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Questions related to sciatic nerve blocks, anesthesia agents, and patient management during and after nerve blocks. Topics cover ultrasound guidance, nerve stimulation, pharmacokinetics, and complications.
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Which of the following statements regarding adjuvants to local anesthetics is FALSE? A. Adjuvants such as dexamethasone and dexmedetomidine have been shown to preferentially extend the duration of peripheral nerve block at the lumbar plexus when compared to the brachial plexus B. For the adjuvant clonidine, the number needed to harm (NNH) with regards to sedation, bradycardia, and dizziness is less than 15. C. With regards to extension of duration of analgesia evidence suggests that intravenous dexamethasone is comparable to perineural dexamethasone. D. Epinephrine is generally regarded as a marker of intravascular injection, rather than an extender of duration of analgesia for long-acting local anesthetics.
Performing a femoral nerve block at the distal aspect of the femoral triangle (8-12cm below the inguinal crease) with lower local anesthetic volumes has a greater likelihood of anesthetizing which of the following branches of the femoral nerve? A. Nerve to vastus intermedius muscle B. Nerve to vastus medialis muscle C. Saphenous nerve D. b and c
Which of the muscles surrounding the femoral nerve (at the inguinal crease) is the asterisk denoting? A. pectineus muscle B. sartorius muscle C. iliopsoas muscle D. adductor brevis muscle