American Association of Critical-Care Nurses (AACN) Certification Practice Test

What lactate level indicates hyperlactatemia?

1. Less than 2 mmol/L

2. 2-4 mmol/L

3. More than 2 mmol/L

4. More than 4 mmol/L

The correct answer is: More than 2 mmol/L

Hyperlactatemia is defined as an elevated level of lactate in the blood, which can indicate anaerobic metabolism or tissue hypoxia. The threshold for defining hyperlactatemia is typically set at greater than 2 mmol/L. Lactate levels between 2-4 mmol/L signify mild to moderate cases of hyperlactatemia, often associated with conditions that induce increased lactate production. Levels above 4 mmol/L indicate a more severe form of elevated lactate, often associated with significant metabolic stress or shock. Thus, identifying a lactate level of more than 2 mmol/L as hyperlactatemia allows healthcare professionals to recognize when interventions may be necessary to address potential underlying conditions affecting oxygen delivery and utilization in the body. This helps in timely management and improving patient outcomes in critically ill patients.