頸髄疾患のイヌにおける術中体性感覚誘発電位(SEP)モニタリングの有用性(外科学)

摘要

頸髄疾患のイヌ3頭に対して, 頸髄感覚伝導路機能を連続的にモニターする目的で, 尺骨神経刺激による体性感覚誘発電位(SEP)を手術中に測定した.全てのイヌにおいて, 安定したSEPを記録することができた.その頂点間振幅は, 頸髄への施術により減少し, 中断すると回復した.以上の結果より, 頸椎手術において手術操作が脊髄感覚機能へ及ぼす影響を, SEPにより即時的に確認できることが示唆された.We conducted somatosensory evoked potential (SEP) monitoring on 3 dogs with cervical spinal cord dysfunction caused by various diseases throughout operative procedures to examine whether the intraoperative SEP monitoring was effective for prediction of spinal cord conductive function. The SEP was recorded on the scalp via stimulation of the ulnar nerve. Stable SEP was recorded in all animals examined. Its amplitude was decreased by surgical manipulations of the regio vertebralis, but the amplitude gradually recovered once the manipulations were halted. The latency showed small variation throughout the operations. This evidence suggests that intraoperative SEP monitoring may provide continuous and instantaneous information regarding the functional integrity of the central nervous system.