Compared with general anaesthesia , a central neuraxial block may reduce the zero to 30-day mortality for patients undergoing surgery with intermediate to high cardiac risk ( level of evidence , moderate ) .
BACKGROUND Various beneficial effects derived from neuraxial blocks have been reported .
However , it is unclear whether these effects have an influence on perioperative mortality and major pulmonary/cardiovascular complications .
OBJECTIVES Our primary objective was to summarize Cochrane systematic review s that assess the effects of neuraxial blockade on perioperative rates of death , chest infection and myocardial infa rct ion by integrating the evidence from all such review s that have compared neuraxial blockade with or without general anaesthesia versus general anaesthesia alone for different types of surgery in various population s. Our secondary objective was to summarize the evidence on adverse effects ( an adverse event for which a causal relation between the intervention and the event is at least a reasonable possibility ) of neuraxial blockade .
Perioperative epidural analgesia and outcome after major abdominal surgery in high-risk patients.
In a primary analysis of a large recently completed r and omized trial in 915 high-risk patients undergoing major abdominal surgery , we found no difference in outcome between patients receiving perioperative epidural analgesia and those receiving IV opioids  , apart from the incidence of respiratory failure . Therefore , we performed a selected number of predetermined subgroup analyses to identify specific types of patients who may have derived benefit from epidural analgesia . We found no difference in outcome between epidural and control groups in subgroups at increased risk of respiratory or cardiac complications or undergoing aortic surgery , nor in a subgroup with failed epidural block ( all P > 0.05 ) . There was a small reduction in the duration of postoperative ventilation ( geometric mean [ SD ] : control group , 0.3 [ 6.5 ] h , versus epidural group , 0.2 [ 4.8 ] h ; P = 0.048 ) . No differences were found in length of stay in intensive care or in the hospital . There was no relationship between frequency of use of epidural analgesia in routine practice outside the trial and benefit from epidural analgesia in the trial . We found no evidence that perioperative epidural analgesia significantly influences major morbidity or mortality after major abdominal surgery
Compared with general anaesthesia , a central neuraxial block may reduce the zero to 30-day mortality for patients undergoing surgery with intermediate to high cardiac risk ( level of evidence , moderate ) .
BACKGROUND Various beneficial effects derived from neuraxial blocks have been reported .
However , it is unclear whether these effects have an influence on perioperative mortality and major pulmonary/cardiovascular complications .
OBJECTIVES Our primary objective was to summarize Cochrane systematic review s that assess the effects of neuraxial blockade on perioperative rates of death , chest infection and myocardial infa rct ion by integrating the evidence from all such review s that have compared neuraxial blockade with or without general anaesthesia versus general anaesthesia alone for different types of surgery in various population s. Our secondary objective was to summarize the evidence on adverse effects ( an adverse event for which a causal relation between the intervention and the event is at least a reasonable possibility ) of neuraxial blockade .