The scientific principle of PediGuard is based on the electrical conductivity of tissue. Electrical conductivity is the property of a material to conduct an electrical current.
- Cortical bone has low conductivity
- Cancellous bone has medium conductivity
- Periosteum and blood have high conductivity
This parameter allows for discrimination between different materials in the vertebral body.
PediGuard’s bipolar tip can alert the surgeon prior to a breach during pedicle preparation by accurately analyzing the electrical conductivity of the surrounding tissues. The surgeon is informed in real time by changes in pitch and cadence of audio feedback and a flashing LED light.
- Cortical bone has low pitch, slow cadence
- Cancellous bone has medium pitch, medium cadence
- Periosteum and blood have high pitch, fast cadence