HESI DENTAL HYGIENE EXAM ACTUAL AND

HESI DENTAL HYGIENE EXAM ACTUAL AND

PRACTICE EXAM NEWEST 2024 ACTUAL EXAM 550

QUESTIONS AND CORRECT DETAILED ANSWERS

(VERIFIED ANSWERS) ALREADY GRADED A+

What condition is characterized by iron in hemoglobin not carrying oxygen effectively? What does acetaminophen do in patients with this condition?

• pernicious anemia
• methemoglobinemia
• sickle anemia
• thalassemia - ANSWER✔✔methemoglobinemia; raises methemoglobin levels

Which local anesthetic has the shortest duration of action?

• lidocaine
• mepivacaine
• prilocaine
• bupivacaine
• benzocaine
• articaine - ANSWER✔✔mepivacaine

When choosing a local anesthetic, a lower pKa does what?

• make it more potent
• make it longer duration
• make it more potent and longer duration 1 / 4

• better absorbed - ANSWER✔✔better absorbed, related to onset of action

Put the local anesthetics in order from shortest to longest duration of action?

• lidocaine
• mepivacaine
• prilocaine
• bupivacaine
• articaine - ANSWER✔✔mepivacaine, lidocaine, prilocaine, articaine, bupivacaine

When choosing a local anesthetic, stronger binding to a protein does what?

• make it more potent
• make it longer duration
• make it more potent and longer duration
• better absorbed - ANSWER✔✔longer duration; related to duration of action

When choosing a local anesthetic, the more lipid soluble it is, what happenst?

• make it more potent
• make it longer duration
• make it more potent and longer duration
• better absorbed - ANSWER✔✔more potent; related to potency

When choosing a local anesthetic, less vasodilation (vasoconstrictor added) does what?

• make it more potent
• make it longer duration 2 / 4

• make it more potent and longer duration
• better absorbed - ANSWER✔✔more potent and longer duration; related to potency and duration of

action

All are reasons vasoconstrictors are added to local anesthetics except:

• decreased absorption
• Increased bleeding
• Decreased bleeding
• Increased duration of action - ANSWER✔✔increased bleeding

T/F: Vasoconstrictors in local anesthetic prevent toxicity by decreasing absorption. What is the only true contraindication to vasoconstrictors? - ANSWER✔✔true; sulfite allergy What is a preservative in local anesthetics that is used with vasoconstrictors and can cause allergy? What are the two vasoconstrictors used in the US? - ANSWER✔✔sulfite; epi and levonordefrin What is the highest concentration of epi? What is the lowest concentration?

A. 1:200,000

B. 1:100,000

• 1:50,000 - ANSWER✔✔1:50,000; 1:200,000 (lowest number is highest concentration)

What is levonordefrin only used in combination with?

• lidocaine
• mepivacaine
• prilocaine
• bupivacaine 3 / 4

• articaine - ANSWER✔✔mepivacaine

How much epi is considered a healthy dose (ASA I or II)?

• 0.02 mg
• 0.04 mg - ANSWER✔✔0.02 mg

How much epi is considered a cardiac dose (ASA III or IV, pregnancy, diabetes, hypertension)?

• 0.02 mg
• 0.04 mg - ANSWER✔✔0.04 mg

What two local anesthetics will ALWAYS have a vasoconstrictor?

• lidocaine
• mepivacaine
• prilocaine
• bupivacaine
• articaine - ANSWER✔✔bupivacaine and articaine (BA)

What local anesthetics make up Oraqix and what is it used for?

• lidocaine
• mepivacaine
• prilocaine
• bupivacaine
• articaine - ANSWER✔✔lidocaine and prilocaine (2.5% each gel) used for periodontal pockets
• / 4