Historical Context & Motivation
Wound management has been a cornerstone of medical practice for millennia, yet the scientific understanding of wound healing physiology and the systematic application of evidence-based principles to guide clinical decision-making are relatively modern developments. For occupational therapists, wound management represents a critical intersection of biological science and functional rehabilitation — the therapist must understand tissue repair mechanisms at the cellular level while simultaneously considering how wound status affects a client's ability to engage in meaningful occupations. The progression from ancient wound care rituals to contemporary evidence-based wound management reflects centuries of clinical observation, scientific discovery, and interdisciplinary collaboration.
Early civilizations recognized that wounds required intervention, but the rationale behind their treatments was largely empirical and sometimes harmful. The ancient Egyptians documented wound care on papyrus scrolls as early as 1600 BCE, describing the use of honey, grease, and lint as wound dressings — practices that, remarkably, have some modern scientific support. The Greeks and Romans contributed observations about the importance of wound cleanliness and introduced the concept of primary versus secondary wound closure. However, it was not until the advent of germ theory and antiseptic technique in the nineteenth century that wound management began its transformation into a rigorous clinical discipline.
The central question that contemporary wound management addresses is this: how can clinicians — including occupational therapists — systematically assess wound characteristics, identify the current stage of healing, evaluate skin integrity, and select interventions that support tissue repair while maximizing a client's functional independence? This lesson explores those principles in depth, providing the foundational knowledge required for NBCOT Domain 3 competency.
Core Principles of Wound Healing & Skin Integrity
Effective wound management requires the occupational therapist to integrate knowledge from anatomy, physiology, and pathology into clinical reasoning. The skin — the body's largest organ — functions as a protective barrier, thermoregulatory surface, and sensory interface. When this barrier is disrupted, the body initiates a complex, overlapping cascade of biological processes collectively known as wound healing. Understanding the core principles that govern this process enables clinicians to match interventions to the wound's physiological needs at each stage of repair.
Phases of Wound Healing
Wound Classification
Moist Wound Healing Environment
Skin Integrity Assessment
OT-Specific Considerations
Visual Explanation — Phases of Wound Healing
The diagram above reveals a critical clinical principle: the phases of wound healing are not discrete, sequential events but rather overlapping biological processes. During hemostasis, vasoconstriction and platelet aggregation form a fibrin clot to achieve initial hemorrhage control. Within hours, the inflammatory phase begins as neutrophils and macrophages migrate to the wound bed to phagocytize bacteria and cellular debris — the clinical signs of redness, warmth, swelling, and pain at this stage are expected and should not be confused with infection. The proliferative phase follows, characterized by granulation tissue formation, angiogenesis (new blood vessel growth), and epithelialization (migration of epithelial cells across the wound surface). Finally, remodeling involves the reorganization of collagen fibers to increase tensile strength, though healed skin typically achieves only 70–80% of its original strength.
For the occupational therapist, recognizing which phase dominates at the time of evaluation determines whether the clinical priority is wound protection (hemostasis/inflammation), tissue support and gentle functional engagement (proliferation), or progressive stress loading and scar management (remodeling). Misalignment between the intervention and the healing phase can cause setbacks — for example, aggressive range-of-motion exercises during the inflammatory phase may disrupt fragile clot formation and restart the healing cascade.
Wound Assessment Mechanisms & Clinical Frameworks
Systematic wound assessment is the mechanism by which clinicians translate visual and tactile observations into actionable clinical decisions. Two dominant frameworks guide modern wound assessment: the Braden Scale for Predicting Pressure Sore Risk and the TIME framework for wound bed preparation. Together, these tools provide a structured approach to prevention, assessment, and intervention planning.
The Braden Scale — Pressure Injury Risk Assessment
The Braden Scale evaluates six subscales — sensory perception, moisture, activity, mobility, nutrition, and friction/shear — each rated from 1 (most impaired) to 3 or 4 (least impaired). The total score ranges from 6 to 23, with lower scores indicating higher risk for pressure injury development.
