Which lab pattern suggests ongoing intra-abdominal bleeding?

Which lab pattern suggests ongoing intra-abdominal bleeding?

• A. Increasing hematocrit and decreasing lactate
• B. Decreasing hematocrit and rising lactate
• C. Normal hematocrit and normal lactate
• D. Decreased lactate with increased perfusion

Answer: (B)

Intra-abdominal bleeding that is still ongoing tends to show a fall in hematocrit along with a rise in lactate. The hematocrit drop reflects blood loss, but it often lags behind the actual bleed because early bleeding can be compensated and fluids can dilute blood. Lactate increases when tissues don’t receive enough oxygen due to reduced perfusion, signaling ongoing hypoperfusion from active bleeding. Together, these trends point to continued hemorrhage with shock, guiding urgent escalation of care. If hematocrit were rising, that would argue against active ongoing bleed. Normal hematocrit and lactate don’t indicate active bleeding either, and a decreasing lactate with better perfusion would suggest improving perfusion rather than ongoing hemorrhage.

Intra-abdominal bleeding that is still ongoing tends to show a fall in hematocrit along with a rise in lactate. The hematocrit drop reflects blood loss, but it often lags behind the actual bleed because early bleeding can be compensated and fluids can dilute blood. Lactate increases when tissues don’t receive enough oxygen due to reduced perfusion, signaling ongoing hypoperfusion from active bleeding. Together, these trends point to continued hemorrhage with shock, guiding urgent escalation of care.

If hematocrit were rising, that would argue against active ongoing bleed. Normal hematocrit and lactate don’t indicate active bleeding either, and a decreasing lactate with better perfusion would suggest improving perfusion rather than ongoing hemorrhage.