Rule_of_7s_for_lyme_meningitis v.1

Rule of 7s for Lyme meningitis is an assessment tool used for patients with risk factors for Lyme meningitis and distinguishes it from aseptic meningitis.

Therese Lindberg

therese.lindberg@cambio.se

Cambio CDS

To calculate the Rule of 7s score and assess the risk of Lyme meningitis.

Use in pediatric patients in a Lyme endemic area to decide on starting the antibiotics. The rule of 7s is calculated based on three parameters: number of days of headache, CSF mononuclear cells and 7th (or other) cranial nerve palsy. Rule of 7s Risk 0 points Low risk for Lyme meningitis 1–3 points Not low risk for Lyme meningitis

Not to be used in other patients than in pediatric patients (2-18 years).

1. Garro AC, Rutman M, Simonsen K, Jaeger JL, Chapin K, Lockhart G. Prospective validation of a clinical prediction model for Lyme meningitis in children. Pediatrics. 2009 May;123(5):e829-34. doi: 10.1542/peds.2008-2048. PMID: 19403476.

OBSERVATION.rule_of_7s.v0, EVALUATION.rule_of_7s_assessment.v0