Debridement can be:<\/p>\n
- \n
- Selective:<\/strong> Removal of unhealthy tissue while healthy tissue is spared<\/li>\n
- Nonselective:<\/strong> Removal of both healthy and unhealthy tissues.<\/li>\n<\/ul>\n
Forms of debridement include:<\/p>\n
- \n
- Autolytic debridement:<\/strong> Performed by WBCs during the first 3 to 5 days after the wound occurs (inflammatory\/debridement phase) (Figures 1 to 4<\/strong>). This form of debridement is the most selective because it spares healthy cells and intact matrix molecules while removing damaged cells and matrix with microscopic precision.2<\/sup><\/li>\n
- Surgical debridement:<\/strong> Tissue removed by surgeon according to characteristics, such as color, texture, vascular supply, and temperature; selective on a macroscopic level.<\/li>\n
- Mechanical debridement:<\/strong> Physical removal of tissue adhered to a dried-on dressing; nonselective and, thus, the least desirable form of debridement.<\/li>\n<\/ul>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig01.jpg\")
<\/a><\/p>\nFIGURE 1. Several days after being hit and pinned under a car, this mixed-breed dog developed an eschar on its left side that ultimately sloughed, leaving a large wound. Surgical intervention was limited due to the client\u2019s financial restrictions. Because this dog was treated before my exposure to moist wound healing practices, healing time was long. The boxed area shows the location of the wound.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig02.jpg\")
<\/a><\/p>\nFIGURE 2. Patient from Figure 1; day 7 after injury: Necrotic tissue and an eschar (asterisk) remain after a large section of skin had sloughed. Microscopically, WBCs are selectively debriding the diseased tissue. Surgical debridement and lavage were performed after this photograph was taken.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig03.jpg\")
<\/a><\/p>\nFIGURE 3. Patient from Figure 1; day 11 after injury: Granulation tissue is moving in from the periphery of the wound, while the central area is still undergoing debridement by WBCs.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig04.jpg\")
<\/a><\/p>\nFIGURE 4. Patient from Figure 1; week 6 after injury: Granulation tissue is filling the wound. A rim of pink epithelial cells is migrating inward across the granulation tissue, building new skin. Contraction has pulled pre-existing skin inward, diminishing the size of the wound.<\/strong><\/h6>\n
Wound Closure<\/strong><\/h2>\n
Wound closure is performed after all contaminants and nonviable tissue have been removed, and it can be orchestrated by the animal\u2019s body or clinician.<\/p>\n
Physiology of Wound Closure<\/strong><\/h3>\n
The body typically accomplishes closure over 2 to 4 weeks via the repair (proliferative) phase of wound healing.2<\/sup> During this phase, skin coverage of the wound is achieved through 2 simultaneous, yet independent, means\u2014epithelialization<\/strong> and contraction<\/strong>.<\/p>\n
This process is accomplished by creation of:<\/p>\n
- \n
- Granulation tissue:<\/strong> As wound bed debridement by WBCs progresses, cells on the periphery of the wound receive signals to move in and fill the cleaned-out defect with granulation tissue. Granulation tissue is built by fibroblasts, which secrete new extracellular matrix molecules (eg, collagen, elastin) and endothelial cells, which build new blood vessels (Figures 2 and 3<\/strong>).<\/li>\n
- Epidermis:<\/strong> Epithelial cells on the skin edge then migrate onto the granulation tissue, which provides the oxygen, moisture, and surface required for epithelial cells to proliferate, cross the wound, and create a new epidermis (Figure 4<\/strong>).<\/li>\n
- Myofibroblasts:<\/strong> Wound contraction occurs when the fibroblasts that formed the granulation tissue meet in the center of the wound and develop characteristics similar to smooth muscle. Now called myofibroblasts, these cells\u2014linked to each other by intercellular connections and to the wound edges via their attachments to the granulation tissue\u2014contract and exert centripetal force on the skin edges, drawing them toward the center of the wound (Figure 4<\/strong>).<\/li>\n<\/ul>\n
