Adr (Epi) N LA

Question 1

Effect of LA can be increased by addition of?

Answer 1

Adr (Vasoconstrictor) - vasoconstriction of both a n b receptors

Over… Felypressin ( a synthetic vasopressin)

Norepinephrine NOT indicated in dentistry coz of it’s predominant action on a receptor ———-+ intense vasoconstriction ———-+ NECROSIS of the local tissue may occur…

Question 2

Why is Nor epi is not indicated in dentistry?

Answer 2

Because it’s predominant action is on ‘a’ receptors…

It causes INTENSE Vasoconstriction….. Blood supply to the local area will b compromised…. Necrosis!

Question 3

ABSOLUTE C/I of LA with Adr?

Answer 3

Hyperthyroidism…

Instead… Use Ligno without Adr or 3% Mepivacaine….

Question 4

Max dose of LA without Adr in a 60 kg PT?

Answer 4

300 mg

Question 5

Action of Adr is potentiated in the presence of all except?

Answer 5

Halothane…. Ethyl Chloride… Cyclopropane…