How is lactate clearance calculated and what targets are used?

Lactate clearance = [(Initial lactate - Follow-up lactate) / Initial lactate] x 100%. Target: >=10% clearance per 2 hours. SSC Hour-1 bundle: measure lactate, recheck if >2 mmol/L. Jones et al. (NEJM 2010): lactate clearance >=10% non-inferior to ScvO2 >70% as resuscitation endpoint. Lactate normalization (<2 mmol/L) within 6 hours associated with 14% absolute mortality reduction.

What does persistent hyperlactatemia indicate in septic shock?

Lactate >4 mmol/L after 6 hours of resuscitation: poor prognostic sign (in-hospital mortality >50%). Causes: tissue hypoperfusion, microcirculatory failure, mitochondrial dysfunction, impaired hepatic clearance, increased glycolytic flux (Warburg effect), epinephrine effect on beta-2 receptors. Serial measurement more informative than single point.

Septic Shock Lactate Clearance Target Calculator

Calculate lactate clearance percentage from serial measurements to assess resuscitation adequacy in septic shock. Target >=10% clearance per 2 hours; lactate <2 mmol/L within 6 hours associated with improved survival.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.

How It Works

Each component has a specific meaning:

Serial measurements — The serial measurements recorded for the scenario being assessed.

Note: Interpret the lactate clearance target result against the thresholds and context described above.

How to Use

Enter the serial measurements for the scenario you are assessing. Calculate lactate clearance percentage from serial measurements to assess resuscitation adequacy in septic shock. Target >=10% clearance per 2 hours; lactate <2 mmol/L within 6 hours associated with improved survival. Use the lactate clearance target result to inform your calculation.

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