A Study of the Clinical Benefit of Tobramycin Inhalation Solution

Inclusion Criteria: * Bronchiectasis 1. Patients with a past medical history or a diagnosis of bronchiectasis in the current case; 2. Patients seen or admitted to the hospital from 1 January 2021 to 31 December 2023 (including outpatient, emergency, and inpatient); 3. Case record of at least 1 course of treatment (continuous administration for 28 days) with tobramycin inhalation solution or other antibiotic nebulisation; 4. Patients with a positive copper-green test at the first visit. * Cystic fibrosis 1. Patients with a past medical history or a diagnosis of cystic fibrosis in the current case; 2. Patients who were seen or admitted to the hospital from 1 January 2021 to 31 December 2023 (including outpatient, emergency, and inpatient); 3. Case record of at least 1 course of treatment (continuous administration for 28 days) with tobramycin inhalation solution or other antibiotic nebulisation; 4. Patients with a positive copper-green test at the first visit. * Multidrug-resistant bacterial lung infections 1. Patients with a diagnosis of pulmonary infection; 2. Patients admitted to the hospital from 1 January 2021 to 31 December 2023 (only inpatients were included); 3. Case records with completion of at least 3 days of treatment with tobramycin inhalation solution or other antibiotic nebulisation; 4. The patient tested positive for pathogens at least once during the period of medication. Exclusion Criteria: * Bronchiectasis Patients with key information missing from the study, such as therapeutic agents, diagnostic information for bronchiectasis, etc. * Cystic fibrosis Patients with cystic fibrosis, for which key information is missing, such as treatment medication, diagnosis of cystic fibrosis. * Multidrug-resistant bacterial lung infections Patients hospitalized with severe pneumonia were missing key study information, such as laboratory tests not performed.