MAC Regional Anesthesia & Pain Management

Question 1

Which nerve block provides the broadest analgesia for hip replacement surgery?

Accepted Answer

Fascia iliaca compartment block

Answer

The fascia iliaca compartment block covers the femoral, lateral femoral cutaneous, and often obturator nerves, providing effective multi-nerve hip analgesia.

Question 2

What is the maximum safe dose of plain bupivacaine for peripheral nerve block in an adult?

Accepted Answer

2.5 mg/kg

Answer

The maximum safe dose of plain bupivacaine is 2.5 mg/kg due to its high cardiotoxicity risk compared to other local anesthetics.

Question 3

What is the first-line treatment for local anesthetic systemic toxicity (LAST)?

Accepted Answer

Intralipid 20% emulsion IV

Answer

Intravenous lipid emulsion (Intralipid 20%) is the specific antidote for LAST by acting as a lipid sink to sequester the local anesthetic.

Question 4

Which structure provides the loss of resistance during epidural needle placement?

Accepted Answer

Ligamentum flavum

Answer

Loss of resistance occurs as the needle passes through the dense ligamentum flavum into the epidural space.

Question 5

A spinal block that ascends to T4 may block which critical physiologic response?

Accepted Answer

Cardiac accelerator fibers

Answer

Cardiac accelerator fibers originate from T1-T4; a spinal block to this level can cause significant bradycardia and hypotension.

MAC - Maintaining Anesthesia Certification Practice Test

MAC - Maintaining Anesthesia Certification Practice Test

MAC Regional Anesthesia & Pain Management