\nGradation of Wound Effusion<\/h2>\n
Wound fluid<\/strong>, a derivation of plasma that leaks out of blood vessels due to increased capillary permeability in response to inflammation,3<\/sup> contains many beneficial factors for healing, including oxygen, nutrients, cytokines, growth factors, chemotactic factors, WBCs, enzymes that aid selective debridement, and systemic antibiotics, if the animal is receiving them.3-6<\/sup> Wound fluid is serosanguineous in appearance.<\/p>\n
Exudate<\/strong>, which has a more cloudy appearance, consists of wound fluid plus liquefied necrotic tissue created by WBCs via autolytic debridement and edema caused by inflammation, decreased patient mobility, and inadequate lymphatic or venous drainage.6<\/sup> Exudate levels are proportionate to the amount of contamination, infection, and tissue damage in a wound, and should subside as the wound transitions from the inflammatory\/debridement phase to the repair phase. Persistent exudate is an indication that more aggressive surgical debridement may be needed to remove foreign material, sites of infection, and\/or nonviable tissues.<\/p>\n
\nSurgical Closure of Wounds<\/strong><\/h3>\n
Surgical closure can be:1<\/sup><\/p>\n
- \n
- Primary:<\/strong> Immediate<\/li>\n
- Delayed primary:<\/strong> Before granulation tissue formation<\/li>\n
- Secondary:<\/strong> After granulation tissue formation.<\/li>\n<\/ul>\n
Surgical closure should be reserved for wounds that contain only viable tissue, are free of contamination, and can be closed in a tension-free manner. Regardless of timing, surgical closure is preceded by one or more rounds of debridement and lavage, and, except in the case of primary closure, initial management as an open wound.<\/p>\n
Open Wound Management<\/h2>\n
Open wound management includes covering the wound with an appropriate dressing and bandage; it does not<\/em> mean the wound is left open to the environment. The goal of open wound management is to work synergistically with the cells, providing the best environment possible to support the body\u2019s wound healing process.<\/p>\n
In some cases, open wound management may be continued until the wound closes on its own (second intention healing); this is appropriate when:<\/p>\n
- \n
- Healing is progressing well<\/li>\n
- Reconstructive surgery is not<\/em> needed to prevent contracture or scarring that might inhibit mobility or be cosmetically unacceptable<\/li>\n
- The patient tolerates bandaging.<\/li>\n<\/ul>\n
Wet-to-Dry Bandages<\/strong><\/h3>\n
Wet-to-dry bandages involve placing saline-soaked gauze pads on the wound, then removing them after the bandages have dried and adhered to the wound. Although once a traditional choice in human and veterinary medicine, wet-to-dry bandages are no longer the standard of care because they compromise wound healing in many ways (Table 1<\/strong>).1,7-11\u00a0<\/sup><\/p>\n
![\"Table](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Table01.jpg\")
<\/p>\nMoist Wound Healing<\/strong><\/h3>\n
Moist wound healing (MWH) is now the standard of care.1,4,7,9,11<\/sup> Moist\u2014not<\/em> soaking wet or dry\u2014wound healing techniques can be achieved with MRDs, and numerous studies confirm the benefits of MRDs compared with traditional wet-to-dry or dry dressings (Table 1<\/strong>).4-6,9,12<\/sup><\/p>\n
Choice of MRD is based on the specific needs of the wound at that point in time (eg, debridement, granulation, epithelialization) and amount of exudate the wound is likely to produce:<\/p>\n
- \n
- During the inflammatory\/debridement phase<\/strong>, the chosen MRD should support selective autolytic debridement by WBCs and function of cytokines<\/em> that signal the repair phase, as well as be able to absorb the exudate generated by that debridement.<\/li>\n
- During the repair phase<\/strong> of healing, the chosen MRD should support function of growth factors and fibroblasts, endothelial cells, and epithelial cells<\/em> responsible for granulation, epithelialization, and contraction, while either removing exudate or adding moisture back to the wound, if needed.4,5,9,12<\/sup><\/li>\n<\/ul>\n
