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Measurement of forces during laryngoscopy
M J Bucx1, P A Scheck, R T Van Geel
1Department of Anaesthesia, Erasmus University Rotterdam, The Netherlands.
Anaesthesia
|April 1, 1992
Summary
This study measured forces during laryngoscopy, finding average peak force was 35N. Understanding these forces is key to minimizing cardiovascular stimulation during intubation.
Area of Science:
- Anesthesiology
- Biomedical Engineering
- Cardiovascular Physiology
Background:
- Laryngoscopy is a critical step in airway management.
- Forces applied during laryngoscopy are suspected cardiovascular stimuli.
- Quantifying these forces is essential for patient safety.
Purpose of the Study:
- To investigate and quantify the forces applied during Macintosh laryngoscopy.
- To analyze force parameters including duration, peak force, mean force, and force-time integral.
- To correlate these forces with potential cardiovascular stimulation.
Main Methods:
- A modified laryngoscope was designed to measure forces.
- Force measurements were collected during uncomplicated intubations in 49 patients.
- Key parameters: duration, maximal force, mean force, and force-time integral were determined.
Main Results:
- Average laryngoscopy duration was 16.3 seconds.
- Average maximal applied force was 35N (SD 12).
- Average mean force was 20N (SD 6), with a force-time integral of 324N (SD 194).
Conclusions:
- This study provides objective measurements of forces during laryngoscopy.
- The quantified forces offer a basis for understanding and potentially mitigating cardiovascular responses.
- Further research can explore reducing these forces to enhance patient outcomes.