Subcutaneous tunnel device assembly for artificial blood vessel internal arteriovenous fistula

The invention belongs to the field of medical instruments, and particularly relates to a subcutaneous tunnel device assembly for artificial blood vessel internal arteriovenous fistula, which comprises a dilator, a guide wire and a sleeve. The two dilators are of a cylindrical structure with the two ends open, and each dilator is provided with a bendable section. The sleeve is provided with a sleeve cavity matched with the artificial blood vessel; the guide wire is arranged in a communicated inner cavity formed by the two dilators in an abutting mode. The bendable sections can enable the two dilators to be bent and deformed respectively to be matched with a preset path of a subcutaneous tunnel, the dilators are placed subcutaneously from skin incisions respectively, and then a continuously bent U-shaped subcutaneous tunnel can be established through end abutting, so that the skin incisions are reduced, the surgical injury is small, and concurrent infection can be prevented. The cannula can protect the artifici