Lignocaine

Question 1

What is the presentation?

Answer 1

20mg/2ml OR 50mg/5mL; (both 1%) in a plastic ampoule

Question 2

How does it work?

Answer 2

Local anaesthetic - Sodium Channel blocker

Question 3

What is the onset?

Answer 3

1-2 minutes

Question 4

What are the indications?

Answer 4

Local anaesthetic for:
IV cannulation
IO infusion
Suturing
Finger thoracostomy in the conscious patient

Question 5

What are the contraindications?

Answer 5

Hypersensitivity

Question 6

What are the precautions

Answer 6

Adverse drug reactions are rare when lignocaine is used as a local anaesthetic and is administered correctly.

Question 7

What is the intradermal dose?

Answer 7

0.1mL

Question 8

What is the intraosseous dose for an adult?

What is the dose for a small adult/large child?

What is the dose for a child?

Answer 8

Small child: 10mg in 1mL
Small adult/large child: 20mg in 2mL
Adult: 40mg in 4mL (2 ampoules)
May be repeated at a second site if needed.

Question 9

What is the dose for finger thoracostomy

Answer 9

50mg in 5mL

Question 10

What are the special considerations/side effects?

Answer 10

Tinnitus, dizziness, anxiety, confusion, perioral numbness
Cardiovascular effects: Bradycardia, hypotension, dysrhythmias
CNS effects
Respiratory depression