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Cuffless Estimation of Blood Pressure
- Source :
- Ieee Transactions on Biomedical Engineering, 65(11), 2377-2383. IEEE
- Publication Year :
- 2018
- Publisher :
- IEEE, 2018.
-
Abstract
- Objective: Measuring arterial pulse transit time (PTT) to estimate blood pressure (BP) without conventional brachial cuff-based measurement is not new, but is a focus of current wearable technologies research. Much research pertains to efficient, accurate sensing of artery-related waveforms, yet the relationship between PTT and BP receives less attention despite being key for accurate BP estimation. This study investigated BP/PTT calibration by quantifying anatomical site variability ( n = 10, 3 female, age 30 $\pm$ 9 years) and individual variability ( n = 103, 50 female, age 53 $\pm$ 22 years). Methods: BP and pulse wave velocity (PWV) were measured in both seated and supine. Carotid-femoral PWV (cfPWV), carotid-radial PWV (crPWV), and carotid-finger-volume PWV (cvPWV) were measured with the wrist and hand positioned at the level of the upper thigh to achieve the same hydrostatic pressure effect across all measurements. Results: The postural change invoked a small (4 $\pm$ 7 mmHg) change in brachial diastolic BP with an additional 27 $\pm$ 2 mmHg change in hydrostatic pressure. cfPWV decreased in the supine position ( $-$ 1.75 $\pm$ 0.17 m $\cdot$ s−1, p $\Delta$ BP/ $\Delta$ PWV) across the sample population varied from 6.6 to 98.3 mmHg $\cdot$ s $\cdot$ m−1 (mean 22 $\pm$ 14 mmHg $\cdot$ s $\cdot$ m−1) and was correlated with age, heart rate, diastolic and pulse pressure, and weight. These variables did not explain the majority of the variability ( R2 = 0.248). Conclusion: There is anatomical site and between-individual variability in the calibration term for BP estimation from PTT. Significance: Using and accurately calculating hydrostatic changes in BP within the individual may be one method to increase the accuracy of this calibration term.
- Subjects :
- Adult
Male
medicine.medical_specialty
Supine position
0206 medical engineering
Hydrostatic pressure
Biomedical Engineering
Diastole
Vascular Stiffness/physiology
Blood Pressure
02 engineering and technology
030204 cardiovascular system & hematology
Pulse Wave Analysis
03 medical and health sciences
Young Adult
0302 clinical medicine
Vascular Stiffness
Computer-Assisted
Blood Pressure Determination/methods
Internal medicine
Heart rate
80 and over
Medicine
Humans
Carotid Arteries/physiology
Pulse wave velocity
Blood Pressure/physiology
Aged
Aged, 80 and over
business.industry
Blood Pressure Determination
Signal Processing, Computer-Assisted
Middle Aged
medicine.disease
020601 biomedical engineering
Pulse pressure
Femoral Artery
Blood pressure
Carotid Arteries
Pulse Wave Analysis/methods
Calibration
Femoral Artery/physiology
Signal Processing
Arterial stiffness
Cardiology
Female
business
Subjects
Details
- Language :
- English
- ISSN :
- 00189294
- Volume :
- 65
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- Ieee Transactions on Biomedical Engineering
- Accession number :
- edsair.doi.dedup.....5e7fdaf98ceecca4bcf860f4c317afa7