Exemplary embodiments of the present disclosure are directed towards a physiologically acceptable visualisable contrast medium for the diagnosis of patency of conduits and method of its preparation comprising of an active ingredient comprising of a local anesthetic, whereby the active ingredient incorporated is 2% weight by weight of lidocaine hydrochloride a sterile mixture comprising of sodium chloride and water, whereby the strength of the sodium chloride incorporated is 0.9% weight by volume in a solution of water.
