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Sensors 2010, 10(8), 7146-7156; doi:10.3390/s100807146

A Piezoelectric Plethysmograph Sensor Based on a Pt Wire Implanted Lead Lanthanum Zirconate Titanate Bulk Ceramic

Centro de Investigación y de Estudios Avanzados del IPN, Electrical Engineering Department, Bioelectronics Section. Av. IPN 2508, Col. San Pedro Zacatenco, C.P. 07360, México D.F., Mexico
* Author to whom correspondence should be addressed.
Received: 15 June 2010 / Revised: 30 June 2010 / Accepted: 15 July 2010 / Published: 29 July 2010
(This article belongs to the Special Issue Sensors in Biomechanics and Biomedicine)
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This work reports on the development of a Lead Lanthanum Zirconate Titanate (PLZT) bulk ferroelectric poled ceramic structure as a Piezoelectric Plethysmograph (PZPG) sensor. The ceramic was implanted during its fabrication with a platinum (Pt) wire which works as an internal electrode. The ceramic was then submitted to an experimental setup in order to validate and determine the Pt-wire mechanical effects. This PZPG sensor was also mounted on a finger splint in order to measure the blood flow that results from the pulsations of blood occurring with each heartbeat. Fingertip pulses were recorded jointly with an ECG signal from a 25 year old male to compare the time shift; the PZPG sensor guarantees the electrical isolation of the patient. The proposed PZPG has several advantages: it can be adjusted for fingertip measurements, but it can easily be extended by means of spare bands, therefore making possible PZPG measurements from different body locations, e.g., forehead, forearm, knee, neck, etc.
Keywords: PLZT application; ceramic implants; plethysmography PLZT application; ceramic implants; plethysmography
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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González-Morán, C.O.; Flores-Cuautle, J.A.; Suaste-Gómez, E. A Piezoelectric Plethysmograph Sensor Based on a Pt Wire Implanted Lead Lanthanum Zirconate Titanate Bulk Ceramic. Sensors 2010, 10, 7146-7156.

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