LEARN ABOUT EPISTAXIS: WHY NOSEBLEEDS OCCUR AND HOW TO RECOGNIZE THEM

Definition of Epistaxis

Epistaxis is defined as hemorrhage from the nose, stemming from the nasal cavity or nasopharynx. It is a common medical complaint, affecting individuals of all ages, and can range from a minor inconvenience to a life-threatening emergency requiring immediate medical intervention. While often benign and self-limiting, recurrent or severe epistaxis warrants thorough investigation to identify and manage underlying causes.

Anatomy of the Nasal Septum and its Vascular Supply

A detailed understanding of the nasal septum’s anatomy, particularly its intricate vascular network, is paramount to comprehending the pathogenesis and management of epistaxis. The nasal septum is a cartilaginous and bony wall that divides the nasal cavity into two halves.

• Structural Components:
  • Anteriorly: Composed primarily of the quadrangular cartilage.
  • Posteriorly and Superiorly: Formed by the perpendicular plate of the ethmoid bone.
  • Inferiorly: Formed by the vomer bone.
  • The bony and cartilaginous parts are covered by a highly vascularized mucoperichondrial and mucoperiosteal lining.
• Blood Supply: The rich vascularity of the nasal septum is derived from branches of both the internal and external carotid arterial systems, forming an anastomotic network that is particularly vulnerable to rupture.
  • External Carotid Artery (ECA) Contributions:
    • Sphenopalatine Artery: A terminal branch of the maxillary artery (itself a branch of the ECA), it is the primary blood supply to the posterior and inferior nasal cavity and septum. It enters the nasal cavity through the sphenopalatine foramen.
    • Greater Palatine Artery: Also a branch of the maxillary artery, it reaches the septum through the incisive canal.
    • Superior Labial Artery: A branch of the facial artery, contributing to the anterior septum.
  • Internal Carotid Artery (ICA) Contributions:
    • Anterior Ethmoidal Artery: A branch of the ophthalmic artery (from the ICA), it supplies the superior and anterior parts of the septum and lateral nasal wall. It enters the nasal cavity via the anterior ethmoidal foramen.
    • Posterior Ethmoidal Artery: Also a branch of the ophthalmic artery, it supplies the superior and posterior parts of the septum and lateral nasal wall. It enters via the posterior ethmoidal foramen.
  • Key Anastomotic Areas:
    • Kiesselbach’s Plexus (Little’s Area): This is the most common site of anterior epistaxis, located on the anteroinferior part of the nasal septum. It is a highly vascularized area where branches from the anterior ethmoidal artery, sphenopalatine artery, greater palatine artery, and superior labial artery converge and anastomose. Its superficial location and exposure to trauma make it particularly susceptible to bleeding.
    • Woodruff’s Plexus: Located on the posterior-lateral wall of the inferior meatus, this plexus is formed by anastomoses of the sphenopalatine artery and ascending pharyngeal artery branches. It is a common site for posterior epistaxis, which can be more profuse and challenging to control due to the larger caliber of the vessels involved.

Sites of Epistaxis

Epistaxis is broadly classified based on its anatomical origin, which guides management strategies:

• Anterior Epistaxis: Accounts for approximately 90% of all nosebleeds. It typically originates from Kiesselbach’s plexus on the anterior nasal septum. Bleeding is usually visible, flows out of the anterior nares, and is often less severe, responding well to direct pressure.
• Posterior Epistaxis: Less common but often more severe, originating from vessels deep within the nasal cavity or nasopharynx. The most frequent site is Woodruff’s plexus on the posterior-lateral nasal wall. Blood may flow posteriorly into the pharynx and be swallowed or coughed up, making it appear as hematemesis or hemoptysis. This type of bleeding usually requires medical intervention and may necessitate hospitalization.
• Superior Epistaxis: Less common, originating from the anterior or posterior ethmoidal arteries in the superior part of the nasal cavity.
• Diffuse Epistaxis: Bleeding from multiple sites or a generalized ooze, often associated with systemic coagulopathies or severe nasal inflammation.

