Nasal allergen provocation test: updated indications and diagnostic accuracy.

Area of Science:

• Allergy and Immunology
• Diagnostic Medicine

Background:

• Allergic rhinitis diagnosis often relies on skin prick tests (SPT) and serum-specific IgE (sIgE).
• Nasal allergen provocation testing (NAPT) offers a direct assessment of nasal reactivity.
• NAPT is valuable when conventional tests provide ambiguous results.

Purpose of the Study:

• To review current knowledge on the Nasal Allergen Provocation Test (NAPT).
• To assess NAPT's clinical applications, indications, and methodology.
• To compare NAPT with SPT and sIgE for diagnostic accuracy.

Main Methods:

• Review of existing literature on NAPT.
• Analysis of NAPT protocols, allergen types/doses, and outcome measures.
• Comparative analysis of NAPT, SPT, and sIgE diagnostic performance.

Main Results:

• NAPT is reinforced as the gold standard for confirming nasal allergic responses.
• Advancements include allergen standardization, combined objective/subjective measurements, and metered allergen application.
• Ongoing efforts aim to establish a universal NAPT protocol.

Conclusions:

• NAPT is a crucial diagnostic tool for allergic rhinitis.
• Standardization and refined methodologies enhance NAPT's reliability.
• Further research supports establishing a universal NAPT protocol for consistent clinical application.