Terumo CDI 550, Operator'S Manual

Page: 43 / 173

choosing system settings chapter 4 4-4
Physiological Alarms
The Physiological Alarm System consists of audible and visual alarms to inform the
user when monitored physiological parameter values are out of range. The specific
parameters monitored are dependent on the modules that are part of the System.
The alarms are activated if any of the monitored parameters are outside of the se-
lected alarm limit ranges. There is no inherent delay in the determination of an alarm
condition.
The minimum and maximum values for each of the monitored blood parameters are
initialized with manufacturer-defined default alarm limits when the product is first
shipped to the customer as shown in the table below.
Manufacturer-Defined Default Alarm Limits
Parameter Minimum Value Maximum Value Units
pH
Arterial
7.10 7.70 pH units
PCO
2
Arterial
30 (4.0) 55 (7.3) mmHg (kPa)
PO
2
Arterial 85 (11.3) 500 (66.7) mmHg (kPa)
K
+ 3.0 7.0 mmol/L
O
2
20 400 ml/min
O
2
50 1500 ml/min
pH
Venous 7.00 7.70 pH units
PCO
2
Venous 35 (4.7) 60 (8.0) mmHg (kPa)
PO
2
Venous 30 (4.0) 65 (8.7) mmHg (kPa)
SO
2
Venous 60 95 %
HCT Venous 24 38 %
Hgb Venous 8.0 12.6 g/dl
The Manufacturer-defined default alarm limits have been determined to be medium
or low priority based on the criteria described in Appendix B. The only low priority
default alarm limits are associated with the O
2
parameter.
The manufacturer-defined default limits are derived from typical clinical values that
occur during cardiopulmonary bypass where user intervention may be required. The
Manufacturer-defined default limits are hard coded and cannot be changed.
The minimum and maximum values for each monitored parameter can be modified by
the user as described below. Specific cases may require adjustment of these limits
from the Manufacturer-defined alarm limits based on the clinical judgment of the user.
The alarm priority does not change even if the alarm limits are changed by the user.
The user should be aware that significant changes from the manufacturer-defined
default limits may not be consistent with the priority alarm conditions listed in the
Appendix B.
D