A device for forming an anastomosis of blood vessels or ducts comprises:
first and second engagement structures (7, 10; 35) for respectively
engaging a first end portion (2) of a blood vessel (1) or of a prosthesis
and a second end or side portion (4, 4') of the blood vessel (1) or
prosthesis; and a mechanism (14, 14') for reciprocally connecting the
first and second engagement structures. The first engagement structure
(7, 10) comprise one or more piercing elements (6) adapted to only
partially penetrate the side wall of the blood vessel (1) so as to avoid
direct contact between the elements (6) and the blood inside the vessel
or prosthesis.
