Which factor could lead to acute anemia?

Acute anemia refers to a rapid decrease in the number of red blood cells, leading to a low hemoglobin level and diminished oxygen transport to tissues. The factor that can lead to this rapid onset of anemia is loss of blood from trauma. In traumatic events, such as accidents or injuries, significant blood loss can occur suddenly, causing a quick drop in red blood cell levels. This situation can lead to symptoms such as weakness, fatigue, and pallor, requiring immediate medical intervention to manage the potential shock and other complications arising from the sudden loss of blood volume.

Other factors listed, while they can contribute to anemia, typically do so over a longer duration. Chronic gastrointestinal bleeding may lead to anemia but does so gradually rather than acutely. Nutritional deficiencies cause anemia over time as they lead to a decrease in red blood cell production, and genetic conditions, while they can cause chronic or recurring anemia, do not typically result in an acute episode of anemia without an additional acute event such as bleeding or hemolysis.