Exudates and Transudates

In 2004, a multidisciplinary expert panel convened at the Tucson Expert Consensus Conference (TECC) to determine appropriate use of negative pressure wound therapy as delivered by a Vacuum Assisted Closure device (V.A.C. THERAPY, KCI, San Antonio, Texas) in the treatment of diabetic foot wounds. These guidelines were updated by a second multidisciplinary expert panel at a consensus conference on the use of V.A.C. THERAPY, held in February 2006, in Miami, Florida. This updated version of the guidelines summarizes current clinical evidence, provides practical guidance, offers best practices to clinicians treating diabetic foot wounds, and helps direct future research. The Miami consensus panel discussed the following 12 key questions regarding V.A.C. (1) How long should V.A.C. THERAPY be used in the treatment of a diabetic foot wound? (2) Should V.A.C." THERAPY be applied without debriding the wound? (3) How should the patient using V.A.C. THERAPY be evaluated on an outpatient ba...

Wound exudate is all too often perceived as a clinical management problem. While this can be the case, it should be recognized that exudate does fulfill an important function in the healing process. Gradual acceptance of the benefits of moist wound healing, combined with the current goals of the 'ideal' moist environment, focuses attention on the role of exudate. This review is intended to define the components and functions of 'normal' exudate and differentiate it from abnormal exudate.

In 2004, a multidisciplinary expert panel convened at the Tucson Expert Consensus Conference (TECC) to determine appropriate use of negative pressure wound therapy as delivered by a Vacuum Assisted Closure device (V.A.C. THERAPY, KCI, San Antonio, Texas) in the treatment of diabetic foot wounds. These guidelines were updated by a second multidisciplinary expert panel at a consensus conference on the use of V.A.C. THERAPY, held in February 2006, in Miami, Florida. This updated version of the guidelines summarizes current clinical evidence, provides practical guidance, offers best practices to clinicians treating diabetic foot wounds, and helps direct future research. The Miami consensus panel discussed the following 12 key questions regarding V.A.C. (1) How long should V.A.C. THERAPY be used in the treatment of a diabetic foot wound? (2) Should V.A.C." THERAPY be applied without debriding the wound? (3) How should the patient using V.A.C. THERAPY be evaluated on an outpatient ba...

Clinical criteria for the identification of wound infection are regularly based on a list created by Cutting and Harding (1994). This list was established from empirical data generated in a large, multidisciplinary clinical practice, and is now widely accepted as a seminal article in wound care. Both Cutting (1998) and Gardner et al (2001) have conducted validation exercises on these wound infection criteria, based on the assumption that the criteria broadly apply to most wound types. Although many of the original criteria do apply across the spectrum of wound types, the major categories of wounds should be considered separately to avoid the possibility of overlooking the presence of infection. The focus of this article is a review of the published literature on wound infection criteria for acute and surgical wounds, diabetic foot ulcers, venous and arterial leg ulcers, pressure ulcers and burns. All known criteria for each wound type are presented, as well as an outline of the ongo...

Tissue damage analysis by traditional laboratory techniques is problematic. Proteomic analysis of exudates collected from affected tissue constitutes a powerful approach to assess tissue alterations, since biomarkers associated with pathologies can be identified in very low concentrations. In this study we proteomically explore the pathological effects induced by the venom of the viperid snake Bothrops asper in the gastrocnemius muscle of mice. Predominant proteins identified in the exudates included intracellular proteins, plasma proteins, extracellular matrix proteins and cell membrane-associated proteins. The presence of such proteins indicates cytotoxicity, plasma exudation, extracellular matrix degradation and shedding of membrane proteins. Some of these proteins may represent useful biomarkers for myonecrosis and microvascular damage. The effect of fucoidan, an inhibitor of myotoxic phospholipases A(2), and batimastat, an inhibitor of metalloproteinases, on the pathological effects induced by B. asper venom were also investigated. Fucoidan reduced the presence of intracellular proteins in exudates, whereas batimastat reduced the amount of relevant extracellular matrix proteins. The combination of these inhibitors resulted in the abrogation of the most relevant pathological effects of this venom. Thus, proteomic analysis of exudates represents a valuable approach to assess the characteristics of tissue damage in pathological models and the success of therapeutic interventions.