Occurrence of Infection<\/strong><\/h3>\n
A common concern raised about MRDs is whether they favor bacteria. Studies demonstrate that rates of infection with plain MRDs are no greater than, or significantly less than, rates of infection with traditional wet-to-dry or dry dressings.5,9,13<\/sup><\/p>\n
Reasons that MRDs do not<\/em> increase infection rates include:<\/p>\n
- \n
- WBCs and their bacteria-fighting proteases function best in a moist environment.<\/li>\n
- Less desiccated tissue, which serves as a medium for bacteria, is present.<\/li>\n
- The occlusive or semi-occlusive nature of MRDs decreases oxygen tension and pH, conditions that attract WBCs, stimulate angiogenesis and collagen formation, and inhibit bacteria.<\/li>\n
- MRDs better protect against exogenous bacteria because they are more occlusive than gauze and do not need to be changed as often as wet-to-dry or dry dressings.5,9,13<\/sup><\/li>\n<\/ul>\n
MRDs impregnated with antimicrobial substances, such as honey, silver, or zinc, may be beneficial in infected wounds.4,7,14<\/sup><\/p>\n
Types of MRDs<\/strong><\/h3>\n
Many MRDs are available (Table 2<\/strong>). In my experience, the clinician can manage most companion animal wounds by focusing on the following 4 types (in order from most absorptive to least absorptive):<\/p>\n
- \n
- Calcium alginate<\/li>\n
- Polyurethane foam<\/li>\n
- Hydrocolloid<\/li>\n
- Hydrogel.<\/li>\n<\/ol>\n
Table 3<\/strong> summarizes the characteristics and indications for each of these dressings.
![\"Table](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Table02-300x181.jpg\")
<\/a> ![\"Table](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Table03.jpg\")
<\/a><\/p>\nSelection of MRDs<\/strong><\/h3>\n
To select the most appropriate MRD, the clinician must ask:<\/p>\n
- \n
- How much exudate do I expect this wound to produce?<\/li>\n
- What does this wound need (eg, debridement or granulation)?<\/li>\n<\/ul>\n
Table 4<\/strong> provides guidelines for selecting a dressing based on the answers to these 2 questions. Examples of appropriate dressing selection and application in veterinary patients are provided by Figures 5 to 16<\/strong>.
![\"Table](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Table04.jpg\")
<\/a> ![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig05.jpg\")
<\/a><\/p>\nFIGURE 5. A German shorthaired pointer dog with multiple maggot-infested bite wounds. The appearance of this right lateral wound near the stifle was typical of this dog\u2019s wounds. After the dog was anesthetized, wounds were lavaged and debrided of clearly nonviable tissue and maggots. Sutures were placed around the wound to secure a tie-over bandage.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig06.jpg\")
<\/a><\/p>\nFIGURE 6. Patient from Figure 5: Calcium alginate was placed in the wounds to absorb the anticipated high level of exudate and support ongoing autolytic debridement by WBCs.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig07.jpg\")
<\/a><\/p>\nFIGURE 7. Patient from Figure 5: The calcium alginate dressing and bandage were changed 39 hours later; gelled calcium alginate is seen, contoured to the surface of the wound.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig08.jpg\")
<\/a><\/p>\nFIGURE 8. Patient from Figure 5: Removal of the saturated calcium alginate; the slight malodor and purulent-like appearance are characteristic of saturated calcium alginate and do not indicate wound infection. After 7 days of MWH, the wound contained a healthy granulation bed and was surgically closed.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig09A.jpg\")
<\/a>\u00a0\u00a0\u00a0 ![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig09B.jpg\")
<\/a><\/p>\nFIGURE 9. Degloving wound on the distal limb of a small-breed dog: This fresh wound with extensive damage is expected to be highly exudative, making calcium alginate an appropriate choice (A). Granulation tissue is forming, but the wound still has a moderately high exudate level; therefore, a polyurethane foam dressing is appropriate (B).<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig10.jpg\")
