[原著］大動脈手術時の総腓骨神経刺激による体性感覚誘発電位(SEP)の安定性と信頼性の検討

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Somatosensory evoked potentials (SEP) recorded at the scalp by stimulation of the peroneal nerve at the knee were monitored during surgery of the thoracic or thoracoabdominal aortic aneurysm in 16 patients. Five SEP peaks (Nl, PI, N2, P2, N3) were identified in a majority of the subjects. Of the 5 peaks of the wave from, we found that N2 was the most stable point, and adopted potential differences between N2 and P2 to compare the amplitude change of SEP wave during surgery. The amplitude of the SEP wave was unchaanged after cross clamping of the aorta in 10 patients, and decreased in 4 patients. No postoperative neurological complications caused by ischemia were recognized in any patient. This suggested that SEP changes during surgery might indicate that there is reversible ischemic damage to the brain, spinal cord, or peripheral nerves, we concluded that the N2 is the most approriate peak assess the SEP.
琉球医学会,Ryukyu Medical Associationの論文