Local Anaesthetics

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Question 1 of 10

1. Question
Regarding adrenaline addition to local anaesthetics, which of the following is correct?
- Addition of adrenaline requires a lower volume of anaesthetic solution to be used compared with plain solutions
- Local anaesthetic with adrenaline should never be used in digits
- The maximum dose of lidocaine with adrenaline is 200mg in an adult
- Tissue necrosis is likely if adrenaline is used in a digital ring block
- Phentolamine can be used to reverse vasoconstrictive effects of adrenaline if complications occur
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Question 2 of 10

2. Question
Regarding local anaesthetics, which of the following is correct?
- Most LAs have an antibacterial action
- Arterial puncture during a nerve block means the procedure should be abandoned
- Methaemoglobinaemia should be treated with intralipid
- Nerve damage that occurs during local anaesthetic injection is normally permanent
- There are no contraindications to local anaesthetic eye drops
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Question 3 of 10

3. Question
Regarding local anaesthetics, which of the following is correct?
- After a maximum dose of lidocaine, a further dose can be given after one hour
- Consent is not required for a digital nerve block
- LAs should not be used in children under five years of age
- 40mls of 0.25% bupivacaine contains 200mg of bupivacaine
- In a 50kg person the maximum safe dose of lidocaine is 200mg
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Question 4 of 10

4. Question
Which of the following is a safe anaesthetic dose in a fit 70kg person?
- 40ml of 1% plain lidocaine
- 40ml of 0.5% bupivacaine
- 40ml of 2% lidocaine with adrenaline
- 40ml of 0.25% bupivacaine
- 40ml of 2% plain lidocaine
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Question 5 of 10

5. Question
Regarding local anaesthetics, which of the following is correct?
- In myelinated nerves, it is necessary to block more than one node of Ranvier
- Motor fibres are blocked before sensory fibres
- Infection may improve their effectiveness
- The effect at the receptor is caused by the unionised portion of the drug
- Lidocaine is an ester
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Question 6 of 10

6. Question
Regarding local anaesthetic administration, which of the following is correct?
- Young people never faint during it
- Sedation in children always helps
- Analgesia and sedatives should always be given intravenously to ensure a predictable response
- Ketamine should never be used in conjunction with local anaesthetic due to cardiovascular instability
- Entonox could be used to facilitate it
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Question 7 of 10

7. Question
Which of the following is a sign of severe local anaesthetic (LA) toxicity?
- Arrhythmia
- Haematoma formation
- Headache
- Tremor
- Paraesthesia
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Question 8 of 10

8. Question
Regarding type of local anaesthetic, which of the following is correct?
- For the same dose (mg) of local anaesthetic, a smaller volume of higher concentration is less toxic than a larger volume of lower concentration
- Bupivacaine is more toxic than lidocaine
- Lidocaine has good safety data in children under 1 year old
- Lidocaine is a potent vasoconstrictor
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Question 9 of 10

9. Question
Which of the following is a specific treatment for severe LA toxicity?
- Diazepam infusion
- Propofol infusion
- Stellate ganglion block
- Intralipid bolus injection
- Supplemental oxygen
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Question 10 of 10

10. Question
Regarding local anaesthetics, which of the following is correct?
- Addition of a buffer to lidocaine will increase the pain on injection
- Bupivacaine is shorter-acting than lidocaine
- Pre-treatment with EMLA will reduce pain on injection
- EMLA acts faster than amethocaine gel
- Warming LAs does not affect pain levels on injection
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Local Anaesthetics – Post Test

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