Figure 4.

Continuous pressure signal from Codman sensors before/after electrostatic discharge. The continuous pressure signals retrieved from Codman Microsensor are shown before and after electrostatic discharges (ESD's) for SensorID 4 (a), SensorID 38 (b), and SensorID 7 (c). Note that sudden changes in baseline pressure occurred for SensorID's 4 and 38, while SensorID 7 showed gradual drift of baseline pressure. The baseline pressure level (mmHg) is indicated on the y axis, and the time line on the × axis levels; the ESD is indicated by an arrow.