Combined measurement of nerve root blood flow and electrophysiological values: intraoperative straight-leg-raising test for lumbar disc herniation

Spine
Yoshihiro TakamoriTatsuki Kobayashi

Abstract

A total of 15 patients with lumbar disc herniation at the L5-S1 disc level who underwent microendoscopic discectomy were examined. The nerve root blood flow and electrophysiological values were measured during an intraoperative straight-leg-raising (SLR) test. To investigate the relationships between nerve root blood flow changes and the electrophysiological values during an intraoperative SLR test. It is unknown how the electrophysiological values are affected by nerve root blood flow changes during an SLR test. We measured S1 nerve root blood flow and electrophysiologically evaluated the nerve root using the compound muscle action potentials (CMAPs) from the gastrocnemius muscle after S1 nerve root stimulation during an intraoperative SLR test. Subsequently, we analyzed the relationships between the nerve root blood flow changes and the electrophysiological values. Before discectomy, there were sharp decreases in the nerve root blood flow after 1 and 3 minutes of the SLR test (P < 0.001), and the amplitudes of the CMAPs deteriorated significantly (P < 0.001). Significant correlations were found between the decrease ratio for the nerve root blood flow during the SLR test and the deterioration ratio for the amplitude of the CMA...Continue Reading

References

Jan 1, 1989·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·K OlmarkerU Bagge
Feb 1, 1986·The Journal of Hand Surgery : Journal of the British Society for Surgery of the Hand·K Ogata, M Naito
Jan 1, 1984·Spine·B RydevikG Lundborg
Apr 5, 2002·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·U SchickH E Vitzthum

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