Causes of Epistaxis

The causes of epistaxis are diverse and can be broadly categorized into local factors affecting the nasal cavity, and systemic factors affecting the body as a whole:

A. Local Causes:

• Trauma:
  • Nose Picking (Digital Trauma): The most common cause, especially in children.
  • Foreign Bodies: Objects inserted into the nasal cavity, particularly in children.
  • Nasal Fractures/Facial Trauma: Direct injury to nasal bones and blood vessels.
  • Surgical Trauma: Post-operative bleeding following nasal or sinus surgery.
  • Nasal Packing/Intubation: Irritation or injury from medical devices.
• Inflammation/Infection:
  • Acute Rhinitis (Common Cold): Inflammation and increased vascularity.
  • Chronic Rhinosinusitis: Persistent inflammation, mucosal changes.
  • Allergic Rhinitis: Inflammation and irritation from allergens.
  • Vestibulitis: Infection of the nasal vestibule.
• Septal Abnormalities:
  • Deviated Nasal Septum: Turbulent airflow can dry out and irritate mucosa, leading to bleeding.
  • Septal Perforation: Dryness and crusting around the edges of the perforation can cause bleeding.
• Environmental Factors:
  • Dry Air/Low Humidity: Dries out nasal mucosa, causing cracking and bleeding. Common in arid climates or heated indoor environments.
  • Irritant Exposure: Chemical fumes, smoke.
• Nasal Tumors (Benign or Malignant):
  • Juvenile Nasopharyngeal Angiofibroma: Highly vascular, benign tumor commonly seen in adolescent males, notorious for severe epistaxis.
  • Squamous Cell Carcinoma, Adenocarcinoma, Esthesioneuroblastoma: Malignant tumors of the nasal cavity or paranasal sinuses.
• Vascular Malformations:
  • Telangiectasias: Dilated blood vessels, often seen in Hereditary Hemorrhagic Telangiectasia (Osler-Weber-Rendu disease).
• Medication-Induced (Topical): Overuse of topical decongestants, nasal steroids (less common).

B. Systemic Causes:

• Hypertension (High Blood Pressure): While rarely a direct cause of epistaxis, uncontrolled hypertension can exacerbate bleeding and make it more difficult to control by increasing arterial pressure.
• Coagulopathies (Bleeding Disorders):
  • Inherited: Hemophilia A & B, Von Willebrand disease, platelet function disorders.
  • Acquired:
    • Anticoagulant Medications: Warfarin, heparin, direct oral anticoagulants (DOACs like dabigatran, rivaroxaban, apixaban).
    • Antiplatelet Medications: Aspirin, clopidogrel.
    • Liver Disease: Impaired synthesis of clotting factors.
    • Kidney Failure (Uremia): Platelet dysfunction.
    • Thrombocytopenia: Low platelet count due to various conditions (e.g., ITP, leukemia, chemotherapy).
    • Disseminated Intravascular Coagulation (DIC).
• Infections:
  • Acute Febrile Illnesses: Influenza, measles, typhoid fever (due to vascular fragility).
• Vascular Disorders:
  • Atherosclerosis: Hardening and narrowing of arteries, can affect nasal vessels.
• Nutritional Deficiencies:
  • Vitamin C Deficiency (Scurvy): Impaired collagen synthesis, fragile capillaries.
  • Vitamin K Deficiency: Impaired synthesis of clotting factors II, VII, IX, X.
• Systemic Diseases:
  • Heart Failure: Increased venous pressure.
  • Alcohol Abuse: Liver dysfunction, platelet abnormalities.
• Idiopathic: In many cases, especially recurrent anterior epistaxis, no specific cause can be identified.

Step-Wise Management Protocol for Epistaxis

The management of epistaxis follows a systematic approach, progressing from immediate first aid to advanced medical and potentially surgical interventions, with a focus on controlling bleeding and addressing underlying causes.

