topical anesthetic Flashcards
topical anesthetic
a drug applied to the mucous membrane with a degree of short duration desensitization of the gingiva
triggers sensory nerves
indications of topical anesthetic
takes away prick of needle
provides temporary relief to patient
helps with gag reflex
suture removal
contradications of topical anesthetic
allergic reactions
affect heart rate pulse and temperature
3 forms of topical anesthetic
ointment
liquid
spray
2 forms of topical anesthetic
ester type: benzocaine, tetracaine (allergen)
amide type: lidocaine not allergen
how does topical anesthetic work
coats nerve endings 2-3mm below the surface by coating them inhibiting their ability to register pain response
how long does topical anesthetic last
a couple of minutes
how long should the topical be kept on the mucosa in order to work
1-2 mins
(base on manufacturer’s instructions)
how long is ideal for the types of topical anesthetic initial placement
benzocaine 30 sec
tetracaine 2 min
lidocaine 1-2 min
when to not use topical anesthetic
allergy
infected tissue
lesions in tissue
(depending on if the lesion is the reason topical is being placed)
adverse reactions to topical anesthetic
agitation
speech irregularities
erythema (redness) or angiodema (swelling) of mucous membrane
increased vital signs
erythema
redness
angiodema
swelling
what is the 5th cranial nerve
trigeminal nerve
breaks into the maxillary and mandibular divisions
maxillary division
second largest branch of the trigeminal nerve breaks into 5 smaller divisions
