A medical equipment as a dilator catheter, a micro catheter or an atherectomy catheter

A medical device, the medical device (1); and hollow shaft centre (2), composed of multiple coils (21) is made of Single Raohuo, a of the hollow shaft centre (2) so the shape state-of-art part (3), a connecting hollow shaft centre (2) near the operating handle (4). At least of hollow shaft centre (2) inner surface and outer surface, and at least one of state-of-art part (3) inner surface and outer surface of the spiral convex strips protrusions (75). The is the state-of-art part (3) are resistance of the trouble of which can. The state-of-art part (3) is made of the linking airtight material, and a conical portion of the hollow shaft centre (2) far side part (31), the hollow shaft centre (2) is provided with a transparent part (10) and handle (4) is a radial direction to reduce the part (25), through which can of the card of the radial direction of the part (25).