Pulse-width Modulation During Pedicle Screw Stimulation
Dartmouth-Hitchcock Medical Center
Summary
The overarching aim of this project is to modulate the pulse-width during stimulation of pedicle screws and record the response thresholds associated with each PWM setting. During this initial phase of the investigation, no further data will be collected.
Description
In vivo electrical stimulation of pedicle screws is a well-documented modality for evaluating potential breach of the pedicle wall. However, previous research has focused primarily on the stimulation threshold intensity required to elicit a neurophysiological response. Other stimulation parameters, such as pulse-width, remain uninvestigated. The goal is to obtain data on the pulse-width vs. CMAP relationship.
Eligibility
- Age range
- 18+ years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria: * A patient will be eligible for study participation once they have been booked for a surgery involving pedicle screw placement and intraoperative neuromonitoring. Exclusion Criteria: * The study excludes neonates, minors, pregnant women, prisoners and cognitively impaired patients.
Interventions
- Diagnostic TestPulse width modulation
Will be stimulating the pedicle screws utilizing three different pulse-width settings, 0.4 milliseconds, 0.2 milliseconds, and 0.05 milliseconds.
Location
- Dartmouth-HealthLebanon, New Hampshire