An article prevents a drainage tube or catheter from being inadvertently moved, removed, or constricted. The article generally includes (i) a hollow conduit having a medial bend formed with an angle of between 45 and 135 degrees, and further having a lateral opening in a wall of the conduit, the opening exposing an interior space within the conduit, the wall having a means for securing a retainer in a selected position relative to the opening, (ii) a catheter positioned coaxially within the conduit, the catheter having a catheter wall, and (iii) the retainer removably secured within the opening wherein a tooth of the retainer penetratingly positioned within the catheter wall.