cliot (version 1.0.0)

rule_of_7s_lyme: Rule of 7's for Lyme Meningitis

Description

Calculates the Rule of 7's to stratify the risk of Lyme meningitis in children presenting with aseptic meningitis. A patient is classified as "Low Risk" if they meet all three criteria: Headache duration < 7 days, CSF mononuclear cells < 70%, and absence of 7th cranial nerve palsy. Failure of any criterion warrants further investigation for Lyme disease.

Usage

rule_of_7s_lyme(headache_duration_days, csf_mononuclear_percent, seventh_nerve_palsy)

Value

A list containing:

Risk_Classification

"Low Risk" or "Not Low Risk".

Management_Guidance

Clinical suggestions based on the risk level.

Risk_Factors_Present

List of specific criteria that failed the low-risk check.

Arguments

headache_duration_days

Numeric. Duration of headache in days.

csf_mononuclear_percent

Numeric. Percentage of mononuclear cells in the Cerebrospinal Fluid (CSF).

seventh_nerve_palsy

Numeric (0 or 1). Presence of 7th cranial nerve palsy (facial palsy). (1 = Yes).

References

Garro AC, Rutman M, Simonsen K, et al. Prospective validation of a clinical prediction model for Lyme meningitis in children. Pediatrics. 2009;123(5):e829-834. doi:10.1542/peds.2008-2425

Examples

# Example 1: Low Risk
# 3 days headache, 50% monos, No palsy
rule_of_7s_lyme(3, 50, 0)

# Example 2: High Risk (Failed duration and monos)
# 10 days headache, 80% monos, No palsy
rule_of_7s_lyme(10, 80, 0)