In Class 4 hypovolemic shock, urine output is?

In Class 4 hypovolemic shock, urine output is?

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

Answer: (D)

In severe hypovolemic shock, kidneys receive very little blood flow, so filtration plummets and the body prioritizes perfusion to essential organs. This leads to marked urine conservation and often near absence of urine, known as anuria. Because of this extreme drop, none of the listed numeric ranges apply—the expected urine output is effectively zero. The other ranges reflect less severe stages where some urine production persists, but in the most advanced shock, the output is negligible.

In severe hypovolemic shock, kidneys receive very little blood flow, so filtration plummets and the body prioritizes perfusion to essential organs. This leads to marked urine conservation and often near absence of urine, known as anuria. Because of this extreme drop, none of the listed numeric ranges apply—the expected urine output is effectively zero. The other ranges reflect less severe stages where some urine production persists, but in the most advanced shock, the output is negligible.