Kevin Y. Woo

Increased bacterial burden and infection: the story of NERDS and STONES.

PURPOSE The purpose of this article is to provide practitioners with an overview of wound infection/inflammation and bacterial balance and to offer a guide to assessment and treatment of chronic wounds. TARGET AUDIENCE This continuing education activity is intended for physicians and nurses who assess and treat wound infections. OBJECTIVES After reading this article and taking this test, the participant should be able to: Discuss factors associated with infection of the chronic wound, including the concept of bacterial balance and burden. Identify signs of infection in the chronic wound and applicable diagnostic tests. Describe appropriate treatment for the infected chronic wound.

The role of moisture balance in wound healing.

PURPOSE To provide an overview of moisture balance and its importance in wound healing. TARGET AUDIENCE This continuing education activity is intended for physicians and nurses with an interest in wound care. OBJECTIVES After reading this article and taking the test, the reader should be able to: 1. Discuss the wound healing process and wound assessment. 2. Describe the types of dressings available and how they meet the needs of the individual patient.

Bacteriology, inflammation, and healing: a study of nanocrystalline silver dressings in chronic venous leg ulcers.

BACKGROUND: Healing of venous leg ulcers (VLUs) is often stalled despite compression therapy. Increased bacterial burden and chronic inflammation are 2 factors that may prevent these chronic VLUs (CVLUs) from healing. There is evidence that nanocrystalline silver dressings may reduce bacterial levels, decrease the chronic inflammatory response, and thus promote wound healing. OBJECTIVE: To determine the effects of a nanocrystalline silver barrier dressing on wound microflora, wound inflammation, and healing in CVLUs. METHOD: Stalled VLUs in 15 patients were managed using nanocrystalline silver dressings under 4-layer compression bandages. Paired skin biopsies at baseline and at an average of study week 6.5 were analyzed for bacteria and inflammatory infiltrates. Serum silver levels were monitored, and wound healing was assessed using planimetry. RESULTS: VLUs in 4 patients healed, and 8 other patients completed the 12-week study. There was a significant reduction in the log10 total bacterial count between baseline and final biopsies (P = .011). Greater numbers of lymphocytes were associated with an increased reduction of ulcer size at week 6.5 and final assessment at week 12 (P < .05). Heavy neutrophilic infiltration in skin biopsies at week 6.5 was associated with high bacterial counts and delayed healing (P = .037). The median reduction in ulcer surface area for all patients was 83.5%. Serum silver levels increased slightly, but values were within the normal range. CONCLUSION: A nanocrystalline silver dressing combined with 4-layer bandaging was safe and successful in promoting healing in stalled CVLUs. Healing was associated with a reduction in wound bacteria and neutrophilic inflammation with an associated persistent or high lymphocyte count, as determined by wound biopsy.

Dressing-related pain in patients with chronic wounds: an international patient perspective

This cross‐sectional international survey assessed patients’ perceptions of their wound pain. A total of 2018 patients (57% female) from 15 different countries with a mean age of 68·6 years (SD = 15·4) participated. The wounds were categorised into ten different types with a mean wound duration of 19·6 months (SD = 51·8). For 2018 patients, 3361 dressings/compression systems were being used, with antimicrobials being reported most frequently (n= 605). Frequency of wound‐related pain was reported as 32·2%, ‘never’ or ‘rarely’, 31·1%, ‘quite often’ and 36·6%, ‘most’ or ‘all of the time’, with venous and arterial ulcers associated with more frequent pain (P= 0·002). All patients reported that ‘the wound itself’ was the most painful location (n= 1840). When asked if they experienced dressing‐related pain, 286 (14·7%) replied ‘most of the time’ and 334 (17·2%) reported pain ‘all of the time’; venous, mixed and arterial ulcers were associated with more frequent pain at dressing change (P < 0·001). Eight hundred and twelve (40·2%) patients reported that it took <1 hour for the pain to subside after a dressing change, for 449 (22·2%) it took 1–2 hours, for 192 (9·5%) it took 3–5 hours and for 154 (7·6%) patients it took more than 5 hours. Pain intensity was measured using a visual analogue scale (VAS) (0–100) giving a mean score of 44·5 (SD = 30·5, n= 1981). Of the 1141 who reported that they generally took pain relief, 21% indicated that they did not feel it was effective. Patients were asked to rate six symptoms associated with living with a chronic wound; ‘pain’ was given the highest mean score of 3·1 (n= 1898). In terms of different types of daily activities, ‘overdoing things’ was associated with the highest mean score (mean = 2·6, n= 1916). During the stages of the dressing change procedure; ‘touching/handling the wound’ was given the highest mean score of 2·9, followed by cleansing and dressing removal (n= 1944). One thousand four hundred and eighty‐five (80·15%) patients responded that they liked to be actively involved in their dressing changes, 1141 (58·15%) responded that they were concerned about the long‐term side‐effects of medication, 790 (40·3%) of patient indicated that the pain at dressing change was the worst part of living with a wound. This study adds substantially to our knowledge of how patients experience wound pain and gives us the opportunity to explore cultural differences in more detail.

