Anchoring screw device

Abstract

A mechanical device for anchoring hollow tube-like structures in the human body, such as blood vessels 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 device can be used in every interventional medical situation for diagnostic or therapeutic purposes. The device is very easy to fix onto the vessel wall. Screwing is a fast technique saving operating time and requiring only basic microsurgical skills.

What is claimed is: 
     
         1 . Surgical screw-device configured to be anchored onto a wall of a tube-like structure inside the human body, the screw-device comprising a hollow screw having a longitudinal axis passing through the hollow of the screw with a plurality of windings coaxially aligned with each other with respect to the longitudinal axis, wherein
 at least two of the windings of the hollow screw are loose from each other in an axial direction of the hollow screw along the longitudinal axis,   the at least two adjacent windings anchor and stably fix the wall of the tube-like structure between them without the need for occluding the tube-like structure by respectively retaining the inner and outer surfaces of the wall between the two adjacent windings,   a front winding of said windings has a sharp perforating end rounded to a point in a conical manner, for perforating the wall of the tube-like structure in such a way that passage of the windings of the hollow screw through the wall of the tube-like structure by screwing is enabled to anchor the screw-device to the wall of the tube-like structure, and   the two adjacent windings remain coaxially aligned with each other when the screw device is anchored to the wall.   
     
     
         2 . Surgical screw-device according to  claim 1 , wherein the sharp perforating end is rounded to a point for perforating the wall of the tube-like structure. 
     
     
         3 . Surgical screw-device according to  claim 2 , wherein the sharp perforating end is bent inwardly and downwardly in an angle of 10 to 20 degrees with respect to the other windings. 
     
     
         4 . Surgical screw-device according to  claim 2 , wherein the sharp perforating end is bent downwardly in an angle of 90 degrees with respect to the other windings. 
     
     
         5 . Surgical screw-device according to  claim 1 , wherein the screw-device further comprises a hollow structure fixed onto the windings of said hollow screw. 
     
     
         6 . Surgical screw-device according to  claim 5 , wherein the hollow screw is filled with thrombostatic or haemostatic material. 
     
     
         7 . Surgical screw-device according to  claim 1 , wherein the hollow screw is made of inox material, or titanium, or super-elastic materials or synthetic materials, or resorbable materials. 
     
     
         8 . Surgical screw-device according to  claim 1 , wherein the tube-like structure is a blood vessel or a ureter. 
     
     
         9 . Surgical screw-device configured to be anchored onto a wall of a tube-like structure inside the human body, the screw-device comprising a hollow screw having a longitudinal axis through the hollow of the screw with a plurality of windings coaxially aligned with each other with respect to the longitudinal axis, wherein
 a front winding of said plurality of windings has a sharp perforating end rounded to a point in a conical manner for perforating the wall of the tube-like structure in such a way that passage of the windings of the hollow screw by screwing is enabled to anchor the screw-device to the wall of the tube-like structure;   the front winding and at least one subsequent winding of the plurality of windings are loose from each other in axial direction of the hollow screw along the longitudinal axis and are configured to anchor and stably fix the wall of the tube-like structure between them without the need for occluding the tube-like structure by respectively retaining the inner and outer surfaces of the wall between two adjacent windings;   the hollow screw is fully open at a rear winding and inwardly from the plurality of windings, such that insertion of a needle or catheter through the screw-device into the wall of the tube-like structure is not obstructed; and   the two adjacent windings remain coaxially aligned with each other when the screw device is anchored to the wall.   
     
     
         10 . Surgical screw-device according to  claim 9 , wherein said front winding is a full spiral winding of 360 degrees. 
     
     
         11 . Surgical screw-device according to  claim 9 , wherein the tube-like structure is a blood vessel or a ureter. 
     
     
         12 . Surgical screw-device according to  claim 9 , wherein said sharp perforating end is rounded to a point for making a round perforation in the wall of the tube-like structure and subsequently expanding said round perforation without cutting. 
     
     
         13 . Surgical screw-device according to  claim 9 , wherein said sharp perforating end is bent inwardly and downwardly in an angle of 10 to 20 degrees with respect to the other windings. 
     
     
         14 . Surgical screw-device according to  claim 9 , wherein said sharp perforating end is bent downwardly in an angle of 90 degrees with respect to the other windings. 
     
     
         15 . Surgical screw-device according to  claim 9 , wherein the screw-device further comprises a hollow structure, such as a vessel or a catheter, fixed onto the windings of said hollow screw. 
     
     
         16 . Surgical screw-device according to  claim 9 , wherein the screw-device comprises a hollow tube which is attached to a rear winding of said plurality of windings and is filled with thrombostatic or haemostatic material that functions as a sponge against leakage. 
     
     
         17 . Surgical screw-device according to  claim 9 , wherein the hollow screw is made of inox material, or titanium, or super-elastic materials, or synthetic materials, or resorbable materials.