ARRT Patient Care Practice Exam

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What condition may cause a rapid Lab value increase in creatinine?

Dehydration
Aging
Gastric bypass surgery
Asthma

The correct answer is: Dehydration

A rapid increase in creatinine levels is primarily associated with dehydration because it leads to a reduction in kidney perfusion and filtration capability. When a person is dehydrated, the kidneys are not able to effectively filter waste products from the blood, resulting in elevated levels of creatinine. This is due to the kidneys reacting to the decreased fluid volume by conserving as much water as possible, which leads to a higher concentration of creatinine in the blood. While aging can potentially affect kidney function over time, it does not typically cause acute changes in creatinine levels. Similarly, gastric bypass surgery may lead to various metabolic changes but is not closely linked to sudden increases in creatinine. Asthma, primarily a respiratory condition, does not have a direct impact on kidney function or creatinine levels. Therefore, dehydration stands out as the primary factor that would lead to a rapid increase in creatinine.