<\/a><\/p>\nFIGURE 10. A 5-year-old border collie was hit by a car and sustained a degloving wound of the distal left hindlimb with exposed bone and tendon. Granulation tissue was forming with the use of MWH techniques. Polyurethane foam was selected due to the expectation of a moderately high exudate level and need for additional granulation and epithelialization.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig11.jpg\")
<\/a><\/p>\nFIGURE 11. Patient from Figure 10: The polyurethane foam dressing was pressed onto the wound to create an imprint, then cut around the imprint so that the dressing would fit in the wound bed and not overlap skin.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig12-e1436992505168.jpg\")
<\/a><\/p>\nFIGURE 12. Patient from Figure 10: Six days and 2 bandage changes after the previous images (Figure 10 and 11) were taken, the wound had a healthy granulation bed and epithelialization was underway. A skin graft was then performed.<\/strong><\/h6>\n
<\/p>\n
![\"\"](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig13New-300x225.jpg\")
<\/a><\/p>\nFIGURE 13. Nonhealing axillary wound\u2014that had dehisced after each of several attempts at closure\u2014in a cat. Prior to this image, the wound had no granulation tissue and a moderately high exudate level; thus, it was bandaged with a polyurethane foam dressing. At the time of this image, the wound required additional granulation tissue and epithelialization. Because the exudate level had decreased to a moderately low level, a polyurethane foam dressing\u2014premoistened with saline before application\u2014was used. The wound healed without requiring surgery.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig14.jpg\")
<\/a><\/p>\nFIGURE 14. Wound on the medial tarsus of a dog\u2019s limb that is producing a moderate level of exudate; granulation tissue is present but the wound requires epithelialization. Hydrocolloid or saline-moistened polyurethane foam are appropriate dressing choices.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig15.jpg\")
<\/a><\/p>\nFIGURE 15. Degloving wound\u2014that has been lavaged and debrided\u2014on distal limb of border collie dog; residual moisture from the lavage can be seen. Due to the wound\u2019s dry nature, a hydrogel dressing was selected.<\/strong><\/h6>\n
<\/p>\n
![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig16A.jpg\")
<\/a>\u00a0 ![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig16B.jpg\")
<\/a> ![\"Figure](\"https:\/\/todaysveterinarypractice.com\/wp-content\/uploads\/sites\/4\/2015\/07\/T1507F03_Fig16C.jpg\")
<\/a><\/p>\nFIGURE 16. Dry, chronic wound on the tarsus of an 8-year-old Labrador retriever; hydrogel-impregnated gauze was placed after debridement (A). Following placement of a Telfa pad (covidien.com) over the hydrogel gauze, a polyurethane film was placed on top to secure the primary and secondary dressings and help maintain moisture in the wound (B and C).<\/strong><\/h6>\n
Application of MRDs<\/strong><\/h2>\n
MRDs are typically applied after surgical debridement and lavage. However, in a compromised patient in which anesthesia and surgical debridement are not possible, MWH provides a safe means of getting wound debridement underway until the patient is more stable.<\/p>\n
Fitting the Dressing<\/strong><\/h3>\n
As for any wound, use aseptic technique when handling the MRD and tissue.1<\/sup> MRDs retain moisture in the wound. To avoid maceration (overhydration) of the skin and subsequent compromise of its epithelial barrier function, ensure the dressing is in contact with the wound surface but not<\/em> with the skin (Figures 5, 6, and 10 to 12<\/strong>).9,14<\/sup><\/p>\n
- \n
- To help achieve the right fit, press the dressing on the wound and cut along the resulting imprint (Figure 11<\/strong>).<\/li>\n
- When fitting the dressing to the wound, consider the wound\u2019s depth and contour:\n
- \n
- Dressings that absorb and retain a lot of exudate, such as calcium alginate and polyurethane foam, increase in size.<\/li>\n
