Regional anesthesia and pain medicine
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Reg Anesth Pain Med · Sep 2014
Randomized Controlled TrialEfficacy of Ketamine as an Adjunct to Lidocaine in Intravenous Regional Anesthesia.
The addition of ketamine to lignocaine-based IVRA (Bier's block) significantly improved analgesia and patient satisfaction without increasing side effects.
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Reg Anesth Pain Med · Sep 2014
Review Meta AnalysisUltrasound-Guided Interventional Procedures in Pain Medicine: A Review of Anatomy, Sonoanatomy, and Procedures. Part V: Knee Joint.
Ultrasound-guided injection in pain medicine is emerging as a popular technique for pain intervention. It can be applied to the intra-articular injection of the knee joint. The first objective of this review was to describe and summarize the anatomy and sonoanatomy of the knee and associated structures relevant for intra-articular injection. The second objective was to examine the feasibility, accuracy, and effectiveness of injections as well as injection techniques.
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Reg Anesth Pain Med · Sep 2014
Evaluation of a task-specific checklist and global rating scale for ultrasound-guided regional anesthesia.
Checklists and global rating scales (GRSs) are used for assessment of anesthesia procedural skills. The purpose of this study was to evaluate the reliability and validity of a recently proposed assessment tool comprising a checklist and GRS specific for ultrasound-guided regional anesthesia. ⋯ This is the first study to evaluate the reliability and validity of a combined checklist and GRS for ultrasound-guided regional anesthesia using multiple observers and taking into account both absolute agreement and correlation in determining the ICC of 0.44 for interrater reliability. There was evidence to support construct validity.
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Reg Anesth Pain Med · Sep 2014
Randomized Controlled TrialUltrasound-Guided Continuous Interscalene Block: The Influence of Local Anesthetic Background Delivery Method on Postoperative Analgesia After Shoulder Surgery: A Randomized Trial.
Automated bolus delivery has recently been shown to reduce local anesthetic consumption and improve analgesia, compared with continuous infusion, in continuous sciatic and epidural block. However, there are few data on the influence of local anesthetic delivery method on local anesthetic consumption following interscalene blockade. This randomized, double-blind trial was designed to determine whether hourly automated perineural boluses (4 mL) of local anesthesia delivered with patient-controlled pro re nata (PRN, on demand) boluses would result in a reduction in total local anesthesia consumption during continuous interscalene blockade after shoulder surgery compared with continuous perineural infusion (4 mL/h) plus patient-controlled PRN boluses. ⋯ In continuous interscalene blockade under ultrasound guidance after shoulder surgery, automated boluses of local anesthetic combined with PRN boluses did not provide any reduction in local anesthetic consumption or rescue analgesia, compared with continuous infusion combined with PRN boluses.
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Reg Anesth Pain Med · Sep 2014
Intraneural or Extraneural: Diagnostic Accuracy of Ultrasound Assessment for Localizing Low-Volume Injection.
When one is performing ultrasound-guided peripheral nerve blocks, it is common to inject a small amount of fluid to confirm correct placement of the needle tip. If an intraneural needle tip position is detected, the needle can then be repositioned to prevent injection of a large amount of local anesthetic into the nerve. However, it is unknown if anesthesiologists can accurately discriminate intraneural and extraneural injection of small volumes. Therefore, this study was conducted to determine the diagnostic accuracy of ultrasound assessment using a criterion standard and to compare experts and novices in ultrasound-guided regional anesthesia. ⋯ Discrimination of intraneural or extraneural needle tip position based on an injection of 0.5mL is possible, but even experts missed 1 of 6 intraneural injections. In novices, the sensitivity of assessment was significantly lower, highlighting the need for focused education.