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[Development of an algorithm for wrist oscillometric blood pressure-measurement using singular value decomposition]
Chenhai Wang1, Luming Zhang, Jiming Ma
1Fuzhou General Hospital, Nanjing Military Area Command, Fuzhou 350025, China. wangchenhai2006@163.com
Summary
A novel curve fitting algorithm using singular value decomposition (SVD) enhances arterial blood pressure (ABP) measurement accuracy at the wrist by reducing intrinsic noise. This SCFA method shows high correlation with traditional auscultation, improving diagnostic reliability.
Area of Science:
- Biomedical Engineering
- Signal Processing
- Medical Devices
Context:
- Accurate arterial blood pressure (ABP) measurement is crucial for cardiovascular health monitoring.
- Traditional methods can be affected by intrinsic noise, particularly at the wrist.
- Existing algorithms may not fully mitigate structural interference.
Purpose:
- To develop a novel curve fitting algorithm based on singular value decomposition (SVD) to improve wrist-based ABP measurement accuracy.
- To reduce intrinsic noise and interference specific to wrist anatomy.
- To enhance the reliability of non-invasive blood pressure monitoring.
Summary:
- A new Singular Value Decomposition and Curve Fitting Algorithm (SCFA) was developed to isolate dominant oscillation components at the wrist.
- SCFA utilizes these components and cuff pressure to determine ABP via curve fitting.
- Testing on 45 subjects showed a high correlation (0.96) with auscultation, outperforming traditional methods (TCFA).
Impact:
- The SCFA method significantly improves the accuracy of wrist-based arterial blood pressure measurements.
- It offers a more reliable approach to non-invasive blood pressure monitoring by reducing intrinsic interference.
- This advancement has the potential to enhance clinical diagnostics and patient management.
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Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.