Dräger Babylog 8000 Service Manual

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_ _Printed on_18.05.05_F61733XXT01.fm
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Dräger Medical AG & Co. KGaA 6173.3
Function description Babylog 8000
A two-step calibration with 21% and 100% O
2
is always carried out in order to achieve a higher
measurement accuracy over the whole concentration range and/or to be able to recognize a spent sensor
cell.
The calibration procedure is described under section "4 Monitoring Functions".
If the O
2
measurement fails, the Babylog generates an alarm. This alarm status is shown in the status
field of the screen by the flashing indication "FiO
2
".
3.4 Patient Flow (Babylog 8000/Babylog 8000 plus)
A direction-sensitive hot-wire flowmeter integrated into the Y-piece measures the inspiratory and
expiratory flows through the tube. This measurement function must be reactivated each time after
switching on Babylog 8000/Babylog 8000 plus and after each replacement of the sensor by calibrating the
sensor. The flow signal is used to calculate the following values:
 Tidal volume (V
T
)
 Minute volume (MV)
 Percentage of the MV uptake through spontaneous breathing
 Tube leakage
The tidal volume is the expiratory flow signal applied between two breathing phase cycles.
Unlike the tidal volume, the minute volume is not related to a respiratory cycle. In the same way the
inspiratory MV is calculated for leak rate detection. The expiratory minute volume is displayed. In addition
to the complete minute volume, Babylog also calculates the expiratory minute volume uptake through
spontaneous breathing.
Babylog calculates the percentage by comparing the total minute volume and the minute volume uptake
through spontaneous breathing:
spont. = (MVspontaneous/MV)
*
100%
The leakage at the tube can be estimated by comparing the inspiratory and the expiratory minute volume.
The leakage at the tube L is calculated as follows:
L= (MVinsp
_
MVexp)/(MVinsp + MVexp)
*
100.
The respiratory rate f is measured through the inspiratory respiratory phase cycles.
All measured values derived from the patient flow become valid only after successful calibration of the
flow sensor.
If the flow sensor or the measuring electronics fails, an alarm is generated. However, Babylog can still be
used without the functions depending on the flow measurement. This alarm status is shown in the status
field of the screen by the flashing indication "flow".

Dräger Babylog 8000 Specifications

General

Leak Compensation	Yes
Type	Ventilator
Pressure Range	0 to 80 mbar
Tidal Volume Range	2-2000 mL
Frequency	1-150 breaths/min
Inspiratory Time	0.1-3.0 sec
PEEP	0 to 20 mbar
FiO2 Range	21-100%
Power Supply	100 to 240 V AC, 50/60 Hz