Profiles of Odorant Specific Performance in Olfactory Testing

Area of Science:

• Otolaryngology
• Neuroscience
• Psychophysics

Background:

• Olfactory dysfunction (OD) has diverse causes, but distinct psychophysical profiles for each etiology are not well-documented.
• Understanding these profiles could offer insights into the underlying pathophysiology of OD.

Purpose of the Study:

• To investigate if different etiologies of olfactory dysfunction present unique psychophysical testing profiles.
• To compare olfactory identification and discrimination abilities between individuals with chronic rhinosinusitis (CRS) and healthy controls.

Main Methods:

• Adults with and without chronic rhinosinusitis with/without nasal polyps (CRSwNP/CRSsNP) and healthy controls underwent olfactory assessment.
• The Sniffin' Sticks test was used to evaluate odor identification and discrimination abilities.

Main Results:

• Normosmic individuals, with or without CRS, had lower accuracy identifying apple, pineapple, and turpentine.
• Hyposmic individuals with CRS showed higher accuracy identifying orange and rose compared to control hyposmics.
• All hyposmic groups struggled to identify apple.

Conclusions:

• Odorant-specific identification and discrimination patterns may indicate the etiology of olfactory dysfunction.
• Psychophysical testing complexity involves olfactory and trigeminal function, odorant strength, distractors, and odorant familiarity.