Technical innovation did not stop with Microstream® MCS™ monitoring
technology. Oridion also developed a set of unique components for the
breath sampling circuit. Identified by the trade name, FilterLine®, these
components include the following:
- Normal and high humidity sampling lines for intubated patients
- Sampling lines with nasal cannulae for nonintubated patients
- Airway adapters, provided separately or integrated with the
sample line
The FilterLine® system builds on Microstream® technology to further
solve moisture and occlusion problems prevalent in other capnography
systems.
Sampling Lines
The FilterLine® breath sample circuit incorporates the sample line and
hydrophobic filter in one component. The hollow longitudinal structure
of the filter and its linear orientation allow laminar gas flow within the
sample line, which improves accuracy and response time, even at high
respiratory rates. These features, along with the small sample cell and
low flow rate, give Microstream® its advantage in accurately monitoring
patients with small respiratory volumes.
Positioning Flexibility - Conventional sidestream technology requires
a separate water trap that the clinician must attach in an upright
position in order for it to operate properly. The FilterLine® sampling
circuit, with its built-in filter, can function in any orientation. This
important feature enables monitoring during patient motion or
transport, and eliminates the hassles of maintaining a water trap.
Narrow Microbore Tubing for Fast Response - FilterLine® sampling
circuits are made with microbore tubing that has a 1.0 mm internal
diameter. The small diameter of the sampling line coupled with a
laminar low flow rate shortens the time between a breath and the
waveform appearance on the monitor.
Nafion? Combats Humidity - For high-humidity applications, such as
long-term mechanical ventilation, a special patient-dedicated breath
sampling circuit was developed. This circuit contains Nafion?, which
compensates for humidification by allowing water vapor to escape
through the tubing.
Airway Adapter
The Microstream® airway adapter was engineered with unique features
that prevent occlusions from entering the sampling line, improve
response time, and allow flexibility in positioning the breathing circuit.
The lightweight design reduces the risk of endotracheal tube kinking
and accidental extubation.
Multiple-Channel Design - A conventional airway adapter has only
one sample channel that can easily become obstructed or allow
liquids to penetrate the sample line. The Microstream® airway adapter
has multiple channels with narrow hydrophobic openings, each facing
a different direction. This design permits the airway adapter to be used
in any orientation and prevents the sample line from being occluded by
water or patient secretions.
Narrow Channels for Fast Response - As with the microbore tubing
in the FilterLine® circuits, the small diameter of the airway adapter
channel entries and their proximity to the ventilation path enhances
response time.
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