Regional Anesthesia Techniques Flashcards
7 cards from real BCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Regional Anesthesia Techniques flashcards as text
Which nerve provides sensory innervation to the medial ankle and is targeted in a medial ankle block for foot surgery?
Answer: Posterior tibial nerve
The posterior tibial nerve, located posterior to the medial malleolus, provides sensory innervation to the plantar aspect of the foot and is the primary target of the medial ankle block.
What concentration of epinephrine is typically added to local anesthetic solutions for peripheral nerve blocks to prolong duration?
Answer: 1:200,000 (5 mcg/mL)
Epinephrine 1:200,000 (5 mcg/mL) is the standard concentration used as an adjunct to local anesthetics to prolong block duration through vasoconstriction.
A patient develops total spinal anesthesia after a paravertebral block. Which sign would FIRST indicate this complication?
Answer: Hypotension followed by apnea and loss of consciousness
Total spinal from inadvertent intrathecal injection causes rapid rostral spread, presenting as sudden hypotension progressing to apnea and loss of consciousness.
The erector spinae plane (ESP) block deposits local anesthetic deep to which structure?
Answer: Erector spinae muscle, superficial to transverse process
The ESP block deposits local anesthetic in the fascial plane deep to the erector spinae muscle and superficial to the transverse process, allowing cephalocaudal spread.
Which of the following is the MOST reliable indicator of correct epidural needle placement before catheter insertion?
Answer: Loss of resistance to saline or air with advancing needle
Loss of resistance (LOR) to saline or air is the primary technique for identifying the epidural space as the needle exits the ligamentum flavum.
In ultrasound-guided supraclavicular brachial plexus block, the brachial plexus appears as clusters of hypoechoic circles ('bunch of grapes') lateral to which structure?
Answer: Subclavian artery
At the supraclavicular level, the brachial plexus trunks/divisions appear lateral and superficial to the pulsatile subclavian artery in the ultrasound short-axis view.
A patient receives a spinal anesthetic and develops a sensory block to T4. Which hemodynamic change is MOST expected?
Answer: Significant hypotension due to sympathetic blockade of cardioaccelerator fibers
A T4 spinal block blocks the cardioaccelerator fibers (T1-T4), causing loss of sympathetic tone to the heart, resulting in bradycardia and significant hypotension.