## **Core Concept**
Gastric lavage, also known as stomach pumping, is a procedure where the stomach is flushed with liquids to remove toxic substances or gastric contents. The decision to perform gastric lavage depends on the clinical scenario and the potential benefits versus risks. The procedure is generally considered for patients who have ingested a toxic substance within a certain time frame.

## **Why the Correct Answer is Right**
The correct answer, **C. Corrosive poisoning**, is right because gastric lavage is contraindicated in cases of corrosive poisoning. Corrosive substances, such as strong acids or alkalis, cause severe damage to the mucosal lining of the esophagus and stomach. Performing gastric lavage in such cases can lead to further damage, including perforation of the esophagus or stomach, and does not offer any therapeutic benefit.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is not provided, but typically, gastric lavage might be considered in scenarios like drug overdose within a certain time frame.
- **Option B:** This option is not provided, but certain conditions might necessitate gastric lavage for removal of toxic ingestions.
- **Option D:** This option is not provided, but like A and B, it might represent scenarios where gastric lavage could be considered.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that gastric lavage is generally not recommended for routine use in the management of poisoned patients but may be considered on a case-by-case basis. Specifically, it's crucial to avoid gastric lavage in corrosive poisoning due to the high risk of causing further esophageal and gastric damage.

## **Correct Answer:** C. Corrosive poisoning