Sensor for use in liquid medicament delivery systems

A technology of delivery system and liquid medicine, which is applied to infusion pump equipment and liquid medicine delivery system. It can solve the problems of uncontrolled directional obstruction and other problems, so as to reduce the dead volume, reduce the overall cost and reduce the accuracy. Effect

Inactive Publication Date: 2013-03-06
F HOFFMANN LA ROCHE & CO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this goal may be hampered by the uncontrolled orientation of the microfluidic chamber in space during this first filling process due to the buoyancy forces acting on the air bubbles due to the gravitational field

Method used

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  • Sensor for use in liquid medicament delivery systems
  • Sensor for use in liquid medicament delivery systems
  • Sensor for use in liquid medicament delivery systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0061] exist figure 2 A first embodiment of a sensor device 6 according to the invention is described in a cross section through a microfluidic chamber 1 of a sensor device 6 according to the invention. The microfluidic chamber 1 comprises a bottom structure 11 and a top cover membrane 12 , which define an inner volume 14 of the chamber 1 . The chamber is fluidly connected to a fluid system (not shown). The cover film 12 is flexible and elastic.

[0062] During operation of the sensor device according to the invention as a pressure sensor, the inner volume 14 of the microfluidic chamber 1 is filled with liquid. The pressure difference Δp between the liquid in the inner volume 14 and the pressure of the external environment (e.g. atmospheric pressure) acts on the cover membrane 12 and projects the membrane 12' outwardly. When the pressure differential drops, the deformed and thus biased membrane returns towards the unloaded flat state. The amount of deformation of the ...

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PUM

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Abstract

A sensor device (6) for use in a liquid medicament delivery system has a micro-fluidic chamber (1) comprising a rigid bottom substrate (11) and a cover (12), and an optical detection system (5) that is arranged to emit one or more light beams (53a) toward the cover membrane (12) and to observe the one or more light beams (53b) reflected from the cover membrane (12). The optical detection system (5) is arranged on a side of the bottom substrate (11) opposite to the cover membrane (12).

Description

technical field [0001] The present invention relates to a sensor device for use in a liquid medicament delivery system having a microfluidic chamber and an optical detection system, an infusion pump device and a liquid medicament delivery system having such a sensor device, and the use of such a sensor device for a measurement fluid system The use of pressure and / or the presence of air bubbles. Background technique [0002] Devices for the automatic release of liquid medicaments are generally used for patients who have a continuous and varying need over the course of a day for a drug that may be administered by subcutaneous infusion. Specific applications are eg specific pain therapy and the treatment of diabetes. In these cases, computer-controlled infusion pump devices are used, which can be carried by the patient and contain a specific amount of liquid medication in a drug store. A drug library usually contains enough drugs for one or several days. Liquid medication is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/168A61M5/142A61M5/14A61M5/36
CPCA61M5/16831A61M2005/16868A61M2205/3306A61M5/36A61M5/16854G01N21/85A61M2005/14268A61M5/141A61M2205/3313A61M5/14244A61M2205/0244G01N21/55
Inventor J.吕恩贝格尔
Owner F HOFFMANN LA ROCHE & CO AG
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