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ID 116568
タイトル別表記
Paradoxical increase in the PPG amplitude
著者
Kamiya, Satoshi Hiroshima University
Nakamura, Ryuji Hiroshima University
Saeki, Noboru Hiroshima University
キーワード
Photoplethysmography
sympathetic response
vascular stiffness
資料タイプ
学術雑誌論文
抄録
Background : Although an increase in sympathetic nerve activity is generally associated with a decrease in the photoplethysmography (PPG) amplitude, the present case study demonstrates that nociceptive stimuli, such as tracheal intubation, paradoxically induce an increase in PPG amplitude. To the best of our knowledge, this is the first study to capture an increase in the PPG amplitude in response to sympathetic nerve activation. Case presentation : A 73-year-old woman underwent open surgery. Following anesthesia induction, tracheal intubation was performed, which resulted in increased heart rate and raised blood pressure. While nociception usually decreases the PPG amplitude, the opposite was found. Conversely, the vascular stiffness K value, our research group’s unique monitoring method to quantify the strength of sympathetic activity, increased reflecting increased peripheral vascular resistance. Conclusions : We report a paradoxical case of increased PPG amplitude following tracheal intubation. It is important to note that the PPG amplitude does not always decrease with nociceptive stimuli.
掲載誌名
The Journal of Medical Investigation
ISSN
13496867
13431420
cat書誌ID
AA11166929
出版者
Tokushima University Faculty of Medicine
68
3-4
開始ページ
383
終了ページ
385
並び順
383
発行日
2021-08
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
出版社版
部局
医学系