A process for surgical operations on a rectal/haemorrhoidal prolapse comprisesstages of realising, in the anal canal, at least a first circular stitching ata first portion of a haemorrhoidal prolapse； realising at least a second circularstitching in a second portion of the haemorrhoidal prolapse, and nearing thefirst circular stitching and the second circular stitching in order to createa constriction of the haemorrhoidal prolapse. The invention also relates toa device, preferably for actuating the process, which comprises a hollow divaricator(17) having a prevalent development direction along a longitudinal axis (Z)and being insertable in a patient's anal orifice. The device further exhibitsa window (29) defining an operational area and creating a communication betweena cavity (17b) internal of the divaricator (17) and a portion of haemorrhoidalprolapse. The device further comprises means for opening and closing (31) thewindow (29).
