Application Of Difficult Airway Assessment Used Three-Dimensional Finite Element Model Of Upper Airway Filled

Objective:The three-dimensional finite element model of the upper airway was reconstructed by the two-dimensional images of the patients with normal airway and difficult airway.The patients were treated with horizontal position and maximal supine airway Morphological changes,analysis of the specificity of airway anatomy in difficult airway.Methods:Selected from April to December 2015 Kunming Medical University First Affiliated Hospital after surgery anesthesia has been identified as normal airway patients and difficult airway patients 20,And has been reconstructed by the task group and validated the effective three-dimensional finite element model data into the Mimics10.0 software using the filling method to fill the normal and difficult airway patients with the upper airway three-dimensional finite element model,and marked the exact location of the airway ?Door teeth point O ?posterior pharyngeal wall highest Point A?glottidis rimae midpoint N/D and accurate measurement of the Door teeth point,the highest point of the posterior pharyngeal wall,glottidis rimae midpoint composed of Oropharynx angle ?OAN,?OAN',?OAD,?OAD 'and other related anatomical indicators(S1,S1',S2,S2',S3,S3 ',S4,S4')in the tracheal intubation.And calculate and analyze the normal and difficult airway patients supine to the maximum supine position of the anatomical changes in the law,resulting in difficult airway patients with anatomical specificity.Results:1?Normal airway and difficult airway oropharyngeal corneal maximum supine position were more than supine position;normal airway oropharyngeal angle different position(supine position,supine position)can be more difficult range of airway mouthway different position(supine position,Supine position)large.There were significant differences in the oropharyngeal angle between the normal airway group and the difficult airway group(P<0.05).The oropharyngeal angle could be used as an effective index for difficult airway prediction.2.Tracheal intubation when the patient from supine to supine position,sagittal on the airway in the smallest cross-sectional area is increasing,and the normal airway more difficult airway changes;coronal incision on the airway minimum cross-sectional area no statistics(P>0.05).There was no significant difference in the maximum cross-sectional area of the airway between the normal corneal and the difficult airway(P>0.05).There was no significant difference in the maximal cross-sectional area between the normal airway and the difficult airway.There were significant differences in the the minimum cross-sectional area of sagittal suture between the normal airway group and the difficult airway group(P<0.05).The minimum cross-sectional area of sagittal suture could be used as an effective index for difficult airway prediction.Conclusions:Application of the three-dimensional finite element model of airway filling reconstruction can effectively evaluate the difficult airway from the anatomical direction.There was a significant difference in the oropharyngeal angle between the normal airway group and the difficult airway group(P<0.05),indicating that the oropharyngeal angle composed of the highest point of the posterior pharyngeal wall and the midpoint of the pharyngeal wall and the midpoint of the glottis can be used as difficult airway prediction Effective indicators.(P<0.05).The minimum cross-sectional area of sagittal anterior airway can be used as an effective index for difficult airway prediction.The maximal cross-sectional area of sagittal airway between normal airway group and difficult airway group was significantly different(P<0.05).