Abstract: The disclosure relates to a system for preparing an opening created on an organic wall, comprising: —a supporting body defining a longitudinal axis and having a proximal portion and a distal portion adapted for insertion through the opening; —external clamping elements deployable in an outwardly flaring arrangement relative to the supporting body and able to cover portions of an annular surface of said wall; and—biasing elements arranged to tighten and juxtapose said external clamping elements on said body in order to progressively deform said annular surface so as to shape on said wall a tubular portion extending along the longitudinal axis and form an anchoring clamp consisting of said external clamping elements.

Abstract: The invention relates to a system for performing an anastomosis between an organic wall having an opening and an organic hollow tube, comprising: a body inserted inside the tube and through the opening; external clamping elements defining with said body a tubular portion on the wall and forming an anchoring clamp; a device for connecting said tube and said tubular portion, comprising: suture elements connecting the external clamping elements to the body and each having a first end connected to a tightening device and a second end adapted for being retained on an external clamping element; and a suturing device adapted for moving the second end of the suture elements between a retracted configuration where it is located inside the tube, and an anchored configuration where it is retained on an external clamping element after passing through the tube.