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Local Anesthesia final > vasoconstrictors > Flashcards

Flashcards in vasoconstrictors Deck (13):
1

5 contents of an LA carpule

La agent

vasoconstrictor

antioxidant

preservative

ph adjusting agent

2

what is the antioxidant thats usually in a carpule

sodium metabisulfite (allergies)

3

what is the preservative that is usually in carpules (multidose only)

methylparaben (can cause allergies too)

4

plain local anesthetics are ... by nature

vasodilators

5

how much max epi in CV patients

0.04 mg (2 cartridges of 1:100,000 epi)

6

what happens when you give a VC with alpha blockers (such as phenothiazines and butyrophenones)

hypotension and tachycardia

7

what happens when you give VC with non-selective beta blockers

hypertension and bradycardia

8

what happens when you give VC with a selective beta blocker (b1)

no effects since a1 will increase BP and b2 will decrease

9

what happens when yo u give VC with tricyclic antidepressants (amitriptyline/ elavil)

exogenous epinephrine may produce exaggerated effects since TCAs block reuptake of epi and norepi

10

are patients on TCAs contraindicated for VC

no but dont give more than 0.2

11

what happens when you give VC with patients on MAO inhibitors (phenylzine/Nardil)

little change since epi is also metabolized by COMT

12

what happens if you give VC with amphetamines/cocaine?

exaggerated response.

Should wait 24 hours!!!

13

5 contraindications to using vasoconstrictors

severe CV disease (ASA IV)

acute MI

anginal episodes at rest (unstable angine)

cardiac dysrhythmias that are refractory to drug treatent

patient with uncontrolled hyperthyroidism