PATHOLOGY

Detailed explanation-1: -Categories of causes of oliguria include decreased renal blood flow, renal insufficiency, and urinary outflow obstruction.

Detailed explanation-2: -Oliguria is when urine output is lower than expected. It is typically a result of dehydration, a blockage, or medications. Most of the time, oliguria can be treated at home, but in some cases, it can be a symptom of a serious medical condition that requires further testing and treatment.