LOCAL ANESTHESIA UPDATED FINAL EXAM ALL
QUESTIONS AND ANSWERS SURE A+
✔✔Max epi dose for normal and cardiac patients - ✔✔Normal- .2mg
Cardiac- .04mg
✔✔Max Levofedrin dose for normal and cardiac patients - ✔✔Normal- 1 mg
Cardiac- .2mg
✔✔What is trismus? - ✔✔Limited opening of mouth
✔✔Management of hematoma - ✔✔Cold compression and pressure to bleeding site
✔✔Management of trismus - ✔✔Heat therapy, saline rinses, asprin and jaw exercises
✔✔Hematoma can occur if needle penetrates into the pterygoid plexus of veins during
which injection? - ✔✔PSA
✔✔What needle should be used for infiltration? - ✔✔27g short
✔✔Volume of solution of a single cartridge of LA - ✔✔1.7-1.8ml
, ✔✔Antioxidant preventing biodegration of LA by preventing oxidation of vasopressor by
oxygen - ✔✔Sodium bisulfite
✔✔Actions of vasopressors - ✔✔Increase duration of LA, hemostasis, reduce chance of
toxicity, reduces chance of systemic absorption
✔✔What would cause a dry cornea? - ✔✔Anesthetizing the facial nerve. The facial
nerve can be anesthetized if bone is not contacted during the IANB and anesthetic
solution is deposited into the parotid gland. Temporary bell's palsy would not allow the
patients eyelid to blink or close, which would cause the dry eye.
✔✔How to calculate amount of L.A. in solution - ✔✔1% solution = 10mg/ml X 1.8ml =
18mg
2% solution = 20mg/ml X 1.8ml = 36mg
3% solution = 30mg/ml X 1.8ml = 54 mg
✔✔How to calculate the amount of vasoconstrictor in solution - ✔✔1:50,000= .02mg/ml
x 1.8ml = .036mg
1:100,000= .01mg/ml x 1.8ml = .018mg
1:200,000= .005mg/ml x 1.8ml = .009mg
✔✔Cause of burning upon injection - ✔✔acidic pH of solution, injection too fast,
cartridge being wiped with alcohol or sterilizing solution
✔✔Cause of needle breakage - ✔✔Bending needle, patient movement, going to the
hub
✔✔Why would a patient receive an electric shock during delivery of anesthesia? -
✔✔Needle touched the nerve sheath
✔✔Ongoing numbness of the anterior 2/3 of tongue is caused by which nerve being
anesthetized? - ✔✔Lingual Nerve
Posterior 1/3 is from the glossopharyngeal nerve
✔✔What is the benefit of slow deposition rate? - ✔✔Less pain, less complications
✔✔Location for the long buccal injection - ✔✔Distal and buccal to the 2nd mandibular
molar
✔✔Why does anesthesia fail to work near an abscessed tooth? - ✔✔Infection causes
lower pH which does not allow ionization of sodium molecules
✔✔Nerve that innervates the soft palate - ✔✔Lesser Palatine Nerve
QUESTIONS AND ANSWERS SURE A+
✔✔Max epi dose for normal and cardiac patients - ✔✔Normal- .2mg
Cardiac- .04mg
✔✔Max Levofedrin dose for normal and cardiac patients - ✔✔Normal- 1 mg
Cardiac- .2mg
✔✔What is trismus? - ✔✔Limited opening of mouth
✔✔Management of hematoma - ✔✔Cold compression and pressure to bleeding site
✔✔Management of trismus - ✔✔Heat therapy, saline rinses, asprin and jaw exercises
✔✔Hematoma can occur if needle penetrates into the pterygoid plexus of veins during
which injection? - ✔✔PSA
✔✔What needle should be used for infiltration? - ✔✔27g short
✔✔Volume of solution of a single cartridge of LA - ✔✔1.7-1.8ml
, ✔✔Antioxidant preventing biodegration of LA by preventing oxidation of vasopressor by
oxygen - ✔✔Sodium bisulfite
✔✔Actions of vasopressors - ✔✔Increase duration of LA, hemostasis, reduce chance of
toxicity, reduces chance of systemic absorption
✔✔What would cause a dry cornea? - ✔✔Anesthetizing the facial nerve. The facial
nerve can be anesthetized if bone is not contacted during the IANB and anesthetic
solution is deposited into the parotid gland. Temporary bell's palsy would not allow the
patients eyelid to blink or close, which would cause the dry eye.
✔✔How to calculate amount of L.A. in solution - ✔✔1% solution = 10mg/ml X 1.8ml =
18mg
2% solution = 20mg/ml X 1.8ml = 36mg
3% solution = 30mg/ml X 1.8ml = 54 mg
✔✔How to calculate the amount of vasoconstrictor in solution - ✔✔1:50,000= .02mg/ml
x 1.8ml = .036mg
1:100,000= .01mg/ml x 1.8ml = .018mg
1:200,000= .005mg/ml x 1.8ml = .009mg
✔✔Cause of burning upon injection - ✔✔acidic pH of solution, injection too fast,
cartridge being wiped with alcohol or sterilizing solution
✔✔Cause of needle breakage - ✔✔Bending needle, patient movement, going to the
hub
✔✔Why would a patient receive an electric shock during delivery of anesthesia? -
✔✔Needle touched the nerve sheath
✔✔Ongoing numbness of the anterior 2/3 of tongue is caused by which nerve being
anesthetized? - ✔✔Lingual Nerve
Posterior 1/3 is from the glossopharyngeal nerve
✔✔What is the benefit of slow deposition rate? - ✔✔Less pain, less complications
✔✔Location for the long buccal injection - ✔✔Distal and buccal to the 2nd mandibular
molar
✔✔Why does anesthesia fail to work near an abscessed tooth? - ✔✔Infection causes
lower pH which does not allow ionization of sodium molecules
✔✔Nerve that innervates the soft palate - ✔✔Lesser Palatine Nerve