- Dressings that begin as a gel, or interact with wound fluid to become a gel, conform well to the nooks and crannies of an irregular wound surface (Figures 7 and 8<\/strong>).<\/li>\n
- Some MRDs have adhesive borders designed to adhere to the periwound skin and protect it from moisture (Figure 16<\/strong>).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
Adding a Semipermeable Cover<\/strong><\/h3>\n
When a semipermeable cover is not built into the MRD, adding an adhesive transparent polyurethane film over the MRD can be desirable in some cases (Figure 16<\/strong>). The semipermeable film allows gas exchange but serves as a barrier to bacteria and moisture. Thus, the film:7,9<\/sup><\/p>\n
- \n
- Helps protect wound from exogenous organisms<\/li>\n
- Keeps wound fluid in and environmental fluid out of the wound<\/li>\n
- Helps hold the MRD in place.<\/li>\n<\/ul>\n
Because the film is waterproof and has no absorptive capability of its own, it prevents wicking of excess exudate into the cast padding. Therefore, it should not<\/em> be used in situations in which the underlying MRD cannot absorb and retain all of the wound\u2019s exudate.<\/p>\n
Bandaging the Wound <\/strong><\/h3>\n
After placement of the MRD, bandage the wound in the standard fashion with:<\/p>\n
- \n
- Cast padding:<\/strong> To keep the dressing in contact with the wound, absorb excess moisture, and provide protection<\/li>\n
- Conforming gauze roll:<\/strong> To stabilize the cast padding<\/li>\n
- Outer layer:<\/strong> Surgical tape or a cohesive (self-adherent) wrap, to provide pressure appropriate to the injury and keep inner layers clean.15<\/sup><\/li>\n<\/ul>\n
Changing the MRD<\/strong><\/h2>\n
The frequency of bandage changes depends on:<\/p>\n
- \n
- Amount of exudate produced<\/li>\n
- How well the exudate is being addressed by the MRD.<\/li>\n<\/ol>\n
The dressing should be changed before it becomes oversaturated <\/em>or dries out<\/em>.<\/p>\n
- \n
- Lift gel out if coherent (Figure 8<\/strong>), or gently lavage the gel out if not.<\/li>\n
- If the MRD has dried out and is stuck to the wound, inject sterile saline at the dressing\/wound interface to release the dressing and avoid a wet-to-dry effect.<\/li>\n<\/ul>\n
Adherence of the dressing may signal that the chosen dressing was:<\/p>\n
- \n
- Too absorptive for the given exudate level<\/li>\n
- Left in place too long.<\/li>\n<\/ol>\n
In either case, a different dressing should be selected for the replacement bandage.<\/p>\n
Indeed, the dressing selected at the beginning of wound management is likely to be different from the dressing selected later in wound healing because exudate level and needs of the wound change over time.<\/p>\n
- \n
- During the inflammatory phase<\/strong> of healing, when exudate production is highest, a properly chosen MRD is typically changed every 2 to 3 days<\/strong>.<\/li>\n
- As granulation tissue forms<\/strong>, a less absorptive dressing is usually appropriate, and the interval between bandage changes may be increased up to 7 days<\/strong>.<\/li>\n
- A bandage change should always be performed if strike-through or soiling occurs, regardless of the time since the dressing was placed.<\/li>\n<\/ol>\n
Making the Change to MWH<\/strong><\/h2>\n
The use of MRDs and MWH requires some adjustments for clinicians more familiar with dry or wet-to-dry dressings.<\/p>\n
Qualities of Gel<\/strong><\/h3>\n
Many MRDs combine with wound fluid to form a gel, and it is normal for this gel to have a slight odor, yellowish tinge, and slimy feel. While these characteristics can give the impression of infection, they are normal properties of these gels (Figure 8<\/strong>).<\/p>\n
The wound and patient should always be examined for signs of infection, such as redness, swelling, pain, purulent discharge, and fever. In the absence of such signs, the bandage change can proceed as planned. If infection is present, MWH should still be used to support WBC function, with the dressing choice adjusted, if needed, to handle a higher exudate level.<\/p>\n
Timing of Dressing Changes<\/strong><\/h3>\n
