Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (4): 562-566.doi: 10.3969/j.issn.2095-4344.1037

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Anatomical differences in three-dimensional finite element model of difficult airway patients

Xie Yuchen, Chen Wendong, Ma Li   

  1. Department of Anesthesiology, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
  • Online:2019-02-08 Published:2019-02-08
  • Contact: Chen Wendong, Attending physician, Department of Anesthesiology, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
  • About author:Xie Yuchen, Master candidate, Department of Anesthesiology, First Affiliated Hospital of Kunming Medical University, Kunming 650032, Yunnan Province, China
  • Supported by:

    the Research Project of Yunnan Provincial Science and Technology Department, No. 2014NS083 (to CWD); the Applied Basic Research Project of Yunnan Province (Combined Project of Kunming Medical University), No. 2017FE468(-147) (to CWD)

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Abstract:

BACKGROUND: Three-dimensional models are more and more applied in medical fields with technology development. Airway management is a key for anesthesia; however, litter is reported on the three-dimensional finite element models of normal human airways.

OBJECTIVE: To reconstruct the three-dimensional finite element model of human airway based on MRI data, and to analyze the anatomical differences in difficult airway three-dimensional model.
METHODS: Twenty patients with normal airways and 20 patients with difficult airways were enrolled, and then the MRI two-dimensional imaging data of head and neck were obtained. A three-dimensional solid digital model including the entire mandible, hyoid bone and upper airway was reconstructed using Mimics 10.01. Measurement software was used to measure related indicators. At the same time, normal human body surface markers were measured to obtain relevant data to compare with the measured indexes of the model, and the differences in normal and difficult airway anatomy were analyzed.
RESULTS AND CONCLUION: (1) The measured value of mandibular distance in the three-dimensional model group was significantly smaller than that in the body surface measurement group in normal airway patients (P < 0.01). The measured value of mandibular distance in the three-dimensional model group was higher than that in the body surface measurement group in patients with difficult airway (P > 0.05). The measured value of mandibular angle in the three-dimensional model group was higher than that in the body surface measurement group of normal airway patients (P > 0.05). (2) In supine and sniffing positions, the oropharyngeal angle and minimal sagittal cross-sectional area in the normal airway group were significantly higher than those in the difficult airway group (P < 0.05). There was no significant difference in the minimal coronal cross-sectional area between two groups (P > 0.05). (3) These results suggest that the human airway data obtained by MRI can establish a realistic and reliable three-dimensional finite element model, and the model can accurately analyze the anatomical differences with difficult airways, which provides reference for predicting difficult airways in clinical practice. 

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

Key words: Anesthesia, Airway Management, Magnetic Resonance Imaging, Finite Element Analysis, Tissue Engineering

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