Tokyo guidelines 2018 (TG18) for acute cholangitis and cholecystitis

I would suggest you to include the TG13 (Tokyo Cholangitis and Cholecystitis 2013) to your formulas. Their definition and classification is widely used and accepted worldwide.
Thanks.

Critérios baseados no Tokyo Guideline 2013 para diagnóstico e conduta na Colecistite aguda e colangite.

Tool to help diagnose acute cholangitis

TG13: Updated Tokyo guidelines for Management of Acute Cholangitis and Acute Cholecystitis

available free in: http://www.jshbps.jp/en/guideline/tg13.html