- The mean of P / F ratio after finishing Jet ventilation and apneic ventilation (T4) was statistically significantly higher in JV group than AIV group (p < 0.001) - The mean of SaO2 in JV group (93 - 100%) was statistically significantly higher than in AIV group (69.2 - 100%) during tracheal resection (T3, T3') (p<0.05).