Abstract:
AIM:The aim of this study is to compare the high-frequency pressure amplitude (oscillatory change in pressure (ΔP)) and tidal volume (high-frequency tidal volume at the airway opening (VTHF )) delivered by the Dräger VN500 (Drägerwerk Ag & Co., Lübeck, Germany) and the Sensormedics 3100 (SM3100; CareFusion, San Diego, CA, USA) through a range of oscillatory frequencies. METHODS:In this benchtop study, high-frequency oscillations were applied to an infant test lung at unrestricted set amplitudes. Pressure and flow were measured as a function of frequency, incremented by 1 Hz from 5 to 15 Hz. Measurements were repeated for a range of ventilator settings, and lung resistive and compliance states. RESULTS:The VN500, but not the SM3100, demonstrated an exponential decrease in airway opening ΔP as frequency increased. The difference between the SM3100- and VN500-delivered VTHF became greater with each frequency increment. At 15 Hz, VN500 VTHF was 49% of SM3100 VTHF . CONCLUSIONS:The VN500 demonstrates a frequency-related reduction in ΔP not observed in the SM3100. Clinicians need to be aware of these differences in performance characteristics.
journal_name
J Paediatr Child Healthjournal_title
Journal of paediatrics and child healthauthors
John J,Harcourt ER,Davis PG,Tingay DGdoi
10.1111/jpc.12398subject
Has Abstractpub_date
2014-01-01 00:00:00pages
27-31issue
1eissn
1034-4810issn
1440-1754journal_volume
50pub_type
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