The TIME Framework — Wound Bed Preparation
The TIME framework provides a systematic approach to assessing and managing the wound bed itself. Each letter represents a clinical observation domain that must be evaluated and addressed for optimal healing.
| TIME Component | Clinical Focus | OT Intervention Examples |
|---|---|---|
| T — Tissue (non-viable or deficient) | Assess wound bed color and tissue type: black (necrotic/eschar), yellow (slough), red (granulation), pink (epithelialization). | Refer for debridement as needed; protect granulating tissue during ADL training; adapt activities to avoid wound disruption. |
| I — Infection or Inflammation | Differentiate normal inflammatory signs from infection indicators: increasing pain, purulent drainage, erythema extending beyond wound margins, elevated temperature. | Monitor for infection signs during treatment sessions; educate client on infection awareness; modify intervention intensity during active inflammation. |
| M — Moisture imbalance | Evaluate exudate type (serous, sanguineous, purulent) and amount; assess whether wound bed is too wet or too dry. | Coordinate with nursing on dressing selection; position client to prevent moisture accumulation; educate on skin care routines. |
| E — Edge of wound (non-advancing or undermined) | Assess wound edge characteristics: rolled, undermined, tunneling, or epithelializing. Non-advancing edges suggest systemic or local barriers. | Assess and document wound measurements; educate client on nutrition; modify ADL techniques to reduce shear at wound edges. |
Wound Measurement
Wound Classification & Pressure Injury Staging
Accurate wound classification is essential for appropriate intervention selection and documentation. Occupational therapists frequently encounter pressure injuries (formerly called pressure ulcers or decubitus ulcers) in rehabilitation settings, and the National Pressure Injury Advisory Panel (NPIAP) staging system is the standard classification framework. Understanding staging informs the therapist's decisions about positioning, activity modification, splinting, and pressure redistribution strategies.
Beyond pressure injuries, OTs encounter arterial ulcers (typically on the distal extremities, with well-defined wound margins and a pale wound bed due to inadequate arterial perfusion), venous ulcers (commonly in the medial lower leg/gaiter area, with irregular margins and high exudate due to venous insufficiency), neuropathic/diabetic ulcers (often on the plantar surface of the foot due to sensory loss and repetitive pressure), and surgical wounds healing by primary intention. Each wound type has a distinct etiology and requires tailored management strategies.
Worked Example — Clinical Wound Assessment & Intervention Planning
The following worked example demonstrates the clinical reasoning process an occupational therapist uses when assessing a wound and selecting interventions that align with the current stage of healing and the client's functional needs.
OT Interventions Matched to Healing Phases — Strengths & Limitations
The occupational therapist's ability to select appropriate interventions depends on accurately matching clinical actions to the dominant phase of wound healing. Each phase permits certain interventions and contraindicates others. The following table summarizes the key interventions, their therapeutic rationale, and limitations at each healing phase.
