TY - JOUR
T1 - Preoperative ultra short-term entropy predicts arterial blood pressure fluctuation during the induction of anesthesia
AU - Fujiwara, Yoshihiro
AU - Ito, Hiroshi
AU - Asakura, Yusuke
AU - Sato, Yuko
AU - Nishiwaki, Kimitoshi
AU - Komatsu, Toru
PY - 2007/4
Y1 - 2007/4
N2 - BACKGROUND: In this study, we sought to determine whether the preoperative nonlinear index of heart rate variability, ultra short-term entropy (UsEn), could predict cardiovascular responses to the induction of general anesthesia. METHODS: UsEn was estimated by a linearized version of the nonlinear least squares method combined with the maximum entropy spectral analysis method (MemCalc method). Preoperative UsEn of 46 patients (ASA PS 1 or 2, aged 40-60 yr) without a history of hypertension was evaluated using the MemCalc method. Patients were assigned to two groups according to preoperative UsEn (Group LOW; UsEn <45, Group HIGH; UsEn ≥45). Anesthesia was induced with propofol, fentanyl and vecuronium bromide and endotracheal intubation was performed. Hemodynamic fluctuations during the induction of anesthesia were recorded and compared between the two groups. RESULTS: It was found that arterial blood pressure fluctuations during the induction of anesthesia were significantly greater in patients with a low UsEn. CONCLUSION: UsEn could predict arterial blood pressure fluctuations during the induction of anesthesia.
AB - BACKGROUND: In this study, we sought to determine whether the preoperative nonlinear index of heart rate variability, ultra short-term entropy (UsEn), could predict cardiovascular responses to the induction of general anesthesia. METHODS: UsEn was estimated by a linearized version of the nonlinear least squares method combined with the maximum entropy spectral analysis method (MemCalc method). Preoperative UsEn of 46 patients (ASA PS 1 or 2, aged 40-60 yr) without a history of hypertension was evaluated using the MemCalc method. Patients were assigned to two groups according to preoperative UsEn (Group LOW; UsEn <45, Group HIGH; UsEn ≥45). Anesthesia was induced with propofol, fentanyl and vecuronium bromide and endotracheal intubation was performed. Hemodynamic fluctuations during the induction of anesthesia were recorded and compared between the two groups. RESULTS: It was found that arterial blood pressure fluctuations during the induction of anesthesia were significantly greater in patients with a low UsEn. CONCLUSION: UsEn could predict arterial blood pressure fluctuations during the induction of anesthesia.
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U2 - 10.1213/01.ane.0000258756.41649.2d
DO - 10.1213/01.ane.0000258756.41649.2d
M3 - Article
C2 - 17377094
AN - SCOPUS:34047244721
SN - 0003-2999
VL - 104
SP - 853
EP - 856
JO - Anesthesia and Analgesia
JF - Anesthesia and Analgesia
IS - 4
ER -