Complement 1 esterase inhibitor (C1-INH) Deficiency Testing Algorithm INDICATIONS FOR TESTING: • Recurrent angioedema (without urticaria) • Recurrent episodes of abdominal pain and vomitting • Laryngeal edema • Positive family history for angioedema ARUPConsult @ARUPLabs #C1INH #Complement #esterase #inhibitor #Deficiency #Testing #Algorithm #allergy #diagnosis