1. What is Neutrophil To Lymphocyte Ratio?

The Neutrophil To Lymphocyte Ratio (NLR) is a simple biomarker calculated from a complete blood count. It represents the ratio of neutrophil count to lymphocyte count and is used as a marker of systemic inflammation.

2. How Does the Calculator Work?

The calculator uses the NLR formula:

Where:

• \( Neutrophils \) — Absolute neutrophil count (cells/µL)
• \( Lymphocytes \) — Absolute lymphocyte count (cells/µL)

Explanation: The ratio is calculated by dividing the absolute neutrophil count by the absolute lymphocyte count from a complete blood count test.

3. Importance of NLR Calculation

Details: NLR is a valuable prognostic marker in various conditions including cardiovascular diseases, cancers, infections, and inflammatory disorders. Higher NLR values typically indicate greater systemic inflammation.

4. Using the Calculator

Tips: Enter both neutrophil and lymphocyte counts in cells/µL. Both values must be greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal NLR value?
A: Typically, a normal NLR ranges from 1-3, though this can vary slightly between populations and laboratories.

Q2: What does a high NLR indicate?
A: Elevated NLR values may indicate increased systemic inflammation, infection, stress response, or may be associated with various disease states.

Q3: When should NLR be measured?
A: NLR is typically calculated from routine complete blood count tests and can be useful in various clinical contexts including preoperative assessment and monitoring chronic inflammatory conditions.

Q4: Are there limitations to NLR?
A: While NLR is a useful marker, it should be interpreted in clinical context alongside other laboratory findings and patient symptoms.

Q5: Can NLR be used alone for diagnosis?
A: No, NLR is a supportive marker and should not be used as a standalone diagnostic tool. It should be interpreted alongside other clinical findings.