[Application of high frequency jet ventilation system in laryngopharyngeal and tracheal surgery]

Objective:The effectiveness and safety of high frequency ventilation system in laryngopharyngeal and tracheal surgery is discussed. Methods:According to The American Society of Anesthesiologists Ⅰ-Ⅱ level, 60 cases of selective throat and tracheal surgery undering general anesthesia were randomly divided into high frequency jet ventilation group （group HFJV） and intermittent positive pressure ventilation group （IPPV group）, with 30 cases in each group. Group HFJV was treated with HFJV and group IPPV with a small caliber endotracheal tube connected to an anesthesia machine was treated with IPPV.Before anesthesia （T0）, after the success of the laryngoscope placed （T1）, 5 minites after ventilation （T2） and 5 minites after the laryngoscope removed （T3）, hemodynamic parameters were recorded at each time point , in T0, T2 and T3 record , arterial blood gas index, the patient's airway pressure, end-expiratory carbon dioxide concentration, surgical field quality and total blood loss, operating time and awakening time were recorded and compared between the two groups. Results:The average airway pressure and intraoperative average total blood loss of group HFJV were significantly lower than that of group IPPV（P<0.01）, and the average operative field quality of group HFJV was significantly better（P<0.01）, but there was no statistical significance in the effects on hemodynamics, arterial blood gas and other indicators compared with group IPPV（P>0.05）. No serious adverse events occurred in 2 groups. Conclusion:HFJV system can be used effectively in laryngopharyngeal and tracheal surgery, reducing intraoperative blood loss and improving surgical field of vision without obvious adverse reactions.