The relationship between lowest bispectral index value and age in high spinal anesthesia

고위 척추마취에서 마취심도감시장치를 이용한 나이에 따른 진정 정도의 비교

  • Hwang, Byeong-Mun (Department of Anesthesiology and Pain Medicine, Kangwon National University Hospital, Kangwon National University Medical School)
  • 황병문 (강원대학교 의학전문대학원 마취통증과)
  • Received : 2013.02.12
  • Accepted : 2013.05.09
  • Published : 2013.05.31


The aim of this study was to quantify the sedative effects of high spinal anesthesia, according to patient age, by also evaluating respiratory and hemodynamic changes. A prospective study was performed in 60 patients who were electively scheduled for lower limb or lower abdominal surgery. They were allocated into one of 2 groups according to their age: older age (51-80 years) and young age (20-50 years). In all groups, the lowest intraoperative bispectral index (BIS) values significantly lower than preoperative values. Patients in the older age group had significantly lower intraoperative BIS values than younger patients. The sedative effect of high spinal anesthesia is greater in older patients than in young patients, with an increase in respiratory instability. Our study showed a negative correlation between age and lowest BIS value; the lowest BIS value was reduced in older patients.


Age;Bispectral index;Sedation;Spinal anesthesia


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