A 78-year-old male, known case of diabetes mellitus and hypertension presents with nasal bleeding. The initial management such as packing were not successful in controlling the bleed. Which of the following artery should be ligated to control the bleeding?

Explanation

## Correct Answer: A. Sphenopalatine artery Posterior epistaxis (nosebleed) in elderly patients with comorbidities like diabetes and hypertension is most commonly supplied by the **sphenopalatine artery (SPA)**, a terminal branch of the maxillary artery. When conservative measures (anterior/posterior packing) fail, surgical ligation becomes necessary. The SPA is the gold standard target because it supplies the posterolateral nasal cavity where 90% of posterior bleeds originate. In this 78-year-old with systemic hypertension and diabetes—both risk factors for epistaxis due to vascular fragility and poor hemostasis—the bleeding is almost certainly posterior. SPA ligation via transantral (Caldwell-Luc) or endoscopic sphenopalatine artery ligation (ESPAL) approach is the definitive surgical management when packing fails. This is the most proximal vessel that can be safely ligated without compromising nasal blood supply, as the contralateral SPA and anterior ethmoidal artery maintain adequate perfusion. Indian ENT guidelines and standard otolaryngology practice (as per Bailey & Love) recommend SPA ligation as the first-line surgical intervention for intractable posterior epistaxis. ## Why the other options are wrong **B. Greater Palatine artery** — The greater palatine artery is a smaller branch that supplies the hard palate and anterior palatal mucosa. It does not supply the posterolateral nasal cavity where posterior epistaxis originates. Ligation of this vessel alone would be ineffective for controlling posterior bleeds and is not the standard surgical approach. This is a distractor that confuses palatal supply with nasal supply. **C. Posterior Ethmoidal artery** — The posterior ethmoidal artery supplies the posterior ethmoid sinuses and superior nasal cavity (roof). While it can cause superior/posterior epistaxis, it accounts for only 5–10% of posterior bleeds. It is not the primary source in typical posterior epistaxis. Ligation is reserved for superior/roof bleeds and carries higher risk of orbital complications. The SPA is more commonly involved and safer to ligate. **D. Anterior Ethmoidal artery** — The anterior ethmoidal artery supplies the anterior ethmoid sinuses and anterosuperior nasal cavity. It is responsible for anterior epistaxis, not posterior. In this case, packing has already failed, indicating a posterior source. Anterior ethmoidal ligation is inappropriate for posterior bleeds and would miss the actual bleeding site, making it ineffective. ## High-Yield Facts - **Sphenopalatine artery** supplies 90% of posterior epistaxis sites (posterolateral nasal cavity). - **Posterior epistaxis** in elderly diabetics and hypertensives is the most common presentation requiring surgical intervention. - SPA ligation via **endoscopic sphenopalatine artery ligation (ESPAL)** is now preferred over transantral approach in Indian tertiary centers. - **Anterior ethmoidal artery** controls anterior epistaxis; **posterior ethmoidal** controls superior/roof bleeds—neither is first-line for typical posterior bleeds. - **Packing failure** in posterior epistaxis mandates proximal vessel ligation; SPA is the most proximal safe target without compromising nasal perfusion. ## Mnemonics **POSTERIOR BLEED = SPA** Posterior epistaxis → Sphenopalatine Artery. Anterior bleed → Anterior Ethmoidal. Superior/roof bleed → Posterior Ethmoidal. Remember: SPA is the workhorse for 90% of posterior bleeds. **ESPAL over Packing** When packing FAILS → think ESPAL (Endoscopic Sphenopalatine Artery Ligation). This is the modern Indian standard for intractable posterior epistaxis in elderly patients. ## NBE Trap NBE pairs "nasal bleeding + failed packing" with multiple arterial options to test whether students confuse anterior vs. posterior epistaxis anatomy. The trap is choosing ethmoidal arteries (which supply anterior/superior regions) instead of recognizing that failed packing = posterior bleed = SPA. ## Clinical Pearl In Indian practice, elderly diabetic and hypertensive patients presenting with epistaxis refractory to packing almost always have posterior bleeds from the SPA territory. ESPAL has become the gold standard in metro centers, avoiding the morbidity of transantral approaches. Recognition of "packing failure = posterior = SPA" is critical for preventing unnecessary delays and transfusions in this high-risk population. _Reference: Bailey & Love's Short Practice of Surgery (ENT chapter on epistaxis); Robbins Pathological Basis of Disease (vascular fragility in diabetes and hypertension)_