Canadian journal of anaesthesia = Journal canadien d'anesthésie
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Randomized Controlled Trial
Adductor canal block with or without added magnesium sulfate following total knee arthroplasty: a multi-arm randomized controlled trial.
Postoperative analgesia following total knee arthroplasty (TKA) often includes intrathecal opioids, periarticular injection (PAI) of local anesthetic, systemic multimodal analgesia, and/or peripheral nerve blockade. The adductor canal block (ACB) provides analgesia without muscle weakness and magnesium sulphate (MgSO4) may extend its duration. The purpose of this trial was to compare the duration and quality of early post-TKA analgesia in patients receiving postoperative ACB (± MgSO4) in addition to standard care. ⋯ We found no analgesic benefit of a postoperative ACB, with or without added MgSO4, in TKA patients undergoing spinal anesthesia and receiving intrathecal morphine, an intraoperative PAI, and multimodal systemic analgesia.
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Randomized Controlled Trial
Investigating faculty assessment of anesthesia trainees and the failing-to-fail phenomenon: a randomized controlled trial.
A growing body of evidence has shown that supervisors may "fail to fail" trainees even when they have judged their performance unsatisfactory. This has significant implications for the implementation of a nationwide competency-based education model of residency training. The objective of this study was to determine the incidence of "failing to fail" clearly underperforming residents. ⋯ Though often discussed, this is the first study to quantitatively show that the "failing-to-fail" phenomenon likely occurs during residency training performance evaluations. Passing underperforming learners can potentially affect patient safety and result in severe personal consequences to the learner. The results indicate the need for better performance assessment training for faculty members.
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Intraoperative nerve dysfunction has been difficult to investigate because of its rarity and unpredictable occurrence. The diagnostic test attributes of nerve function monitors have not been clearly defined. This proof-of-concept study aimed to assess the feasibility of using brachial plexus blockade (BPB) in awake patients as an experimental model for nerve dysfunction to characterize the diagnostic test attributes of somatosensory evoked potentials (SSEPs). ⋯ This study found that BPB can produce sufficient differential nerve dysfunction to allow adequate evaluation of the diagnostic test attributes of SSEPs as a nerve monitor. The results of this study may stimulate further work on refining intraoperative nerve dysfunction models and diagnostic nerve function monitors.