The clinician new to MWH may initially feel uncomfortable waiting multiple days between bandage changes. One way to handle this concern is to, using aseptic technique, unwrap the bandage and look at the dressing in the wound. Upon noting, for example, that a calcium alginate or polyurethane foam dressing is not yet saturated, or that a hydrogel is still moist, the dressing is left in place and bandage replaced. After examining dressings for a few patients, the clinician becomes familiar with the behavior of MRDs and comfortable with the longer intervals between bandage changes.<\/p>\n
Increased Cost of MWH<\/strong><\/h3>\n
Some clinicians may hesitate to use MRDs because the dressings themselves cost more than gauze or other dry dressings. However, the most cost effective dressing is the one that results in lowest overall cost of care.10<\/sup> The overall cost of treating a wound with MRDs is lower than with traditional wet-to-dry or dry dressings for several reasons, including faster healing time, less frequent bandage changes (and, thus, lower material and labor costs), and less need for sedation during bandage changes.8-10<\/sup><\/p>\n
MRD = moisture-retentive dressing; MWH = moist wound healing; WBC = white blood cell<\/p>\n","protected":false},"excerpt":{"rendered":"
How veterinarians should use different moisture-retentive dressings (MRDs) to heal wounds in dogs and cats.<\/p>\n","protected":false},"author":15,"featured_media":5570,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"iawp_total_views":11939,"footnotes":""},"categories":[359],"tags":[13],"class_list":["post-5385","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-july-august-2015","tag-peer-reviewed","column-features","clinical_topics-wound-management"],"acf":{"hide_sidebar":false,"hide_sidebar_ad":false,"hide_all_ads":false},"yoast_head":"\n
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- As granulation tissue forms<\/strong>, a less absorptive dressing is usually appropriate, and the interval between bandage changes may be increased up to 7 days<\/strong>.<\/li>\n
- During the inflammatory phase<\/strong> of healing, when exudate production is highest, a properly chosen MRD is typically changed every 2 to 3 days<\/strong>.<\/li>\n
- If the MRD has dried out and is stuck to the wound, inject sterile saline at the dressing\/wound interface to release the dressing and avoid a wet-to-dry effect.<\/li>\n<\/ul>\n
- Lift gel out if coherent (Figure 8<\/strong>), or gently lavage the gel out if not.<\/li>\n
- Conforming gauze roll:<\/strong> To stabilize the cast padding<\/li>\n
- Cast padding:<\/strong> To keep the dressing in contact with the wound, absorb excess moisture, and provide protection<\/li>\n
- Some MRDs have adhesive borders designed to adhere to the periwound skin and protect it from moisture (Figure 16<\/strong>).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
- When fitting the dressing to the wound, consider the wound\u2019s depth and contour:\n
- To help achieve the right fit, press the dressing on the wound and cut along the resulting imprint (Figure 11<\/strong>).<\/li>\n
- During the repair phase<\/strong> of healing, the chosen MRD should support function of growth factors and fibroblasts, endothelial cells, and epithelial cells<\/em> responsible for granulation, epithelialization, and contraction, while either removing exudate or adding moisture back to the wound, if needed.4,5,9,12<\/sup><\/li>\n<\/ul>\n
- The patient tolerates bandaging.<\/li>\n<\/ul>\n
- Delayed primary:<\/strong> Before granulation tissue formation<\/li>\n
- Epidermis:<\/strong> Epithelial cells on the skin edge then migrate onto the granulation tissue, which provides the oxygen, moisture, and surface required for epithelial cells to proliferate, cross the wound, and create a new epidermis (Figure 4<\/strong>).<\/li>\n
- Surgical debridement:<\/strong> Tissue removed by surgeon according to characteristics, such as color, texture, vascular supply, and temperature; selective on a macroscopic level.<\/li>\n
- Nonselective:<\/strong> Removal of both healthy and unhealthy tissues.<\/li>\n<\/ul>\n