Abstract: Objective · To analyze the clinical application of bronchial blocker and tracheal catheter in infants with one-lung ventilation. Methods · Forty patients in Children′s Hospital, Shanghai Jiao Tong University Jul. 2017 to Jun. 2018 undergoing elective thoracoscopic surgery were randomized into two groupsrandom number method, i.e. group A (bronchial blocker）and group B (tracheal catheter), with twenty cases in each group. In the two groups, one-lung ventilation was achievedblocking bronchial blocker and tracheal catheter, respectively. All operations were performedone skilled anesthesiologist. The clinical occurrences of the two groups were recorded, including placement and positioning time, immediate hemodynamic indexes before and after intubation, the number of successful cases of one-lung ventilation, the number of intraoperative shifts cases and postoperative hoarseness cases. Also, the ventilation indexes of the two groups was recorded, including tidal volume (VT), peak airway pressure (Ppeak) and intraoperative lung collapse after five minutes of one-lung ventilation. Results · Compared with group B, placement and positioning time in group A was shorter (P0.022), the number of successful rates of one-lung ventilation in group A was bigger (P0.024), the number of intraoperative shifts cases in group A was less (P0.042), and intraoperative lung collapse after five minutes of one-lung ventilation in group A was better (P0.030). There were no significant differences in immediate hemodynamic indexes before and after intubation, VT and Ppeak after five minutes of one-lung ventilation, and the number of postoperative hoarseness cases. Conclusion · Extraluminal placement of bronchial blocker used in infants has an advantages in terms of the intubation time, the success rate, and the less complications compared with the tracheal tube, which can achieve more effective one-lung ventilation and better clinical application value.

Key words: bronchial blocker, tracheal catheter, infant, one-lung ventilation