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Analysis of pressure applied during microlaryngoscopy
Rui Fang1, Hao Chen, Jingwu Sun
1Department of Otorhinolaryngology, Head and Neck Surgery, Shanghai EENT Hospital of Fudan University, Shanghai, China.
Summary
This study measured pressure during microlaryngoscopy, finding high forces in difficult exposures. Postoperative throat pain correlated significantly with procedure duration, not applied pressure.
Area of Science:
- Otolaryngology
- Surgical Mechanics
Background:
- Direct laryngoscopy is a common laryngological procedure.
- The fulcrum-based laryngoscope is the most frequently used instrument.
Purpose of the Study:
- To quantify pressure on the laryngopharynx and tongue base during microlaryngoscopy.
- To investigate the link between intraoperative pressure/time and postoperative throat pain.
Main Methods:
- Prospective study of 50 patients undergoing microlaryngeal surgery.
- Calculation of pressure using static equilibrium and lever principles.
- Correlation analysis between applied pressure/duration and postoperative pain.
Main Results:
- Mean pressure was 292 ± 109 mmHg, influenced by BMI, neck circumference, and mouth opening.
- Significantly higher pressure (376 ± 62 mmHg) observed in difficult laryngeal exposures.
- Procedure duration, not pressure, showed the strongest correlation with postoperative throat pain.
Conclusions:
- High pressures during microlaryngoscopy may contribute to postoperative pain and complications.
- Suspension laryngoscopy duration is a more critical factor for predicting throat pain than applied pressure.
