Perioperative medicine & outcomes
Accuracy of vital sign monitoring using a photoplethysmography upper arm wearable device in postoperative non-cardiac surgery patients: a prospective observational clinical validation study
Authors' conclusion
The viQtor® device demonstrated high accuracy for RR, HR, and SpO₂ in postoperative patients.
Study context
- Population
- Postoperative non-cardiac surgery patients in the Post-Anesthesia Care Unit (PACU)
- Participants
- 42 patients
- Comparison
- PPG-based upper arm wearable vs standard PACU monitoring
- Outcome
- Accuracy of RR, HR and SpO₂ vs reference (Bland-Altman; Clarke Error Grid)
Methodological detailsMedian monitoring duration 14.0 hours
- Median monitoring duration 14.0 hours
Performance
As reported in the abstract
Agreement with reference (ARMS, bias, 95% LoA)
| Test or model | RR Average Root Mean Square (ARMS) | RR bias (95% LoA) | HR ARMS | HR bias (95% LoA) | SpO2 ARMS | SpO2 bias (95% LoA) |
|---|---|---|---|---|---|---|
| viQtor® | 2.85 BRPM | −0.40 (−5.85 to 5.04) | 2.01 BPM | 0.08 (−3.83 to 3.99) | 2.08% | −0.03 (−4.14 to 4.09) |
viQtor®
RR Average Root Mean Square (ARMS)2.85 BRPM
RR bias (95% LoA)−0.40 (−5.85 to 5.04)
HR ARMS2.01 BPM
HR bias (95% LoA)0.08 (−3.83 to 3.99)
SpO2 ARMS2.08%
SpO2 bias (95% LoA)−0.03 (−4.14 to 4.09)
Further findings
- Data availability high across all three parameters; patient satisfaction excellent
Original publication
Accuracy of vital sign monitoring using a photoplethysmography upper arm wearable device in postoperative non-cardiac surgery patients: a prospective observational clinical validation study. J Clin Monit Comput. Published 22 September 2025. doi:10.
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