Venous valve incising blades, manufacturing method of the same and artery revascularization treatment using the same

A venous valve incising cutter comprising:

• a cutting teeth head having a partly spheroid shape,
• a guide,
• a coupling rod that has a smaller diameter than the diameter of the guide, and that couples to the cutting teeth head, and
• a wire that is connected to the guide at the side opposite the cutting teeth head,
• wherein the cutting teeth head, the guide, the coupling rod, and the wire are all aligned in a common rotational axis thereof,
• wherein the cutting teeth head has a posterior portion facing the guide and a fore portion on a reverse side thereof, the posterior portion having at least four cutting stabbers that are partly composed of the outer surrounding surface thereof and are evenly distributed on the outer surrounding surface of the cutting teeth head, each of the cutting stabbers having a substantially triangular pyramid shape of an outer side is a part of the outer surrounding surface of the posterior portion of the cutting teeth head, the outer side curving in toward the guide at an apex of the pyramid shape, and the apex having an angle at a cross section of the vertical plane that intersects the apex and the common rotational axis that is large enough to incise a valve without severing the valve, and
• wherein
• the fore portion has a shape of a hemispheroid of which a major radius along the common rotational axis is larger than a maximum radius perpendicular to the common rotational axis, and the outer surrounding surface of the posterior portion of the cutting teeth head is consistent with
• a shape of a hemispheroid of which a major radius along the common rotational axis is smaller than that of the major radius along the common rotational axis of the hemispheroid of the fore portion, or
• a shape of a hemisphere of which radius perpendicular to the common rotational axis equals that of the maximum radius perpendicular to the common rotational axis of the cutting teeth head, or
• the outer surrounding surface of the cutting teeth head is consistent with an egg-shape.