🩺 Wound Dressing

Wound dressing is a fundamental clinical skill aimed at optimizing the environment for tissue repair while preventing infection. It involves the systematic assessment of a wound, cleaning it using aseptic principles, and selecting an appropriate dressing based on the characteristics of the wound bed and the level of exudate. In the UK, the Aseptic Non-Touch Technique (ANTT) is the gold standard for preventing healthcare-associated infections during this procedure. Effective wound management requires an understanding of the healing process and the ability to recognize complications such as infection or chronicity.

Wound dressing is indicated to promote the healing process by maintaining a moist environment, managing exudate, and protecting the wound from physical trauma and microbial contamination. It is required for surgical incisions, traumatic wounds (lacerations, abrasions), and chronic wounds like pressure ulcers, venous leg ulcers, or diabetic foot ulcers. Dressings are also used to provide compression, keep topical medications in place, and debride necrotic tissue through autolysis. Every wound that has breached the dermis should be considered for a dressing to facilitate the four stages of wound healing: haemostasis, inflammation, proliferation, and remodelling.

There are no absolute contraindications to dressing a wound, but certain *types* of dressings have contraindications. For example, hydrocolloid dressings should not be used on clinically infected wounds or heavily exudating wounds. Adhesive dressings are contraindicated in patients with known allergies to the adhesive components. Compression dressings are strictly contraindicated in patients with significant peripheral arterial disease (ABPI <0.5). Topical treatments like iodine-based dressings should be avoided in patients with thyroid disorders or iodine sensitivity. Dressings should not be applied if they obscure the ability to monitor a rapidly spreading infection (e.g., necrotising fasciitis).

Sterile dressing pack (including sterile field, gauze, gallipot, and forceps). Cleaning solution (usually 0.9% sodium chloride). Appropriate primary dressing (e.g., non-adherent, foam, hydrogel, or alginate). Secondary dressing if required (e.g., absorbent pad). Adhesive tape or bandage. Sterile or non-sterile gloves (depending on the ANTT level required). Clinical waste bag and apron. Measuring guide and camera (if clinically indicated and with consent). Alcohol hand rub.

Prepare the environment and explain the procedure to the patient. Perform hand hygiene and don an apron. Clean the trolley and open the sterile dressing pack using ANTT. Pour the cleaning solution into the gallipot. Remove the old dressing (using non-sterile gloves) and dispose of it. Wash hands and don new gloves. Inspect the wound for signs of infection and measure its size. Clean the wound with saline-soaked gauze using a non-touch technique. Select and apply the appropriate primary dressing based on the wound's needs (e.g., moisture level). Apply a secondary dressing or tape as required. Dispose of all waste, remove gloves, and wash hands. Document the wound assessment and the specific dressings used.

Interpretation involves assessing the wound bed and the surrounding skin to guide management. Red, granulating tissue indicates healthy healing; yellow slough or black necrosis suggests a need for debridement. High levels of exudate may require highly absorbent dressings like alginates, while dry wounds may need rehydration with hydrogels. The clinician must interpret signs of infection: increased pain, erythema extending beyond the wound margin (cellulitis), malodour, or purulent discharge. Stagnation in wound size or 'friable' granulation tissue can be signs of biofilm or local infection. Comparing current measurements to previous documentation is essential to interpret whether the current treatment plan is effective.

Choosing the wrong type of dressing for the wound's state (e.g., putting a drying dressing on an already dry wound or an occlusive dressing on an infected wound) is a common error. Using an inappropriate cleaning solution, like hydrogen peroxide on healthy granulating tissue, can be cytotoxic and delay healing. Failing to maintain a true aseptic non-touch technique (ANTT) during the procedure can introduce infection. Another mistake is applying adhesive tapes too tightly, causing skin tension and potential blistering. Forgetting to document the wound's dimensions and characteristics makes it impossible to track healing progress over time.

In an OSCE, focus heavily on the ANTT. Define your 'non-touch' area and your 'clean' area clearly. Wash your hands before and after the procedure. Peel the dressing pack open carefully without touching the sterile interior. Clean the wound using a single swipe with each gauze swab, moving from the 'cleanest' to 'dirtiest' area (usually centre to periphery). Dispose of soiled dressings immediately into the waste bag. Always ask the patient about their pain levels before and during the procedure. Ensure you state you would document the wound appearance clearly.

The MLA syllabus requires students to understand the principles of wound care and the application of ANTT. Knowledge of the 'TIME' framework (Tissue, Infection/Inflammation, Moisture balance, Edge of wound) is highly valuable for the 'Assessment and Management' of wounds. Students should be able to differentiate between primary and secondary intention healing. Awareness of when to refer to specialist tissue viability nurses or vascular surgeons is a key clinical decision-making skill. Understanding the impact of nutrition and comorbidities (like diabetes) on wound healing is also a core requirement.