The upper and lower airways: the epidemiological and pathophysiological connection

Area of Science:

• Respiratory Medicine
• Otolaryngology
• Allergology

Background:

• The upper and lower airways are not distinct anatomical or functional entities.
• Significant relationships exist between nasal conditions and asthma.
• Allergic rhinitis and rhinosinusitis can influence bronchial asthma.

Purpose of the Study:

• To elucidate the interconnectedness of upper and lower airway diseases.
• To highlight the impact of rhinitis and rhinosinusitis on asthma control.
• To emphasize the need for integrated patient observation.

Main Methods:

• Review of existing literature on airway interactions.
• Analysis of clinical observations linking upper airway inflammation to lower airway symptoms.
• Correlation of allergic rhinitis and rhinosinusitis prevalence with asthma diagnosis.

Main Results:

• Evidence supports a continuum between upper and lower airway pathologies.
• Allergic rhinitis and rhinosinusitis are identified as significant contributing factors to asthma.
• A bidirectional relationship between these conditions is suggested.

Conclusions:

• Integrated management of upper and lower airway diseases is crucial.
• Patients with rhinitis should be monitored for asthma development.
• Asthma patients should be evaluated for underlying rhinitis or rhinosinusitis.