T-DOC Air-charged Catheters advance the art of pressure sensing with proprietary, "Air-Charged" pressure recording technology. Changes in physiologic pressure are transmitted through a microvolume of trapped air in the T-DOC catheter. T-DOC catheters eliminate the need for clumsy, external transducer set ups or expensive, finicky Microtip transducer catheters. Performing urodynamic procedures in today's cost-containment market demands a pressure sensing method that is easy-to-use, reliable, disposable and economical. The T-DOC "Air-Charged" catheter technology revolutionizes urodynamic testing with the most versatile and simple-to-use pressure sensing design on the market.