Abstract: A drain bag support assembly that is non-removably coupled to a diagnostic urology table, which allows attachment of a drain pan assembly without removal of the drain bag support assembly. The assembly utilizes a shock mechanism and a locking mechanism to allow the urologist to modify the length of the drain bag assembly to fit their particular needs.The shock mechanism provides for dynamically shortening the length of the assembly by exerting horizontal pressure, while retaining horizontal rigidity. The locking mechanism provides for fixing the assembly to a desired length. The assembly can be placed in a fully closed configuration and stored underneath the diagnostic urology table. The assembly may also be placed in an extended configuration whereby a drain pan may be attached.