The present invention, the ASD, is a mechanical device for anchoring hollow tube-like structures in the human body, such as blood vessels, bowels and ureters. It facilitates positioning needles or catheters in blood vessels and it prevents those from dropping out of the vessel or from "wandering off" in the vessel. The ASD can be used in every interventional medical situation for diagnostic or therapeutic purposes. The ASD is very easy to fix onto the vessel wall. Screwing is a fast technique saving operating time and requiring only basic microsurgical skills. The manufacturing is easy. It should be understood that the foregoing is illustrative and not limiting, and that modifications may be made by those skilled in the art, without departing from the scope of the invention.
