GE Dash 3000, Service Manual

Page: 233 / 292

Revision A Dash 3000/4000 Patient Monitor 9-9
2000966-339
Assembly Drawings: Theory Of Operation
Cardiac Output
The cardiac output function measures blood temperature and injectate
temperature, and uses the thermal dilution method to calculate cardiac
output. Patient alarms with adjustable high and low limits for blood
temperature are provided. System alarms for sensor failure and unstable
blood temperature are provided.
The monitor accepts the brown color-coded connector (compatible with
the Eagle 4000 monitor and Tram modules).
The cardiac output connector and measurement circuits are shared with
the temperature monitoring function. You cannot use both functions
concurrently. A signal in the patient cable indicates the appropriate
function.
Carbon Dioxide (CO
2
)
The CO
2
function measures inspired and expired CO
2
and respiration
rate using the infrared light absorption technique. The monitor connects
to an external Novametrix Capnostat III sensor that clips to an airway
adapter in the patient’s ventilation circuit. The circuits to drive the
sensor and process its incoming signal are located within the DAS.
Patient alarms with adjustable high and low limits for inspired CO
2
,
expired CO
2
, and respiration rate are provided. An additional patient
alarm for no breath detected is provided. System alarms for various
sensor conditions are provided.
The monitor accepts the yellow color-coded connector.