Patent ID: 6979337

Claim:
A blood vessel extroverting instrument used to turn an end of a blood vessel inside out, said instrument comprising: a contact portion to be brought into contact with the end of the blood vessel; a supporting portion on which said contact portion is supported; and an operating mechanism for increasing and reducing the diameter of said contact portion, wherein said contact portion comprises a ring portion formed of a wire-like member in the form of a substantially circular ring, said ring portion being supported on said supporting portion, and operation of the operating mechanism increasing and reducing the diameter of said ring portion; said supporting portion comprises a pair of arms each having a distal end, said ring portion being connected to the distal end of each arm, and the diameter of said ring portion being changeable by changing the distance between the distal ends of said pair of arms; and said ring portion is insertable into the blood vessel through the opening of the end of the blood vessel while being maintained in a reduced diameter state, and the diameter of said ring portion is thereafter adapted to be increased, whereby the end of the blood vessel is expanded and/or reversed by operating said operating mechanism.