“…21 The remaining patients received C1-INH before various other (i.e., cardiopulmonary bypass, septal deviation, eye, and abortion) or unspecified surgical interventions. 18,23,24,33,44,71,72,[83][84][85][86] In a retrospective and prospective cohort study, two patients received C1-INH prophylactically 30 minutes before surgery (one dental and multiple abdominal surgeries, respectively), and in both patients there were no HAE-associated complications during or after the surgery. 13 In a retrospective cohort study that evaluated 705 tooth extractions in 171 patients with HAE-C1-INH, the rate of facial swelling and/or life-threatening laryngeal edema was 21.5% for 577 extractions without prophylaxis compared with 12.5% for 138 extractions with prophylaxis.…”