Skill 8-8 | Applying Negative-Pressure Wound Therapy | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Skill Variation: Applying a Single-Use Negative-Pressure Wound Therapy System Negative-pressure wound therapy (NPWT), also known as topical negative pressure, vacuum therapy, and vacuum-assisted closure (VAC), promotes wound healing and wound closure through the application of controlled, uniform suction (vacuum) to the wound surface (Apelqvist et al., 2017; Baranoski & Ayello, 2020; Hurd et al., 2017; Taylor et al., 2023). NPWT results in reduction in bacteria in the wound and the removal of excess wound fluid, while providing a moist wound healing environment (Taylor et al., 2023). The negative pressure results in mechanical tension on the wound tissues, stimulating cell proliferation, blood flow to wounds, and the growth of new blood vessels (Lalezari et al., 2017). NPWT also acts to pull the wound edges together. Refer to Figure 1 for an illustration of the principles of NPWT. A wound contact material is applied to fit the contours of the wound. There are various wound contact materials, including open-cell foam dressings or fillers and open-weave gauze dressing fillers (Milne, 2015). An airtight adhesive polyurethane drape that is permeable to water vapor, transparent, and bacteria proof or thin hydrocolloid is used to seal the wound and dressing (Apelqvist et al., 2017; Baranoski & Ayello, 2020). A small hole is made in the drape and a connection pad is applied over the hole, sealing the opening, and is connected to tubing and a vacuum source (Apelqvist et al., 2017). This system prevents air from entering the system from the external environment and provides for the application of the negative pressure. Excess wound fluid, small tissue debris, and infectious materials are removed through tubing into a collection container (Apelqvist et al., 2017; Benbow, 2016). A cycle of continuous, intermittent, or variable pressure (75 to 125 mm Hg) is used, depending on the particular device, the patient's condition, the location and type of wound, type of filler material, and the amount of drainage (Apelqvist et al., 2017; EPUAP, NPIAP, & PPPIA, 2019a; Schreiber, 2016). Refer to Figure 2 for examples of components of an NPWT system. NPWT is used in the management of complex and nonhealing wounds, including stage 3 and 4 pressure injuries as well as to prevent surgical-site infections in patients who are high risk for surgical-site infections (Baranoski & Ayello, 2020; EPUAP, NPIAP, & PPPIA, 2019a; Gantz et al., 2020; Lindsay, 2019). There are several modifications of conventional NPWT in use as well. Instillation and dwell-time therapy (NPWTi-d) is a modification of NPWT that involves retrograde instillation of a topical solution into the sealed wound using a computer-controlled programmable therapy unit with a period of dwell, followed by removal of the solution via the negative pressure cycles (Apelqvist et al., 2017; Kanapathy et al., 2020; Ludolph et al., 2018). Solutions used include normal saline, hypochlorous acid, and antimicrobials to enhance wound irrigation and cleansing and decrease bacterial colonization on the surface of the wound, potentially contributing to decreased time taken to complete wound healing (Baranoski & Ayello, 2020; Ludolph et al., 2018). Single-use NPWTs (sNPWTs) are cannister-free, battery-powered, disposable, and portable systems. The sNPWT dressing may integrate multiple layers within the dressing, including a silicone adhesive wound contact layer, foam layer, absorbent layer, and outer film layer as well as integrated tubing and tubing port/connector pad (Lindsay, 2019; Smith & Nephew, 2018). sNPWT systems handle fluid mainly through evaporation from the outer layer of the dressing and are therefore appropriate for smaller wounds and wounds with low-to-moderate exudate levels (Banasiewicz et al., 2019) (Figure 3). sNPWTs may be used for treatment of a wide variety of wounds, such as postoperatively on closed surgical incisions to reduce surgical-site complications, chronic wounds, chronic ulcers on the lower extremities, plastic surgery wounds, and skin grafts (Banasiewicz et al., 2019; Edwards et al., 2018; Kirsner et al., 2019; Lindsay, 2019). Refer to the Skill Variation Applying a Single-Use Negative-Pressure Wound Therapy System at the end of this skill. NPWT dressings are ideally changed based on the characteristics of the individual patient and the wound (EPUAP, NPIAP, & PPPIA, 2019a). Initial dressing changes may be necessary every 12 hours (wounds with heavy exudate) to 48 hours, then two to three times a week as indicated by the wound's response to the therapy, the manufacturer's specifications, and prescribed intervention (Baranoski & Ayello, 2020; EPUAP, NPIAP, & PPPIA, 2019a). The following skill outlines one procedure for one example of NPWT. The Skill Variation at the end of