| Healing Phase | Appropriate OT Interventions | Precautions / Limitations |
|---|---|---|
| Hemostasis (Minutes–Hours) | Wound protection; immobilization of affected area; elevation to reduce blood flow; gentle compression as appropriate; client education on wound care precautions. | Avoid any activity that disrupts clot formation. No AROM/PROM at or near wound site. Monitor for excessive bleeding. Limited functional training during this phase. |
| Inflammation (1–6 Days) | Edema management (elevation, gentle retrograde massage distal to wound); pain management positioning; ADL adaptations to protect wound site; splinting to prevent contracture if immobilization needed. | Avoid aggressive ROM or stretching. Do not mistake normal inflammatory signs for infection. Heat modalities are generally contraindicated. Monitor for prolonged inflammation (> 7 days) which may indicate chronicity. |
| Proliferation (4–21 Days) | Gentle AROM within pain-free range; pressure redistribution and positioning; scar prevention with silicone sheeting; progressive ADL engagement; client education on nutrition and hydration; splinting for optimal positioning. | New granulation tissue and epithelium are fragile — avoid shear and friction at wound site. No aggressive stretching or resistive exercise near wound. Dressing changes should minimize wound bed disruption. |
| Remodeling (21 Days–2 Years) | Scar management (massage, silicone, compression garments); progressive resistive exercise; full ADL training; desensitization for hypersensitive scars; custom splinting for scar contracture prevention; work hardening and return-to-occupation planning. | Scar tissue reaches only 70–80% of original skin tensile strength. Sun protection for maturing scars. Monitor for hypertrophic scarring or keloid formation. Adjust intervention intensity based on tissue response. |
Connection to Advanced Theory — Chronic Wounds & Specialized Modalities
While the principles discussed above apply to wounds progressing through normal healing, occupational therapists frequently encounter chronic wounds — wounds that have failed to progress through the expected healing phases within the anticipated timeframe (typically defined as a wound that has not healed within 30 days). Chronic wounds are often stalled in the inflammatory phase, characterized by persistent inflammation, elevated matrix metalloproteinase (MMP) levels, and biofilm formation. Understanding the mechanisms of wound chronicity connects foundational wound management principles to advanced clinical decision-making and emerging therapeutic modalities.
| Feature | Acute Wound | Chronic Wound |
|---|---|---|
| Healing Timeline | Progresses through phases predictably; closed within 30 days for most wounds | Stalled or regressing; fails to heal within expected timeframe |
| Dominant Phase | Transitions sequentially from hemostasis → remodeling | Often trapped in the inflammatory phase with persistent elevated cytokines |
| Wound Bed | Healthy granulation tissue; minimal non-viable tissue | May show slough, eschar, biofilm; poor granulation; rolled wound edges |
| Contributing Factors | Typically a single etiology (trauma, surgical incision) | Multifactorial: diabetes, PVD, immunosuppression, malnutrition, sustained pressure, infection, smoking |
| OT Role | Phase-matched intervention, functional training, prevention | Address systemic barriers, advanced pressure redistribution, activity modification, patient/caregiver education, interdisciplinary coordination |
Emerging & Specialized Modalities
Advanced wound management modalities increasingly intersect with OT practice. Negative pressure wound therapy (NPWT) uses subatmospheric pressure to promote granulation tissue formation and is commonly encountered in rehabilitation settings, requiring the OT to adapt functional training around the device. Electrical stimulation has evidence supporting its use in chronic wound healing, particularly for pressure injuries, and falls within the OT scope of practice in many states. Pulsed lavage with suction is a debridement modality that OTs may use for wound bed preparation. Understanding the indications, contraindications, and functional implications of these modalities is essential for advanced clinical practice and represents a natural extension of the foundational wound management principles covered in this lesson.
Practice Problems
Lesson Summary — Wound Management Principles for OT Practice
Wound management in occupational therapy requires integrating knowledge of wound healing physiology with clinical reasoning about functional performance. Wounds progress through four overlapping phases — hemostasis, inflammation, proliferation, and remodeling — and the occupational therapist must match intervention intensity and type to the dominant phase. The Braden Scale provides a systematic framework for assessing pressure injury risk across six subscales, while the TIME framework (Tissue, Infection/Inflammation, Moisture, Edge) guides wound bed assessment and preparation. Wounds are classified using the NPIAP staging system for pressure injuries, and by etiology for arterial, venous, neuropathic, and surgical wounds.
OT-specific interventions include pressure redistribution, positioning, splinting, scar management, activity modification, and client education — all selected and graded based on the wound's healing status and the client's occupational goals. Chronic wounds, which are stalled in the inflammatory phase beyond 30 days, require additional clinical reasoning to identify and address systemic barriers such as diabetes, malnutrition, and vascular disease. Pressure injuries are never reverse-staged, and intervention planning must account for the fact that healed tissue reaches only 70–80% of its original tensile strength. For NBCOT preparation, focus on matching wound characteristics to healing phases, applying the Braden Scale and TIME framework to clinical scenarios, and articulating OT's unique role in wound prevention and management within the interdisciplinary team.