Hamilton G5 - Additional Notes about Using Noninvasive Ventilation

624074/07 D-9
In order to estimate the exhaled tidal volume, the expiratory
minute volume, the spontaneous expiratory minute volume
and the minute volume lost over the leakage the monitoring
parameters VTE, ExpMinVol, MVSpont and Leak are exchanged
with VTE NIV, ExpMinVol NIV, MVSpont NIV and MVLeak.
These NIV parameters take into account the measured leak
during non-invasive ventilation.
While a leak at the patient interface influences the tidal volume
measurement, leaks in the breathing circuit itself do not influ-
ence the tidal volume measurement.
In addition to all the other clinical parameters, TI, Ppeak, PEEP/
CPAP, I:E, fTotal, Pmean, and fSpont can be used to assess the
patient’s ventilatory status, as usual.
D.10 Additional notes about using noninvasive ven-
tilation
NOTE:
If the mask fit cannot be improved, select an alternative
treatment method.
Due to some unique characteristics of noninvasive ventilation,
consider the following points when using it. Consistent with
best practices, monitor the patient closely to evaluate the
adequacy of the prescribed therapy.
IntelliTrig (intelligent trigger) function. With its IntelliTrig
function, the ventilator can automatically adapt to changing
breath patterns and system leaks to achieve optimum synchro-
nization between patient and device.
To synchronize, IntelliTrig compensates any leaks and resis-
tances between the ventilator and the patient, and with each
breath it measures the leakage at the patient interface (mask).
With this information IntelliTrig adapts the trigger mechanism
so leakage and the changing breath pattern do not influence
the operator-set trigger sensitivity (flow trigger).
For information on leak compensation, see Section B.6.