{'fraction_non_alphanumeric': 0.017651052274270197, 'fraction_numerical': 0.0013577732518669382, 'mean_word_length': 5.855813953488372, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
MRI Study of Snoring-related Measurement Indexes in the Upper Airway of Normal Adult

Objective To establish a normal reference value of snoring-related measurement indexes in normal adult upper airway for providing the basis for the located and etiological diagnosis of snoring. Methods The upper airway of 38 cases of non-snoring subjects were performed by MRI. The length of soft palate, distance of velopharyngeal, distance of glossopharyngeal, thickness of the body of tongue, glossopharyngeal angle and epiglottis-pharyngeal angle were measured, and the palatopharyngeal index and glossopharyngeal index were calculated. Simultaneously, the cross-sectional area of nasopharynx, oropharynx and hypopharynx were measured in their expansion phase and collapse phase respectively. Results The palatopharyngeal index and glossopharyngeal index reflected the change of palatopharyngeal cavity and glossopharyngeal cavity in the sagittal distance. The palatopharyngeal index and glossopharyngeal index were increased, then the pharyngeal space were narrowed. The nasopharynx hadn’t a visible mobility during respiration, while the cross-sectional area of oropharynx and hypopharynx could be changed with varying respiratory conditions. Conclusion It could be more truly reflect the changing of the anatomic morphology and functional status in upper airway when the static snoring-related distance measurement indexes and dynamic change of cross-sectional area were combined.