Yuri Yi1, Daeyoung Heo, Hee-Jeong Son, Young Joo, Sang-Jin Lee, Byeongmun Hwang. 1. Department of Anaesthesia and Pain Medicine, Institute of Medical Sciences, Kangwon National University Hospital, School of Medicine, Kangwon National University, Chuncheon, Republic of Korea.
Abstract
OBJECTIVES: A prospective, randomized, double-blind study using bispectral index values to objectively quantify the sedative effect of high spinal anaesthesia in patients stratified according to age, and to determine whether sedative drugs are associated with additional adverse respiratory and haemodynamic effects in older patients. METHODS:Patients who were electively scheduled for lower limb or abdominal surgery were recruited and allocated into one of three groups according to their age and whether midazolam and fentanylwere used: younger (20-40 years); and older (61-80 years) with or withoutmidazolam and fentanyl intravenous infusion. RESULTS: The study recruited a total of 90 patients (n = 30 per group). Intraoperative bispectral index values were significantly lower than preoperative values in all groups. Patients in the older age group had significantly lower intraoperative bispectral index values than younger patients. Older patients were significantly more likely to experience respiratory depression (arterial oxyhaemoglobin saturation <90%) than younger patients. CONCLUSIONS: The sedative effect of high spinal anaesthesia is greater in older patients than in younger patients, with an increase in respiratory instability.
RCT Entities:
OBJECTIVES: A prospective, randomized, double-blind study using bispectral index values to objectively quantify the sedative effect of high spinal anaesthesia in patients stratified according to age, and to determine whether sedative drugs are associated with additional adverse respiratory and haemodynamic effects in older patients. METHODS:Patients who were electively scheduled for lower limb or abdominal surgery were recruited and allocated into one of three groups according to their age and whether midazolam and fentanyl were used: younger (20-40 years); and older (61-80 years) with or without midazolam and fentanyl intravenous infusion. RESULTS: The study recruited a total of 90 patients (n = 30 per group). Intraoperative bispectral index values were significantly lower than preoperative values in all groups. Patients in the older age group had significantly lower intraoperative bispectral index values than younger patients. Older patients were significantly more likely to experience respiratory depression (arterial oxyhaemoglobin saturation <90%) than younger patients. CONCLUSIONS: The sedative effect of high spinal anaesthesia is greater in older patients than in younger patients, with an increase in respiratory instability.
Authors: Tae Wan Lim; Yi Hwa Choi; Jong Yeop Kim; Jong Bum Choi; Soo Kyung Lee; Eun Ji Youn; Jun Suck Lee Journal: J Int Med Res Date: 2019-12-25 Impact factor: 1.671