Key result
Persistent intraoperative sensory evoked potential changes link to postoperative neurological changes, unlike transient ones.
Why the study?
Does monitoring sensory evoked potentials during surgery predict postoperative neurological function in anesthetized patients?
Observational (n=56)
Does monitoring sensory evoked potentials during surgery predict postoperative neurological function in anesthetized patients?
Answers are grounded in this paper and cite their sources.
Persistent changes in sensory evoked potentials during surgery are highly predictive of postoperative neurological changes, whereas transient changes are not.
Sensory evoked potentials (visual, auditory, and somatosensory) were recorded from 56 patients at the time of surgery to monitor neural function during critical portions of the operation. Fluctuations in latency and amplitude of the components occurred with changes in depth of anesthesia, blood pressure, irrigation, and neural tissue manipulation. Most of these changes were only transient. Permanent changes in evoked potentials occurred with decompression of neural tissue and prolonged retraction. Transient changes were not associated with any change in postoperative neurological function whereas changes in evoked potentials that persisted through the operation were highly likely to be associated with a postoperative change.
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Allen et al. (1981) conducted an observational in Surgically anesthetized patients (n=56). Sensory evoked potentials monitoring was evaluated on Postoperative neurological function change. Persistent intraoperative changes in sensory evoked potentials were highly likely to be associated with postoperative neurological changes, whereas transient changes were not.
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