Flexible Wireless Pressure Sensor for Monitoring Heart Pressure
Author Information
Author(s): Hernández-Sebastián Natiely, Diaz-Alonso Daniela, Barrientos-García Bernardino, Renero-Carrillo Francisco Javier, Calleja-Arriaga Wilfrido
Primary Institution: Centro de Investigaciones en Óptica, A.C., CIO, Leon, Mexico
Hypothesis
Can a flexible, wireless pressure sensor effectively monitor ventricular pressure continuously?
Conclusion
The study successfully developed a flexible wireless pressure sensor that can monitor ventricular pressure in a range from 5 to 300 mmHg with high sensitivity and low response time.
Supporting Evidence
- The sensor demonstrated a sensitivity of approximately 0.58 pF/mmHg.
- The response time of the sensor was measured at 220 ms.
- The sensor was validated in a controlled pressure chamber showing capacitance changes from 5.68 pF to 33.26 pF across the pressure range.
- The wireless system maintained functionality at sensing distances greater than 3.5 cm.
- The output voltage varied from 502.54 mV to 538.29 mV throughout the full pressure range.
Takeaway
Researchers created a special sensor that can be put inside the heart to check blood pressure without needing wires. It can tell how much pressure is there all the time.
Methodology
The sensor was designed using surface micromachining and flexible electronics, integrating a two-variable capacitor array and a dual-layer coil on a flexible substrate.
Limitations
The sensor's performance may be affected by misalignment and the need for further optimization of the electronic interface.
Digital Object Identifier (DOI)
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