COMPREHENSIVE PROFESSIONAL NURSING
EXAMINATION
Pediatric Immunization, Administration Techniques, Pharmacology, and
Safe Clinical Practice
(200 Clinical Questions with Detailed Rationales
Domain 1: Pediatric Immunization Core & Primary Scenario
(Questions 1-35)
Question 1
A nurse is preparing to administer an intramuscular immunization to a 4-
year-old child. Which of the following actions should the nurse plan to
take?
A. Administer the injection in the deltoid muscle using a 1-inch
needle.
B. Administer the injection in the ventrogluteal muscle using a 5/8-
inch needle.
C. Administer the injection in the vastus lateralis muscle using a 1-
inch needle.
D. Administer the injection in the dorsogluteal muscle using a 1.5-inch
needle.
Answer: Correct Answer: C. Administer the injection in the vastus
lateralis muscle using a 1-inch needle.
Rationale: Rationale: For a 4-year-old child, the preferred site for
intramuscular (IM) injections is the vastus lateralis muscle in the
anterolateral thigh. The recommended needle length for toddler and
preschool IM injections in the vastus lateralis is 1 inch (25 mm) to
,ensure proper deposition into muscle tissue without striking bone. The
deltoid muscle may be used for children aged 3 years and older for
certain vaccines (like MMR or DTaP boosters) if the muscle mass is
adequate, but 1 inch is standard for vastus lateralis. The dorsogluteal
site is strictly contraindicated in pediatric clients due to the risk of
sciatic nerve injury and superior gluteal artery laceration.
Question 2
The nurse is preparing to administer two different intramuscular
vaccines to the 4-year-old child during the same visit. Which of the
following is the most appropriate technique for site administration?
A. Administer both injections in the same anatomical site, spaced 1
inch apart.
B. Administer the injections in separate limbs (e.g., right and left
vastus lateralis).
C. Mix both vaccine antigens in the same syringe to minimize trauma.
D. Administer one IM and one intradermally in the same site.
Answer: Correct Answer: B. Administer the injections in separate limbs
(e.g., right and left vastus lateralis).
Rationale: Rationale: When multiple IM vaccines are administered at
the same visit, they should be given in different limbs or separated by at
least 1 to 2 inches in the same muscle if two must be given in one limb,
to prevent overlapping local adverse reactions. Mixing vaccines in the
same syringe is strictly prohibited unless specifically licensed and
approved for mixing by the manufacturer.
,Question 3
During the preparation of the immunization for the 4-year-old child in
question 3, which nursing action reflects adherence to standard infection
control protocols?
A. Recapping the needle using a two-handed technique immediately
after injection.
B. Wearing sterile gloves throughout the entire vaccine reconstitution
and administration process.
C. Performing hand hygiene and applying clean gloves prior to
vaccine preparation and administration.
D. Wiping the multi-dose vial rubber stopper with an alcohol swab and
allowing it to air dry.
Answer: Correct Answer: D. Wiping the multi-dose vial rubber stopper
with an alcohol swab and allowing it to air dry.
Rationale: Rationale: Standard precautions require wiping rubber
stoppers of vaccine vials with an alcohol swab and allowing them to air
dry before piercing. Needles must never be recapped using a two-
handed technique (safety devices or one-handed scoop technique should
be used if recapping is necessary, though safety needles with engineered
guards are standard). Sterile gloves are not required for IM injections;
clean gloves are used when there is potential exposure to blood or body
fluids, and hand hygiene is performed before and after patient contact.
Question 4
During the preparation of the immunization for the 4-year-old child in
question 4, which nursing action reflects adherence to standard infection
control protocols?
, A. Recapping the needle using a two-handed technique immediately
after injection.
B. Wearing sterile gloves throughout the entire vaccine reconstitution
and administration process.
C. Performing hand hygiene and applying clean gloves prior to
vaccine preparation and administration.
D. Wiping the multi-dose vial rubber stopper with an alcohol swab and
allowing it to air dry.
Answer: Correct Answer: D. Wiping the multi-dose vial rubber stopper
with an alcohol swab and allowing it to air dry.
Rationale: Rationale: Standard precautions require wiping rubber
stoppers of vaccine vials with an alcohol swab and allowing them to air
dry before piercing. Needles must never be recapped using a two-
handed technique (safety devices or one-handed scoop technique should
be used if recapping is necessary, though safety needles with engineered
guards are standard). Sterile gloves are not required for IM injections;
clean gloves are used when there is potential exposure to blood or body
fluids, and hand hygiene is performed before and after patient contact.
Question 5
During the preparation of the immunization for the 4-year-old child in
question 5, which nursing action reflects adherence to standard infection
control protocols?
A. Recapping the needle using a two-handed technique immediately
after injection.
B. Wearing sterile gloves throughout the entire vaccine reconstitution
and administration process.
