Paired assessment of two electromyographic neuromuscular monitors: stimpod NMX450X versus Datex-Ohmeda E-NMT
Authors' conclusion
In routine clinical use, the Stimpod NMS450X and Datex-Ohmeda E-NMT demonstrated poor concordance and high variability, likelyinfluenced by device-specific artifacts, connectivity limitations and electrode sensitivity.
Study context
- Population
- Adults undergoing elective non-cardiac surgery
- Participants
- 24 adults
- Comparison
- Stimpod NMS450X vs Datex-Ohmeda E-NMT electromyography (EMG) neuromuscular monitors
- Outcome
- Agreement between devices (Bland-Altman analysis, repeatability coefficients, concordance correlation coefficient) for TOF counts and TOF ratios recorded at 1-minute intervals
Methodological detailspaired, contralateral simultaneous monitoring
- Paired
- Contralateral simultaneous monitoring
Main finding
As reported in the abstract
Inter-device agreement of TOF count and TOF ratio
| Group | Average train-of-four (TOF)-count values per patient | Average TOF-ratio values per patient |
|---|---|---|
| Datex-Ohmeda | 121 | 71 |
| Stimpod | 56 | 39 |
Average train-of-four (TOF)-count values per patient
Datex-Ohmeda121
Stimpod56
Average TOF-ratio values per patient
Datex-Ohmeda71
Stimpod39
- Repeatability coefficient, 95% CI 0.80-0.83 (poor precision)
- 0.81
- Concordance correlation coefficient (CCC) (weak agreement)
- 0.662
Original publication
Paired assessment of two electromyographic neuromuscular monitors: stimpod NMX450X versus Datex-Ohmeda E-NMT. J Clin Monit Comput. Published 3 February 2026. doi:10.
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