Lowenstein Medical elisa 300, Instructions For Use Manual, Page: 280 / 457

A 3 | Functions
64
Instructions for Use elisa 300-500 | Supplement A | SW 2.09.x | Rev. 11
Remark
Multi-gas measurement during NIV:
During non-invasive ventilation, leakage of varying degrees and de-
pendent on the ventilation pressure occurs regularly. This means
that the volume expired by the patient and the measured expira -
tory volume will not be the same, which has a considerable effect
on the accuracy of the measurement. Therefore, it is necessary to
critically review the measured values and to evaluate them in the
clinical context.
Remark
The multi-gas sensor LeoLyzer must be configured on the con -
figuration level of elisa 300 / elisa 500 in order to be available
for multi-gas measurement. You can review the current interface
configuration on the standby or ventilation screen under the “Sta -
tus” tab by selecting the second view with a horizontal swipe. If in
doubt, contact your service technician.
A 3.11.2
Measuring principle
The method is based on the measurement of infrared light absorption at wave-
lengths of 4.2 μm, 7.85 μm, and 8.3 μm. The measured amount of light that passes
through the gas to the photo sensor serves as the calculation basis. The con-
centration of CO
2
and anaesthetic gas is calculated from the partial pressure at
atmospheric pressure conditions.
A 3.11.3
Power supply
The multi-gas sensor is powered via the serial (BF) interface of the intensive care
ventilator.
If the main power supply fails, the sensor continues to be powered from the inten-
sive care ventilator as long as the battery of the intensive care ventilator maintains
the ventilation function.
A 3.11.4
Breathing circuit
The CO
2
sensor is compatible with all approved breathing circuits.
A 3.11.5
Integrating the multi-gas sensor LeoLyzer
Insert the airway adapter between the Y-piece and the tube of the breathing cir-
cuit.
Connect the sampling line to the airway adapter by turning the line clockwise.
Connect the sampling line to the water trap by turning the line clockwise.