Objectives: Our aim was to determine the treatable causes to increase the chance of decannulation success. For this purpose we evaluated the differences between the patients who succesfully decannulated and the patients who still has tracheostomy. Metods: A retrospective cohort study was conducted based on medical records of all pediatric patients with tracheostomy in a single centre. Results: Decannulation was successfully achieved in 59 patients (34.5%) of total 171 patients with tracheostomy between the years 2012-2019. Median duration of tracheostomy was 41.5 and 12 months in patients who remained with tracheostomy and decannulated respectively. Neurological disorders were higher in patients remained with tracheostomy, congenital heart disease and airway abnormalities were higher in decannulated patients. Presence of bacterial colonization (3.8-fold), history of invasive respiratory support following tracheostomy (2.9-fold), and having any neurological disorder and/or comorbidity (5.2-fold) were significantly associated lower rates of decannulation. Almost 33 % of patients had bacterial colonization and colonization rates were higher in patients who needed invasive respiratory support following tracheostomy placement (p<0.001), patients with feeding/swallowing problems (p=0.005) and neurological disorders(0.002). There was significant correlation between duration of tracheostomy and bacterial colonization rates (p=0.008). But after analysing with logistic regression only having a neurological disorder was associated with bacterial colonization (OR= 2.9; 95% Cl: 1.15-7.47 p=0.024). Conclusion: While conducting decanulation assessment, the presence of colonization should be considered. Future prospective researchs are necessary in order to determine the role of chronic colonization on decannulation success.

Introduction Children with tracheostomy have an increased risk of bacterial colonization and infections of the lower respiratory tracts. This study aimed to investigate the effects of nebulized antibiotics on the bacterial load, the need for oral antibiotic courses, the number of hospitalizations, and the length of stay in the intensive care unit in children with tracheostomy. Methods Children with tracheostomy and persistent bacterial colonization who were started on nebulized antibiotic therapy after a lower respiratory tract infection were included to the study. Nebulized gentamicin or colistin were used according to the results of tracheal aspirate cultures. Demographic and clinic characteristics were recorded from one year before until 12 months after initiating nebulized antibiotic treatment. Results Nebulized antibiotic treatment was initiated in 22 patients. Inhaled gentamicin was administered to 14 patients (63.6%) and colistin to 8 patients (36.4%). The median duration of treatment was 3 months (2-5 months). Following nebulized antibiotic treatment, median number of hospitalizations decreased from 2 (1-3.5) to 1 (0-1.5) (p=0.04). The median length of stay in the intensive care unit reduced significantly from 89.5 days (43-82.5) to 25 days (7.75-62.75) after starting nebulized antibiotics (p = 0.028). Following nebulized antibiotic treatment colony count also decreased (105 CFU/ml (105-106) vs. 6x104 CFU/ml (104-105); p=0.003). Conclusions Nebulize antibiotics are a reasonable treatment option for lower respiratory tract infections for tracheotomized children with persistent colonization. Further studies are needed to determine the main indications and the optimal duration and doses of the long-term nebulized antibiotic treatment in these patients.