Central Sterile Services Department (CSSD) Practice Exam

At what percentage of dehydration might hallucinations occur?

1. 3%

2. 5%

3. 7%

4. 10%

The correct answer is: 7%

Hallucinations may occur at around 7% dehydration because, at this level, the body experiences significant physiological stress that affects brain function. Dehydration leads to a reduction in brain volume and blood flow, ultimately disrupting the balance of electrolytes and neurotransmitters in the body. This disruption can impair cognitive functions and may result in symptoms such as confusion, disorientation, and in more severe cases, hallucinations. While mild dehydration (around 3% to 5%) can cause symptoms like thirst, fatigue, and decreased physical performance, it typically does not lead to the severe neurological symptoms associated with higher levels of dehydration. By the time a person reaches 10% dehydration, they may face life-threatening complications, including severe shock, organ failure, and potentially death, which suggests that while hallucinations can start at around 7% dehydration, the body would have reached critical distress beyond that point.