**Core Concept**
Gastric lavage, also known as stomach pumping, is a procedure used to remove stomach contents after a toxic ingestion. The decision to perform gastric lavage is based on the type of ingested substance, the time elapsed since ingestion, and the patient's clinical status.

**Why the Correct Answer is Right**
Gastric lavage is generally not recommended for patients who have ingested corrosive substances, such as acids or alkalis, as it can cause further damage to the esophageal and gastric mucosa. This is because the lavage process can push the corrosive agent deeper into the esophagus and stomach, leading to severe burns and complications. The American College of Medical Toxicology (ACMT) and the American Academy of Clinical Toxicology (AACT) recommend against the use of gastric lavage in such cases.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because gastric lavage is sometimes performed in patients with altered mental status or those who are at risk of aspiration, but it's not the primary contraindication.
**Option B:** This option is incorrect because gastric lavage is not recommended for patients with a history of recent eating or those who are at risk of aspiration, but it's not the primary contraindication for corrosive ingestions.
**Option C:** This option is incorrect because gastric lavage is sometimes performed in patients with a high risk of mortality or severe sequelae, but it's not the primary contraindication.
**Option D:** This option is incorrect because gastric lavage is generally not recommended for patients who have ingested corrosive substances, such as acids or alkalis.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that gastric lavage is not a substitute for prompt medical treatment, and the decision to perform the procedure should be based on a thorough evaluation of the patient's clinical status and the type of ingested substance.

**Correct Answer: D. Gastric lavage is NOT done in patients who have ingested corrosive substances, such as acids or alkalis.**