Neuraxial Anesthesia and Cerebral Blood Flow
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Questions and Answers

Which of the following is true regarding the effect of epidural block on cerebral blood flow (CBF)?

  • Epidural block generally decreases CBF.
  • CBF is always increased by epidural block.
  • CBF is only affected by epidural block if the block is performed at the lumbar level.
  • CBF is autoregulated and not usually affected by epidural block. (correct)

    • Which of the following is true regarding the relationship between the level of sensory nerve block and sedation level?

  • The lower the level of sensory nerve block, the lower the sedation level. (correct)
  • The level of sensory nerve block has no effect on sedation level but only on anesthetic requirements.
  • The higher the level of sensory nerve block, the lower the sedation level.
  • There is no correlation between the level of sensory nerve block and sedation level.

    • Which of the following is true regarding the effect of higher-concentration local anesthetics (LAs) on MAC-sparing effect?

  • Higher-concentration LAs contribute to a greater MAC-sparing effect. (correct)
  • Higher-concentration LAs actually decrease MAC-sparing effect.
  • Higher-concentration LAs have no effect on MAC-sparing effect.
  • Data are insufficient to determine the effect of higher-concentration LAs on MAC-sparing effect.

    • Which of the following is true regarding the effect of opioid adjuvants on epidural block?

    <p>Opioid adjuvants improve postoperative pain scores but have no effect on volatile agent requirements.</p> Signup and view all the answers

    Which of the following is true regarding the effect of lidocaine epidural anesthesia on MAC of sevoflurane?

    <p>Lidocaine epidural anesthesia decreases MAC of sevoflurane by up to 50%.</p> Signup and view all the answers

    Which of the following is true regarding the effect of neuraxial anesthesia on anesthetic requirements?

    <p>Neuraxial anesthesia reduces anesthetic requirements.</p> Signup and view all the answers

    Which of the following is true regarding the correlation between sensory nerve block and sedation level?

    <p>Block of middle thoracic dermatomes results in greater sedative effects compared to block of lower lumbar segments.</p> Signup and view all the answers

    Which of the following is true regarding the effect of epidural block on volatile agent requirements?

    <p>Epidural block decreases volatile agent requirements.</p> Signup and view all the answers

    Which of the following is true regarding the effect of lidocaine epidural anesthesia on hypnotic requirements?

    <p>Lidocaine epidural anesthesia decreases hypnotic requirements.</p> Signup and view all the answers

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