Hall Ch10

Question 1

Tachyphylaxis with repeated injections of local anesthetics is caused by?

Answer 1

Dosing interval. Longer dosing intervals with pain between injections leads to tachyphylaxis. Short dosing intervals with no pain between injections does not lead to tachyphylaxis.

Question 2

Propofol can be used to treat what is the most common side effect of neuraxial opiates

Answer 2

Pruritus

Question 3

Early signs of digitalis toxicity

Answer 3

Loss of appetite, nausea, vomiting, pain in feet, vision disturbances, pain similar to trigeminal neuralgia

Question 4

Initial symptoms of local anesthetic toxicity

Answer 4

Lightheadedness, dizziness, perioral numbness and tinnitus

Question 5

Ratio of epidural to intrathecal dose of morphine is?

Answer 5

10:1

Question 6

Onset time for epidural morphine

Answer 6

30-60 min

Question 7

Peak effect time for epidural morphine

Answer 7

90-120 min

Question 8

Duration time for epidural morphine

Answer 8

12-24 hrs, same for spinal morphine

Question 9

Interscalene block has frequent sparing of what nerve?

Answer 9

Ulnar

Question 10

Ulnar nerve derives from what nerve roots

Answer 10

C8-T1