cliot (version 1.0.0)

alvarado_appendicitis: 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)

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.

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).

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)