• Acta Anaesthesiol Scand · Aug 2018

    Incidence and related factors for intraoperative failed spinal anaesthesia for lower limb arthroplasty.

    • E K Aasvang, M B Laursen, J Madsen, M Krøigaard, S Solgaard, P Kjaersgaard-Andersen, H Mandøe, T B Hansen, J U Nielsen, N Krarup, A E Skøtt, and H Kehlet.
    • The Lundbeck foundation centre for fast-track hip and knee replacement, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
    • Acta Anaesthesiol Scand. 2018 Aug 1; 62 (7): 993-1000.

    BackgroundSpinal anaesthesia is the preferred choice for total hip- and knee arthroplasty (THA/TKA), due to the claimed superior outcome profile, relative simple technique and without the need for advanced airway support. However, choosing and informing about spinal anaesthesia should also include the risk for intraoperative failed spinal anaesthesia with associated pain, discomfort and suboptimal settings for airway management. Small-scale studies suggest incidences from 1 to 17%; however, no multi-institutional large data exists on failed spinal incidence and related factors during THA/TKA, hindering evidence-based information and potential anaesthesia stratification.MethodsIn a sub-analysis, data from a prospective study on spinal anaesthesia for THA/TKA were examined for incidence of intraoperative conversion to general anaesthesia. Potential perioperative factors (age, gender, American Society of Anaesthesiologist (ASA) score, height, weight, BMI, procedure, bupivacaine dosage and duration of time from spinal administration until end of surgery) were analysed with logistic regression for relation to failed spinal anaesthesia.ResultsIn all, 1451 patients were included for analysis, whereof 57 (3.9%) had failed spinal anaesthesia. Spinal failure patients were significantly younger (61 vs. 67 years, P = 0.003), and operation time longer in the failed spinal group vs no-failure, respectively (133 vs. 89 min, P < 0.001). No significant differences were found with regard to bupivacaine volume, gender, ASA-score, height, weight, BMI or THA vs. TKA.ConclusionFailed spinal anaesthesia for THA and TKA is a relatively frequent occurrence and identification of risk patients is not feasible. These results should be considered when choosing anaesthesia and included in the information to patients.© 2018 The Acta Anaesthesiologica Scandinavica Foundation. Published by John Wiley & Sons Ltd.

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