Gastric Lavage Contraindications in Poisoning Cases

Gastric lavage is a procedure used to empty the stomach contents, often in cases of poisoning. However, it is not suitable for all types of poisoning due to potential risks. The decision to perform gastric lavage depends on the substance ingested, the time elapsed since ingestion, and the patient's condition.

Analyzing Poisoning Types and Lavage Contraindications

Let's examine each poisoning type mentioned:

• 1. Kerosene Poisoning: Gastric lavage is generally contraindicated. Kerosene is a hydrocarbon with low viscosity. Performing lavage increases the risk of aspiration into the lungs, potentially causing severe chemical pneumonitis.
• 2. Organo-phosphorus Poisoning: Gastric lavage is usually indicated, not contraindicated, especially if the ingestion was recent. It helps remove residual poison from the stomach, although absorption can still occur. Treatment focuses on managing symptoms and enhancing elimination.
• 3. Corrosive Poisoning: Gastric lavage is contraindicated. Ingesting corrosive substances (like strong acids or alkalis) can cause severe burns to the mouth, pharynx, esophagus, and stomach. Performing lavage can cause re-exposure, leading to further damage, increased risk of perforation, and esophageal strictures.
• 4. Iron Poisoning: Gastric lavage is typically indicated for significant iron ingestions, especially within the first hour. It helps remove unabsorbed iron tablets from the stomach, aiming to reduce systemic absorption.

Conclusion on Contraindications

Based on the analysis, gastric lavage is contraindicated in:

• Kerosene poisoning (due to aspiration risk)
• Corrosive poisoning (due to risk of further tissue damage and perforation)

Therefore, cases 1 and 3 represent situations where gastric lavage should not be performed.