RT Journal Article
SR Electronic
T1 The Site of Oxygen Delivery Into a Home Ventilator Affects Recorded Volumes
JF Respiratory Care
FD American Association for Respiratory Care
SP 288
OP 292
DO 10.4187/respcare.06829
VO 65
IS 3
A1 Erwan d'Aranda
A1 Pierre-Julien Cungi
A1 Quentin Mathais
A1 Mickaël Cardinal
A1 Pierre Esnault
A1 Cédric Nguyen
A1 Julien Bordes
A1 Eric Meaudre
A1 Philippe Goutorbe
YR 2020
UL http://rc.rcjournal.com/content/65/3/288.abstract
AB BACKGROUND: Long-term home mechanical ventilation is increasingly used by patients with chronic respiratory failure. Storage of medical data in the cloud is expanding, and ventilation can be monitored remotely. The aim of this bench study was to determine whether tidal volume (VT) can be affected by the location of supplemental oxygen placement.METHODS: We tested 4 home ventilators in a bench test using a dual-chamber test lung to test the addition of supplemental oxygen placement via a connector in the circuit (ie, front intake port) versus via the manufacturer's rear intake port, with different oxygen supply flows of 2, 4, 6, and 8 L/min. We compared the effectively delivered VT as measured with a pneumotachograph (ie, measured VT) versus the VT reported by each home ventilator (ie, monitored VT).RESULTS: For all of the home ventilators, the monitored VT and measured VT were comparable when the rear oxygen intake was used, regardless of oxygen flow. However, when the front oxygen intake was used, the monitored VT as measured by the ventilators was significantly lower than the measured VT, with the greatest difference reaching 29% for the highest oxygen flow tested (8 L/min).CONCLUSIONS: The monitored VT may be inaccurate if oxygen is added with a connector in the circuit, which may have consequences on both the individual level and collective level (ie, big data analysis). Physicians who analyze data from home ventilators should be aware of the site of oxygen supplementation and promote use of only the rear oxygen intake.