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Development of an extratracheal device for pulmonary function assessment in laryngectomized patients
Carlos Eduardo Molinari Nardi1, Mario Augusto Ferrari de Castro2, Daniel A Ribeiro3
1Department of Head and Neck Surgery, São Paulo Medical School, University of São Paulo, Avenida Conselheiro Nébias, 444, conjunto 1605, Encruzilhada, Santos, São Paulo, 11045-000, Brazil. nardi.cem@gmail.com.
Purpose:
Pulmonary function assessment in laryngectomized patients is challenging due to technical difficulties in performing spirometry. Existing methods have limitations, including potential air leakage and patient discomfort. The purpose of this study was to develop a simple, comfortable extratracheal device for accurate pulmonary function assessment in laryngectomized patients.
Methods:
We designed a silicone extratracheal device with a central connector for spirometer attachment and an adhesive layer for secure skin fixation. Ten laryngectomized patients underwent spirometry using the device. Forced Vital Capacity (FVC), Forced Expiratory Volume in one second (FEV1), and FEV1/FVC ratio were measured and compared to predicted values.
Results:
The extratracheal device was validated after performing successful spirometric tests in 10 laryngectomized patients, maintaining the necessary air seal to ensure the accuracy of the results, with no air leakage. Pulmonologists evaluating the device found it to be technically adequate for report generation.
Conclusion:
The developed extratracheal device has proven to be reliable and effective for assessing pulmonary function in laryngectomized patients, potentially serving as a valuable tool for regular pulmonary function monitoring in this population.
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