title: Minute Ventilation Limitations of Two Field Transport Ventilators.
abstract: Knowledge of transport ventilator performance impacts patient safety. This study compared minute ventilation (VE) of the MOVES and Uni-Vent 731 when ventilating the VentAid Training Test Lung with compliance (C) ranging from 0.02 to 0.10 L/cm H2O and three different airway resistances (R) (none, Rp5, or Rp20). Tidal volume (VT) was 800 ± 25 mL. Respiratory rate was increased to ventilator's maximum or until auto-PEEP > 5 cm H2O. Respiratory parameters were recorded with the RSS 100HR Research Pneumotach. Data were reported as median (interquartile range). Peak inspiratory pressure (PIP) of the Uni-Vent and MOVES ranged from 22.3 (22.2-22.5) to 82.6 (82.2-83.2) and 20.8 (20.6-20.9) to 50.6 (50.2-50.9) cm H2O, respectively. VEof the Uni-Vent and MOVES ranged from 17.7 (17.7-17.7) to 31.5 (31.5-31.5) and 11.3 (10.5-11.3) to 20.2 (19.7-20.5) L/min, respectively. Linear regression demonstrated strong, negative correlation of VEwith PIP for the MOVES (VE[L/min] = 26 - 0.31 × PIP [cm H2O], r = -0.97) but weak, positive correlation for the Uni-Vent (r = 0.05). Uni-Vent VEexceeded MOVES VEunder each test condition (p = 0.0002). If patient VErequirements exceed those predicted by the MOVES regression equation, then using the Uni-Vent should be considered.
authors.affiliation: Department of Anesthesiology, Uniformed Services University, Room C-1090, 4301 Jones Bridge Road, Bethesda, MD 20814.
authors.forename: Dale F
authors.initials: DF
authors.lastname: Szpisjak
authors.affiliation: Department of Anesthesiology, Walter Reed National Military Medical Center, 8901 Wisconsin Avenue, Bethesda, MD 20889.
authors.forename: Gregory
authors.initials: G
authors.lastname: Horn
authors.affiliation: Department of Physics, U.S. Naval Academy, 572c Holloway Road, Stop 9c, Annapolis, MD 21402-5002.
authors.forename: Samuel
authors.initials: S
authors.lastname: Shalov
authors.affiliation: Department of Weapons and Systems Engineering, U.S. Naval Academy, 590 Holloway Road, Stop 11A, Annapolis, MD 21402-5025.
authors.forename: Alvin Angelo
authors.initials: AA
authors.lastname: Abes
authors.affiliation: San Antonio Military Medical Center, 3551 Roger Brooke Drive, Fort Sam Houston, TX 78234.
authors.forename: Lauren
authors.initials: L
authors.lastname: Van Decar
mesh_terms: D004867:Equipment Design / Q000592:standards* / Q000706:statistics & numerical data; D004869:Equipment Safety / Q000592:standards / Q000706:statistics & numerical data; D006801:Humans; D061214:Patient Safety; D011175:Positive-Pressure Respiration / Q000706:statistics & numerical data; D018709:Statistics, Nonparametric; D013990:Tidal Volume; D012122:Ventilators, Mechanical / Q000592:standards* / Q000706:statistics & numerical data