User's Manual

Capnography
21-11
Selecting a Text Format
You can change display formats for capnography by switching between large and
small text (refer to Display Detail on page 21-6).
Freezing the Waveform
You can freeze the waveform display at any time. The waveform stays frozen until
you press the FREEZE ON/OFF key again or until you press the NORMAL
SCREEN key.
Recording Waveforms
You can print Capnography waveforms and values. Refer to Printing on page 4-7
for additional information.
Calibrating the Sensors
Calibrating O
2
A ZERO calibration establishes baseline values for the oxygen channel. You are
prompted to perform a ZERO calibration if it is required.
A room O
2
span calibration calibrates the oxygen sensor using room air.
A 100% O
2
span calibration sets the level for oxygen so that the display reads
100% when pure oxygen is input to the unit. For improved accuracy, a 100% O
2
span calibration should be performed whenever the patient is receiving more than
60% O
2
.
!
• To minimize patient disruptions, perform O
2
zero and span
procedures before the O
2
adapter is placed in the ventilator
circuit.
!
• Authorized service personnel also use the 100% O
2
span
calibration to calibrate the oxygen sensor’s response to
100% O
2
.
To switch text formats:
1 Touch GAS.
2 Touch SETUP.
3 Select LARGE TXT or SMALL
TXT.
To freeze the gas waveform:
1 Touch GAS.
2 Select FREEZE ON.
To print gas waveforms:
1 Touch RECORD.
2 Touch flashing GAS parameter.
key.
To calibrate O
2
using room air
1 Touch GAS.
2 Touch CAL.
3 Touch O2CAL.
4 Disconnect O
2
cell and touch
ZERO.
5 Reconnect O
2
cell.
6 Ensure that O
2
cell is in room air
7 Wait for the O
2
reading to
stabilize.
8 Touch ROOM O2 SPAN.
To calibrate O
2
by performing a
100% O
2
span
1 Touch GAS.
2 Touch CAL.
3 Touch O2 CAL.
4 Flow 100% O
2
through the O
2
airway adapter and wait for O
2
readings to stabilize.
5 Touch 100% O2 SPAN.