Volumetric Changes after Coblation Ablation Tongue (CAT) in Obstructive Sleep Apnea Patients

Area of Science:

• Otolaryngology
• Sleep Medicine
• Surgical Innovation

Background:

• Tongue obstruction is a common issue in patients with obstructive sleep apnea (OSA).
• Coblation ablation tongue (CAT) is a novel whole-tongue treatment approach.
• Understanding the relationship between tongue dimensions and OSA severity is crucial.

Purpose of the Study:

• To investigate the association between tongue dimensions and OSA severity.
• To evaluate volumetric changes in the tongue following CAT treatment.
• To identify factors influencing the outcome of tongue volume reduction.

Main Methods:

• A prospective study involving 12 male OSA patients (average age 35, AHI 45.5).
• Patients underwent multi-level sleep surgery including CAT, utilizing a coblation wand for tongue ablation.
• Tongue dimensions and volume were measured using CT scans pre- and post-surgery (3 months).

Main Results:

• Baseline tongue length showed a significant correlation with OSA severity (r=0.60, p=0.02).
• Multi-level surgery significantly improved AHI (43.8 to 23.7, p=0.008).
• CAT significantly reduced tongue volume (91.3 to 85.6 cm³, p=0.02), averaging 5.7 cm³ reduction per patient (0.38 cm³ per ablation).
• Surgical success was higher in patients with non-hypertrophic lingual tonsils (Grade I/II) compared to hypertrophic ones (Grade III/IV).

Conclusions:

• Tongue length is a significant factor associated with OSA severity.
• CAT effectively reduces tongue volume in OSA patients.
• A volumetric reduction of 0.38 cm³ per ablation may optimize tongue reduction for OSA treatment.
• CAT enhances retroglossal airway volume, particularly in patients without hypertrophic lingual tonsils.