In a patient with sepsis who is receiving broad-spectrum IV antibiotics, which laboratory value best indicates that the treatment is effective?

In a patient with sepsis who is receiving broad-spectrum IV antibiotics, which laboratory value best indicates that the treatment is effective?

• A. Decreasing Serum Lactate Level
• B. Rising White Blood Cell Count
• C. Persistent Fever Despite Antibiotics
• D. Normal Calcium Level

Answer: (A)

A decreasing serum lactate level is the best sign that treatment is working because lactate reflects tissue perfusion and oxygen delivery. In sepsis, high lactate indicates tissue hypoperfusion and anaerobic metabolism; as antibiotics take effect and fluids improve circulation, lactate production drops and existing lactate is cleared, so the level should fall with recovery. White blood cell counts can be elevated for reasons other than immediate improvement and may lag behind clinical changes. A fever may persist despite effective therapy and doesn’t reliably indicate current control of infection. Calcium levels aren’t a primary measure of sepsis response.

A decreasing serum lactate level is the best sign that treatment is working because lactate reflects tissue perfusion and oxygen delivery. In sepsis, high lactate indicates tissue hypoperfusion and anaerobic metabolism; as antibiotics take effect and fluids improve circulation, lactate production drops and existing lactate is cleared, so the level should fall with recovery. White blood cell counts can be elevated for reasons other than immediate improvement and may lag behind clinical changes. A fever may persist despite effective therapy and doesn’t reliably indicate current control of infection. Calcium levels aren’t a primary measure of sepsis response.