Abstract: Objective To explore the application of the knowledge-belief-practice model on atomization inhalation therapy in the patients with severe bronchiectasis complicated with pulmonary infection and the effect on self-managment ability. Methods From 2017 to 2019, ninety-four patients with severe bronchiectasis and pulmonary infection were selected and divided into control group and observation group, with 47 cases in each group. Both groups were treated with aerosol inhalation of acetylcysteine solution. The control group was given routine nursing intervention, and the observation group was given the knowledge-belief-practice mode intervention on the basis of the control group. Lung function, arterial blood gas index, and self-management ability were compared between the two groups before and after intervention. Results After the intervention, the vital capacity, expiratory flow rate, and expiratory volume in the observation group were higher than those in the control group (P<0.05). The pH, arterial oxygen pressure (PaO₂), and arterial oxygen saturation (SaO₂) in the observation group were higher than those in the control group(P<0.05), and the arterial blood carbon dioxide partial pressure (PaCO₂) was lower than that in the control group(P<0.05). The self-dietary management, drug management, emotional management, health knowledge level and self-care ability score in the observation group were higher than those in the control group(P<0.05). Conclusions The use of the knowledge-belief-practice model is beneficial in the treatment of the patients with severe bronchiectasis and pulmonary infection. It can effectively improve the patients' pulmonary function index, the arterial blood gas index, and the patient's self-management ability, which is worth popularizing and applying.

Key words: knowledge-belief-practice model, severe bronchiectasis, pulmonary infection, self-management ability, aged