Olfactory acuity after total laryngectomy

Area of Science:

• Otolaryngology
• Neuroscience
• Surgical Research

Background:

• Laryngectomy, a surgical procedure for voice restoration, can potentially impact olfactory function.
• Understanding post-laryngectomy olfactory changes is crucial for patient quality of life.

Purpose of the Study:

• To prospectively evaluate olfactory acuity in patients following laryngectomy.
• To assess the impact of laryngectomy on nasal and olfactory mucosa.

Main Methods:

• Olfactory acuity was measured using the Jet Stream Olfactometer (JSO) and Alinamin test.
• Nasal and olfactory mucosa were examined via rigid endoscopy.
• Evaluations were conducted preoperatively and at 3, 6, and 12 months post-surgery in 29 patients.

Main Results:

• Olfactory detection and recognition thresholds temporarily increased at 3 months post-surgery.
• Significant differences were noted between preoperative and 3-month postoperative thresholds.
• No significant differences in olfactory thresholds were found at 6 or 12 months compared to preoperative values.
• Atrophic nasal respiratory mucosa was observed in 11/14 patients at 12 months, while olfactory mucosa remained normal.

Conclusions:

• Olfactory epithelium function appears to remain intact after laryngectomy.
• Temporary olfactory impairment may occur, but recovery is likely within 6-12 months.
• Nasal mucosal changes post-laryngectomy do not necessarily affect olfactory function.