System Manual

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Figure 4.20: Lead Impedance Check
1. Select the Check or Lead Impedance button (circled in Figure 4.20).
After the Check or Lead Impedance button is selected, the Lead impedance value is
shown (see Figure 4.23). For any value above 10,000 Ω (see Figure 4.21) or less than 250
Ω (see Figure 4.22), the “Warning!” screen informs the patient to contact their physician or
therapist to see if any further action needs to be taken.
CAUTION: Changes in Lead impedance are common; therefore, changes of even
several thousand ohms occur normally over time. Refer to the Microtransponder
®
Vivistim
®
Paired VNS
™
System Implantable Device Manual for Healthcare
Professionals for more information.
Figure 4.21: High Lead Impedance Notification