performance of ventilators at simulated altitude: study of fio2
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Service de Santé des Armées. Performance of ventilators at simulated altitude: study of FiO2. Jean-Pierre Tourtier , Thomas Leclerc, Marc Borne Military hospital Val-de-Grâce, Paris, France. Introduction (1):. Aero medical evacuation: ventilatory support - PowerPoint PPT PresentationTRANSCRIPT
Performance of ventilators at simulated altitude:
study of FiO2
Jean-Pierre Tourtier , Thomas Leclerc, Marc Borne
Military hospital Val-de-Grâce, Paris, France
Servicede Santédes Armées
Introduction (1):
Aero medical evacuation: ventilatory support
Ventilators: turbine technology
Hypobaric
FiO2 preset / assessed / delivered
Introduction (2):
2 ventilators:
T-bird VS02 LTV-1000
Methods (1):
�
Cabin altitude simulation
Methods (2): �
Altitude simulated:
1500 m (4000 feet)
2500 m (6700 feet)
3000 m (3000 feet)
Methods (3): �
Lung simulation: VT1 Bioteck
Normal lung:(resistance : 5.6 cm H2O/L/min ; compliance : 50 ml/cm H2O)
Acute Respiratory Distress Syndrom:(resistance : 3.9 cm H2O/L/min ; compliance : 20 ml/cm H2O)
Methods (4): �
Ventilation parameters:
Lung model Normal lung ARDS
Vt set (ml) 700, 400 400, 250
Respiratory rate 12 20
I/E 1/2 1/1
Fi02 (%) 21,50,90 21, 50, 90
Methods (5): �
Measurements: Actual FiO2
paramagnetic analysis
Methods (6):paramagnetic analysis
focused magnetic field Oxygen is attracted electric potential
« gold standard »
Results (1): Normal lung, ARDS: T-bird VS02
Cabin Altitude
(m)
90 1500 2500 3000
FiO2set
50
50
50
50
Fi02assessed
48
43
55
50
FiO2delivered
49
53
57
61
Results (2): Normal lung, ARDS: T-bird VS02
Cabin Altitude
(m)
90 1500 2500 3000
FiO2set
90
90
90
90
Fi02assessed
87
76
94
84
FiO2delivered
88
96
99
99
Results (3): Normal lung, ARDS: LTV-1000
Cabin Altitude
(m)
90 1500 2500 3000 3000ARDS
Vt 450 ml
FiO2set
50 50
50
50
50
Fi02assessed
49
49
50
50
53
FiO2delivered
50
51
53
54
50
Results (4): Normal lung, ARDS: LTV-1000
Cabin Altitude
(m)
90 1500 2500 3000 3000ARDS
Vt 450 ml
FiO2set
90
90
90
90 90
Fi02assessed
87
76
88
92 92
FiO2delivered
88
96
94
95
90
Results (5): exampleNormal lung, FiO2 set=50%
Conclusion (1): T-bird VS02
�
Variations between FiO2 set and delivered: high
Variations between FiO2 delivered and assessed: high
Inefficacity of ventilators Fi02 analysis
Conclusion (2): LTV-1000
�
Variations between FiO2 set and delivered: moderate
Variations between FiO2 delivered and assessed: high
Inefficacity of ventilators Fi02 analysis
Conclusion (3): OXYMAN