Special considerations in wound bed preparation 2011: an update

PURPOSE: To enhance the learners knowledge and competence in wound bed preparation. TARGET AUDIENCE: This continuing education activity is intended for physicians and nurses with an interest in skin and wound care. OBJECTIVES: After participating in this educational activity, the participant should be better able to: Assess wounds to classify them and determine prognosis. Apply evolving evidence regarding effective wound bed preparation and recommend patient-specific therapy. This article builds and expands upon the concept of wound bed preparation introduced by Sibbald et al 2000 as a holistic approach to wound diagnosis and treatment of the cause and patient-centered concerns such as pain management, optimizing the components of local wound care: Debridement, Infection and persistent Inflammation, along with Moisture balance before Edge effect for healable but stalled chronic wounds.

The biology of chronic foot ulcers in persons with diabetes

Diabetic foot ulcers constitute a major health problem and they are recalcitrant to healing due to a constellation of intrinsic and extrinsic factors. The purpose of this article is to review the potential biological mechanisms that deter healing and perpetuate inflammatory responses in chronic diabetes foot ulcers. The link between hyperglycemia induced oxidative stress and its negative impact on cellular functions are explained. Key evidence related to alteration in tissue perfusion, bacterial balance, sustained proteases and cytokines release, leukocyte function, and growth factor production at the local wound level are summarized. Copyright

Assessment and management of persistent (chronic) and total wound pain

Persistent (chronic) wound‐related pain is a common experience that requires appropriate assessment and treatment. It is no longer adequate for health care professionals to concentrate on the acute (temporary) pain during dressing change alone. The study provides useful recommendations and statements for assessing and managing total wound‐related pain for patients, health care professionals and other policymakers. The recommendations have been developed with the involvement of an interprofessional panel of health care professionals from around the world.

Debridement: a vital component of wound bed preparation.

PURPOSE To provide practitioners with an overview of debridement and its role in wound healing. TARGET AUDIENCE This continuing education activity is intended for physicians and nurses who assess and treat wounds. OBJECTIVES After reading the article and taking the test, the reader should be able to: 1. Discuss the physiologic process of wound healing and the rationale for debridement. 2. Describe evidence-based indications for and methods of debridement.

The Edge Effect: Current Therapeutic Options to Advance the Wound Edge

PURPOSE To provide practitioners with information about advanced treatment options related to the edge effect of chronic wounds. TARGET AUDIENCE This continuing education activity is intended for physicians and nurses with an interest in wound care. OBJECTIVES After reading the article and taking the test, the reader should be able to: Describe the DIME model and the normal wound healing process. Identify differences in the physiologic responses of chronic wounds from acute wounds. Discuss advanced treatment modalities for healing chronic wounds. ADV SKIN WOUND CARE 2007;20:99-117; quiz 118-9.

Reduction of Bacterial Burden and Pain in Chronic Wounds Using a New Polyhexamethylene Biguanide Antimicrobial Foam Dressing-clinical Trial Results

OBJECTIVE:A randomized controlled trial to evaluate the effectiveness of a polyhexamethylene biguanide (PHMB) foam dressing compared with a similar non-antimicrobial foam for the treatment of superficial bacterial burden, wound-associated pain, and reduction in wound size. SETTING AND PARTICIPANTS:This study was conducted in 2 wound healing clinics-a university hospital-based clinic and a community-based clinic. Forty-five chronic wound subjects, stratified to either foot or leg ulcers, were followed for 5 weeks. METHODS:A multicenter, prospective, double-blind, pilot, randomized controlled clinical trial with 3 study visits (Weeks 0, 2, 4) documented pain and local wound characteristics using NERDS and STONEES clinical criteria to determine superficial bacterial damage or deep/surrounding infection. RESULTS:The use of PHMB foam dressing was a significant predictor of reduced wound superficial bacterial burden (P = .016) at week 4 as compared with the foam alone. Pain reduction was also statistically significant at week 2 (P = .0006) and at week 4 (P = .02) in favor of the PHMB foam dressings. Polymicrobial organisms were recovered at week 4 in 5.3% in the PHMB foam dressing group versus 33% in the control group (P = .04). Subjects randomized to the PHMB foam dressing had a 35% median reduction in wound size by week 4, compared with 28% in the control group. CONCLUSIONS:PHMB foam dressing successfully reduced chronic wound pain and bacterial burden.