alvarado_appendicitis: Alvarado Score for Acute Appendicitis

In cliot: Clinical Indices and Outcomes Tools

Alvarado Score for Acute Appendicitis

Description

Calculates the Alvarado Score (also known as the MANTRELS score) to stratify the risk of acute appendicitis in patients presenting with abdominal pain. The score uses clinical symptoms, physical exam findings, and laboratory values to categorize patients into Low, Moderate, or High risk groups, helping to guide decisions regarding imaging (CT) and surgical consultation.

Usage

alvarado_appendicitis(migratory_pain, anorexia, nausea_vomiting, rlq_tenderness,
                      rebound_tenderness, elevated_temp, leukocytosis, shift_left)

Arguments

migratory_pain	Numeric (0 or 1). Migration of pain to the right lower quadrant. (1 = Yes, +1 point).
anorexia	Numeric (0 or 1). Anorexia or ketones in urine. (1 = Yes, +1 point).
nausea_vomiting	Numeric (0 or 1). Nausea or vomiting. (1 = Yes, +1 point).
rlq_tenderness	Numeric (0 or 1). Tenderness in the right lower quadrant. (1 = Yes, +2 points).
rebound_tenderness	Numeric (0 or 1). Rebound tenderness. (1 = Yes, +1 point).
elevated_temp	Numeric (0 or 1). Temperature >= 37.3 C (99.1 F). (1 = Yes, +1 point).
leukocytosis	Numeric (0 or 1). Leukocytosis > 10,000 /uL. (1 = Yes, +2 points).
shift_left	Numeric (0 or 1). Shift to the left (neutrophils > 75%). (1 = Yes, +1 point).

Value

A list containing:

Total_Score	The sum of the weighted criteria (Range 0-10).
Risk_Group	Risk classification (Low 0-3, Moderate 4-6, High 7-10).
Recommendation	Clinical guidance based on the risk group.

References

Alvarado A. A practical score for the early diagnosis of acute appendicitis. Ann Emerg Med. 1986;15(5):557-564. doi:10.1016/s0196-0644(86)80993-3

Examples

# Example 1: High Risk (Surgical Candidate)
# Migratory pain, Nausea, RLQ Tenderness (2), Rebound, Fever, Leukocytosis (2)
# Score = 1 + 1 + 2 + 1 + 1 + 2 = 8
alvarado_appendicitis(1, 0, 1, 1, 1, 1, 1, 0)

# Example 2: Low Risk
# Nausea only
# Score = 1
alvarado_appendicitis(0, 0, 1, 0, 0, 0, 0, 0)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.