Related Experiment Video
Updated: Oct 4, 2026
CO2-Lasertonsillotomy Under Local Anesthesia in Adults
Published on: November 6, 2019
Experimental CO2 laser myringotomy
H J Valtonen1, D S Poe, S M Shapshay
1Department of Otorhinolaryngology, Central Hospital of Central Finland, Kuopio. hannu.valtonen@kuh.fi
Objective:
The purpose of this study was to compare closure rates of CO2 laser myringotomies with those produced conventionally with a knife.
Study Design And Setting:
We investigated closure rates in 3 experimental groups of chinchillas: (1) semicircular myringotomy in both ears either produced with a knife or CO2 laser; (2) CO2 laser myringotomy, round in one ear and kidney shaped in the other; (3) CO2 laser myringotomy, incisional in one ear and kidney shaped in the other.
Results:
Patency of knife myringotomies was shorter (P < 0.01) than of similar laser myringotomies, means 10.0 and 21.8 days, respectively. The patency of kidney-shaped laser myringotomies was longer (P < 0.05) than of round ones. Incisional laser myringotomies remained open longer (P < 0.01) than round ones.
Conclusion:
Use of CO2 laser as well as certain geometries delay the closure of myringotomies. By allowing perforations of different shapes and sizes, CO2 laser myringotomy may become an alternative in the treatment of otitis media.
Insights
CO2 laser myringotomies show delayed closure compared to traditional knife incisions. Specific laser geometries, like kidney-shaped, further extend patency, offering potential in otitis media treatment.
Area of Science:
- Otolaryngology
- Laser Surgery
- Surgical Techniques
Background:
- Myringotomy is a common procedure for middle ear conditions.
- Traditional knife myringotomy closure rates are well-established.
- Investigating novel techniques like CO2 laser myringotomy is crucial for improving outcomes.
Purpose of the Study:
- To compare the closure rates of CO2 laser myringotomies with conventional knife myringotomies.
- To evaluate the effect of different CO2 laser myringotomy shapes on closure time.
Main Methods:
- Chinchilla model utilized for three experimental groups.
- Comparison of semicircular myringotomies created by knife versus CO2 laser.
- Assessment of round, kidney-shaped, and incisional CO2 laser myringotomies.
Main Results:
- Knife myringotomies had significantly shorter patency (10.0 days) than laser myringotomies (21.8 days).
- Kidney-shaped laser myringotomies exhibited longer patency than round ones (P < 0.05).
- Incisional laser myringotomies remained open longer than round ones (P < 0.01).
Conclusions:
- CO2 laser use and specific geometries significantly delay myringotomy closure.
- CO2 laser myringotomy offers flexibility in perforation shape and size.
- This technique presents a potential alternative for treating otitis media.
