Abstract: The invention relates to an instrument for inserting a prosthesis tube connection between two blood vessels, especially arteries (12) or arterial areas, comprising a flexible, blood-impermeable connecting tube (11) which supports an expandable tubular metal screen (13) at at least one end, preferably only at one end, said screen being positioned at an angle to the longitudinal axis of the connecting tube and having a blood-tight inner lining and/or outer covering (15). Said screen extends in two opposite directions (11) from the end of the tube concerned, in a transversal T-bar. An expansion balloon (24) which can be expanded with a pressurised fluid is located inside the metal grid (13) and can be subjected to the action of the pressurised fluid through a pressurised fluid delivery tube (35) that is preferably guided through the connecting tube (11), for the purpose of expanding the metal screen (13).

Abstract: The invention relates to a prosthetic tube connection between two arteries or arterial regions inside the human body, comprising a flexible, blood-impermeable prosthetic tube having an appropriate length, whose ends are insertable in the arteries to be connected and connectable to said arteries in a blood-tight manner. According to the invention, a T-shaped tubular metal grid having substantially the diameter of the artery is disposed at least on one end of the tube forming an angle (&agr;) in relation to the longitudinal axis of the corresponding end area of the tube, said grid having a length such that it is insertable into the artery through an orifice made in said artery and extending in both directions of the artery from said orifice.