Module 10 Flashcards
What are the 4 causes of needle breakage?
Bending the needle
Inserting it to the hub
Pt jumps
Use of small needle (big gauge)
What type of problems happen most often with LA administration?
(Local or systemic)
Local
What does paraesthesia mean?
Persistent or prolonged anesthesia
Severe cases of paraesthesia usually go away within what time frame
2 months
What is the most common cause of paraesthesia?
Nicking a nerve
What percentage of LA is known to cause more paraesthesia cases
4%
Contaminated LA solution happens due to?
Soaking carpule in alcohol or cold sterile
What is the problem with soaking LA in alcohol or cold sterile?
Can kill the nerve
Define hyperesthesia
Increased Sensitivity to “noxious” stimuli
Define dysesthesia
Painful sensation to non-noxious stimuli
Reverse Anesthesia
What happens if someone experiences facial nerve paralysis
lA got deposited into parotid gland
Where is the parotid gland located
Posterior border of mandibular ramus
Signs of facial nerve paralysis (3)
Unilateral paralysis
Can’t close eye
Loss of motor function
What is a prolonged spasm of the jaw muscle?
Trismus
What muscle is in spasm during trismus
Massater
What causes trismus
Trauma to muscle or blood vessels in the infratemporal fossa
What causes a hematoma
Nicking an artery or vein
Where will a hematoma show up during a PSA injection
Inferior border of mandible
An iA injection will cause swelling where?
Inside
What is the number 1 reason for pain on injection
Careless technique
What kind of lA solution can cause burning upon injection
Acidic Ph
What are 3 other causes of burning upon injection of LA
Delivering too fast
Contaminated cartridge
Hot solution
What is the recommended deposition time frame
1 ml/min
DONT exceed 1.8ml per minute
What happens of LA drug is biotransformed too slow?
Systemic toxic effect