this skill outlines the procedure for one example of sNPWT. There are many manufacturers of NPWT systems. The nurse must be familiar with the components of and procedures related to the particular system in use for an individual patient.Delegation Considerations The application of NPWT is not delegated to assistive personnel (AP). Depending on the state's nurse practice act and the organization's policies and procedures, the application of NPWT may be delegated to licensed practical/vocational nurses (LPN/LVNs). The decision to delegate must be based on careful analysis of the patient's needs and circumstances as well as the qualifications of the person to whom the task is being delegated. Refer to the Delegation Guidelines in Appendix A. Equipment
Assessment Confirm the prescribed intervention for the application of NPWT. Check the patient's chart and question the patient about current treatments and medications that may make the application contraindicated. Assess the situation to determine the need for a dressing change. Confirm any prescribed interventions relevant to wound care and any wound care included in the plan of care. Assess the patient's level of comfort and the need for analgesics before wound care. Assess if the patient experienced any pain related to prior dressing changes and the effectiveness of interventions employed to minimize the patient's pain. Assess the current dressing to determine if it is intact. Inspect the wound and the surrounding tissue. Assess the location, appearance of the wound, stage (if appropriate), drainage, and types of tissue present in the wound. Measure the wound. Note the stage of the healing process and characteristics of any drainage. Also assess the surrounding skin for color, temperature, and edema, ecchymosis, or maceration. Actual or Potential Health Problems and Needs Many actual or potential health problems or issues may require the use of this skill as part of related interventions. An appropriate health problem or issue may include: Outcome Identification and Planning The expected outcomes to achieve when applying NPWT are that the application is accomplished without contaminating the wound area, without causing trauma to the wound, and without causing the patient to experience pain or discomfort, and the device functions correctly. Other outcomes that may be appropriate include the following: the appropriate and prescribed pressure is maintained throughout therapy, and the wound exhibits progression in healing. Implementation
Evaluation The expected outcomes have been met when the application of NPWT was accomplished without contaminating the wound area, causing trauma to the wound, or causing the patient to experience pain or discomfort; the device functions correctly; the appropriate and prescribed pressure was maintained throughout therapy; and the wound has exhibited progression in healing. Documentation Guidelines Record your assessment of the wound, including evidence of granulation tissue, stage (if appropriate), and characteristics of drainage. Include the appearance of the surrounding skin. Document the cleansing or irrigation of the wound and solution used. Document the application of the NPWT, noting the pressure setting, patency, and seal of the dressing. Describe the color and characteristics of the drainage in the collection chamber. Record pertinent patient and family/caregiver education and any patient reaction to this procedure, including the presence of pain and effectiveness or ineffectiveness of pain interventions. Sample Documentation 4/5/25 0800 NPWT dressing intact with good seal maintained, system patent, pressure setting 80 mm Hg. Purulent, sanguineous drainage noted in collection chamber and tubing. Surrounding tissue without edema, redness, ecchymosis, or signs of irritation. Patient verbalizes an understanding of use of the device and movement limitations related to the system.Developing Clinical Reasoning and Clinical Judgment Unexpected Situations and Associated Interventions
Special Considerations
Community-Based Care Considerations
Applying a Single-Use Negative-Pressure Wound Therapy System Single-use negative-pressure wound therapy (sNPWT) systems have a multi-layered wound dressing with integrated tubing and tubing port/connector pad (Figure 3 on p. 505). sNPWT systems are cannister-free, battery-powered, disposable, and portable. sNPWT systems manage fluid through evaporation from the outer layer of the dressing and are therefore appropriate for smaller wounds and wounds with low-to-moderate exudate levels (Banasiewicz et al., 2019). This Skill Variation outlines the general procedure for one example of sNPWT. There are many manufacturers of NPWT systems. The nurse must be familiar with the components of and procedures related to the particular system in use for an individual patient.
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