Abstract

Info

Title:: Design of selective segmental ventilation catheter for thoracic anesthesia

Author(s):: BAI Yunxiao1; CHEN Yao1; LI Haoming1; WAN Yantong1; YE Jing2; YANG Bin3; 1. School of Anesthesiology, Southern Medical University, Guangzhou 510515, China 2. Department of Anesthesiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China 3. Department of Anesthesiology, Chongqing University Cancer Hospital, Chongqing 400030, China

Keywords:: Keywords: thoracic surgery selective segmental ventilation airway management device one-lung ventilation

Abstract:: Objective To design a new type of airway management device for thoracic anesthesia to reduce the incidence of one-lung ventilation hypoxemia in thoracic surgery. Methods According to the adult airway anatomical data and the inner diameter of double-lumen endobronchial tube (DLT), the configuration and length of the selective segmental ventilation catheter was designed. Based on the airway resistance generated by the gas flow in the catheter of DLT, the minimum inner diameter that can be ventilated was calculated and verified by hydrodynamic principles. Results Under the condition of length determination, the selective segmental ventilation catheter is placed in the DLT, and the minimum radius for selective segmental ventilation is 0.243 mm in male, and 0.228 mm in female. According to the above calculation results, the selective segmental ventilation catheter with the minimum radius can be effectively insufflated. And it did work with flow rate of 0.5m/s under a fixed mean ventilation pressure of 20 cmH2O. Conclusion This new slim-diameter device with a safe ventilation flow rate and airway pressure in pulmonary segments is expected to alleviate hypoxemia during one-lung ventilation in patients.