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全身麻酔下後咽頭記録法を用いた体性感覚誘発電位

Format:
Article
Responsibility:
高田, 俊和 ; Takada, Toshikazu
Published:
新潟医学会, 1992-10-10
Publication info:
新潟医学会雑誌
ISSN:
0029-0440
Volume:
106
Number:
10
Start page:
941
End page:
948
Version:
publisher
Abstract:
The somatosensory evoked potentials (ppSEP) were recorded from the posterior pharynx in 15 surgical patients during general anesthesia, using the disc electrodes attached to endotracheal portex tube, and compared with the segmental spinal cord potentials (Seg-SCP) recorded from the posterior epidural space (PES) and scalp SEP. The peak latencies of P9 (9.4±0.7 ms) (mean±S.D), P13 (13.1±0.9 ms), N22 (21.0±2.1 ms) of ppSEP coincided with those of P1 (9.4±0.7 ms), N1 (13.0±0.8 ms), P2 (22.2±3.9 ms) of the Seg-SCP, respectively. The ppSEP with a reference electrode on the dorsal neck skin surface could be recorded most clearly as compared to those with reference electrodes at the earlobe or hand dorsum. The effect of isoflurane on the ppSEP was similar that of the Seg-SCP. The threshold and maximal stimulus intensity were also similar between the ppSEP and Seg-SCP. Thus, the origins of the P9, P13 and N22 components of ppSEP were thought to be the same to those of the P1, N1 and P2 of Seg-SCP, respectively. The results therefore suggest that the P9, P13 and N22 of the ppSEP reflect the incoming volleys through the roots, synchronized activities of the interneurons and primary afferent depolarization (PAD), respectively. The ppSEP might be applied more safely and simply than the Seg-SCP recorded from the PES for monitoring of spinal cord function during general anesthesia in the cases in which epidural placements of the electrodes are difficult or of contraindications. Read more
Authors:
URL:
http://hdl.handle.net/10191/40053

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