General principles of treatment of poisoning
- The general principles of treatment of poisoning depend on the specific poison involved and the severity of the poisoning.
- However, the following principles are commonly used in the treatment of poisoning:
General Management Strategy
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Initial Assessment:
- Airway, Breathing, Circulation (ABCs): Ensure airway patency, adequate ventilation, and stabilize circulation.
- Vital signs: Monitor heart rate, blood pressure, respiratory rate, temperature.
- Neurological status: Glasgow Coma Scale (GCS), pupil examination.
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Decontamination:
- Removal from exposure: Move the patient away from the source of poison.
- Skin decontamination: Remove contaminated clothing and wash skin thoroughly.
- Gastrointestinal (GI) decontamination:
- Activated charcoal: Binds many toxins in the GI tract to prevent absorption.
- Gastric lavage (rarely used nowadays, only if life-threatening ingestion within 1 hour).
- Whole bowel irrigation (for certain sustained-release drugs or ingestion of heavy metals or drug packets).
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Supportive Care:
- IV fluids, electrolyte management, oxygen support, and sedation (if needed).
- Monitoring of vital organ function (cardiac, renal, hepatic).
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Enhancement of Elimination:
- Forced diuresis (rarely used, has limitations).
- Urine alkalinization (e.g., with sodium bicarbonate to enhance excretion of weak acids like salicylates).
- Hemodialysis or hemoperfusion for severe poisoning with dialyzable drugs (e.g., lithium, methanol, ethylene glycol).
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Use of Antidotes (if available):
- Many poisons have specific antidotes that neutralize or reverse their toxic effects (e.g., naloxone for opioids, atropine for organophosphorus compounds).
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Monitoring:
- Laboratory investigations: Serum levels of toxins, renal function tests, liver function tests, electrolytes, ECG, etc.
- Observation period: Depending on the poison’s half-life and mechanism.
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