🧪 Lactate Interpretation
Blood lactate cut-offs, type A/B lactic acidosis causes and lactate clearance as a resuscitation and prognosis marker. Browser-side reference.
Type A (hypoperfusion/hypoxia) is most common, but check type B causes.
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When to use
Interpret an elevated lactate, distinguish type A (hypoperfusion) from type B causes, and use clearance to guide resuscitation.
How it works
Normal < 2, elevated > 2, severe > 4 mmol/L. Sepsis resuscitation target: ≥ 10–20% clearance over 2–6 h.
Key points
- Type A (hypoperfusion/hypoxia) is most common, but check type B causes.
- Type B: liver failure, metformin (MALA), thiamine deficiency, toxins.
- > 4 mmol/L flags high risk in sepsis/shock.
- Process samples promptly to avoid spuriously high values.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| View | Cut-offs |
|---|
→LactateLactate cut-offs
- Normal：< 2 mmol/L
- Elevated：> 2 mmol/L
- Severe：> 4 mmol/L (high-risk in sepsis/shock, start resuscitation)
| View | Clearance/resuscitation |
|---|
→LactateClearance / resuscitation
- Resuscitation target：In sepsis, a falling lactate is a resuscitation target (e.g. ≥ 10–20% clearance over 2–6 h)
- Prognosis：Persistently high lactate / poor clearance suggests a worse prognosis
- Caution：Judge alongside perfusion signs (urine output, capillary refill, ScvO₂)
Frequently asked questions
- What is Lactate Interpretation?
- Blood lactate cut-offs, type A/B lactic acidosis causes and lactate clearance as a resuscitation and prognosis marker. Browser-side reference.
- How is Lactate Interpretation calculated? What is the core formula?
- Normal < 2, elevated > 2, severe > 4 mmol/L. Sepsis resuscitation target: ≥ 10–20% clearance over 2–6 h.
- When is Lactate Interpretation used?
- Interpret an elevated lactate, distinguish type A (hypoperfusion) from type B causes, and use clearance to guide resuscitation.
- What are the key clinical points for Lactate Interpretation?
- Type A (hypoperfusion/hypoxia) is most common, but check type B causes. Type B: liver failure, metformin (MALA), thiamine deficiency, toxins. > 4 mmol/L flags high risk in sepsis/shock. Process samples promptly to avoid spuriously high values.
- What are the limits and cautions when using Lactate Interpretation?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Lactate Interpretation calculated in practice? Can you show a worked example?
- Inputs: View Cut-offs → Result: Lactate Lactate cut-offs（Normal: < 2 mmol/L, Elevated: > 2 mmol/L, Severe: > 4 mmol/L (high-risk in sepsis/shock, start resuscitation)） Inputs: View Clearance/resuscitation → Result: Lactate Clearance / resuscitation（Resuscitation target: In sepsis, a falling lactate is a resuscitation target (e.g. ≥ 10–20% clearance over 2–6 h), Prognosis: Persistently high lactate / poor clearance suggests a worse prognosis, Caution: Judge alongside perfusion signs (urine output, capillary refill, ScvO₂)）