*4.1.1 Triangulation*

This technique was described by Alexis Carrel in the 1902. His intention was to separate the posterior wall from the anterior, as he realised about the danger of transmural stitches. The technique employed three initial sutures, with 120° separation between each [25]. It was modified with the use of only two initial sutures at 120° or 150° distance, as the posterior side was then longer and also fell away (**Figure 3**). Finally, it was modified again to propose only two initial sutures at 180°. The rest of the anastomosis will be closed with simple sutures between the initial points [24, 26].
