STEC colitis mimicking acute severe colitis with life-threatening consequences: a case report.

Acute colitis is a common feature of infection with Shiga-toxin producing Escherichia coli (STEC) and can mimic acute severe ulcerative colitis. Early recognition is important as there is a risk of developing Shiga toxin-induced haemolytic uremic syndrome (STEC-HUS), defined by the triad of microangiopathic haemolytic anemia, thrombocytopenia and organ damage. In severe cases STEC-HUS can cause severe neurological complications and can be fatal. We present a patient with a medical history of refractory ulcerative colitis, where making the diagnosis of STEC-HUS was challenging since the initial clinical presentation was difficult to differentiate from a flare of ulcerative colitis. This case illustrates that STEC induced colitis can mimic acute severe ulcerative colitis. This finding is of utmost clinical importance because of the potential life-threatening complications of STEC-HUS. Therefore it should be excluded promptly in patients with acute severe ulcerative colitis by using multiplex-PCR assay on a faecal sample.

Use of the modified meek technique for the coverage of extensive burn wounds.

INTRODUCTION: Autologous split thickness skin grafting using meshing technique remains the preferred option for the management of deep dermal and full thickness burns. The limited donor site availability seen in patients with extensive burns, however, restricts use of the mesh grafting technique for skin expansion. Meek micrografting was developed to allow for greater expansion, and, therefore, more reliable treatment of extensive burns. This study aimed to present our outcomes using the Meek micrografting technique and identify risk factors for graft failure. METHODS: A retrospective review of patients admitted to our large academic hospital who were treated with the Meek micrografting technique from 2013 to 2022 was conducted. Patient demographics, surgical characteristics and outcomes were reported. Regression analyses were performed to identify factors that influence graft take and reoperation rate. RESULTS: A total of 73 patients with a mean age of 45.7 ± 19.9 years and mean burn size of 60.0 ± 17.8%TBSA, with 45.3 ± 14.9% TBSA being third degree burns, received Meek transplantation. The mean graft take after removal of the pre-folded polyamide gauze at the tenth post-operative day was 75.8 ± 14.7%. Pre-treatment with use of an allograft, longer waiting time between admission and Meek grafting and transplantation over a dermal matrix were identified as positive predictors for graft take, while age was established as a negative predictor. CONCLUSION: By examining the outcomes of the Meek micrografting technique in extensive burn wounds we identified that preconditioning of the wound bed, through allograft or negative pressure wound therapy application, positively correlates with improved outcomes, including higher graft take. At the same time, older age was seen to negatively correlate with graft take. Overall, Meek transplantation displays a favorable safety profile with promising outcomes. Future prospective studies and clinical trials can optimize the procedure and help establish it as the golden standard for extensive and complex burns.

Enzymatic Debridement With Nexobrid®Reduces Surgery in Laser Doppler Imaging-Confirmed Deep Burns.

In contrast to tangential excision, enzymatic debridement with NexoBrid® selectively removes non-viable tissue, allowing some deep dermal burn wounds to still heal conservatively. In this retrospective study, we investigated the reduction in surgery and associated scarring following enzymatic debridement in definitely deep burns as proven by laser Doppler imaging. One hundred two exclusively laser Doppler imaging-blue regions of interest where there was no doubt at all about the surgical indication, were selected for analysis in 32 patients treated with NexoBrid®. The total surface area of the 102 exclusively blue regions of interest was 5,086.4cm2. NexoBrid® resulted in a substantial reduction in the need for autografts as 1,986.9cm2 (39%) healed with conservative treatment. This corresponded with a significant reduction in patients (56.3%) requiring surgery. Exclusively laser Doppler imaging-blue regions of interest treated surgically with split thickness skin grafts required significantly more time to heal compared to conservative treatment (37.8±17.5 vs. 27.0±10.5 days). A very limited rate of hypertrophic scarring (16.7%) was observed. This is the first paper demonstrating a proven and significant reduction in the extent of autografting as well as in the number of surgical procedures after selective enzymatic debridement in objectively laser Doppler imaging-defined and therefore proven deep burns. Even after extended conservative treatment with prolonged healing times following NexoBrid®, hypertrophic scar formation was limited (5/54 regions of interest, 9.3%). Also in operated patients, the incidence of hypertrophic scarring following a strict regimen of aftercare was low (12/48 regions of interest, 25%).

À la différence de l'excision chirurgicale tangentielle, le débridement enzymatique au Nexobrid® ne s'intéresse qu'au tissu nécrosé ce qui permet la cicatrisation spontanée de certaines brûlures intermédiaires. Dans cette étude rétrospective, nous avons évalué la diminution des interventions chirurgicales (et des séquelles y afférant) en cas d'utilisation de l'excision enzymatique sur des brûlures affirmées comme profondes par Imagerie Laser- Doppler (ILD). Nous avons analysé 102 régions d'intérêt, apparaissant bleues à l'ILD chez 32 patients traités par Nexobrid®, représentant une surface totale de 5 086,4 cm2. Ceci a permis une cicatrisation spontanée de 1 986,9 cm2 (39% de l'ensemble et 56,3% chez les patients ayant dû être opérés). Les patients traités par excision- greffe sont restés significativement plus longtemps que ceux ayant cicatrisé spontanément (37,8 +/- 17,5 j VS 27 +/- 10,5). L'incidence globale des cicatrices hypertrophiques était basse (16,7%). Ceci est la première publication montrant une diminution significative de la surface greffée et du nombre d'interventions chirurgicales après l'utilisation d'une excision enzymatique chez des patients souffrant de brûlures définies comme profondes par ILD. Même après une cicatrisation spontanée longue après Nexobrid®, l'incidence des cicatrices hypertrophiques reste faible (5/54 régions d'intérêt - 9,3%) quand elle s'élève à 25% après excision- greffe (12/48).