Topic 17 - Local Anaesthetic Flashcards
1
Q
Define anaesthesia
A
Loss of sensation/pain
2
Q
Define local anaesthesia
A
loss of sensation to specific anatomical area
3
Q
What is the difference between local and general anaesthesia?
A
General - pt unconscious
LA - patient lucid and can commnuicate
4
Q
What is LA used for in dentistry?
A
To provide analgesia and to enable surgical procedures to be undertaken.
5
Q
What ways are there of giving anaesthesia in dentistry?
A
- Cooling effect of topical ethyl chloride 8-10 degrees
- Pressure such as using mirror handle can overstimulate the nerves and lead to anaesthesia
- Radiofrequency ablation can result in irreversible blockade
6
Q
What modes of administration are there for LA?
A
Topical - benzocaine gel used on gingiva
Subcutaneous - infiltrating skin of cheek before excising a BCC
Epidural - child birth or hip/knee replacement
Nerve Block - Injecting an LA agent AROUND a nerve
Intrathecal - Injection directly placed into subarachnoid space
