Natus Trex™ HD
Natus · Model Trex™ HD
A full featured EEG system in an ambulatory device [b]A small, lightweight, multi-channel ambulatory recorder[/b] Often the only way to capture a sleep, cardiac or neurological event is to use an ambulatory device in a patient's home environment. Regardless of where it’s used, the device must be durable and comfortable, with dependable signal quality and long battery life. Trex HD is a multi-modality, full channel ambulatory recorder that's small, lightweight and delivers reliability, flexibility and performance. Trex HD operates easily and affordably on two AA batteries and also provides extended recording, with storage capacity up to 96 hours of data. Trex HD will promote a successful EEG screening while providing the screening data required. Trex HD features 24 AC channels, 4 differential channels and 4 DC channels plus oximetry data. It's dual purpose – providing you with both sleep and EEG functionality – and therefore cost effective. Trex HD easily connects to a PC via a high-speed USB cable, and it can upload 24 hours of EEG data in less than 5 minutes. Combined with Natus NeuroWorks™, our proprietary software solution, the system enhances workflow with easy, intuitive functions to help you efficiently and effectively review data. [b]Fully synchronized High-Definition ambulatory video EEG[/b] Trex HD utilizes wireless Bluetooth connectivity for perfect EEG video synchronization. Trex HD is capable of recording up to 48 hours of HD video directly on a camcorder memory card eliminating virtually all cabling and making it the most user-friendly video ambulatory system in the industry. You can get high quality video without limiting the patient, even throughout the night utilizing camera nightshot mode. This provides you with the convenience and cost-effectiveness of at-home ambulatory monitoring, and your patients a comfortable and simplified video EEG study right in their own home.
Key tips
- ·Electrode impedance drives data quality more than almost any other single factor - check it before assuming an amplifier fault.
- ·Pre-case verification of intraoperative monitoring equipment isn't optional - a mid-case failure has direct surgical-decision consequences.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Noisy / high-impedance channels
HighSymptoms: Mains hum, drift or flat channels, persistently high electrode impedance, poor recording quality.
Root cause: Electrode / lead-wire wear, the electrode box (headbox) inputs, or poor skin prep / environment.
Headbox / amplifier fault
MediumSymptoms: A block of channels dead or saturated regardless of electrode, calibration / bio-cal fails.
Root cause: Headbox amplifier or its cable to the acquisition unit.
Amplifier-to-PC link / acquisition fault
MediumSymptoms: Recording drops, amplifier not detected, data gaps.
Root cause: USB / fibre / network link or a driver.
Photic stimulator / video / audio fault (diagnostic EEG/PSG)
LowSymptoms: Photic strobe not firing, no synchronised video, no audio.
Root cause: Photic lamp / trigger, the video camera, or the audio path.
PSG sensor fault (airflow / effort / SpO2 / limb)
LowSymptoms: A PSG channel (thermistor, pressure, RIP belt, SpO2, PLM) flat or noisy.
Root cause: Worn PSG sensor or its cable.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Electrode lead set / headbox leads
Class Frequent wear itemRel. cost $$R&R Easy
Headbox / amplifier
Class Major service partRel. cost $$$R&R Moderate
Amplifier link cable / interface
Class Periodic replacementRel. cost $$R&R Fairly easy
Photic stimulator lamp (diagnostic)
Class Periodic replacementRel. cost $$R&R Fairly easy
PSG sensor set (airflow / effort / SpO2)
Class Frequent wear itemRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Electrode lead set / headbox leads | Frequent wear item | $$ | Easy |
| Headbox / amplifier | Major service part | $$$ | Moderate |
| Amplifier link cable / interface | Periodic replacement | $$ | Fairly easy |
| Photic stimulator lamp (diagnostic) | Periodic replacement | $$ | Fairly easy |
| PSG sensor set (airflow / effort / SpO2) | Frequent wear item | $$ | Easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Electrode / lead impedance check
- ·Amplifier calibration
- ·Annual electrical safety test
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Noisy or high-impedance channels
- Check and re-prep electrode sites; confirm impedances are balanced and low.
- Swap the affected leads and try different headbox inputs.
- Run the bio-calibration / calibration signal.
- Address mains interference (route cables, check the ground).
- Replace the lead set or headbox as isolated.
Symptom: Amplifier not detected / recording drops
- Reseat the amplifier-to-PC link at both ends.
- Restart the acquisition software and amplifier.
- Try a different port / cable.
- Update the driver / firmware if indicated.
- Replace the link cable or refer the amplifier.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Neurology / EEG lab
- ICU (continuous EEG monitoring)
- Operating Room (intraoperative monitoring)
Documents & Manuals
Related calculators
From BioLab, for work done with this kind of equipment.
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