Gaseous, IV and Local Anaesthetics Flashcards
1
Q
Most LA’s are weak bases, True or false
A
TRUE
2
Q
Can ionized LA cross the cell wall?
A
No
3
Q
What channel do LAs block
A
Sodium
4
Q
Two examples of short acting LAs
A
- Benzocaine
- Procaine
5
Q
Two examples of intermediate acting LAS (1-3 hours)
A
- Lignocaine
- Prilocaine
6
Q
One example of long acting LA
A
Bupivacaine (3-10 hour)
7
Q
3 contra-indications for LA and 3 precautions
A
Contra-indications
- Extensive surgical procedures
- Allergies or hypersensitivities to LA
- Local inflammation
Precautions
- Elderly
- Pediatric
- Pregnant
8
Q
4 complications of LA
A
9
Q
Why is a vasoconstrictor included in most LA
A
Because LAs produce local vasodilation which causes rapid washout and increase toxicity.
10
Q
A
