Spring 25 - Farm - Local Anesthetics

Question 1

Procaine max single dose

Answer 1

7mg/kg
Pediatric 350 mg
Adults 600 mg

Question 2

Procaine (infiltration/Spinal)

Answer 2

• Infiltration: 0.25–1%
• Spinal: 50–200 mg

Question 3

Chloroprocaine max single dose (plain/Epi)

Answer 3

• 800 mg plain
• 1000 mg with epinephrine)

Question 4

Chloroprocaine (Infiltration/Epidural)

Answer 4

• Infiltration: 1%
• Epidural/peripheral block: 2–3%

Question 5

Tetracaine max single dose

Answer 5

20 mg
Highly potent and long-acting

Question 6

Tetracaine (Spinal dose/onset/duration

Answer 6

• Dose: 0.5–1%
• Onset: 3–5 minutes
• Duration: 2–3 hours, extended to 4–6 hours with epinephrine

Question 7

Cocaine max single dose

Answer 7

150 mg

Question 8

Benzocaine max single dose

Answer 8

200 mg

Question 9

Treatment of Methemoglobinemia induced by Benzocaine, after 200 - 300 mg administration

Answer 9

Treat with 1% methylene blue, 1–2 mg/kg IV over 20 minutes.

Question 10

Lidocaine max single dose (plain/epi)

Answer 10

• Plain 200 mg
• With Epi 500 mg

Question 11

Lidocaine (Infiltration/Spinal/Epidural dose)

Answer 11

• 0.5–1% for infiltration
• 100 mg Spinal/Epidural (controversial)

Question 12

Lidocaine dose for Ventricular ectopy

Answer 12

100–200 mg bolus → 1–4 mg/min infusion

Question 13

Prilocaine max single dose

Answer 13

600 mg

Question 14

Mepivicaine (do not use in pregnancy) max single dose (plain/epi)

Answer 14

• Plain 400 mg
• With Epi 500 mg

Question 15

Mepivicaine (Spinal/epidural/peripheral dose)

Answer 15

• Spinal 100 mg
• Epidural (1.5–2%): Onset in 10–15 minutes, duration 70–90 minutes
• Peripheral nerve block (1–1.5%): Duration 2–4 hours

Question 16

Bupivacaine max single dose (pain/epi)

Answer 16

• Plain 175 mg
• With Epi 225 mg

Question 17

Bupivicaine (Infiltration/spinal/epidural/peripheral doses)

Answer 17

• Infiltration: 0.25% into surgical wounds
• Spinal: Fast onset (<5 minutes), duration 1–4 hours
• Epidural: Ideal for labor and postoperative analgesia
  o <0.25% reduces motor block; 0.1% gives sensory analgesia with minimal motor
  effects
• Peripheral block: Duration 4–12 hours, may extend to 24 hours

Question 18

What three agents will cause vasoconstriction

Answer 18

• Ropivicaine
• Levobupivicaine
• Cocaine

Question 19

Etidocaine max single dose (plain/epi)

Answer 19

• Plain 300 mg
• With Epi 400 mg

Question 20

Ropivacaine max single dose

Answer 20

200 mg

Question 21

What two agents will cause methemoglobinemia

Answer 21

• Prilocaine
• Benzocaine