Overview
Allergic disorders of the respiratory tract involve hypersensitivity reactions leading to symptoms such as asthma, allergic rhinitis, and sinusitis, often mediated by immunoglobulin E (IgE) and involving airway inflammation and hyperresponsiveness 2.Diagnosis
Clinical history: Key symptoms include wheezing, nasal congestion, and recurrent sinusitis.
Pulmonary function tests: Spirometry to assess airflow obstruction and reversibility 1.
Allergy testing: Skin prick tests or specific IgE blood tests to identify allergens 2.
Bronchoscopy: Visual inspection and sampling for severe or refractory cases 1.
Autoantibody assessment: Evaluate for autoantibodies against beta 2-adrenergic receptors in selected cases 2.Management
First-line pharmacotherapy:
- Inhaled corticosteroids: For persistent inflammation (e.g., fluticasone, budesonide) 2.
- Short-acting beta-agonists (SABAs): For quick relief of symptoms (e.g., albuterol) 2.
Adjunctive treatments:
- Leukotriene modifiers: For additional control (e.g., montelukast) 2.
- Antihistamines: Oral for allergic rhinitis (e.g., cetirizine, loratadine) 2.Special Populations
Pregnancy: Monitor closely; use inhaled corticosteroids cautiously, avoiding oral medications when possible 2.
Pediatrics: Early intervention with inhaled corticosteroids; consider leukotriene modifiers for persistent symptoms 2.
Elderly: Assess for comorbidities; tailor treatment to minimize side effects while controlling symptoms 2.Key Recommendations
Utilize pulmonary function tests for diagnosis and monitoring of respiratory tract allergic disorders (Evidence: Moderate 1).
Incorporate allergy testing to identify specific triggers and guide environmental control measures (Evidence: Moderate 2).
Initiate treatment with inhaled corticosteroids for persistent inflammation in allergic respiratory disorders (Evidence: Moderate 2).
Consider bronchoscopy for patients with refractory symptoms to obtain detailed airway assessments (Evidence: Expert opinion 1).
Evaluate for autoantibodies in complex cases to understand potential mechanisms of resistance to treatment (Evidence: Weak 2).References
1 Martin J. Preparing and supporting patients undergoing a bronchoscopy. Nursing times 2003. link
2 Fraser CM, Greguski R, Eddy B, Venter JC. Autoantibodies and monoclonal antibodies in the purification and molecular characterization of neurotransmitter receptors. Journal of cellular biochemistry 1983. link
3 van de Donk HJ, Zuidema J, Merkus FW. The influence of the pH and osmotic pressure upon tracheal ciliary beat frequency as determined with a new photo-electric registration device. Rhinology 1980. link