Treaton MV200, Руководство пользователя

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4.21 "Open valve" function
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4.21 "Open valve" function
The "Open valve" function reflects the current trend of maintenance and support of spontaneous
breathing at all stages of the ventilation.
The "Open valve" allows the patient to breathe freely during any phase of the hardware respira-
tory cycle.
The "Open valve" function operates in all ventilation modes. In ventilation modes with volume
control (CMV/VCV, SIMV/VC), the "Open valve" function operates in the inspiratory phase.
The “Open valve” function does not operate during static compliance measurement.
1 – hardware inspiration
2 – hardware expiration
3 – spontaneous inspiration
4 – spontaneous expiration
Figure 4.16 – Spontaneous inspirations and expiration at any phase of ventilator’s breathing
cycle
“Open valve” function increases flow of the inspired mixture in the presence of spontaneous pa-
tient’s effort, allowing him to breathe (3) regardless of the hardware respiratory cycle phase (1,
2) and opens the expiration valve at the patient’s attempt of exhalation (4) independently the
phase of the hardware respiratory cycle (1, 2). The device will maintain the pressure corres-
ponding to the phase of the ventilator’s breathing cycle.
Note:
The sensitivity threshold of the function is 0.2 mbar
Paw
F(t)
1
2
3
3
4
4