To evaluate the clinical features and outcomes of eyes with peripheral exudative hemorrhagic chorioretinopathy (PEHCR) simulating choroidal melanoma. Noncomparative case series. A total of 173 eyes in 146 patients. Retrospective chart review. Clinical features and outcome. All cases were referred for possible choroidal melanoma. The mean patient age was 80 years, 145 (99%) were Caucasian, and 98 (67%) were female. The main lesion had a mean diameter of 10 mm and mean thickness of 3 mm. The lesion was located temporally in 103 eyes (77%), involved 1 or 2 quadrants in 123 eyes (92%), and was located between the equator and the ora serrata in 119 eyes (89%). Features included subretinal hemorrhage in 134 eyes (78%), retinal exudation in 37 eyes (21%), retinal pigment epithelial (RPE) detachment in 48 eyes (28%), and sub-RPE hemorrhage in 45 eyes (26%). Peripheral RPE alterations or drusen were found in 120 ipsilateral eyes (69%) and 73 contralateral eyes (42%). Macular RPE alterations, drusen, or choroidal neovascularization was found in 83 ipsilateral eyes (48%) and 97 contralateral eyes (56%). After observation (mean 15 months), lesion regression or stability was found in 80 eyes (89%) and progression was found in 10 eyes (11%). PEHCR is a hemorrhagic retinal degenerative process that simulates choroidal melanoma.

In this paper, we propose a method for the automatic detection of exudates in digital fundus images. Our approach can be divided into three stages: candidate extraction, precise contour segmentation and the labeling of candidates as true or false exudates. For candidate detection, we borrow a grayscale morphology-based method to identify possible regions containing these bright lesions. Then, to extract the precise boundary of the candidates, we introduce a complex active contour-based method. Namely, to increase the accuracy of segmentation, we extract additional possible contours by taking advantage of the diverse behavior of different pre-processing methods. After selecting an appropriate combination of the extracted contours, a region-wise classifier is applied to remove the false exudate candidates. For this task, we consider several region-based features, and extract an appropriate feature subset to train a Naïve-Bayes classifier optimized further by an adaptive boosting techn...

To investigate factors associated with reduced visual acuity during long-term follow-up of patients with idiopathic central serous chorioretinopathy (ICSC). Retrospective consecutive case series that included patients with ICSC who were younger than 50 years of age at the time of initial examination and were followed up for > or =3 years. The mean follow-up for 101 involved eyes of 61 patients was 9.8 years (median, 8.0 years). Eyes were stratified into two groups based on visual acuity at the final examination: Group 1, visual acuity of 2040 or better; and Group 2, visual acuity of worse than 2040. Findings identified as potential risk factors for reduced vision at the final follow-up examinations for Group 1 versus Group 2 included the following: macular retinal pigment epithelium atrophy (90.8% versus 96.0%, respectively; P = 0.68); persistent pigment epithelial detachment or persistent subretinal fluid (5.3% versus 28.0%, respectively; P = 0.004); recurrences (39.5% versus 68.0%, respectively; P = 0.020); laser treatment (28.9% versus 32.0%, respectively; P = 0.80); and submacular choroidal neovascularization (0.0 versus 8.0%, respectively; P = 0.059). Factors associated with reduced visual acuity during long-term follow-up of patients with ICSC included persistent pigment epithelial detachment and/or subretinal fluid, recurrences, and submacular choroidal neovascularization.

Tissue damage analysis by traditional laboratory techniques is problematic. Proteomic analysis of exudates collected from affected tissue constitutes a powerful approach to assess tissue alterations, since biomarkers associated with pathologies can be identified in very low concentrations. In this study we proteomically explore the pathological effects induced by the venom of the viperid snake Bothrops asper in the gastrocnemius muscle of mice. Predominant proteins identified in the exudates included intracellular proteins, plasma proteins, extracellular matrix proteins and cell membrane-associated proteins. The presence of such proteins indicates cytotoxicity, plasma exudation, extracellular matrix degradation and shedding of membrane proteins. Some of these proteins may represent useful biomarkers for myonecrosis and microvascular damage. The effect of fucoidan, an inhibitor of myotoxic phospholipases A(2), and batimastat, an inhibitor of metalloproteinases, on the pathological ef...

Chronic venous leg ulcers are common, intractable and often recurrent, but care tends to be wound focused, potentially overlooking the significant impact the condition has on patients' lives. A systematic review was undertaken to explore the factors that impact on the quality of life of patients with chronic venous leg ulceration. Eligible articles published between 1990 and 2013 were identified via electronic searches of research databases (MEDLINE, CINAHL, BNI, EMBASE, PsycINFO, AMED and HMIC, Cochrane Collaboration database and Google Scholar). There were 23 studies (11 qualitative and 12 quantitative) that met the inclusion criteria. There were then the subject of a full review. The qualitative studies were collapsed into four core themes: physical, psychological, social implications and the nurse-patient relationship. The quantitative studies were grouped according to the tool applied. The review demonstrated that chronic venous leg ulcers impact negatively upon all areas o...

Effective management of wound healing is a considerable challenge for clinicians. Patients underlying condition, accurate assessment of the wound and exudates, as well as selection of an appropriate dressing is all important factors for success. A variety of dressings are available to the clinician for the management of exudates. Hydrofiber dressings are a relatively new concept, and can be very cost effective because they can be worn for several days at a time. This report will review clinical evidences on the use of Hydrofiber dressing for the management of epithelial lesions, deal with current knowledge on the mechanism of action of this compound towards the epithelial wound healing process, immunological aspects and will also discuss relevant patents.