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Abstract

Implantable Blood Pressure Sensors with Analogic Thermal Drift Compensation †

1
Faculté des Sciences et Techniques, Université de Nantes, CNRS, IETR UMR 6164, 2 Chemin de la Houssinière, 44322 Nantes, France
2
L’institut Du Thorax, Université de Nantes, INSERM, CNRS, INSERM UMR 1087/CNRS UMR 6291, 8 Quai Moncousu, 44007 Nantes, France
*
Authors to whom correspondence should be addressed.
Presented at the 8th International Symposium on Sensor Science, 17–28 May 2021; Available online: https://i3s2021dresden.sciforum.net/.
Published: 17 May 2021
(This article belongs to the Proceedings of The 8th International Symposium on Sensor Science)

Abstract

:
Implantable pressure sensors represent an important part of the research activity in laboratories. Unfortunately, their use is limited by cost, autonomy and temperature-related drifts. The cost of use depends on several parameters, particularly their low battery life and the need for miniaturization to be able to implant the animals and monitor them over a time that is long enough to be physiologically relevant. This paper studied the possibility of reducing the thermal drift of implantable sensors. To quantify and compensate for the thermal drift, we developed the equivalent model of the piezoresistive probe by using the Cadence software. Our model takes into account the temperature (34–39 °C) as well as the pressure (0–300 mmHg). We were thus able to identify the source of the drift and thanks to our model, we were able to compensate for it thanks to the compensation circuits added to the conditioning circuits of the sensor. The maximum relative drift of the sensor is (0.1 mV/°C)/3.6 mV (2.7%), a drift of the conditioning circuit is (0.98 mV/°C)/916 mV (0.1%) and the whole is (13.4 mV/°C)/420 mV (32%). The compensated sensor shows a relative maximum drift of (0.371 mV/°C)/405 mV (0.09%). The output voltage remains stable over the measurement temperature range.

Supplementary Materials

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

The data presented in this study are available on request from the corresponding author.
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MDPI and ACS Style

Mbacke, S.M.D.; El Gibari, M.; Lauzier, B.; Gautier, C.; Li, H. Implantable Blood Pressure Sensors with Analogic Thermal Drift Compensation. Eng. Proc. 2021, 6, 34. https://doi.org/10.3390/I3S2021Dresden-10126

AMA Style

Mbacke SMD, El Gibari M, Lauzier B, Gautier C, Li H. Implantable Blood Pressure Sensors with Analogic Thermal Drift Compensation. Engineering Proceedings. 2021; 6(1):34. https://doi.org/10.3390/I3S2021Dresden-10126

Chicago/Turabian Style

Mbacke, Serigne Modou Die, Mohammed El Gibari, Benjamin Lauzier, Chantal Gautier, and Hongwu Li. 2021. "Implantable Blood Pressure Sensors with Analogic Thermal Drift Compensation" Engineering Proceedings 6, no. 1: 34. https://doi.org/10.3390/I3S2021Dresden-10126

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