Results of clinical olfactometric studies

Area of Science:

• Otorhinolaryngology
• Neuroscience
• Sensory Physiology

Background:

• Olfactory function assessment is crucial for diagnosing various conditions.
• Existing methods for measuring olfactory thresholds can be limited by adaptation effects.
• Understanding olfactory perception disorders requires precise measurement tools.

Purpose of the Study:

• To present a modified flow olfactometer designed to minimize adaptation.
• To investigate olfactory thresholds in diverse populations including post-surgical patients, smokers, and students.
• To analyze age-related changes and differences in olfactory perception between healthy individuals and those with hyposmia.

Main Methods:

• Utilized a modified flow olfactometer with a new apparatus for "quasi-free" nasal respiration.
• Examined olfactory thresholds before and after septum operations and in patients with cheilognathopalatoschisis.
• Studied olfactory thresholds and "fatique-time" in smokers and assessed diurnal variations in students.
• Compared perceptive and recognition thresholds in normal individuals and patients with hyposmia.

Main Results:

• The modified olfactometer effectively eliminates adaptation without requiring a special testing room.
• Significant increases in olfactory thresholds were observed post-septum surgery and in cheilognathopalatoschisis cases.
• Smokers showed a threefold increase in olfactory threshold and reduced "fatique-time".
• Olfactory thresholds exhibited a continuous increase with age, contrary to some literature.
• A significant difference in perceptive and recognition thresholds was found between normal individuals and those with hyposmia.

Conclusions:

• The novel flow olfactometer is a valuable tool for accurate olfactory threshold measurement.
• Olfactory function is significantly impacted by surgical interventions, smoking, and aging.
• The study underscores the variability in olfactory perception disorders and the importance of the sense of smell.