| Accuracy Assessment | Recommendation | Basis | |
| BP | Medaval | None | When an evaluation is carried out using a non-standard protocol, no inference can be made on accuracy based on a standard protocol. |
Kim J, Chang SA, Park SW. First-in-Human Study for Evaluating the Accuracy of Smart Ring Based Cuffless Blood Pressure Measurement. J Korean Med Sci.. 2024 Jan 15;39(2):e18. doi: 10.3346/jkms.2024.39.e18. PMID: 38225785. Available from: PMC10789523.
Ad Hoc protocol General population (Note: Ad-hoc protocol based on ISO 81060-2:2018. BP Critera based on participants, not measurements. Simultaneous opposite arm comparisons.)
Lee H, Park S, Kwon H, Cho B, Park JH, Lee HY. Feasibility and Effectiveness of a Ring-Type Blood Pressure Measurement Device Compared With 24-Hour Ambulatory Blood Pressure Monitoring Device. Korean Circ J.. 2024 Feb;54(2):93-104. Epub: 2023 Dec 26. doi: 10.4070/kcj.2023.0303. PMID: 38196118. Available from: PMC10864248.
Measurements from the Sky Labs CART-I plus are compared to those from an unidentified ABPM monitor, though not in a formal validation.
Shin JH, Shin J. Evaluation of Applicability and Accuracy of a New Form of Cuffless Blood Pressure Measurement Device, CART-I Plus. Korean Circ J.. 2024 Feb;54(2):105-107. doi: 10.4070/kcj.2024.0016. PMID: 38346697. Available from: PMC10864252.
The publication is a letter or correspondence in which the Sky Labs CART-I plus is referenced.