APHA Emergency Response to Reactions 2

Question 1

A patient develops urticaria and facial angioedema 10 minutes after receiving an influenza vaccine. What is the most appropriate initial intervention?

Accepted Answer

Administer epinephrine 1:1000 IM into the anterolateral thigh

Answer

Angioedema combined with urticaria following vaccination indicates anaphylaxis, requiring immediate IM epinephrine as first-line treatment.

Question 2

Which of the following best describes the correct epinephrine dose for anaphylaxis in an adult weighing 80 kg?

Accepted Answer

0.3 mg IM of 1:1000 solution

Answer

Adults and children over 30 kg receive 0.3 mg (0.3 mL) of epinephrine 1:1000 administered intramuscularly.

Question 3

After administering epinephrine for anaphylaxis during vaccination, how long should the patient be monitored before considering discharge?

Accepted Answer

At least 4 hours or until fully stable

Answer

Biphasic anaphylaxis can occur hours after the initial reaction, so patients must be monitored for at least 4 hours or until clinically stable.

Question 4

A 4-year-old child (18 kg) receives a vaccine and develops anaphylaxis. What is the correct epinephrine dose?

Accepted Answer

0.01 mg/kg IM of 1:1000, max 0.5 mg

Answer

Pediatric epinephrine dosing is 0.01 mg/kg IM of the 1:1000 solution, not exceeding 0.5 mg per dose.

Question 5

Which vaccine reaction is characterized by fever, seizures, and hypotonic-hyporesponsive episode (HHE) and is most commonly associated with which vaccine?

Accepted Answer

DTaP vaccine

Answer

HHE (sudden hypotonia, pallor, and unresponsiveness) is most commonly reported after whole-cell pertussis-containing vaccines, including DTaP.

(APHA) American Public Health Association Immunization Certification Practice Test

(APHA) American Public Health Association Immunization Certification Practice Test

APHA Emergency Response to Reactions 2