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Proceedings Paper

High precision innovative micropump for artificial pancreas
Author(s): E. Chappel; S. Mefti; G.-L. Lettieri; S. Proennecke; C. Conan
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Paper Abstract

The concept of artificial pancreas, which comprises an insulin pump, a continuous glucose meter and a control algorithm, is a major step forward in managing patient with type 1 diabetes mellitus. The stability of the control algorithm is based on short-term precision micropump to deliver rapid-acting insulin and to specific integrated sensors able to monitor any failure leading to a loss of accuracy. Debiotech’s MEMS micropump, based on the membrane pump principle, is made of a stack of 3 silicon wafers. The pumping chamber comprises a pillar check-valve at the inlet, a pumping membrane which is actuated against stop limiters by a piezo cantilever, an anti-free-flow outlet valve and a pressure sensor. The micropump inlet is tightly connected to the insulin reservoir while the outlet is in direct communication with the patient skin via a cannula. To meet the requirement of a pump dedicated to closed-loop application for diabetes care, in addition to the well-controlled displacement of the pumping membrane, the high precision of the micropump is based on specific actuation profiles that balance effect of pump elasticity in low-consumption push-pull mode.

Paper Details

Date Published: 6 March 2014
PDF: 12 pages
Proc. SPIE 8976, Microfluidics, BioMEMS, and Medical Microsystems XII, 89761C (6 March 2014); doi: 10.1117/12.2036068
Show Author Affiliations
E. Chappel, Debiotech SA (Switzerland)
S. Mefti, Debiotech SA (Switzerland)
G.-L. Lettieri, Debiotech SA (Switzerland)
S. Proennecke, Debiotech SA (Switzerland)
C. Conan, Debiotech SA (Switzerland)


Published in SPIE Proceedings Vol. 8976:
Microfluidics, BioMEMS, and Medical Microsystems XII
Bonnie L. Gray; Holger Becker, Editor(s)

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