Regional anesthesia and pain medicine
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Reg Anesth Pain Med · Sep 2015
ReviewAnatomy and Pathophysiology of Spinal Cord Injury Associated With Regional Anesthesia and Pain Medicine: 2015 Update.
In March 2012, the American Society of Regional Anesthesia and Pain Medicine convened its second Practice Advisory on Neurological Complications in Regional Anesthesia and Pain Medicine. This update is based on the proceedings of that conference and relevant information published since its conclusion. This article updates previously described information on the pathophysiology of spinal cord injury and adds new material on spinal stenosis, blood pressure control during neuraxial blockade, neuraxial injury subsequent to transforaminal procedures, cauda equina syndrome/local anesthetic neurotoxicity/arachnoiditis, and performing regional anesthetic or pain medicine procedures in patients concomitantly receiving general anesthesia or deep sedation. ⋯ Since publication of initial recommendations in 2008, new information has enhanced our understanding of 5 specific entities: spinal stenosis, blood pressure control during neuraxial anesthesia, neuraxial injury subsequent to transforaminal techniques, cauda equina syndrome/local anesthetic neurotoxicity/arachnoiditis, and performing regional anesthetic or pain procedures in patients concomitantly receiving general anesthesia or deep sedation.
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Reg Anesth Pain Med · Sep 2015
Randomized Controlled Trial Comparative StudyA Comparison of 2 Ultrasound-Guided Approaches to the Saphenous Nerve Block: Adductor Canal Versus Distal Transsartorial: A Prospective, Randomized, Blinded, Noninferiority Trial.
Saphenous nerve blocks can be technically challenging. Recently described ultrasound techniques have improved the success rate of saphenous nerve blocks, but randomized controlled trials comparing these ultrasound-guided techniques are lacking. We compared 2 common ultrasound-guided approaches for saphenous nerve block: saphenous nerve block at the adductor canal (ACSNB) versus block by the distal transsartorial (DTSNB) approach. ⋯ Ultrasound-guided block of the saphenous nerve at the adductor canal is not only noninferior but also superior to block at the distal transsartorial level in terms of success rate, with additional advantages of faster block onset time and better nerve visibility under ultrasound.
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Reg Anesth Pain Med · Sep 2015
Randomized Controlled Trial Comparative StudyContinuous Adductor Canal Versus Continuous Femoral Nerve Blocks: Relative Effects on Discharge Readiness Following Unicompartment Knee Arthroplasty.
We tested the hypothesis that, following unicompartment knee arthroplasty, a continuous adductor canal block decreases the time to reach 4 discharge criteria compared with a continuous femoral nerve block. ⋯ Compared with a continuous femoral nerve block, a continuous adductor canal block did not appreciably decrease the median number of hours to overall discharge readiness, yet did decrease the number of discrete days until discharge readiness. These results are applicable to only unicompartment knee arthroplasty and must be considered preliminary because of the limited sample size of this pilot study.
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Reg Anesth Pain Med · Sep 2015
Randomized Controlled Trial Comparative StudyAdductor Canal Block With 10 mL Versus 30 mL Local Anesthetics and Quadriceps Strength: A Paired, Blinded, Randomized Study in Healthy Volunteers.
Adductor canal block (ACB) is predominantly a sensory nerve block, but excess volume may spread to the femoral triangle and reduce quadriceps strength. We hypothesized that reducing the local anesthetic volume from 30 to 10 mL may lead to fewer subjects with quadriceps weakness. ⋯ Varying the volume of ropivacaine 0.1% used for ACB between 10 and 30 mL did not have a statistically significant or clinically relevant impact on quadriceps strength.
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Reg Anesth Pain Med · Sep 2015
ReviewPercutaneous Balloon Compression for Trigeminal Neuralgia: Imaging and Technical Aspects.
Trigeminal neuralgia attacks are among the most painful conditions known. Trigeminal neuralgias are hypothesized to be caused by neurovascular conflict at the trigeminal root entry zone in the prepontine cistern. A range of therapeutic options is available including open surgical microvascular decompression and several percutaneous ablative techniques (eg, radiofrequency rhizotomy and glycerol gangliolysis). ⋯ This operative approach has proven popular with neurosurgeons as it is considered to be technically easier to perform than other methods. Nevertheless, pain physicians might regard this technique as challenging, relatively risky, and requiring special expertise. Accordingly, in this imaging article, we describe our percutaneous balloon compression procedure, paying particular attention to the technical and radiological details.