The CardioWatch 287-2 is a state-of-the-art wearable device engineered to intermittently monitor
non-inasive blood pressure (NIBP) with high accuracy. Accurate NIBP monitoring is essential for
managing various health conditions, including hypertension and cardiovascular diseases, and
provides critical data during perioperative care. Wearable technology such as the CardioWatch 287-2
offers a convenient and non-invasive method for continuous monitoring, significantly enhancing
patient outcomes and providing invaluable data for healthcare providers.

To validate its NIBP algorithm, several clinical studies were conducted across diverse populations, comparing its performance against established reference devices such as arterial line recordings, automated cuff measurements, ambulatory blood pressure monitoring (ABPM), and manual auscultation. These studies aimed to assess the device’s accuracy, reliability, and consistency across various conditions, including resting and active states, different body positions, demographics, and health conditions. The validation process involved rigorous testing under controlled clinical settings and real-world scenarios to ensure the device’s performance is both reliable and robust. The following sections summarize the findings from these extensive validation studies.
Study Summaries
Study Centre: Reinier de Graaf Gasthuis, Delft, the Netherlands
Study Period: October 2022 – February 2023
Publication: DOI: https://doi.org/10.1093/ehjdh/ztae006
Study Population: 97 patients at rest undergoing awake cardiac catheterization
Reference Device: Arterial line
Population Characteristics:
- Age: 67 ± 11 years
- Female: 33 (33%)
- BMI: 27.4 ± 4.5 kg/m²
- Skin type: I-VI
- Clinical BP (systolic / diastolic): 144.2 ± 21.2 mmHg / 81.6 ± 13.0 mmHg
Measurement Pairs: 420 epochs (30 seconds)
Results:
- Systolic: ≤100 mmH in 48 samples (11%) and ≥160 mmHg in 106 samples (25%);
- Diastolic: ≤70 mmHg in 222 samples (53%) and ≥85 mmHg in 99 samples (24%);
- Mean error (systolic / diastolic): ±3.7 (SD ± 4.4) mmHg / ±2.5 (SD ± 3.7) mmHg
- Correlation (systolic / diastolic): R = 0.985 / R = 0.961
- Bias (systolic / diastolic): -0.17 mmHg / 0.2 mmHg
- 95% LoA (systolic / diastolic): -8.74 to 8.4 mmHg / -6.96 to 7.37 mmHg