User's Manual Part 3

6-17
6.3.1.1. Sampling Lines
The IRadimed 3880 uses low maintenance and easy to apply sampling lines.
There are two basic types of sample lines. One type is via P/N 1842 A, P, or I type nasal
cannula. These cannula are to be used on non-ventilated/intubated patients not receiving
anesthetic agents, see 6.3.3.2. These nasal cannula will only mate with the built in CO2 only
option.
The second method is the P/N 1849 CO2/Agent Multi-Gas ‘Nomoline’ sample line for sampling
patient airway gases directly from intubated patients. This sample line will only mate with the
inlet connection of the Multi-Gas CO2/Agent Multi-Gas system of the 3865 option. See 6.3.3.1
Both types of sample lines are single patient use and include filters to prevent contaminates
from entering the gas measurement unit of the 3880 MRI Monitor system.
The sampling lines work as follows:
1. Patient gas sample enters sampling line from patient breathing via airway tap or nasal canula
circuit and passes through the gas sample line to the 3880 monitor
2. Gas sample is transported through the sample line and into the CO2 unit
3. Polymer absorbs water from the patient’s gas sample and evaporates it into surrounding air
4. Gas sample enters the IR cuvette where it is analyzed to accurately determine gas
concentration
6.3.1.2. Limitations
The following factors may influence the accuracy of measurement:
• Leaks or kinks in the line
• Mechanical shock
• Airway pressure
• Improper accessories for patients breathing style
6.3.2. Understanding the Display
1. CO
2
Measurement Unit (%, mmHg or kPa)
2. Respiration Measurement Unit (rpm)
3. Current Respiration Rate Vital Sign value
4. Current Respiration Alarm Limits
5. Current EtCO
2
Vital Sign value
6. Current EtCO
2
Alarm Limits
7. Respiration Waveform
8. CO2 wave scale
9. Current inspired CO
2
value
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