Local anaesthesia in dermatology — Viva

Q1: Classification (2 min)

Amides versus esters: name agents, metabolism, and which class dominates injectable dermatologic surgery.

Q2: Mechanism and failure (2 min)

How do local anaesthetics block conduction? Why might an abscess field be hard to anaesthetise?

Q3: Dose maths (3 min)

Convert percentages to mg/mL. Give classical plain vs epinephrine lidocaine ceilings and a worked adult example.

Q4: Comfort and blocks (2 min)

Buffering, warming, needle size, slow injection. What is the modern view on epinephrine in digital blocks?

Q5: LAST (3 min)

Prodrome, seizures, cardiovascular collapse, immediate actions, lipid emulsion concept, clinic preparedness.