Accuracy and reliability of the sensory test performed using the laryngopharyngeal endoscopic esthesiometer and rangefinder in patients with suspected obstructive sleep apnoea hypopnoea: protocol for a prospective double-blinded, randomised, exploratory study

Luis Fernando Giraldo-Cadavid, Alirio Rodrigo Bastidas, Diana Marcela Padilla-Ortiz, Diana Carolina Concha-Galan, María Angelica Bazurto, Leslie Vargas, Luis Fernando Giraldo-Cadavid, Alirio Rodrigo Bastidas, Diana Marcela Padilla-Ortiz, Diana Carolina Concha-Galan, María Angelica Bazurto, Leslie Vargas

Abstract

Introduction: Patients with obstructive sleep apnoea hypopnoea syndrome (OSA) might have varying degrees of laryngopharyngeal mechanical hyposensitivity that might impair the brain's capacity to prevent airway collapse during sleep. However, this knowledge about sensory compromises in OSA comes from studies performed using methods with little evidence of their validity. Hence, the purpose of this study is to assess the reliability and accuracy of the measurement of laryngopharyngeal mechanosensitivity in patients with OSA using a recently developed laryngopharyngeal endoscopic esthesiometer and rangefinder (LPEER).

Methods and analysis: The study will be prospective and double blinded, with a randomised crossover assignment of raters performing the sensory tests. Subjects will be recruited from patients with suspected OSA referred for baseline polysomnography to a university hospital sleep laboratory. Intra-rater and inter-rater reliability will be evaluated using the Bland-Altman's limits of agreement plot, the intraclass correlation coefficient, and the Pearson or Spearman correlation coefficient, depending on the distribution of the variables. Diagnostic accuracy will be evaluated plotting ROC curves using standard baseline polysomnography as a reference. The sensory threshold values ​​for patients with mild, moderate and severe OSA will be determined and compared using ANOVA or the Kruskal-Wallis test, depending on the distribution of the variables. The LPEER could be a new tool for evaluating and monitoring laryngopharyngeal sensory impairment in patients with OSA. If it is shown to be valid, it could help to increase our understanding of the pathophysiological mechanisms of this condition and potentially help in finding new therapeutic interventions for OSA.

Ethics and dissemination: The protocol has been approved by the Institutional Review Board of Fundacion Neumologica Colombiana. The results will be disseminated through conference presentations and peer-reviewed publication.

Trial registration: This trial was registered at Clinical Trials Accuracy of the sensory test using the lLaryngopharyngeal endoscopic esthesiometer in obstructive sleep apnea. Protocol ID: 201611-22405. ClinicalTrials.gov ID: NCT03109171.

Keywords: adult thoracic medicine; bronchoscopy; laryngology; sleep medicine.

Conflict of interest statement

Competing interests: The laryngopharyngeal endoscopic esthesiometer and rangefinder (LPEER), which will be validated in this study, was granted a patent by the Superintendencia de Industria y Comercio de Colombia and a Patent Cooperation Treaty (PCT) by the World Intellectual Property Organization. The financial rights of the patent belong to University of La Sabana (one of this study’s funders). LFGC is one of the inventors of LPEER and could potentially receive future royalties from this patent. The study funders will not participate in the conduction of the study, statistical analysis, writing of the manuscript or decision to submit the report for publication.

© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

Figures

Figure 1
Figure 1
Flowchart of the study.

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