To investigate the role of oxygen-inhalation and sputum-suction devices in the treatment of patients with severe pulmonary infection under evidence-based intervention.

From January 2022 to January 2024, 80 patients with severe pulmonary infection in Heze Municipal Hospital were observed. According to the different treatment devices used, 80 patients were divided into conventional group and study group, with 40 patients in each group. Patients in the conventional group received conventional oxygen inhalation and sputum suction methods; patients in the study group used an integrated oxygen and sputum suction device and operated under the guidance of evidence-based intervention, including the formulation of evidence-based questions, evidence retrieval and quality evaluation, transformation and implementation of evidence-based plans, dynamic monitoring and continuous improvement. Symptom resolution, blood gas index, clinical pulmonary infection score (CPIS), total number of sputum aspiration and sputum purification time were compared between the two groups after treatment.

The duration of cough cessation, the disappearance time of wheezing and stridor in the research group were shorter than those in the conventional group, and the difference was statistically significant (P < 0.05). Before treatment, there was no statistically significant difference in arterial blood oxygen partial pressure and oxygen saturation between the conventional group and the research group (P > 0.05); after treatment, the arterial blood oxygen partial pressure and oxygen saturation of both groups increased, and those in the research group were higher, with a statistically significant difference (P < 0.05). Before treatment, there was no statistically significant difference in CPIS scores between the conventional group and the research group (P > 0.05); after treatment, the CPIS scores of both groups decreased, and those in the research group were lower, with a statistically significant difference (P < 0.05). The total number of sputum aspiration and sputum purification time in the research group were less than those in the conventional group, with a statistically significant difference (P < 0.05).

With evidence-based intervention, the use of integrated oxygen and sputum suction device can effectively relieve the symptoms of cough, wheezing and stridor in patients with severe pulmonary infection, improve the partial pressure of arterial blood oxygen and blood oxygen saturation, and help to improve the respiratory function and oxygenation of patients.