In Class 3 hypovolemic shock, urine output is?

• A. 20-30 ml
• B. 5-15 ml
• C. none
• D. 50-60 ml

Answer: (B)

When volume loss becomes significant, the kidneys receive much less blood flow, so urine production falls. In Class 3 hypovolemic shock, the body’s compensatory mechanisms can’t maintain perfusion to the kidneys, leading to marked oliguria. The typical urine output at this stage is about 5–15 mL per hour. This range reflects severe underperfusion, distinguishing it from milder shock where urine output might be around 20–30 mL per hour, or from normal output around 50–60 mL per hour.