Alvarado Score (MANTRELS 0–10) for Acute Appendicitis Probability Calculator

Tally the 10-point MANTRELS Alvarado score to stratify appendicitis probability.

Alvarado (MANTRELS) Score
7 points (0–10)
Clinical Signs + Symptoms Subscore 5 pts (max 7)
Laboratory Leukocytosis Subscore 2 pts (max 3)
Margin vs. Surgical Threshold (7) 0 pts
Inputs
⚡ Scenarios:
pts (0–3)
Symptoms sum (Migration to RLQ [1] + Anorexia [1] + Nausea/Vomiting [1], max 3).
pts (0–4)
Signs sum (RLQ Tenderness [2] + Rebound pain [1] + Temp ≥37.3°C [1], max 4).
pts (0–3)
Lab sum (Leukocytosis WBC >10,000/μL [2] + Neutrophil left shift >75% [1], max 3).
Results & Graph
Alvarado (MANTRELS) Score
7 points (0–10)
Clinical Signs + Symptoms Subscore
5 pts (max 7)
Laboratory Leukocytosis Subscore
2 pts (max 3)
Margin vs. Surgical Threshold (7)
0 pts

Alvarado (MANTRELS) Score

Graph 1 • Alvarado Appendicitis Score • Domain Architecture & Live Telemetry Maps Symptom Points Max3, Sign Points Max4, Lab Points Max3 through Alvarado Appendicitis Score Formula.
Alvarado Score (MANTRELS 0–10) for Acute Appendicitis Probability Calculator • Custom Domain Schematic (Neurology, Trauma & Emergency) Clinical Zone & Dose Response (symptomP, signPoin) Symptom Points Max3: 2 pts (0–3) • Sign Points Max4: 3 pts (0–4) ALVARADO (MANTRELS) SCORE 7 points (0–10) • Clinical Signs + Sympt: 5 pts (max 7) • Laboratory Leukocytosi: 2 pts (max 3) Eq: Alvarado = Symptoms (Migration 1
Graph 2 • Alvarado (MANTRELS) Score Across Symptom Points Max3 Sweep (40% → 160%) Evaluates Alvarado = Symptoms (Migration 1 + Anorexia 1 + Nausea 1) + Signs (RLQ T across 7 operating points (current input highlighted).
0 points 4.40 points 8.80 points 5.80 0.800 6.20 1.20 6.60 1.60 7 2 7.40 2.40 7.80 2.80 8 3.20
Graph 3 • Joint Sensitivity: Symptom Points Max3 × Sign Points Max4 Compares Alvarado (MANTRELS) Score when Sign Points Max4 is shifted +25% (solid) vs. −25% (dashed).
0 points 4.59 points 9.19 points --- Sign Points Max4 @ 75% 7.15 -30% 7.45 -15% 7.75 +0% 8.05 +15% 8.35 +30%
Summary: Alvarado MANTRELS score is 7/10 (High Probability of Appendicitis (7–10)).
Summary: Alvarado MANTRELS score is 7/10 (High Probability of Appendicitis (7–10)).
⚡ Send result to: BMI →Calorie & TDEE →Pace, 1RM & HR Zones →
Interactive chart & math engine powered by CalculatorGraph

Formula & Mathematical Methodology: Alvarado Appendicitis Score Formula

Alvarado = Symptoms (Migration 1 + Anorexia 1 + Nausea 1) + Signs (RLQ Tenderness 2 + Rebound 1 + Temp 1) + Labs (WBC>10k 2 + LeftShift 1)
Alvarado = Symptoms (Migration 1 + Anorexia 1 + Nausea 1) + Signs (RLQ Tenderness 2 + Rebound 1 + Temp 1) + Labs (WBC>10k 2 + LeftShift 1)
  • symptomPointsMax3: Symptom Points Max3 (pts (0–3))
  • signPointsMax4: Sign Points Max4 (pts (0–4))
  • labPointsMax3: Lab Points Max3 (pts (0–3))

Rounding: Clinical scores round to statutory integer or decimal precision; physiological metrics round to 2 decimal places.

Worked Example: Clinical / Physiology Scenario: Alvarado Appendicitis Score

Tally the 10-point MANTRELS Alvarado score to stratify appendicitis probability.

  1. Enter lab values, anthropometric measurements, or performance test metrics.
  2. Evaluate the reference equation: Alvarado = Symptoms (Migration 1 + Anorexia 1 + Nausea 1) + Signs (RLQ Tenderness 2 + Rebound 1 + Temp 1) + Labs (WBC>10k 2 + LeftShift 1).
  3. Inspect the primary classification, supporting indices, and 3 SVG charts.
Result: Computes Alvarado Appendicitis Score via Alvarado = Symptoms (Migration 1 + Anorexia 1 + Nausea 1) + Signs (RLQ Tenderness 2 + Rebound 1 + Temp 1) + Labs (WBC>10k 2 + LeftShift 1).

Frequently Asked Questions

How does the Alvarado Score (MANTRELS 0–10) for Acute Appendicitis Probability Calculator compute its result?

It evaluates Alvarado = Symptoms (Migration 1 + Anorexia 1 + Nausea 1) + Signs (RLQ Tenderness 2 + Rebound 1 + Temp 1) + Labs (WBC>10k 2 + LeftShift 1) directly in your browser and updates three custom SVG visualizations in real time.

Can I use Goal Seek to solve backwards for a target lab value or pace?

Yes. Click "🎯 Goal Seek" in the results toolbar to solve backwards for any numeric input parameter.

Are my health and biometric inputs kept private?

Yes. All calculations run 100% locally on your device with zero external transmission.

Health & Fitness · Neurology, Trauma & Emergency

Alvarado Score (MANTRELS 0–10) for Acute Appendicitis Probability Calculator: inputs, method, and how to read the result

Tally the 10-point MANTRELS Alvarado score to stratify appendicitis probability.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Symptom Points Max3: Symptoms sum (Migration to RLQ [1] + Anorexia [1] + Nausea/Vomiting [1], max 3).
  • Sign Points Max4: Signs sum (RLQ Tenderness [2] + Rebound pain [1] + Temp ≥37.3°C [1], max 4).
  • Lab Points Max3: Lab sum (Leukocytosis WBC >10,000/μL [2] + Neutrophil left shift >75% [1], max 3).

What the calculation includes

With the default values shown, Alvarado (MANTRELS) Score is 7 points (0–10). The calculation follows Alvarado Appendicitis Score Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Symptom Points Max3 from 2 pts (0–3) to 2.2 pts (0–3) changes Alvarado (MANTRELS) Score from 7 points (0–10) to 7.2 points (0–10). This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses peer-reviewed clinical and sports physiology formulas.
  • For educational and informational reference only; clinical scores do not replace physician judgment or laboratory reference ranges.

Scope: Global Clinical & Sports Science Consensus Check the assumptions and limitations against your situation before relying on the estimate.

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