Comprehensive EENT Exam 1: Clinical Study of the Nose and Rhinitis

Overview of Nasal Symptoms

• Rhinorrhea: Defined as mucus drainage from the nose. It is a primary clinical indicator during an examination.
• Nasal Congestion: The subjective sensation or objective observation of an obstructed nasal airway.
• Mucus Characteristics:
  • Color:
    • Clear (Serous): Most common in viral infections and allergic rhinitis.
    • White: Frequently observed in the early stages of rhinitis.
    • Yellow/Green (Purulent): Highly suggestive of bacterial rhinitis.
    • Red-tinged (Blood): Indicative of epistaxis, often caused by infection or dry mucosa.
  • Amount: Categorized as scant or profuse; examiners note if it drains spontaneously from the nostril.
  • Consistency: Described as watery, stringy, or thick.
• Visible Congestion: Often results from swollen mucosa.
• Co-symptoms: Clinical assessments should include searches for cough, sore throat, or sinus-related headaches.

Mucosal and Sinus Pathophysiology

• Mucosal Presentation:
  • Normal: The mucosa should appear light pink.
  • Reddened: A common finding in rhinitis of any cause.
  • Bluish/Pale: A bluish hue (not true blue, but a distinct shift from pink) is pathognomonic for allergic rhinitis.
• Swollen Mucosa and Edema:
  • Mucosal Edema: Often accompanies rhinorrhea and involves the enlargement of the nasal conchae.
• Nasal Polyps:
  • These are non-cancerous growths of the nasal or sinus mucosa.
  • Visible as extra growths in addition to the conchae.
  • Characteristics: Soft, painless, and typically caused by chronic nasal or sinus conditions.
• Sinus Opacity: Caused by the accumulation of purulent mucus. While not present in every case, it is common in sinusitis.

Clinical Terminology and Definitions

• Pathognomonic: Refers to a sign or symptom that is highly specific and indicative of a particular condition.
• Purulent: Discharging or containing pus.
• Pus: Composed of dead immune cells. While various immune reactions can create it, it is most commonly associated with bacterial infections.
• Infection Complications:
  • Purulent Drainage: Indicates a direct infection of the lymph (bacteria have spread to a different location).
  • Non-purulent Drainage: The lymph is not infected but is inflamed; the bacteria have not yet spread.
• Serous: Descriptive of watery, clear fluid, often produced during an inflammatory process that lacks pus.

Sinus Referral Patterns and Facial Pain

• Maxillary Sinus: Pain often refers to the canine teeth and the maxillary teeth.
• Frontal Sinus: Pain refers to the frontal and parietal regions of the skull.
• Ethmoid Sinuses: Pain typically refers to the parietal and temporal regions.
• Sphenoid Sinus: Referral patterns include the vertex, occiput, post-auricular (mastoid) area, upper cervical region, and the shoulder.

Olfactory and Gustatory Dysfunction

• Interdependence: Taste and smell are interconnected; an impact on one often affects the other.
• Hyposmia and Anosmia:
  • Hyposmia: Decreased sense of smell.
  • Anosmia: Absent sense of smell.
  • Causes: Trauma to Cranial Nerve I ($CN\,I$), inflammation, or infection of the nasal mucosa (which can cause temporary or permanent damage).
  • Neurological Links: Olfactory loss can be a result of frontal lobe damage or trauma. It is often noted as an early symptom of Alzheimer’s disease.
• The Pocket Smell Test (PST):
  • A three-item screening measure used for odor identification.
  • Diagnostic Utility: Can discriminate between Alzheimer’s Disease ($AD$), Vascular Dementia ($VaD$), and Major Depression ($MD$).
  • Scoring: A score of $\ge 1$ (identifying $1$ or $0$ odors correctly) identifies $AD$ with a classification accuracy of $95\%$, sensitivity of $100\%$, and specificity of $92.5\%$.
• Hyperosmia: A heightened sense of smell or extreme sensitivity to odors/perfumes. Often leads to nausea, dizziness, or headaches. Causes include hereditary, hormonal, environmental, or metabolic factors (e.g., aldehydes).
• Parosmia: An abnormal sense of smell where certain smells are interpreted differently than before. Notable as a residual effect of COVID-19, which is hypothesized to involve neural inflammation or damage.

