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Anesthesia · single question

Which anesthetic cartridge is identified by a RED colour band?

  1. 3% mepivacaine plain
  2. 0.5% bupivacaine with 1:200,000 epinephrine
  3. 4% articaine with 1:100,000 epinephrine
  4. 2% lidocaine with 1:100,000 epinephrine
Show answer and explanation

Correct answer: D. 2% lidocaine with 1:100,000 epinephrine

  • A. 3% mepivacaine plain is LIGHT BLUE. It is the go-to plain agent when a vasoconstrictor must be avoided.
  • B. 0.5% bupivacaine with 1:200,000 epinephrine is BLUE — the long-acting agent for postoperative pain control.
  • C. 4% articaine with 1:100,000 epinephrine is GOLD.
  • D. CORRECT. RED is 2% LIDOCAINE WITH 1:100,000 EPINEPHRINE — the standard cartridge in most operatories. Each 1.8 mL cartridge contains 36 mg lidocaine and 0.018 mg epinephrine, which is why the cardiac dose limit of 0.04 mg epinephrine works out at roughly two cartridges.

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