Influence of sciatic nerve block combined with ultrasound-guided continuous femoral nerve block on stress responseelderly in patients undergoing unilateral total knee arthroplasty
JIANG Wei-qun TAO Xiao-san
Department of Anesthesiology,the Third Affiliated Hospital of Nanchang University,Jiangxi Province,Nanchang 330008,China
Abstract:ObjectiveTo study the influence of sciatic nerve block (SNB)combined with ultrasound-guided continuous femoral nerve block(CFNB)on stress responseelderly in patients undergoing unilateral total knee arthroplasty.Methods56 elderly cases underwent unilateral total knee arthroplasty by our hospital from March to October 2016 were selected and were divided into control group(general anesthesia)and observation group(SNB combined with ultrasound-guided CFNB).The level of hemodynamics and stress related hormones were monitored before anesthesia induction(T1),surgical resection(T2),30 min of operation(T3),at the end of surgery(T4)and postoperative 1 h(T5).ResultsMAP and HR level on T2of two groups were significantly lower than T1,the difference was statistically significant(P<0.05);MAP and HR level on T3and T5of the observation group were significantly lower than the control group at the same time,the difference was statistically significant(P<0.05).COR,AD and NE levels on T2,T3,T4and T5of the observation group were significantly lower than the control group at the same time,the difference was statistically significant(P<0.05).ConclusionSNB combined with CFNB is helpful to maintain hemodynamic stability and suppress stress response in elderly patients undergoing unilateral total knee arthroplasty.