Should I give gastric lavage in peds in opp poisioning
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gastric lavage organophosphate poisoning
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Gastric Lavage in Pediatric Organophosphate (OP) Poisoning
Short Answer: Generally NO - not recommended as routine practice
What the Evidence Says
Tintinalli's Emergency Medicine is unambiguous:
"There is no published evidence demonstrating that gastric lavage improves outcome following organophosphate ingestion."
The treatment table for OP poisoning lists gastric lavage as: "No proven benefit" - right alongside activated charcoal, which also has no proven benefit in this setting.
The One Narrow Exception
A limited role exists only if:
- Within 1 hour of a very large ingestion
- After securing the airway with endotracheal intubation (to prevent aspiration)
- Even then, its performance "should not delay antidotal therapy"
In pediatric patients, this window is even narrower because kids often present later after ingestion is discovered, and airway management in small children carries higher procedural risk.
Why Lavage is Avoided
- Risk of aspiration - OP poisoning causes excessive secretions and reduced airway reflexes; lavage without an intubated airway is extremely dangerous
- Delays antidote administration - atropine and pralidoxime (oximes) are the life-saving treatments; lavage wastes time
- OPs are rapidly absorbed - by the time most patients present, most absorption has already occurred
What You SHOULD Do Instead (from Tintinalli's Treatment Table)
| Priority | Intervention |
|---|---|
| 1st | External decontamination - remove clothing, wash skin with soap and water (use PPE - secondary poisoning risk to staff) |
| 2nd | Airway + 100% O2, cardiac monitoring, pulse oximetry |
| Antidote | Atropine - pediatric dose: 0.05 mg/kg IV, double every 5 min until secretions dry up (clear chest, HR >80, SBP >80 mmHg), then continuous infusion |
| Oxime | Pralidoxime (2-PAM) - reactivates cholinesterase; give early before "aging" occurs |
| Seizures | Benzodiazepines (diazepam/midazolam) |
Key Pediatric-Specific Notes
- Atropine dose in children starts at 0.05 mg/kg IV (not the adult 1.2-3 mg bolus)
- Children may absorb OP more efficiently through skin - dermal decontamination is very important
- The endpoint of atropinization is drying of secretions / clear chest, NOT pupil size or heart rate alone
- Pralidoxime must be given early - once cholinesterase "aging" occurs (hours to days depending on the specific OP compound), it is no longer effective
Bottom line: Skip the gastric lavage. Protect the airway, decontaminate the skin, and start atropine immediately. Lavage is only a consideration in the rare scenario of a massive ingestion presenting within 1 hour with a secured airway - and even then it should not delay antidote therapy.
- Tintinalli's Emergency Medicine: A Comprehensive Study, Table 201-3 (Treatment for Organophosphate Poisoning)
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