Endotracheal Intubation Method Based on End-Tidal Carbon Dioxide Perception

Endotracheal intubation has broad application prospects in the biomedical field. At present, visual intubation tools are mainly used to judge the catheter position. However, when patients suffer from pains in the neck, throat, and trachea and other diseases or other conditions, if the exposure of the glottic area is not ideal, there are difficult airways. For difficult airways, this visual intubation tool has great limitations. Studying the new guidance method of endotracheal intubation and providing a reference or solution for difficult airway intubation is a crucial problem in the biomedical clinical field. In this paper, an endotracheal intubation method is proposed based on end-tidal carbon dioxide (ETCO2) perception. The simulation model verifies the feasibility of this method for endotracheal intubation guidance. Then, four micro-cavity tubes are used as a gas collection tube, and a set of endotracheal tube guidance systems based on ETCO2 perception is designed and developed to collect and process the CO2 concentration information in the pharyngeal cavity. The experimental results show that this guidance system can be used for intubation guidance in the simulated pharyngeal cavity without vision.