Regional anesthesia and pain medicine
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Reg Anesth Pain Med · Sep 2011
Comparative StudyMinimum effective volume of lidocaine for ultrasound-guided supraclavicular block.
The aim of this study was to determine the minimum effective volume of lidocaine 1.5% with epinephrine 5 μg/mL in 90% of patients (MEV90) for double-injection ultrasound-guided supraclavicular block (SCB). ⋯ For double-injection ultrasound-guided SCB, the MEV90 of lidocaine 1.5% with epinephrine 5 μg/mL is 32 mL. Further dose finding studies are required for other concentrations of lidocaine, other local anesthetic agents and single-injection techniques.
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Reg Anesth Pain Med · Sep 2011
Patient experiences as knowledge for the evidence base: a qualitative approach to understanding patient experiences regarding the use of regional anesthesia for hip and knee arthroplasty.
It is reported that patients continue to have misgivings about regional anesthesia (RA) despite strong evidence to support its use for hip and knee replacement surgery. To date, no one has had an opportunity to study the experiences of patients who have undergone both types of anesthesia for these procedures. ⋯ These findings have important implications. First, many patients were surprisingly neutral about the procedure and seemed more fearful of anesthesia in general rather than of either technique specifically. This finding, combined with patient's influence by clinician preference, underscores the importance of physician support for RA. Some participants identified one of their misgivings about RA as being fear of being awake, which is consistent with the medical literature. Our findings also support the idea that from a patient's perspective, appropriate sedation while undergoing RA may be important.
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Reg Anesth Pain Med · Sep 2011
Proactive error analysis of ultrasound-guided axillary brachial plexus block performance.
Detailed description of the tasks anesthetists undertake during the performance of a complex procedure, such as ultrasound-guided peripheral nerve blockade, allows elements that are vulnerable to human error to be identified. We have applied 3 task analysis tools to one such procedure, namely, ultrasound-guided axillary brachial plexus blockade, with the intention that the results may form a basis to enhance training and performance of the procedure. ⋯ This study presents a formal analysis of (i) the specific tasks that might be associated with the safe and effective performance of the procedure and (ii) the most critical errors likely to occur as trainees learn to perform the procedure. Potential applications of these data include curricular development and the design of tools to teach and assess block performance.