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
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Electrode impedance high
MediumSymptoms: Noisy / flat channels, impedance alarm.
Root cause: Dry gel, poor contact.
Amplifier channel fault
MediumSymptoms: Dead channel, artifact.
Root cause: Front-end amplifier failure.
Stimulator output fault
MediumSymptoms: No stimulus delivered.
Root cause: Stimulator circuit wear.
Grounding / isolation issue
LowSymptoms: 50/60 Hz interference.
Root cause: Shield/ground break.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
Patient electrode gel
Consumable.
Class ConsumableRel. cost $R&R Easy
Amplifier channel module
Class Periodic replacementRel. cost $$$R&R Difficult
Stimulator cable
Class Periodic replacementRel. cost $$R&R Fairly easy
EEG electrode cap / cup
Frequent R&R.
Class Periodic replacementRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Patient electrode gel Consumable. | Consumable | $ | Easy |
| Amplifier channel module | Periodic replacement | $$$ | Difficult |
| Stimulator cable | Periodic replacement | $$ | Fairly easy |
| EEG electrode cap / cup Frequent R&R. | Periodic replacement | $$ | 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 structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Electrode impedance high
- Confirm the presentation - typically noisy / flat channels, impedance alarm - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: dry gel, poor contact.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the eEG electrode cap / cup per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Amplifier channel fault
- Confirm the presentation - typically dead channel, artifact - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: front-end amplifier failure.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the patient electrode gel per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
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
Troubleshoot this device with Bio
Describe a symptom or error code. Bio answers from this device's own documented error codes, failure modes, parts, and guides.
Ask Bio →