Murray Lung Injury Score Calculator

Overview

Quantifies acute lung injury from chest radiograph, hypoxaemia, PEEP and respiratory-system compliance.

Clinical Significance

0 indicates no lung injury; 0.1–2.5 mild-to-moderate injury and >2.5 severe lung injury.

When to Use

• Use as structured clinical decision support when the required data are available and reliable.

How It Is Calculated

• The displayed variables are combined using the published equation, decision rule or weighted point system.

Interpretation

• 0 indicates no lung injury; 0.1–2.5 mild-to-moderate injury and >2.5 severe lung injury.

Worked Example

Enter verified patient data in the displayed units; MedicalC applies the published model.

Limitations

• Risk and classification tools can be misapplied outside their validated population.
• Missing, estimated or non-contemporaneous data may materially change the result.

Clinical Pearls

• Document the input values, units, date and clinical setting with the result.
• Use serial scores only when the same instrument and measurement method are used consistently.

Common Mistakes

• Using the tool without confirming entry criteria.
• Using approximate or incorrectly converted laboratory values.
• Treating a prognostic score as a standalone treatment decision.

References

1. Murray JF et al. Am Rev Respir Dis. 1988;138:720-723. — Primary or supporting reference for the implemented model.