Model note · EMG
Natus Viking EMG on the Nicolet EDX platform
Viking is Natus' long running electrodiagnostic line, now sold as the Nicolet EDX system, used in neurophysiology and neuromuscular clinics for nerve conduction studies, needle EMG and evoked potentials, and in theatres for intraoperative monitoring. The platform pairs a base console with built in electrical and auditory stimulators, a 2 or 8 channel isolated amplifier and a PC running the Natus software, which handles tests such as F waves, H reflexes, single fibre EMG and repetitive nerve stimulation.
The model
Maker, model and type.
- Maker
- Natus Neurology Incorporated, Middleton, Wisconsin (formerly CareFusion / Nicolet)
- Model
- Natus Viking EMG on the Nicolet EDX platform (earlier Viking Select and Viking Quest systems)
- Device type
- EMG
- Main document
- Open the public document
Key specifications
What the public record says.
| Item | Value | Source |
|---|---|---|
| Amplifier channels | 1 to 8 isolated channels (2 or 8 channel amplifier) | Source |
| CMRR | Above 110 dB, 115 dB typical | Source |
| Noise | Below 0.6 uV RMS from 2 Hz to 10 kHz | Source |
| Input impedance | Above 1000 megohm | Source |
| Filters | Low filter 0.05 Hz to 5 kHz; high filter 30 Hz to 20 kHz; 50/60 Hz notch | Source |
| Conversion | 24 bit A/D; 384 kHz cumulative sampling | Source |
| Electrical stimulator | 1 or 2 stimulators, constant current or constant voltage, up to 100 mA or 400 V, 0.01 to 1 ms, single or train, biphasic | Source |
| Auditory stimulator | Click, pip or burst, 0 to 139 dB pSPL, 125 to 8000 Hz | Source |
| Impedance meter | 500 ohm to 480 kilohm | Source |
| Power and isolation | Mains 100 to 240 V AC, through an isolation transformer depending on configuration; optic or transformer patient isolation | Source |
| FDA clearance | 510(k) K243982 (Nicolet EDX with Natus Elite), decision 22 January 2025; predicate K120979 (CareFusion Nicolet EDX, 2012); primary product code GWF | Source |
Recalls
Recalls.
This note lists no recalls. Check the FDA recall database for the latest record.
Safety
Safety warnings from the record.
- Labelling limits use in the presence of flammable anaesthetics and with defibrillation equipment. Source
- Patients have been burned at stimulating or needle electrode sites, including during single fibre EMG and during long procedures with electrosurgery. Source
- The electrical stimulator output reaches 100 mA in constant current mode or 400 V in constant voltage mode, so output settings carry real burn and discomfort risk. Source
- The system gives no diagnostic conclusion and is for qualified healthcare providers only. Source
Sources
Where this note comes from.
- FDA 510(k) summary K243982, Nicolet EDX
- FDA 510(k) database K120979, CareFusion Nicolet EDX
- openFDA MAUDE problem counts, Natus Viking
- openFDA MAUDE narratives, Natus Viking
Not covered: No FDA recall was found for the Natus Viking or Nicolet EDX (Viking recalls in the database are for unrelated patient lifts and catheters), the Viking user guide is only on a third party library behind a terms agreement, and no public error message list was found.
BMEssentia knowledge drafted from public information, reviewed by Hasan Khaled Ismail on 2026-10-24. Always follow the manufacturer's instructions for use and service manual.