Predictors of the need for necrosectomy in patients with walled-off pancreatic necrosis treated with lumen apposition metal stents.

BACKGROUND AND AIMS: Endoscopic necrosectomy through lumen apposition metal stents (LAMS) is increasingly being used for complicated walled-off pancreatic necrosis (WOPN), but the need for necrosectomy after stent placement is not well understood. The aim of this study was to evaluate clinical, endoscopic, and radiologic predictors of the need for necrosectomy in patients treated with LAMS. METHODS: We retrospectively reviewed patients with WOPN treated with LAMS from 2014 to 2017. Necrosectomy was performed only in patients who had recurrent fever or hemodynamic instability during follow-up. Univariate and multivariate analyses were performed. RESULTS: We included 15 patients, 67% men and median age was 75 (54-76) years. Two (13%) presented adverse events, one immediate and one delayed. In the first case, the stent migrated to the gastric cavity during deployment but was relocated in the same procedure. In the second case, the patient presented bleeding on day 36 due to a pseudoaneurysm that was successfully treated with embolization. Clinical success was 100%, but five patients (33%) required endoscopic necrosectomy (4 mechanical and 1 irrigation) and one (7%) required surgical necrosectomy of distant collections. The percentage of necrosis in the collection detected in a previous CT scan (45 [35-66]% vs 10 [5-17]%) was the only factor to predict the need for necrosectomy in the multivariate analysis (OR 1.18 [1.01-1.39]). CONCLUSION: LAMS is efficient to treat WOPN but more than a third will need necrosectomy. The percentage of necrosis in the collection detected in the CT scan seems to predict the need for necrosectomy.

Use of electrosurgical units in the endoscopic resection of gastrointestinal tumors.

Electrosurgical units (ESUs) are indispensable devices in our endoscopy units. However, many endoscopists are not well-trained on their use and their physical bases are usually not properly studied or understood. In addition, comparative data concerning the settings that may be applied in different circumstances are scarce in the medical literature. Given that it is important to be aware of their strengths and risks, we conducted a review of the available information and research on this topic.

Use of electrosurgical units in the endoscopic resection of gastrointestinal tumors / Empleo de las unidades electroquirúrgicas en la resección endoscópica de neoplasias digestivas

Electrosurgical units (ESUs) are indispensable devices in our endoscopy units. However, many endoscopists are not well-trained on their use and their physical bases are usually not properly studied or understood. In addition, comparative data concerning the settings that may be applied in different circumstances are scarce in the medical literature. Given that it is important to be aware of their strengths and risks, we conducted a review of the available information and research on this topic

Las unidades electroquirúrgicas (UES) son dispositivos indispensables en nuestras unidades de endoscopia. Sin embargo, muchos endoscopistas no están bien entrenados en su uso y sus bases físicas generalmente no son estudiadas o comprendidas adecuadamente. Además, los datos comparativos sobre los ajustes que pueden aplicarse en diferentes circunstancias son escasos en la literatura médica. Dado que es importante conocer sus fortalezas y riesgos, realizamos una revisión de la información existente y la investigación sobre este tema