Anchoring screw device

Abstract

The present invention, the ASD, is a mechanical device for anchoring hollow tube-like structures in the human body, such as blood vessels and ureters. It facilates 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 nor limiting, and that modifications may be made by those skilled in the art, without departing from the scope of the invention.

1 - 6 . (canceled)  
   
   
       7 . Surgical screw-device adapted for being anchored onto a wall of a tube-liked structure inside the human body, such as for example a blood vessel or a ureter, the screw-device comprising a hollow screw with windings, between which in use the wall of the tube-like structure is anchored, characterised in that the screw-device further comprises non-cutting perforating means, fixed or removably attached to the hollow screw, for perforating the wall of the tube-like structure in such a way that passage of the winding of the hollow screw by screwing in enabled.  
   
   
       8 . Surgical screw-device according to  claim 7 , characterised in that the perforating means is formed by a front winding of the hollow screw, the front winding having a sharp and round end.  
   
   
       9 . Surgical screw-device according to  claim 8 , characterised in that the sharp and round end is bent inwardly and downwardly in an angle of 10 to 20 degrees with respect to the other windings.  
   
   
       10 . Surgical screw-device according to  claim 8 , characterised in that the sharp and round end is bent downwardly in an angle of  90  degrees with respect to the other windings.  
   
   
       11 . Surgical screw-device according to  claim 7 , characterised in that the screw-device further comprises a hollow structure, fixed onto the hollow screw.  
   
   
       12 . Surgical screw-device according to  claim 11 , characterised in that the hollow structure is provided with means for fixing a needle or a catheter onto the screw device.  
   
   
       13 . Surgical screw-device according to  claim 11 , characterised in that the hollow structure is filled with thrombostatic or haemostatic material.  
   
   
       14 . Surgical screw-device according to  claim 11 , characterised in that the perforating means comprise a removable head, removably attached to the hollow screw.  
   
   
       15 . Surgical screw-device according to  claim 14 , characterised in that the removable head comprises windings, each winding being wider than the previous one for expanding the perforation in the wall of the tube-like structure.  
   
   
       16 . Surgical screw-device according to  claim 14 , characterised in that the hollow screw comprises windings, each winding being wider that the previous one for expanding the perforation in the vessel wall made by the head.  
   
   
       17 . Surgical screw-device according to  claim 14 , characterised in that the removable head is attached to the hollow screw by means of anti-clockwise windings.  
   
   
       18 . Surgical screw-device according to  claim 7 , characterised in that the screw-device is made of inox material, or titanium, or super-elastic materials such as nitinol or synthetic materials, or resorbable materials.