Korean J Anesthesiol > Volume 77(2); 2024 > Article |
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Funding
This study was partly supported by the Korea Health Technology R&D Project through the Korea Health Industry Development Institute, funded by the Ministry of Health & Welfare of the Republic of Korea (HR20C0026). The authors have reported that they have no relationships relevant to the contents of this paper to disclose.
Conflicts of Interest
Won-Jung Shin has been an editor for the Korean Journal of Anesthesiology since 2018. However, she was not involved in any process of review for this article, including peer reviewer selection, evaluation, or decision-making. There were no other potential conflicts of interest relevant to this article.
Values are presented as median (Q1, Q3) or number (%). PPG: photoplethysmography, ABP: arterial blood pressure, ICU: intensive care unit, VIS: vasoactive inotropic score, AC: amplitude modulation at respiratory frequency, DC: baseline modulation at respiratory frequency, CF: cardiac frequency, MV: mechanical ventilation. For intraindividual normalization of DC and AC parameters, all frequency domain parameters are divided by the amplitude density of the peak at the CF on the spectrum of each waveform analysis. Each normalized parameter was expressed as a percentage (DC% and AC%). *P < 0.05.