Body worn physiological sensor device having a disposable electrode module

1. A method for providing high voltage circuit protection for a patient monitor, the method comprising:

providing a substrate that supports one or more electrical connections to a patient's body;

determining a print pattern and thickness of a first material having a first resistivity to be printed on the substrate;

determining a print pattern and thickness of a second material having a second resistivity to be printed on the substrate;

printing the first material onto the substrate; and

printing the second material onto the substrate wherein at least part of the second the material overlays the first material.

2. The method of claim 1 , wherein both determining a print pattern and thickness of both the first and second materials comprise including a filleted section.

3. The method of claim 1 , wherein both determining a print pattern and thickness of both the first and second materials comprise determining a print pattern and thickness of both the first and second materials to achieve a total resistance value.

4. The method of claim 1 , wherein both determining a print pattern and thickness of both the first and second materials comprise the further steps of determining a print pattern and thickness of both the first and second materials to achieve a spacing between two or more electrical traces of the print pattern, and applying an insulating layer after the step of printing of the second material.

5. The method of claim 1 , the method further comprising:

providing an ECG monitor having a programmed microprocessor and a plurality of electrical connections to measure patient heartbeat signals;

filtering the measured heartbeat signals with an analog high pass filter having an analog high pass cutoff frequency;

removing the effects of the analog high pass filter with a digital inverse filter algorithm resulting in substantially unfiltered heartbeat signals;

filtering the substantially unfiltered heartbeat signals digitally using a digital filter having a digital high pass filter cutoff frequency lower than said analog cutoff frequency.

6. The method of claim 5 , wherein filtering the measured heartbeat signals with an analog high pass filter comprises filtering the measured physiological signals with an analog high pass filter having a 0.5 Hz analog high pass cutoff frequency.

7. The method of claim 5 , wherein filtering the substantially unfiltered heartbeat signals digitally comprises filtering the substantially unfiltered heartbeat signals digitally using a digital filter having a digital 0.05 Hz high pass filter cutoff frequency.