- In addition, the patient is also monitored for bleeding complications, hematoma under the flap, infection... Treatment after surgery - General: - Anti-infection: - Postoperative pain relief: - Drugs to prevent thromboembolism: Use enoxaparin sodium, especially, the drug is Lovernox 40mg/0.4ml (Sanofi Aventis Intercontinental - France) with the adult dose of Lovernox 40mg/0.4ml twice a day, 0.2ml injected subcutaneously every 12 hours, for 3 - 5 days.