EXAMINATION
Pediatric Immunization, Administration Techniques, Pharmacology, and
Safe Clinical Practice
(200 Clinical Questions with Detailed Rationales
Domain 1: Pediatric Immunization Core & Primary Scenario
(Questions 1-35)
Question 1
A nurse is preparing to administer an intramuscular immunization to a 4-
year-old child. Which of the following actions should the nurse plan to
take?
A. Administer the injection in the deltoid muscle using a 1-inch
needle.
B. Administer the injection in the ventrogluteal muscle using a 5/8-
inch needle.
C. Administer the injection in the vastus lateralis muscle using a 1-
inch needle.
D. Administer the injection in the dorsogluteal muscle using a 1.5-inch
needle.
Answer: Correct Answer: C. Administer the injection in the vastus
lateralis muscle using a 1-inch needle.
Rationale: Rationale: For a 4-year-old child, the preferred site for
intramuscular (IM) injections is the vastus lateralis muscle in the
anterolateral thigh. The recommended needle length for toddler and
preschool IM injections in the vastus lateralis is 1 inch (25 mm) to
,ensure proper deposition into muscle tissue without striking bone. The
deltoid muscle may be used for children aged 3 years and older for
certain vaccines (like MMR or DTaP boosters) if the muscle mass is
adequate, but 1 inch is standard for vastus lateralis. The dorsogluteal
site is strictly contraindicated in pediatric clients due to the risk of
sciatic nerve injury and superior gluteal artery laceration.
Question 2
The nurse is preparing to administer two different intramuscular
vaccines to the 4-year-old child during the same visit. Which of the
following is the most appropriate technique for site administration?
A. Administer both injections in the same anatomical site, spaced 1
inch apart.
B. Administer the injections in separate limbs (e.g., right and left
vastus lateralis).
C. Mix both vaccine antigens in the same syringe to minimize trauma.
D. Administer one IM and one intradermally in the same site.
Answer: Correct Answer: B. Administer the injections in separate limbs
(e.g., right and left vastus lateralis).
Rationale: Rationale: When multiple IM vaccines are administered at
the same visit, they should be given in different limbs or separated by at
least 1 to 2 inches in the same muscle if two must be given in one limb,
to prevent overlapping local adverse reactions. Mixing vaccines in the
same syringe is strictly prohibited unless specifically licensed and
approved for mixing by the manufacturer.
,Question 3
During the preparation of the immunization for the 4-year-old child in
question 3, which nursing action reflects adherence to standard infection
control protocols?
A. Recapping the needle using a two-handed technique immediately
after injection.
B. Wearing sterile gloves throughout the entire vaccine reconstitution
and administration process.
C. Performing hand hygiene and applying clean gloves prior to
vaccine preparation and administration.
D. Wiping the multi-dose vial rubber stopper with an alcohol swab and
allowing it to air dry.
Answer: Correct Answer: D. Wiping the multi-dose vial rubber stopper
with an alcohol swab and allowing it to air dry.
Rationale: Rationale: Standard precautions require wiping rubber
stoppers of vaccine vials with an alcohol swab and allowing them to air
dry before piercing. Needles must never be recapped using a two-
handed technique (safety devices or one-handed scoop technique should
be used if recapping is necessary, though safety needles with engineered
guards are standard). Sterile gloves are not required for IM injections;
clean gloves are used when there is potential exposure to blood or body
fluids, and hand hygiene is performed before and after patient contact.
Question 4
During the preparation of the immunization for the 4-year-old child in
question 4, which nursing action reflects adherence to standard infection
control protocols?
, A. Recapping the needle using a two-handed technique immediately
after injection.
B. Wearing sterile gloves throughout the entire vaccine reconstitution
and administration process.
C. Performing hand hygiene and applying clean gloves prior to
vaccine preparation and administration.
D. Wiping the multi-dose vial rubber stopper with an alcohol swab and
allowing it to air dry.
Answer: Correct Answer: D. Wiping the multi-dose vial rubber stopper
with an alcohol swab and allowing it to air dry.
Rationale: Rationale: Standard precautions require wiping rubber
stoppers of vaccine vials with an alcohol swab and allowing them to air
dry before piercing. Needles must never be recapped using a two-
handed technique (safety devices or one-handed scoop technique should
be used if recapping is necessary, though safety needles with engineered
guards are standard). Sterile gloves are not required for IM injections;
clean gloves are used when there is potential exposure to blood or body
fluids, and hand hygiene is performed before and after patient contact.
Question 5
During the preparation of the immunization for the 4-year-old child in
question 5, which nursing action reflects adherence to standard infection
control protocols?
A. Recapping the needle using a two-handed technique immediately
after injection.
B. Wearing sterile gloves throughout the entire vaccine reconstitution
and administration process.
