The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1993
Filed:
Jul. 18, 1991
Anton Mostl, Graz, AT;
Michael Mayer, Graz, AT;
AVL Medical Instruments AG, Schaffhausen, CH;
Abstract
A device for determining the concentration of at least one substance in organic tissue includes a subcutaneous needle for insertion into the tissue and a pumping and suction unit which is controlled by a microprocessor and is used for delivering a perfusion fluid and draining it after its partial equilibration with the tissue. The device further includes a sensing unit connected to the microprocessor for determining the concentration of the substance to be analyzed and one or more marker variables. The perfusion fluid, a calibrating solution and at least one drug are provided in replaceable metering ampoules sealed with membranes, whose metering plungers can be actuated by a drive unit controlled by the microprocessor. The metering ampoules communicate with a master capillary leading from the pumping and suction unit to the subcutaneous needle; communication is established via capillary tubes piercing the membranes.