The Weaning Protocol of High Flow Nasal Cannula Reduce Duration of Weaning in Lower-Respiratory Tract Infection in Children Who Used High Flow Nasal Cannula: Single Center Experience in Thailand

Background: Use of high flow nasal cannula (HFNC) has been widely accepted as non-invasive respiratory support in children suffering from lower respiratory tract infections (LRI). Patients who use HFNC still need respiratory care from health personnel in ICU or intermediate care wards. Without the weaning protocol, the authors had noticed prolonged HFNC use, which affected the length of hospital stay (LOS). As such, a pediatric patient care team (PCT) created the weaning protocol and collected data whether the weaning protocol would shorten weaning time. Objective: To compare HFNC weaning times among children suffering from LRI, before and after using the weaning protocol. Materials and Methods: A pre- and post-intervention study of 1-month-old to 5-year-old children who received HFNC therapy for LRI at Panyananthaphikkhu Chonprathan Medical Center between August 2018 and July 2020, the one year before and after the protocol was implemented in August 2019, were carried out. Demographic data and severity of respiratory illness according to Respiratory Assessment Score (RAS) were recorded. Multivariate linear regression, adjusted for age, gender, weight, RR, HR, SpO₂, and RAS before using HFNC, was used to compare between the pre- and post-weaning protocol groups according to total HFNC time, duration of weaning time, and LOS. Results: There were 25 patients in each group. The mean age in the post-weaning protocol group was lower, but there was no difference in severity. Multivariate linear regression demonstrated that the post-weaning protocol group had a significantly shorter weaning time at 49.5±37.0 hours versus 84.2±62.8 hours (p=0.034). Moreover, total HFNC time was also significantly shorter in the post-weaning protocol group at 71.53±36.7 hours versus 119.6±78.2 hours (p=0.019). There was no difference in vital signs during weaning between the two groups. Conclusion: Implementing the weaning protocol reduce weaning time and total HFNC time, without affecting clinical outcomes. Keywords: High flow nasal cannula; Weaning protocol; Lower respiratory tract infection; Length of stay