Application Effect Analysis of Three Methods of Heating and Humidification for Weaning Patients in ICU

Abstract Objectives Adequate humidity and temperature of the inhaled mixed air are important for patients weaning from ventilators. It can not only prevent the damage of dry gas on respiratory tract, but also facilitate the discharge of sputum. We aim to investigate the humidification and heating effects of artificial nose, Venturi device plus thermostatic humidification T-tube (referred as VT), Venturi device plus thermostatic humidification T-tube and PEEP valve (referred as VTP) in critical ill patients with tracheotomy in ICU.Design:Retrospective cohort study.Setting: Tertiary academic medical center.Patients: A total of 166 patients were engaged in this study. Clinical and laboratory examination data were used to determine the heating and humidification performance of 3 different methods.Methods A retrospective, single-center cohort study was conducted in all critically ill patients ready to be weaned from mechanical ventilators. Three groups of patients were compared in terms of vital signs, the effect of artificial airway heating and humidification, and blood gas indicators. Basic patient data (age, gender, mechanical ventilation duration, ICU stay, disease type) were recorded. Vital signs include heart rate, blood pressure, respiratory rate, oxygen saturation; The performance of heating and humidifying the artificial airway were defined as the number of sputum suction and coughing within 24 hours, sputum characteristics, whether there is bloody sputum formation, whether there is phlegm callus formation; Blood gas indicators include pH, oxygen partial pressure, carbon dioxide partial pressure, lactic acid, residual base, and bicarbonate.Results In terms of the heating and humidification performance of patients in ICU, the VT method and the VTP method were significantly superior to those of artificial nasal method.SpO2 was significantly higher in patients treated with the VTP method than that in patients treated with VT.ConclusionCompared with the artificial nose method, the VTP method and VT methods are better. In terms of improving oxygenation, the VTP method could improve the patient's oxygen sum more than the VT mothod.