Symptoms of iron poisoning in a 3-year-old child may include severe GI distress with hematemesis, a shock like state with marked dehydration and progressive hemorrhagic gastritis. Regarding the management of iron toxicity, which one of the following statements is accurate?
First, the core concept here is iron toxicity. Iron poisoning is a common pediatric emergency, especially in young children who might ingest iron supplements. The symptoms mentioned—GI distress, hematemesis, shock, dehydration, and hemorrhagic gastritis—are classic signs of acute iron toxicity.
Now, management of iron poisoning. The key points to remember are the use of chelation therapy. Deferoxamine is the specific chelator for iron. It forms a complex with iron, allowing excretion via urine. The administration is usually via IV or IM, and it's indicated when there's significant toxicity.
The wrong options might include other chelators like EDTA or DMSA, which are used for other heavy metals (EDTA for lead, DMSA for arsenic). Also, options about using activated charcoal might be incorrect because iron is not effectively adsorbed by charcoal, and it can cause complications like bowel obstruction if used in large amounts. Another possible wrong option could be about using a proton pump inhibitor (PPI) for the gastritis, but while PPIs help with symptoms, they don't treat the iron toxicity itself.
Clinical pearls: Remember that deferoxamine is the only chelator for iron. Also, the "string sign" on X-ray is a classic finding, and the treatment is urgent once severe symptoms are present. The high-yield fact is that deferoxamine is the specific antidote and should be given when appropriate.
Putting it all together, the correct answer is the one that states deferoxamine as the treatment. The other options would be incorrect for the reasons mentioned. The clinical pearl to remember is the specific antidote and when to use it.
**Core Concept**
Iron toxicity management involves specific chelation therapy. Deferoxamine is the only FDA-approved chelator for iron poisoning, forming a stable complex with free iron (ferrioxamine) for renal excretion. Early intervention is critical to prevent multi-organ failure.
**Why the Correct Answer is Right**
Deferoxamine binds extracellular free iron, preventing further tissue damage. It is indicated for serum iron >350 mcg/dL or symptoms like shock, coagulopathy, or metabolic acidosis. Administration via IV or IM is standard, with the "string sign" on chest X-ray (red-colored mucus from ferrioxamine complexes) as a diagnostic clue.
**Why Each Wrong Option is Incorrect**
**Option A:** Activated charcoal is ineffective for iron due to poor adsorption and risk of bowel obstruction.
**Option B:** EDTA (calcium disodium versenate) is used for lead poisoning, not iron.
**Option C:** Gastric lavage is contraindicated in iron poisoning due to risk of mucosal injury and bleeding.
**Clinical Pearl / High-Yield Fact**
Deferoxamine must be administered **only when free iron is present** (e.g., in acute toxicity). Chronic iron overload is managed with phlebotomy or iron chelation with deferasirox or deferiprone. Never use deferoxamine in chronic cases—risk of "ferrioxamine embolism."
**Correct Answer: