A patient presents to the emergency with epistaxis. There was no relief on pinching the nostrils. Nasal packing was done but the patient still continues to bleed. What would be the next appropriate step in the management of this patient?

Explanation

## Correct Answer: C. Ligation of sphenopalatine artery Epistaxis refractory to conservative management (pinching) and nasal packing requires vascular intervention. The **sphenopalatine artery (SPA)** is the terminal branch of the maxillary artery and supplies the posterolateral nasal cavity—the site of 90% of posterior epistaxis. When nasal packing fails, SPA ligation is the gold-standard surgical approach in Indian ENT practice because it directly addresses the bleeding source with minimal morbidity. The SPA enters the nasal cavity through the sphenopalatine foramen and divides into lateral nasal and septal branches; ligation proximal to this foramen controls both. Endoscopic transnasal SPA ligation is now preferred over transantral approaches in tertiary centres, but the principle remains: SPA ligation is the next step after failed packing. This is more specific and effective than proximal ligation of the external carotid artery, which sacrifices multiple branches and carries higher morbidity. Internal carotid ligation is contraindicated due to stroke risk and is never used for epistaxis management. ## Why the other options are wrong **A. Ligation of maxillary artery** — While the maxillary artery is the parent vessel of SPA, ligating it proximal to the SPA origin is less specific and may not control all bleeding if collaterals exist. SPA ligation distal to the foramen is more precise and preserves maxillary artery flow to other facial structures. This is a trap for students who know maxillary artery supplies the nose but miss the hierarchy of vascular intervention. **B. Ligation of internal carotid artery** — The internal carotid artery does not supply the nasal cavity and has no role in epistaxis management. Ligation carries catastrophic risk of stroke and cerebral ischaemia. This is a distractor for students who confuse the carotid branches; it tests whether they understand that ICA is purely intracranial/extracranial (brain/eye) supply, not nasal. **D. Ligation of external carotid artery** — ECA ligation is a proximal approach that sacrifices multiple branches (facial, lingual, occipital, posterior auricular) to control one bleeding source. It is reserved for life-threatening haemorrhage when distal ligation fails or is anatomically impossible. For refractory epistaxis post-packing, SPA ligation is more selective and standard in Indian tertiary centres. ## High-Yield Facts - **Sphenopalatine artery** is the terminal branch of maxillary artery and supplies 90% of posterior nasal cavity—the primary source of refractory epistaxis. - **SPA enters via sphenopalatine foramen** and divides into lateral nasal and septal branches; ligation proximal to foramen controls both. - **Nasal packing failure** → next step is SPA ligation (endoscopic transnasal or transantral), NOT proximal ECA ligation. - **Internal carotid artery ligation** is contraindicated in epistaxis due to stroke risk; ICA supplies brain and eye, not nasal cavity. - **Endoscopic transnasal SPA ligation** is now preferred in Indian tertiary centres over transantral approach due to lower morbidity and better visualisation. ## Mnemonics **SPA = Sphenopalatine = Posterior Epistaxis** When nasal packing fails → think **SPA** (not ECA). SPA is the distal, specific target for posterior bleeding. ECA is proximal, non-specific, reserved for life-threat only. **Vascular Hierarchy for Epistaxis** **Pinching → Packing → SPA → ECA → ICA (never)**. Each step is more proximal and more morbid. SPA is the sweet spot after packing fails. ## NBE Trap NBE pairs "failed nasal packing" with "external carotid ligation" to trap students who memorise "ECA controls epistaxis" without understanding the hierarchy of intervention. The question tests whether students know that SPA is the distal, specific target for posterior epistaxis, not the proximal ECA. ## Clinical Pearl In Indian tertiary centres, endoscopic transnasal SPA ligation has largely replaced transantral approaches and external carotid ligation for refractory epistaxis. A patient with posterior bleeding uncontrolled by packing will stop bleeding within hours of SPA ligation, avoiding the morbidity of proximal ECA ligation (facial nerve injury, facial ischaemia) and the catastrophe of ICA ligation. _Reference: Bailey & Love Ch. 38 (Nose and Paranasal Sinuses); Robbins Ch. 16 (Haemostasis)_