1. What is Neutrophil Lymphocyte Ratio?

The Neutrophil Lymphocyte Ratio (NLR) is a simple marker of systemic inflammation calculated by dividing the absolute neutrophil count by the absolute lymphocyte count. It serves as a prognostic indicator in various medical conditions.

2. How Does the Calculator Work?

The calculator uses the NLR formula:

Where:

• \( ANC \) — Absolute Neutrophil Count (cells/μL)
• \( ALC \) — Absolute Lymphocyte Count (cells/μL)

Explanation: The ratio provides insight into the balance between the innate immune response (neutrophils) and adaptive immune response (lymphocytes).

3. Importance of NLR Calculation

Details: NLR is used as a prognostic marker in various conditions including infections, cardiovascular diseases, cancers, and inflammatory disorders. Higher ratios often indicate more severe inflammation.

4. Using the Calculator

Tips: Enter both absolute neutrophil count and absolute lymphocyte count in cells/μL. Both values must be valid (greater than 0).

5. Frequently Asked Questions (FAQ)

Q1: What is a normal NLR value?
A: Normal NLR values typically range from 1-3, though this can vary depending on the laboratory and population.

Q2: What does a high NLR indicate?
A: Elevated NLR may indicate increased systemic inflammation, infection, stress response, or worse prognosis in various diseases.

Q3: When is NLR most commonly used?
A: NLR is frequently used in emergency medicine, oncology, cardiology, and critical care settings as a quick prognostic indicator.

Q4: Are there limitations to NLR?
A: NLR should be interpreted in clinical context as it can be affected by various factors including medications, recent infections, and other comorbidities.

Q5: How often should NLR be monitored?
A: Monitoring frequency depends on the clinical situation. In acute settings, it may be monitored daily, while in chronic conditions, less frequent monitoring may be appropriate.