Intrauterine pressure catheter interface cable system

A method of performing a zeroing operation on an intrauterine pressure catheter system, the method comprising the steps of:

• providing interconnection between the intrauterine pressure catheter system and a monitoring system via the interface cable system, the interface cable system comprising:
• a first connector configured to provide electrical interconnection with the intrauterine pressure catheter system;
• a second connector configured to provide electrical interconnection with the monitoring system, the second connector housing power supply distribution circuitry and signal processing circuitry, the power supply distribution circuitry configured to receive an excitation voltage from the monitoring system when the second connector is coupled to the monitoring system to provide power to the power supply distribution circuitry and the signal processing circuitry, the power supply distribution circuitry being configured to generate at least one desired voltage from the excitation voltage to power the signal processing circuitry;
• a switching element configured to activate a zeroing operation of the intrauterine pressure catheter system for a period of time;
• an indicator disposed on the second connector and coupled to the power supply distribution circuitry and the signal processing circuitry;
• wherein the signal processing circuitry prevents the zeroing operation from being performed if an input voltage from the monitoring system exceeds a predetermined threshold voltage;
• at least one filter capacitor configured to filter out an alternating current component of the excitation voltage to generate a direct current signal;
• and
• at least one switched capacitor configured to double the direct current signal prior to the direct current signal being provided to an analog switch and a linear voltage regulator of the signal processing circuitry, wherein the signal processing circuitry shorts at least two pins on the analog switch if the input voltage from the monitoring system exceeds a predetermined threshold voltage;
• actuating the switching element;
• providing an indication that the switching element has been actuated, thereby indicating that the zeroing operation may be performed;
• and
• zeroing the intrauterine pressure catheter system.