Blood pressure is a crucial indicator of the human cardiovascular system and plays an essential role in diagnosing diseases, monitoring treatment progress, and predicting outcomes. However, most current blood pressure measurement methods rely on the automated oscillometric technique (cuff-based inflation and deflation), which provides readings at specific moments and struggles to offer real-time monitoring. This limitation makes it challenging to track trends or detect sudden changes in blood pressure. Additionally, external factors like stress, emotions, and physical activity can influence these readings, further complicating accurate assessments.
Recently, Dalian United Holdings introduced a groundbreaking sleeveless blood pressure monitoring solution developed by Betterlife. This innovative system enables simultaneous collection and analysis of electrocardiogram (ECG) and volumetric pulse wave signals. By synchronizing these signals, the device can extract vital physiological metrics such as blood pressure, heart rate, and detailed ECG information in real-time. The gathered data can then be transmitted via Bluetooth Low Energy (BLE) or Wi-Fi for further analysis or storage.
Continuous blood pressure monitoring is particularly valuable for preventing cardiovascular events and providing clinicians with more comprehensive insights into patients' health statuses. In critical care settings, tracking blood pressure trends over time offers actionable intelligence that traditional spot checks cannot match.
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*Figure 1 - Functional Framework of Betterlife’s Sleeveless Blood Pressure Monitoring Solution*
The technology behind this solution involves advanced algorithms that fuse ECG and photoplethysmography (PPG) signals. First, noise reduction techniques—such as median filtering—are applied to remove high-frequency disturbances before wavelet transform-based baseline drift correction addresses low-frequency variations caused by body motion or respiration. Next, a differential threshold approach identifies key features within both the ECG and PPG envelopes, extracting parameters like pulse transit time (PTT). Combining PTT with established correlations between blood pressure and PTT allows derivation of precise blood pressure models without requiring invasive procedures.
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*Figure 2 - Application Scenarios Featuring Betterlife’s Sleeveless Blood Pressure Monitoring Solution*
**Key Features Include:**
- Raw data acquisition for both ECG and PPG signals.
- Built-in 3.3V power supply.
- Flexible primary/secondary board configuration options.
- Compatibility with I²C interfaces for PPG signal integration.
This advancement represents a significant leap forward in wearable healthcare technology, empowering users with continuous, non-intrusive monitoring capabilities previously unavailable outside clinical environments. As wearable devices continue integrating seamlessly into daily life, solutions like Betterlife's promise not only to enhance individual wellness but also support broader public health initiatives worldwide.
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