The precision of gastric motility and volume sensing by implanted magnetic sensors

J. Tomek; P. Mlejnek; V. Janásek; P. Ripka; P. Kašpar; J. Chen

doi:10.1016/j.sna.2007.04.020

The precision of gastric motility and volume sensing by implanted magnetic sensors

J. Tomek, P. Mlejnek, V. Janásek, P. Ripka, P. Kašpar, J. Chen

School of Medicine

Research output: Contribution to journal › Article › peer-review

Abstract

Information about size and movement of stomach has to be acquired for medical research and for reliable control of the implantable active gastric electrical stimulation device. Standard methods were not applicable, thus a simple two-coil AC measuring system has been designed and also successfully tested in vivo with coils stitched to stomach wall of laboratory animals. The achieved measurement range was 10-120 mm with 5% accuracy and 1 mm resolution. In order to suppress significantly the directional dependence of the system, we have built three-axial sensor. The resulting error in distance estimation caused by angular misalignment is below 10% for transmitter coil rotation up to 45°.

Original language	English (US)
Pages (from-to)	34-39
Number of pages	6
Journal	Sensors and Actuators, A: Physical
Volume	142
Issue number	1
DOIs	https://doi.org/10.1016/j.sna.2007.04.020
State	Published - Mar 10 2008

Keywords

Distance sensors
Gastric electrical stimulation
Magnetic measurements

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering

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10.1016/j.sna.2007.04.020

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title = "The precision of gastric motility and volume sensing by implanted magnetic sensors",

abstract = "Information about size and movement of stomach has to be acquired for medical research and for reliable control of the implantable active gastric electrical stimulation device. Standard methods were not applicable, thus a simple two-coil AC measuring system has been designed and also successfully tested in vivo with coils stitched to stomach wall of laboratory animals. The achieved measurement range was 10-120 mm with 5% accuracy and 1 mm resolution. In order to suppress significantly the directional dependence of the system, we have built three-axial sensor. The resulting error in distance estimation caused by angular misalignment is below 10% for transmitter coil rotation up to 45°.",

keywords = "Distance sensors, Gastric electrical stimulation, Magnetic measurements",

author = "J. Tomek and P. Mlejnek and V. Jan{\'a}sek and P. Ripka and P. Ka{\v s}par and J. Chen",

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AU - Janásek, V.

AU - Ripka, P.

AU - Kašpar, P.

AU - Chen, J.

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