Lowenstein Medical elisa 300, Instructions For Use Manual

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Ventilation modes and parameters | A 5
Instructions for Use elisa 300-500 | Supplement A | SW 2.09.x | Rev. 11
129
Remark
After input of the body height, the calculated IBW value is dis-
played in the Workbench.
Remark
The ALPV ventilation mode is not available for the treatment of
paediatric patients.
Remark
Mode-specific default alarm limits are set in the ALPV ventilation
mode. The alarm limits are listed in section “13.1.3.3 Default alarm
limits of the ALPV mode”.
A 5.5.25
WOBOV (Work Of Breathing Optimized Ventilation)
WOBOV is a generalist mode that takes promoting spontaneous breathing, suf-
ficient minute ventilation, an energetically optimal breathing pattern and compli -
ance with specific lung protection rules into account. In this mode, the breathing
pattern associated with the highest energy efficiency is continuously calculated
and the ventilation control (modified Otis equation) adapted accordingly. This
control is based on the insights of Rohrer (1925) and Otis et al. (1950), according
to which an energetically optimal breathing pattern reduces negative work of
breathing, promotes spontaneous breathing and prevents dead space ventilation.
At the same time it supports spontaneous breathing by automatically reducing
the assistance provided by the ventilator. In the case of insufficient ventilation,
WOBOV will gradually increase ventilator support, i.e., the algorithm will com-
pensate the deficit up to the pre-set minute ventilation when necessary. In this
mode, both pressure-controlled ventilation with volume guarantee (comparable
to dynamic BiLevel) and pressure-assisted spontaneous breathing with volume
guarantee (dynamic PSV) are available.
In the WOBOV ventilation mode, an adaptive, closed-loop control system con-
trols the ventilator. After input of the patient data (body height, MV support, ...),
the ventilator automatically calculates a secure window (minimum and maximum
tidal volume or respiratory rate).
Remark
After input of the body height, the calculated IBW value is dis-
played in the Workbench.
Referring to automatic measurements of resistance and compliance, the WOBOV