A Low-Range Drift-Free Bio-compatible Pressure Sensor Based on P(VDF-TrFE) Piezoelectric Thin Film

2009 ◽  
Vol 1222 ◽  
Author(s):  
Xiaoyang Li ◽  
Timothy Reissman ◽  
Fan Yu ◽  
Edwin C. Kan
Keyword(s):  
Thin Film ◽  
Blood Pressure ◽  
Pressure Sensor ◽  
Equivalent Circuit Model ◽  
Swelling Pressure ◽  
Pressure Monitoring ◽  
Sensing Element ◽  
Piezoelectric Resonance ◽  
Piezoelectric Thin Film

AbstractA low-range pressure sensor (0-100kPa) based on the P(VDF-TrFE) piezoelectric thin film is proposed, where the long-term drift is eliminated by operating near the piezoelectric resonance. The pressure sensor is designed for blood pressure and tissue swelling pressure monitoring. The poled 50μm±1μm P(VDF-TrFE) copolymer film is used as the sensing element, with all fabrication and assembly materials biocompatible. A modified Butterworth-Van Dyke (BVD) [1] equivalent circuit model is used to characterize the sensor behavior. The pressure sensor exhibits negligible drift in weeks of operation. The device shows a sensitivity of 0.038MHz/kPa resonance frequency shift under stress, which leads to a maximum readout change of 1.1%/kPa in the present setup.

Long-Term Validation of a Blood Pressure Sensor at the Chest

2013 ◽  
Author(s):  
J Solà ◽  
M Proença ◽  
A Falhi ◽  
D Ferrario ◽  
O Grossenbacher ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Pressure Sensor

scholarly journals The Importance of Home Versus 24-Hour Ambulatory Blood Pressure Monitoring and Assessment of Blood Pressure Variability in Hypertension

2016 ◽  
Vol 62 (2) ◽  
pp. 239-242
Author(s):  
Annamária Magdás ◽  
Boglárka Belényi ◽  
Adina Gaburoi ◽  
Alexandru Incze
Keyword(s):  
Blood Pressure ◽  
Ambulatory Blood Pressure ◽  
Blood Pressure Variability ◽  
Blood Pressure Monitoring ◽  
Home Blood Pressure ◽  
Home Blood Pressure Monitoring ◽  
Pressure Monitoring ◽  
Hypertensive Patients ◽  
Variability Index

AbstractBackground: A number of studies reveal that home blood pressure variability is associated with cardiovascular risk factors. However, we do not have a consensus regarding the variability index and the frequency of measurements.Objective: The aim of the study was to assess home blood pressure variability for a period of 7 consecutive days and 24-hour ambulatory blood pressure variability using the average real variability index and to test whether home blood pressure variability represents a suitable parameter for long-term monitoring of the hypertensive patients.Material and methods: A number of 31 hypertensive patients were included in the study, 8 male, 23 female, mean age 60.19±7.35 years. At the inclusion ambulatory blood pressure monitoring was performed, home blood pressure monitoring was carried out for 7 consecutive days with 2 measurements daily. We compared ambulatory blood pressure values, variability using paired t-test. We were looking for correlations between HBP values and cardiovascular risk factors.Results: Ambulatory versus home blood pressure derived mean blood pressure was 131.38±15.2 versus 131.93±8.25, p=0.81. Ambulatory derived variability was 10.65±2.05 versus home variability 10.56±4.83, p=0.91. Home versus ambulatory pulse pressure was 51.8± 9.06 mmHg vs. 54.9±11.9 mmHg, p=0.046. We found positive correlation between HBPV and home BP values, p=0.027, r2=0.1577, (CI: 0.04967 to 0.6588). Home, as well as ambulatory derived variability were positively correlated to age p=0.043, r2=0.1377 (CI: 0.01234 to 0.6451) versus p<0.0001, CI: 0.3870 to 0.8220, r2=0.4302.Conclusion: Assessment of home blood pressure monitoring and variability could represent a well-tolerated alternative for long-term follow-up of hypertension management.

scholarly journals TCT-105 Long-term Intravascular Blood-Pressure Monitoring with a Novel, Wireless Sensor System – Results from Chronic In-vivo Studies

2012 ◽  
Vol 60 (17) ◽  
pp. B33
Author(s):  
Nina Cleven ◽  
Anna Woitok ◽  
Peter Isfort ◽  
Tobias Penzkofer ◽  
Michael Görtz ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Blood Pressure Monitoring ◽  
Sensor System ◽  
Wireless Sensor ◽  
In Vivo Studies ◽  
Pressure Monitoring
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