cliot (version 1.0.0)

lams_stroke_score: Los Angeles Motor Scale (LAMS)

Description

Calculates the LAMS score, a prehospital stroke severity scale designed to identify patients with Large Vessel Occlusion (LVO) who may benefit from endovascular thrombectomy. The score assesses three motor domains: Facial Droop, Arm Drift, and Grip Strength.

Usage

lams_stroke_score(facial_droop, arm_drift, grip_strength)

Value

A list containing:

LAMS_Score

The calculated total score (Range 0-5).

Likelihood_LVO

Interpretation of LVO risk (Score >= 4 typically suggests LVO).

Recommendation

Triage guidance regarding hospital destination.

Arguments

facial_droop

Numeric (0 or 1). 0: Absent. 1: Present.

arm_drift

Numeric (0-2). 0: Absent. 1: Drifts down. 2: Falls rapidly.

grip_strength

Numeric (0-2). 0: Normal. 1: Weak grip. 2: No grip.

References

Llanes JN, Kidwell CS, Starkman S, et al. The Los Angeles Motor Scale (LAMS): a new measure to characterize stroke severity in the field. Prehosp Emerg Care. 2004;8(1):46-50. doi:10.1080/312703002806

Examples

# Example 1: High Risk for LVO
# Facial droop (1), Arm falls rapidly (2), No grip (2)
# Score = 5
lams_stroke_score(1, 2, 2)

# Example 2: Low Risk for LVO
# Facial droop (1), No arm drift (0), Normal grip (0)
# Score = 1
lams_stroke_score(1, 0, 0)