• Cochrane Db Syst Rev · Jan 2004

    Review Meta Analysis

    Anaesthesia for hip fracture surgery in adults.

    • M J Parker, H H G Handoll, and R Griffiths.
    • Orthopaedic Department, Peterborough District Hospital, Thorpe Road, Peterborough, Cambridgeshire, UK, PE3 6DA.
    • Cochrane Db Syst Rev. 2004 Jan 1(4):CD000521.

    BackgroundThe majority of people with hip fracture are treated surgically, requiring anaesthesia.ObjectivesTo compare different types of anaesthesia for surgical repair of hip fractures (proximal femoral fractures) in adults.Search StrategyWe searched the Cochrane Musculoskeletal Injuries Group specialised register (November 2003), MEDLINE (1996 to February week 2 2004), EMBASE (1988 to 2004 week 10) and reference lists of relevant articles.Selection CriteriaRandomised and quasi-randomised trials comparing different methods of anaesthesia for hip fracture surgery in adults. The primary focus of this review was the comparison of regional (spinal or epidural) anaesthesia versus general anaesthesia. The use of nerve blocks preoperatively or in conjunction with general anaesthesia is evaluated in another review. The primary outcome was mortality.Data Collection And AnalysisTwo reviewers independently assessed trial quality and extracted data.Main ResultsTwenty two trials, involving 2567 predominantly female and elderly patients, comparing regional anaesthesia with general anaesthesia were included. All trials had methodological flaws and many do not reflect current anaesthetic practice. Pooled results from eight trials showed regional anaesthesia to be associated with a decreased mortality at one month (56/811 (6.9%) versus 86/857 (10.0%)); however, this was of borderline statistical significance (relative risk (RR) 0.69, 95% confidence interval (CI) 0.50 to 0.95). The results from six trials for three month mortality were not statistically significant, although the confidence interval does not exclude the possibility of a clinically relevant reduction (86/726 (11.8%) versus 98/765 (12.8%), RR 0.92, 95% CI 0.71 to 1.21). The reduced numbers of trial participants at one year, coming exclusively from two trials, preclude any useful conclusions for long-term mortality (80/354 (22.6%) versus 78/372 (21.0%), RR 1.07, 95% CI 0.82 to 1.41).Regional anaesthesia was associated with a reduced risk of deep venous thrombosis (39/129 (30%) versus 61/130 (47%); RR 0.64, 95% CI 0.48 to 0.86). However, this finding is insecure due to possible selection bias in the subgroups in whom this outcome was measured. Regional anaesthesia was also associated with a reduced risk of acute postoperative confusion (11/117 (9.4%) versus 23/120 (19.2%), RR 0.50, 95% CI 0.26 to 0.95). There was insufficient evidence to draw any conclusions from a further four included trials, involving a total of 179 participants, which compared other methods of anaesthesia (a 'light' general with spinal anaesthesia; intravenous ketamine; nerve blocks).Reviewers' ConclusionsOverall, there was insufficient evidence available from trials comparing regional versus general anaesthesia to rule out clinically important differences. Regional anaesthesia may reduce acute postoperative confusion but no conclusions can be drawn for mortality or other outcomes.

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