A Comparison of Interside Asymmetries of Lower Extremity Somatosensory Evoked Potentials in Anesthetized Patients with Unilateral Lumbosacral Radiculopathy.
- Author:
Qing YUE
1
;
Tyson HALE
;
Aaron KNECHT
Author Information
- Publication Type:Original Article
- Keywords: Superficial peroneal nerve; Posterior tibial nerve; Sural nerve; Somatosensory evoked potential; Radiculopathy
- MeSH: Cohort Studies; Evoked Potentials, Somatosensory*; Humans; Lower Extremity*; Peroneal Nerve; Prospective Studies; Radiculopathy*; Sural Nerve; Tibial Nerve
- From:Asian Spine Journal 2017;11(1):99-104
- CountryRepublic of Korea
- Language:English
- Abstract: STUDY DESIGN: Prospective cohort study. PURPOSE: This study was to investigate interside asymmetries of three lower extremity somatosensory evoked potentials (SSEPs) in anesthetized patients with unilateral lumbosacral radiculopathy. OVERVIEW OF LITERATURE: Although interside asymmetry is an established criterion of abnormal SSEP, little is known which of the lower SSEPs is more sensitive in detecting interside asymmetry in anesthetized patients. METHODS: Superficial peroneal nerve SSEP (SPN-SSEP), posterior tibial nerve SSEP (PTN-SSEP), and sural nerve SSEP were obtained in 31 lumbosacral surgery patients with unilateral lumbosacral radiculopathy, and compared with a group of 22 control subjects. RESULTS: The lumbosacral group showed significant larger interside asymmetry ratios of P37 latencies in SPN-SSEP and PTN-SSEP, and significant larger interside asymmetry ratio of P37-N45 amplitude in SPN-SSEP, when comparing with the control group. Within the lumbosacral group but not the control group, SPN-SSEP displayed significant larger interside asymmetry ratio in P37 latency. When referencing to the control group, more patients in the lumbosacral group displayed abnormal interside SPN-SSEP latency asymmetries which corroborated the symptom laterality. CONCLUSIONS: The data suggested that SPN-SSEP was more sensitive in detecting interside latency asymmetry in anesthetized patients.
