Stress ulcers is caused by all of the following except?
**Core Concept**
Stress ulcers, also known as stress-related mucosal damage (SRMD), are a type of gastric mucosal injury that occurs in critically ill patients, particularly those with severe burns, head trauma, or sepsis. This condition is characterized by mucosal breakdown and bleeding due to the imbalance between mucosal defense mechanisms and aggressive factors.
**Why the Correct Answer is Right**
The pathogenesis of stress ulcers involves the disruption of the gastric mucosal barrier, leading to the exposure of the submucosa to acid and pepsin. This can be caused by factors such as increased gastric acid production, decreased mucosal blood flow, and impaired mucosal defense mechanisms. The use of corticosteroids, nonsteroidal anti-inflammatory drugs (NSAIDs), and certain medications like H2-receptor antagonists can also contribute to the development of stress ulcers.
**Why Each Wrong Option is Incorrect**
**Option A:** While steroids can exacerbate the risk of stress ulcers, they are not the primary cause. Steroids can weaken the mucosal barrier, but this is not the direct cause of stress ulcers.
**Option B:** Aspirin and NSAIDs can cause gastric mucosal damage and increase the risk of stress ulcers, but they are not the only cause. Other factors such as infection, trauma, and severe illness also play a role.
**Option C:** Infection is a known risk factor for stress ulcers, particularly in critically ill patients. Infection can lead to the release of pro-inflammatory cytokines, which can damage the gastric mucosa and increase the risk of bleeding.
**Clinical Pearl / High-Yield Fact**
In critically ill patients, stress ulcers are a significant concern, and prophylactic measures such as the use of H2-receptor antagonists or proton pump inhibitors (PPIs) can help reduce the risk of bleeding.
**Correct Answer:** A. Steroids can exacerbate the risk of stress ulcers, but they are not the primary cause.