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Paediatric headbox as aerosol and droplet barrier #MMPMID34266877
Sahih M; Schultz A; Wilson A; Alakeson R; Taylor E; Mullins B; Martin AC
Arch Dis Child 2022[Jan]; 107 (1): 65-67 PMID34266877show ga
BACKGROUND: High-flow nasal oxygen (HFNO) is frequently used in hospitals, producing droplets and aerosols that could transmit SARS-CoV-2. AIM: To determine if a headbox could reduce droplet and aerosol transmission from patients requiring HFNO. METHODS: The size and dispersion of propylene glycol (model for patient-derived infectious particles) was measured using a spectrometer and an infant mannequin receiving 10-50 L/min of HFNO using (1) no headbox, (2) open headbox, (3) headbox-blanket or (4) headbox with a high-efficiency particulate (HEP) filter covering the neck opening. RESULTS: All headbox set-ups reduced the dispersal of droplets and aerosols compared with no headbox. The headbox-blanket system increased aerosol dispersal compared with the open headbox. The fraction of aerosols retained in the headbox for HFNO of 10 and 50 L/min was, respectively, as follows: (1) open headbox: 82.4% and 42.2%; (2) headbox-blanket: 56.8% and 39.5%; (3) headbox-HEP filter: 99.9% and 99.9%. CONCLUSION: A HEP-filter modified headbox may serve as an effective droplet and aerosol barrier adjunct for the protection of staff caring for children receiving HFNO.
Arch+Dis+Child 2022 ; 107 (1): 65-67
