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Presentation on theme: "PREPARED BY: MS LEE MEE LING (SRN, SON) WOUNDS & TYPE OF DRESSING MATERIALS."— Presentation transcript:


2 LEARNING OBJECTIVES At the end of this session, the students are able to: 1. Define what wound is. 2. Recognize different types of wound based on their descriptions and characteristics shown. 3. Describe process of wound healing. 4. Identify commonly used dressing materials used for wound dressing.

3 DEFINITION OF WOUND Any physical injury involving a break in the skin or tissues, usually caused by an act or accident rather than by a disease.

4 TYPES OF WOUND NO.TERMSDESCRIPTIONS / CHARACTERISTICS 1.Intentional wound Occur during therapy eg. during operation or venipuncture or treatment. 2.Unintentional wound Caused by accidental conditions eg. cuts or falls. 3.Closed wound Traumatized tissues without a break in the skin eg. bruises. 4.Open wound Traumatized tissues with skin break or mucous membrane surface is broken.

5 CONT’ Open wound Intentional woundUnintentional wound Close wound

6 CONT’ NO.TERMSDESCRIPTIONS / CHARACTERISTICS 5.Contusion wound Closed wound; skin appears bruised from damaged blood vessels. Caused by blow from a blunt instrument. 6.Incision wound Open wound; deep or swallow. Caused by sharp instrument eg. knife or scalpel. 7.Abrasion wound Open wound involving the skin. Caused by surface scrape, either unintentional eg. scraped knee from a fall or intentional eg. dermal abrasion to remove birthmarks.

7 CONT’ Contusion woundIncision wound Abrasion wound

8 CONT’ NO.TERMSDESCRIPTIONS / CHARACTERISTICS 8.Puncture wound Open wound. Caused by penetration of the skin and often the underlying tissues by a sharp instrument; either intentional or unintentional. 9.Laceration wound Open wound; edges are often jagged. Caused by tissues torn apart, often from accidents eg. machinery. 10.Penetrating wound Open wound. Caused by penetration of the skin and the underlying tissues, usually unintentional eg. from a bullet or metal fragments.

9 CONT’ Punctured woundLaceration wound Penetrating wound

10 CONT’ NO.TERMSDESCRIPTIONS / CHARACTERISTICS 11.Clean woundUninfected wound in which minimal inflammation is encountered and the respiratory, alimentary, genital and urinal tracts are not entered. Wound granulation present. 12.Contaminated wound Include open, fresh, accidental wounds and surgical wounds involving a major break in sterile technique or a large amount of spillage from the gastrointestinal tract. Contaminated wounds show evidence of inflammation. 13.Dirty / Infected wound Include wounds containing dead tissues and wounds with evidence of a clinical infection eg. presence of purulent discharge or maggots.

11 CONT’ Clean woundContaminated wound Dirty/Infected wound

12 PROCESS OF WOUND HEALING WOUNDS HEAL IN 3 PHASES : 1.Inflammation phase - is when blood clots form, bacteria are attacked to prevent infection, and key biochemical cells gather at the site of the wound, causing it to swell. - inflammation begins almost immediately after injury, peaking at 3-5 days.

13 CONT’ 2. Proliferation phase - when these key cells multiply at the wound site to make new tissue and blood vessels. - open wounds generally heal from the bottom up, as cells multiply to fill in the wound with new tissue.

14 CONT’ 3. Remodeling phase - where the wound is healed and the initial scar tissue is gradually restructured.

15 TYPES OF DRESSING MATERIALS An appropriate dressing materials should provide these functions to enhance wound healing: 1. Provide mechanical and bacterial protection. 2. Maintain a moist environment at the wound or dressing interface. 3. Allow gaseous and fluid exchange. 4. Remain nonadherent to the wound. 5. Safe in use - nontoxic, nonsensitizing and nonallergic (both to the patient and the medical personnel). 6. Well acceptable to the patient eg. providing pain relief and not influencing movement.

16 CONT’ 7. Highly absorbable (for exuding wounds). 8. Absorb wound odor. 9. Sterile. 10. Easy to use (can be applied by medical personnel or the patient). 11. Require infrequent changing (if necessary). 12. Available in a suitable range of forms and sizes. 13. Cost effective and covered by health insurance systems.

17 CONT’ DRESSSING MATERIAL DESCRIPTIONPURPOSEEXAMPLES Transparent adhesive films/wound barriers Adhesive plastic, semipermeable, non- absorbent dressings allow exchange of oxygen between the atmosphere and wound bed. They are impermeable to bacteria and water. To provide protection against contamination and friction; to maintain a clean moist surface that facilitates cellular migration; to provide insulation by preventing fluid evaporation; and to facilitate wound assessment. Op-Site, Tegaderm

18 CONT’ DRESSSING MATERIAL DESCRIPTIONPURPOSEEXAMPLES Impregnated nonadherent dressings Woven or nonwoven cotton or sunthetic materials are impregnated with petrolatum,saline, zinc-saline, antimicrobials or other agents, Require secondary dressings to secure them in place, retain moisture and provide wound protection. To cover, soothe and protect partial and full thickness wounds without exudates. Jelonet, Bactigras

19 CONT’ DRESSSING MATERIAL DESCRIPTIONPURPOSEEXAMPLES HydocolloidsWaterproof adhesive wafers, pastes or powders. Wafers designed to be worn for up to 7 days, consist of two layers. The inner adhesive layer has particles that absorb exudates and form a hydrated gel over the wound; the outer film provides a seal. To absorb exudates; to produce a moist environment that facilitates healing but does not cause maceration of surrounding skin; to protect the wound from bacterial contamination, foreign debris and urine or feces; and to prevent shearing. Duoderm

20 CONT’ DRESSSING MATERIAL DESCRIPTIONPURPOSEEXAMPLES HydrogelsGlyserin or water-based nonadhesive jellylike sheets, granules or gels are oxygen permeable, unless covered by a plastic film. May require secondary occlusive dressing. To liquiefy necrotic tissue or slough, rehydrate the wound bed and fill in dead space. Aquasorb

21 CONT’ DRESSSING MATERIAL DESCRIPTIONPURPOSEEXAMPLES Polyurethane foams Nonadherent hydrocolloid dressings; these need to have their edges taped down or sealed. Require secondary dressings to obtain an occlusive environment. Surrounding skin must be protected to prevent maceration. To absorb light to moderate amounts of exudates; to debride wounds. Lyofoam, Allevyn

22 CONT’ DRESSSING MATERIAL DESCRIPTIONPURPOSEEXAMPLES Exudate absorbers (alginates) Nonadherent dressings of powder, beads or granules, ropes, sheets or paste conform to the wound surface and absorb up to 20 times their weight in exudates; require a secondary dressing. To provide a moist wound surface by interacting with exudates to form a gelatinous mass; to absorb exudates; to eliminate dead space or pack wounds and to support debridement. Kaltostat

23 DRESSING MATERIALS - construction and design



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