed promptly, and absorbent underpads or briefs should be used as needed.
Nutrition and Hydration
Adequate nutrition is fundamental to skin health and wound prevention. Patients should receive sufficient protein (1.25 to 1.5 grams per kilogram of body weight per day for those at risk), calories, vitamins (particularly C and A), minerals (particularly zinc), and fluids. A dietitian or home nurse can develop and monitor a nutritional care plan.
Wound Care at Home
When pressure ulcers develop, proper wound management is essential to promote healing and prevent complications. The approach depends on the stage of the ulcer.
Stage 1 and 2 Management
Early-stage ulcers can often be managed at home with diligent care. Key interventions include relieving all pressure from the affected area, applying transparent film dressings or hydrocolloid dressings to protect the wound and maintain a moist healing environment, and ensuring adequate nutrition and hydration. Stage 1 ulcers may resolve within days with proper pressure relief. Stage 2 ulcers typically heal within two to four weeks.
Stage 3 and 4 Management
Advanced ulcers require professional wound care. A trained home nurse can perform the following:
- Wound assessment and measurement: Regular documentation of wound size, depth, and characteristics to track healing progress
- Debridement: Removal of dead (necrotic) tissue using mechanical, enzymatic, autolytic, or sharp methods to promote healing
- Dressing selection: Choosing appropriate dressings based on wound characteristics, such as alginates for heavily exuding wounds or foam dressings for moderate exudate
- Infection monitoring: Watching for signs of infection including increased pain, warmth, swelling, purulent drainage, odour, or systemic symptoms such as fever
- Negative Pressure Wound Therapy (NPWT): In some cases, a vacuum-assisted closure device may be applied to promote granulation tissue formation
Hum Home Care provides skilled nurses experienced in advanced wound management who can deliver comprehensive wound care in the comfort of the patient's home in Lahore.
Nutrition for Wound Healing
Nutritional support is a critical component of pressure ulcer management. Wound healing places significant metabolic demands on the body, and malnutrition is a major barrier to recovery. Key nutritional considerations include:
- Protein: The building block of tissue repair. Aim for 1.25 to 1.5 g/kg/day. Good sources include eggs, chicken, fish, lentils (dal), dairy, and protein supplements
- Vitamin C: Essential for collagen synthesis. Found in citrus fruits, guava, strawberries, and bell peppers
- Zinc: Supports cell division and protein synthesis. Found in nuts, seeds, whole grains, and lean meat
- Vitamin A: Supports epithelial cell growth and immune function. Found in carrots, sweet potatoes, and leafy green vegetables
- Hydration: Adequate fluid intake (typically 1.5 to 2 litres daily) maintains skin turgor and supports circulatory function
- Calories: Sufficient caloric intake prevents the body from breaking down its own tissue for energy, which would impair wound healing
Home nurses and caregivers can assist with meal planning, feeding assistance, and monitoring nutritional intake to ensure the patient receives optimal support for wound healing.
Emergency Signs Requiring Immediate Medical Attention
Seek urgent medical care if any of the following signs are present:
- Rapidly spreading redness, warmth, or swelling around the wound
- Pus, foul-smelling drainage, or increasing wound pain
- Fever, chills, or rapid heartbeat
- Confusion or altered mental status in an elderly patient
- Exposed bone or tendon (Stage 4 ulcer not previously identified)
- Black, necrotic (dead) tissue that is spreading
- Signs of sepsis: rapid breathing, low blood pressure, extreme weakness
In Lahore, call 03250600666 immediately or message us on WhatsApp for urgent home care assistance.
Prevention and Daily Management
A comprehensive daily management plan for at-risk patients should include the following elements:
- Conduct a full-body skin check every morning and evening, documenting any new or worsening areas
- Follow a strict two-hourly repositioning schedule, using a written log
- Maintain clean, dry skin with appropriate moisturisers and barrier products
- Use pressure-redistributing support surfaces on the bed and wheelchair
- Ensure the patient consumes adequate protein, calories, vitamins, and fluids daily
- Manage incontinence promptly with appropriate products and skin care
- Keep bed linens clean, dry, and free of wrinkles and crumbs
- Elevate the heels off the bed surface using pillows or heel suspension devices
- Avoid positioning the patient directly on a pressure ulcer or on bony prominences
- Encourage active or passive range-of-motion exercises to promote circulation
Professional caregivers from Hum Home Care are trained to implement and maintain these protocols, providing families in Lahore with the confidence that their loved ones are receiving the highest standard of preventive care.
