Nerve Locators, Facial

Definition : Nerve locators designed to locate a facial nerve by applying an electrical stimulus with a probe and comparing muscle responses as the probe is moved. These devices typically include a peripheral nerve electrical stimulator, appropriate electrodes, sensors to detect muscle response (e.g., strain gauges, electrical sensors), and audible and/or visual displays. Most facial nerve locator stimulators generate rectangular waveform currents to stimulate nerve fibers and produce muscular contractions; some also produce triangular-waveform currents. Some units include monitoring capabilities to warn the surgeon when there is a risk of injury to a patient's facial nerve. Nerve locators are used during diagnosis and assessment of nerve function, to locate nerves during surgery (reducing the chance of accidental injury), and to monitor the progress of nerve regeneration after surgery.

Entry Terms : "Stimulators, Nerve Locator, Facial"

UMDC code : 16254

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