Artificial vessel and process for preparing the same

Claim 1

An artificial vessel comprising a vessel wall which consists essentially of a porous elastomer having a porosity of 75-87.5% by volume; said vessel wall being characterized over its entire thickness by a network structure formed by small pores having a maximum diameter of 1 to 100 μm which communicate with each other, said vessel wall being further characterized in that the partition walls which surround and form the communicating pores further contain small pores of a maximum diameter of less than 1 μm, said partition walls having a bulky structure as a result of a very small size of said very small pores, wherein the inner surface of said vessel wall has openings of a diameter of 1 to 100 μm formed by the communicating pores, and the outer surface of said vessel wall is in fluid flow communication with the inner surface of said vessel wall through the communicating pores, said vessel having a compliance of 0.1 to 0.8.