A. Initial First Aid (Patient/Caregiver Level):

1. Reassurance: Calm the individual, especially children, as anxiety can raise blood pressure.
2. Positioning: Sit upright, leaning slightly forward. This prevents blood from flowing down the throat, which can cause nausea, vomiting, or airway compromise, and reduces venous pressure in the head.
3. Direct Pressure: Pinch the soft, fleshy part of both nostrils firmly together, continuously, for 10-15 minutes. This compresses Kiesselbach’s plexus. Breathe through the mouth.
4. Cold Compress: Apply an ice pack or cold compress to the bridge of the nose and the nape of the neck. This may cause vasoconstriction.
5. Avoidance: Instruct the patient not to lie down, tilt their head back, blow their nose forcefully, or pick at the nose for several hours after bleeding stops.
6. When to Seek Medical Help: If bleeding does not stop after 15-20 minutes of continuous pressure, if bleeding is profuse, if the patient is dizzy, weak, or feeling faint, if bleeding recurs frequently, or if associated with head trauma.

B. Medical Management (Healthcare Professional Level):

I. Initial Assessment and Preparation:

1. Safety First: Don personal protective equipment (gloves, gown, eye protection).
2. ABCs: Assess airway, breathing, and circulation. Stabilize the patient if necessary (e.g., IV fluid resuscitation for hypovolemia).
3. Vitals: Monitor blood pressure, heart rate, and oxygen saturation.
4. History: Obtain a focused history: onset, duration, frequency, estimated blood loss, side of bleeding, associated symptoms, current medications (especially anticoagulants/antiplatelets), past medical history (hypertension, bleeding disorders, liver disease), previous epistaxis episodes and treatments.
5. Preparation: Good lighting (headlamp), suction, nasal speculum, bayonet forceps, topical vasoconstrictors/anesthetics (e.g., oxymetazoline, phenylephrine, lidocaine spray), silver nitrate sticks, packing materials.

II. Localization and Control of Bleeding:

1. Clear the Nose: Gently suction or ask the patient to blow out any clots or blood, after topical vasoconstriction. This allows for better visualization.
2. Topical Anesthesia and Vasoconstriction: Apply cotton pledgets soaked in a solution of topical anesthetic (e.g., 4% lidocaine) mixed with a vasoconstrictor (e.g., 0.05% oxymetazoline or 1:1000 adrenaline) to the bleeding site for 5-10 minutes. This provides anesthesia, reduces bleeding, and improves visualization.
3. Identify Bleeding Site: If bleeding is less active, careful examination with a nasal speculum and light can identify the source.
4. Control Measures:
   • A. Anterior Epistaxis (Most Common):
     • Cautery (If visible source):
       • Chemical Cautery: Silver nitrate sticks are commonly used for focal bleeding points. Apply the stick firmly to the bleeding vessel for 5-10 seconds until the area turns gray. Cauterize one side of the septum at a time to prevent septal perforation.
       • Electrocautery: If chemical cautery fails or for larger anterior vessels, bipolar electrocautery can be used cautiously.
     • Anterior Nasal Packing (If cautery fails or diffuse anterior bleed):
       • Absorbable Packing: Materials like Surgicel®, Gelfoam®, Floseal®, or NasoPore® are placed in the nasal cavity. They expand, provide pressure, and aid clot formation. They dissolve over time.
       • Non-Absorbable Packing:
         • Nasal Tampons: Compressed sponges (e.g., Merocel®, Rhino Rocket®) that expand when moistened, providing firm pressure.
         • Balloon Catheters: Single-balloon devices specifically designed for anterior packing.
         • Gauze Packing: Layered petroleum jelly-impregnated gauze (e.g., Vaseline gauze) carefully placed in layers from the floor of the nose upwards to fill the cavity. This provides significant pressure.
       • Duration of Packing: Typically left in place for 24-72 hours. Prophylactic antibiotics are often prescribed to prevent toxic shock syndrome or sinusitis with non-absorbable packing.
   • B. Posterior Epistaxis (More Challenging):
     • Often requires hospitalization and possibly consultation with an Ear, Nose, and Throat (ENT) specialist.
     • Posterior Nasal Packing: Achieved using specialized balloon catheters (e.g., Epistat®, Rapid Rhino® posterior balloon) or a Foley catheter. The balloon is inflated in the nasopharynx to provide posterior pressure, and a second anterior balloon or anterior packing can be used to secure it in place and tamponade the anterior aspect.
     • Risks: Posterior packing can compromise the airway, cause significant discomfort, hypoxia, and vagal reactions (bradycardia, hypotension). Close monitoring is essential.
     • Surgical Intervention (for refractory cases):
       • Endoscopic Sphenopalatine Artery Ligation (ESPAL): The most common surgical procedure. Performed endoscopically, the sphenopalatine artery is identified and ligated or clipped, effectively cutting off the main blood supply to the posterior nose. High success rate.
       • Ethmoidal Artery Ligation: For superior bleeds, the anterior and/or posterior ethmoidal arteries can be ligated via external approaches (e.g., external ethmoidectomy incision).
       • External Carotid Artery Ligation: A last resort for diffuse, severe bleeding not controlled by other methods.
       • Septal Dermoplasty: Rarely used for severe, recurrent hereditary hemorrhagic telangiectasia.
     • Interventional Radiology (for refractory cases):
       • Angiographic Embolization: Radiologists can selectively embolize (block) bleeding vessels (typically branches of the external carotid artery) using coils or embolic agents. This is an option when surgical ligation is not feasible or fails, but carries risks of stroke or vision loss.

