Abstract: This paper discussed the imaging evaluation of elderly pulmonary infection and the efficacy of high-flow humidification oxygen therapy. 96 patients with lung infection were selected as study subjects and divided into conventional oxygen therapy and high-flow humidification oxygen therapy with 48 cases in each group. The levels of inflammation-related factors and blood gas indexes in the two groups were tested, and the pulmonary CT imaging and clinical efficacy of the two groups were compared. After treatment, the levels of leukocyte count, neutrophil percentage, PCT, CRP, IL-1, IL-6, IL-8, TNF-α and PaCO₂ decreased, and the high-flow humidified oxygen therapy group was lower than the conventional oxygen therapy group. After treating the SaO₂ and PaO₂ increased and higher than the high-flow humidified oxygen therapy group (P<0.05). The proportion of pleural effusion, nodules, grid, line pattern, and ground glass in the high-flow humidification oxygen therapy group after treatment was lower than the conventional oxygen therapy group (P<0.05). The high flow humidified oxygen effective rate was higher than the conventional oxygen treatment group (P<0.05). To sum up, high flow humidification oxygen therapy has good treatment effect on elderly patients with pulmonary infection, and pulmonary CT imaging can provide some reference for early diagnosis and efficacy evaluation of patients with lung infection, and has certain clinical promotion value.

Key words: lung infections in the elderly, high flow humidified oxygen therapy, lung CT, inflammatory factors