In child, Intra-osseous injection should administer in?

Appeared in: NORCET 3 - 2022 (Shift-1)

Explanation

The term "intraosseous" (IO) literally means "within the bone.".
IO injections are administered into the bone marrow, which contains a rich, non-collapsible network of blood vessels that provides rapid access to the systemic circulation.
This route is a critical alternative in emergencies when traditional intravenous (IV) access cannot be quickly established, particularly in children.
Almost any medication or fluid that can be given intravenously can also be administered via the IO route.

Option B: Injecting into the spinal cord is an intrathecal or epidural route, used for regional anesthesia or specific CNS medications, not for systemic access.
Option C: Injecting into a vein is an intravenous (IV) route. IO is used as an alternative when IV access is not possible.
Option D: The endotracheal route is for administering specific aerosolized or liquid medications into the lungs via an endotracheal tube.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Intraosseous (IO) injection site and procedure in pediatrics as background academic context rather than a clinical decision trigger.
IO access is a life-saving intervention in pediatric emergencies (e.g., cardiac arrest, severe shock, major trauma) when IV access is delayed for more than 90 seconds or after three failed attempts.
Nurses must meticulously monitor the IO site for signs of complications, including extravasation (fluid leaking into surrounding tissue), compartment syndrome (swelling and pressure in a muscle compartment), and osteomyelitis (bone infection).
An IO line is a temporary bridge to definitive vascular access. It should be removed as soon as stable IV or central venous access is obtained, typically within 24 hours.

How to Approach the Question

First, analyze the key term in the question: "Intra-osseous injection".
Break down the term: "Intra-" means within, and "osseous" relates to bone.
Therefore, the injection must be administered within a bone.
Evaluate the options based on this definition. "Bone marrow" is the soft tissue inside the bone, making it the correct target.
Eliminate the other options by identifying their correct route of administration: "Spinal cord" (intrathecal), "Vein" (intravenous), and "Endotracheal" (pulmonary/airway).

Concept Tested & Keywords

Concept Tested: Intraosseous (IO) injection site and procedure in pediatrics.
Stem keywords: child, Intra-osseous injection
Lead-in keywords: administer in
Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.
Negative lead-in flag: false

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E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 779-781

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 615-617

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Attempt every question from this paper in a timed mock, then review the full solution for each one.