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目的 分析双水平无创正压通气在抢救急性重度左心衰伴Ⅱ型呼吸衰竭中的应用效果.方法 将72例急性重度左心衰伴Ⅱ型呼吸衰竭病人随机分为实验组和对照组,每组34例.对照组于鼻部置入导管实施供氧处理,实验组采用呼吸机经鼻面罩双水平无创正压通气.统计分析两组研究对象治疗前后的呼吸频率(RR)、收缩压(SBP)、舒张压(DBP)、pH值、氧供值(DO2)、氧耗值(VO2)、动脉氧分压(PaO2)、Tei指数、左心室射血的评估分数(LVEF)、每次搏动输出量(SV)、血浆脑钠肽(BNP)、K+浓度、Na+浓度的变化情况.结果 治疗前,实验组与对照组患者的RR、SBP、DBP、pH值、DO2、VO2、PaO2、Tei指数、LVEF、SV、BNP、K+浓度、Na+浓度等指标比较差异无统计学意义(P＞0.05);治疗后,实验组患者上述指标的转归程度均明显好于对照组,差异有统计学意义(P＜0.05).结论 通过双水平无创正压通气对急性重度左心衰伴Ⅱ型呼吸衰竭的病人开展抢救治疗,既能改善病人的各项指标情况,又能显著提升预后质量.“,”Objective To analyze the effect of bi level noninvasive positive pressure ventilation in the treatment of acute severe left heart failure.Methods 72 cases of acute severe left heart failure with type Ⅱ respiratory failure in our hospital were randomly dividcd into experimental group and control group,with 34 cases in each group.The control group received nasal catheter oxygen treatment.Noninvasive positive pressure ventilation was used in the experimental group.The respiratory rate,systolic blood pressure,diastolic blood pressure,pH value,oxygen supply,oxygen consumption value,arterial oxygen partial pressure,Tei index,left ventricular ejection assessment scores (LVEF),each pulse output (SV),plasma brain natriuretic peptide (BNP) level,and changes of K+ and Na+ concentrations before and after treatment were analyzed.Results Before treatment,the respiratory frequency,systolic blood pressure,diastolic blood pressure,pH value,oxygen supply value,oxygen consumption value,arterial oxygen partial pressure,Tei index,LVEF,SV,BNP,and changes of K+ and Na+ concentrations of the experimental group and the control group had no significant differences (P＞0.05).After treatment,the above indexes in the experimental group were significantly better than those in the control group (P＜0.05).Conclusion The bi level noninvasive positive pressure ventilation treatment could improve the respiratory frequency,systolic blood pressure,diastolic blood pressure,pH value,oxygen supply value,oxygen consumption value,arterial oxygen partial pressure,Tei index,LVEF,SV,BNP,and changes of K+ and Na+ concentrations in patients with acute severe left heart failure with type Ⅱ respiratory failure,and also improve the prognosis of patients.