Treatment of chronic ulcers

Chronic ulcers (CUs) are a major cause of morbidity and mortality with increasing prevalence, in part due to the ageing population, and an increase of risk factors such as diabetes and obesity. CUs are caused by numerous diseases including venous dysfunction, diabetes mellitus, infections, peripheral neuropathy, pressure, and atherosclerosis. The current standard therapy for CUs includes compression, surgical débridement, infection control, and adequate wound dressings. As a high percentage of CUs do not adequately heal or quickly relapse with standard treatments, additional therapeutic approaches are pursued, termed “advanced wound care therapies”. Here, an overview on commonly applied therapies lacking significant evidence for wound healing is reviewed, followed by therapies with significant evidence supporting the routine use in the treatment of CUs, and a short outlook in a possible future wound treatment landscape.

To give a résumé, the presented literature reveals that most of the commonly applied topical and advanced ulcer treatments largely lack solid scientific evidence for the induction or acceleration of wound healing. Surprisingly only “classical” treatments such as wound cleansing, débridement and compression have significant evidence. Novel approaches such as bilayered skin reconstructs, cell suspensions or extracorporal shock waves seem promising. Considering the increasing number of ulcer patients, there is a strong need for further basic research to fully understand all factors involved in wound development and healing of the various ulcer pathophysiologies, and the urgent need for prospective clinical trials comparing the various treatment options.

Characteristic skin changes in CVI

Im phlebologischen Alltag ist die CVI aufgrund der sie typischerweise begleitenden Stadien-abhängigen Hautveränderungen häufig eine Blickdiagnose, die für die therapeutische Entscheidungsfindung durch apparative Diagnostik bestätigt und spezifiziert wird. Gerade im Hinblick auf die beiden häufigsten Stadieneinteilungen der CVI (nach Widmer bzw. der CEAP-Klassifikation) spielt die klinische Erscheinung eine wesentliche Rolle. Dieser Artikel gibt einen Überblick über die charakteristischen Hautveränderungen der unterschiedlichen Stadien der CVI und soll den klinischen Blick für die Diagnose der CVI schulen.

Extracorporal Shock Waves Activate Migration, Proliferation and Inflammatory Pathways in Fibroblasts and Keratinocytes, and Improve Wound Healing in an Open-Label, Single-Arm Study in Patients with Therapy-Refractory Chronic Leg Ulcers

Background/Aims: Chronic leg ulcers (CLUs) are globally a major cause of morbidity and mortality with increasing prevalence. Their treatment is highly challenging, and many conservative, surgical or advanced therapies have been suggested, but with little overall efficacy. Since the 1980s extracorporal shock wave therapy (ESWT) has gained interest as treatment for specific indications. Here, we report that patients with CLU showed wound healing after ESWT and investigated the underlying molecular mechanisms. Methods: We performed cell proliferation and migration assays, FACS- and Western blot analyses, RT-PCR, and Affymetrix gene expression analyses on human keratinocytes and fibroblasts, and a tube formation assay on human microvascular endothelial cells to assess the impact of shock waves in vitro. In vivo, chronic therapy-refractory leg ulcers were treated with ESWT, and wound healing was assessed. Results: Upon ESWT, we observed morphological changes and increased cell migration of keratinocytes. Cell-cycle regulatory genes were upregulated, and proliferation induced in fibroblasts. This was accompanied by secretion of pro-inflammatory cytokines from keratinocytes, which are known to drive wound healing, and a pro-angiogenic activity of endothelial cells. These observations were transferred “from bench to bedside”, and 60 consecutive patients with 75 CLUs with different pathophysiologies (e.g. venous, mixed arterial-venous, arterial) were treated with ESWT. In this setting, 41% of ESWT-treated CLUs showed complete healing, 16% significant improvement, 35% improvement, and 8% of the ulcers did not respond to ESWT. The induction of healing was independent of patient age, duration or size of the ulcer, and the underlying pathophysiology. Conclusions: The efficacy of ESWT needs to be confirmed in controlled trials to implement ESWT as an adjunct to standard therapy or as a stand-alone treatment. Our results suggest that EWST may advance the treatment of chronic, therapy-refractory ulcers.