Abstract: ObjectiveTo explore the application of venturi devices combined with heating humidifiers in type Ⅱ respiratory failure patients after tracheotomy. MethodsA total of 32 respiratory failure patients were enrolled after tracheotomy and randomly divided into an observation group and a control group (n=16). The observation group used venturi devices combined with heating humidifiers, where sterile water was used as the wetting fluid. Meanwhile, a conventional oxygen humidifying method was applied in control group, where 0.45% normal saline was used as the wetting fluid. Then, the two groups were compared for the average temperature of inhaled gas, partial pressure of oxygen (PaO2) and partial pressure of carbon dioxide (PaCO2). ResultsCompared with the control group, the observation group produced remarkable improvement in humidifying in the airway, the average temperature of inhaled gas, as well as PaO2 and PaCO2 (P<0.05 or P<0.01). ConclusionsThe combined use of venturi devices and heating humidifiers is more suitable in treatment of type Ⅱ respiratory failure patients after tracheotomy, which can reduce CO2 retention, avoid airway complications, and increase patient satisfaction.