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.
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.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
OTHER
Masking
NONE
Enrollment
50
Will be stimulating the pedicle screws utilizing three different pulse-width settings, 0.4 milliseconds, 0.2 milliseconds, and 0.05 milliseconds.
Dartmouth-Health
Lebanon, New Hampshire, United States
RECRUITINGCMAP response under three different pulse-width settings
Upon completion of the pedicle screw placements, each screw will be stimulated utilizing three different pulse-width settings, 0.4 milliseconds, 0.2 milliseconds, and 0.05 milliseconds. The stimulation intensity required to elicit a compound muscle action potential (CMAP) will be recorded for each pulse-width parameter. This is measured in microvolts (uV).
Time frame: Within operating room upon completion of pedicle screw placement. 1 day
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