Clinical Trial Comparing ERCP vs ERCP and Transmural Gall Bladder Drainage

Placing a PAL Axios (Boston Scientific) usually 15x10 mm or 10x10 mm to allow direct cholecystoscopy with a conventional gastroscope or transnasal gastroscope. The placement of the drainage will be performed in the same endoscopic act, by means of an Olympus® sectorial echoendoscope, assisted with X-rays, which allows puncturing the vesicle from the gastric antrum or the duodenal bulb to generate a cholecysto-gastrostomy or cholecysto-duodenostomy respectively. After the puncture of the vesicle from the most optimal anatomical point, it will be tutored with guidance and a Hot Axios® PAL 15x10 mm or 10x10 mm will be \*placed on it to generate the anastomosis between the aforementioned structures.