Epistaxis (Nosebleed)

• Epidemiology: $85\%$ of cases are idiopathic.
• Classification:
  • Mild Nosebleed: Accounts for $>90\%$ of cases. Usually originates in Kiesselbach’s Plexus.
  • Severe Nosebleed: Accounts for $<10\%$ of cases. Involves significant volume and blood pressure.
• Management:
  • Mild: Manual compression with the head leaning forward.
  • Severe (Emergency): Primary tamponade. The head should be tilted forward while squeezing firmly above the nostrils.
• Etiological Categories:
  1. Trauma: Digital trauma (nose picking), facial trauma, mucosal drying, foreign bodies, septal perforation, substance inhalation, or barotrauma.
  2. Infectious.
  3. Tumors/Lesions.
  4. Disorders of Hemostasis: Including changes in medication or bleeding disorders.
• Environmental Irritants: Broad category contributing to mucosal drying and irritation.
• Digital Trauma Terminology:
  • Rhinotillexis: Using a finger to extract nasal mucus.
  • Rhinotillexomania: Compulsive nose picking, categorized under DSM-5 Obsessive-Compulsive and Related Disorders. This carries a risk related to the "danger triangle" of the face.
  • Mucophagy: Consumption of mucus.
  • Mucophagomania: Extreme manifestation of mucus consumption related to hunger.

Rhinitis and Upper Respiratory Infections

• Rhinitis Characteristics: Inflamed nasal mucosa characterized by rhinorrhea, reddened and edematous membranes, and sneezing.
• Time-Based Categorization:
  • Acute: Less than $3$ months. Primary causes are infectious (usually viral) or allergic.
  • Chronic: Greater than $3$ months. Primary causes are allergic or fungal.
• Specific Types:
  • Allergic: Often accompanied by conjunctivitis and papilla. Can be Perennial (household dust, pets) or Seasonal (regional allergens).
  • Infectious: Viral (most common), Bacterial, Fungal, or Parasitic.
  • Chemical/Iatrogenic: Caused by strong single or multiple smaller exposures to irritants.
  • Rhinitis Medicamentosa: Rebound rhinitis caused by the prolonged use of OTC nasal decongestant sprays or certain essential oils.
• Community-Acquired Bacterial Pathogens: Common bacterial agents in URIs include Streptococcus pneumoniae, Haemophilus influenzae, and Staphylococcus aureus.
• Viral Rhinitis Progression:
  1. Viral Exposure.
  2. Cell Destruction and Mucociliary Transport Dysfunction (MTD).
  3. Acute Viral Rhinitis: Initial stage features reddened mucosa and an abnormally patent nose with scant, stringy mucus. Fully developed stages show edematous mucosa with rich, clear mucus.
  4. Resolution or Progression: Resolution occurs via sufficient immune response. Progression involves secondary pathogenic bacterial exposure leading to Acute Bacterial Rhinosinusitis ($ABRS$) or Chronic Rhinosinusitis.

Specialized Concepts in Nasal Health

• Mucociliary Transport (Escalator):
  • Extends from the nasopharyngeal region to the respiratory bronchioles.
  • Function: Traps and neutralizes inhaled contaminants, transporting them to the throat to be swallowed.
  • Structure: Consists of ciliated epithelial cells, an aqueous layer, and a gel layer. Cilia on the cell surface beat within the aqueous layer to move the mucus.
• Clinical Presentation of Infections:
  • Acute Viral Rhinitis: Symptoms include coryza (clear runny nose), stuffiness, sneezing, and low-grade fever. In children aged $18$ months to $4$ years, fevers may be higher. It lack a prodrome (fatigue, headache).
  • Other Viral Infections (Flu/COVID): Features a prodrome of malaise, fatigue, body aches, sore throat, cough, and fever ($>100^\circ F$).
  • Acute Bacterial Rhinosinusitis (ABRS): Presents with swollen, red nasal mucosa and thick, yellow (mucopurulent) discharge. Facial pain combined with mucopurulent discharge is highly specific for $ABRS$.
• Increased Vascularity Factors: Causes dryness and can be idiopathic or autonomic (e.g., Cluster headaches).
• Rhinoconjunctivitis Signs:
  • Symptoms: Coryza, sneezing, pruritus (itching), and watery eyes.
  • Allergic Shiner: A blue discoloration under the eye, common in chronic/non-acute cases.
  • Chemosis: Swelling of the tissue around the eye.
  • Allergic Salute: Habitual upward wiping of the nose, which can create a permanent crease in the nasal bridge and is usually accompanied by chronic sniffling.