III. Post-Management Care and Patient Education:

1. Observation: Monitor vital signs, bleeding, and patient comfort.
2. Medications:
   • Antibiotics: Often prescribed with non-absorbable nasal packing to prevent infection (e.g., Staphylococcus aureus, sinusitis).
   • Pain Relief: Analgesics as needed.
   • Antihypertensives: Adjust or initiate medication if hypertension is a contributing factor.
3. Patient Education:
   • Avoidance: Emphasize avoiding nose picking, vigorous nose blowing, straining, heavy lifting, stooping, hot showers, and hot beverages for several days to weeks.
   • Medication Review: Advise against aspirin, NSAIDs, and other blood thinners unless medically necessary and with physician approval.
   • Nasal Hygiene: Use saline nasal sprays or gels to keep nasal mucosa moist, especially in dry environments. Consider a humidifier at home.
   • Head Elevation: Sleep with the head elevated.
   • Follow-up: Schedule follow-up appointments for packing removal (if applicable) and re-evaluation. Discuss long-term strategies for recurrent epistaxis.

IV. Addressing Underlying Causes:

1. Laboratory Investigations:
   • Complete Blood Count (CBC): To assess for anemia and platelet count.
   • Coagulation Profile: Prothrombin time (PT), international normalized ratio (INR), activated partial thromboplastin time (aPTT) to evaluate for bleeding disorders or monitor anticoagulant therapy.
   • Kidney and Liver Function Tests: If systemic disease is suspected.
2. Medication Review: Thoroughly review all patient medications, particularly those affecting coagulation. Adjust dosages or consider alternatives in consultation with the prescribing physician.
3. Management of Systemic Conditions: Optimal control of hypertension, diabetes, and other systemic diseases is crucial.
4. Consultations: Refer to hematology for undiagnosed bleeding disorders, internal medicine for systemic illnesses, or oncology for suspected tumors.

Epistaxis, while common, requires a systematic and professional approach to ensure effective control of bleeding and comprehensive management of its underlying causes. A thorough understanding of nasal anatomy, potential etiologies, and a step-wise management protocol are essential for optimal patient outcomes.