Opacity technology

A catheter device comprising an elongated catheter body having a proximal end and distal end and a conduit within the catheter body;

• and a mixing chamber at the proximal end of the catheter body;
• wherein the mixing chamber has a first port for receiving a liquid and a second port in fluid communication with the conduit,
• wherein the mixing chamber further comprises an opacity enhancing substance prior to introduction of a liquid through the first port, or further comprises a third port adapted to receive the opacity enhancing substance prior to introduction of a liquid through the first port, and
• wherein the opacity enhancing substance is disposed in the mixing chamber or in a structure configured for placement in the mixing chamber via the third port so that the opacity enhancing substance in the mixing chamber can become suspended, dissolved or diluted with a liquid received from the first port to form an opacity enhancing liquid.