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Influence of electrocautery-induced electromagnetic interference on quantitative electroencephalographic monitoring of hypnosis during general anesthesia: comparison between the ADMS(R) and the BIS VISTATM

Authors
Kim, DH  | Yoo, JY  | Kim, JY  | Ahn, SH | Kim, S | Min, SK
Citation
Korean journal of anesthesiology, 71(5). : 368-373, 2018
Journal Title
Korean journal of anesthesiology
ISSN
2005-64192005-7563
Abstract
BACKGROUND: Hypnosis monitors analyze small-amplitude electrical signals transmitted from the brain that could be exposed to the electromagnetic field that occurs around the body during electrocautery (ECT). We investigated the influence of ECT on hypnosis monitoring during anesthesia.
METHODS: We simultaneously monitored BIS and uCON during 50 gynecologic oncology surgeries. During the episodes of ECT, we compared the absolute difference (a-Diff) between the baseline index and the most deviated index after ECT over either 30-60 s (ECT30-60) or more than 60 s (ECT > 60) between the monitors. We also investigated the bias and the limits of agreement between the monitors.
RESULTS: Between the two monitors, the a-Diff of ECT30-60 was 1.4 +/- 1.1 for the BIS, which was significantly greater than 0.6 +/- 0.9 for the uCON (P = 0.003), and the a-Diff of ECT > 60 was 16.5 +/- 8.2 for the BIS, which was also significantly greater than 1.4 +/- 1.3 for uCON (P < 0.001). The intra-monitor index differences showed that the BIS during ECT > 60 was significantly greater than that during ECT30-60 (P < 0.001), but the uCON showed no significant difference between ECT30-60 and ECT > 60 (P = 0.056). The estimated bias between the monitors was 6.3 +/- 9.8 and 95% limits agreement was -12.3 to 25.0.
CONCLUSIONS: Prolonged ECT intervention might lead to spurious estimations of quantitative EEG indexes. Therefore, hypnosis should be clinically assessed in combination with scrutinized judgment of relevant clinical symptoms and signs for hypnosis.
Keywords
DOI
10.4097/kja.d.18.27154
PMID
29684988
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Anesthesiology & Pain Medicine
Ajou Authors
김, 대희  |  김, 종엽  |  민, 상기  |  유, 지영
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