A 14-year-old boy with known nasopharyngeal angiofibroma is scheduled for surgical resection. Preoperative angiography shows a large tumor fed by the maxillary artery and ascending pharyngeal artery. The interventional radiologist has successfully embolized both feeding vessels 36 hours before planned surgery. Intraoperatively, the surgeon encounters significant bleeding from the tumor bed despite embolization. What is the most appropriate immediate management?

Explanation

## Intraoperative Hemorrhage Management in NAF Resection **Key Point:** Despite preoperative embolization, NAF resection may be complicated by bleeding from collateral vessels or residual tumor vascularity. Stepwise hemostatic measures are the first-line response before considering vascular ligation. ### Stepwise Approach to Intraoperative Bleeding | Step | Intervention | Rationale | |------|--------------|----------| | 1 | Gentle pressure with gauze soaked in epinephrine or hydrogen peroxide | Allows time for hemostasis and clot formation | | 2 | Topical hemostatic agents (thrombin, fibrin glue, oxidized cellulose) | Promotes local coagulation without systemic effects | | 3 | Balloon catheter packing (Foley or specialized sinus packs) | Tamponade of bleeding vessels; can be left 24–48 hrs | | 4 | Cautery (bipolar, laser, radiofrequency) | Controlled vessel hemostasis | | 5 | Vascular ligation (ECA, maxillary artery) | Last resort; reserved for uncontrolled hemorrhage | **High-Yield:** Topical hemostatic agents are safe, effective, and avoid the morbidity of vascular ligation (facial ischemia, tissue necrosis). ### Why Avoid External Carotid Artery Ligation? ```mermaid flowchart TD A[Intraoperative bleeding from NAF]:::outcome --> B{Severity?}:::decision B -->|Mild to moderate| C[Topical hemostatics + pressure]:::action B -->|Persistent despite topicals| D[Balloon catheter packing]:::action D --> E[Leave packing 24-48 hrs, restart surgery later]:::action B -->|Severe, life-threatening| F[Consider ECA ligation only if all else fails]:::urgent C --> G[Continue resection safely]:::action E --> G ``` **Clinical Pearl:** External carotid artery ligation causes facial ischemia, tissue necrosis, and potential loss of facial blood supply. It is reserved for truly uncontrolled hemorrhage (rare after embolization) and should not be the first response to moderate bleeding. **Warning:** Injecting epinephrine directly into the tumor bed is not standard practice and may cause systemic absorption and arrhythmias. Topical application on gauze is safer. [cite:Scott-Brown's Otolaryngology 8e Ch 45, Endoscopic Sinus Surgery Ch 12]