Patent ID: 6618603
Filing Date: 2003-09-09
Classification: A61B

Abstract:
An apparatus for the near-continual measurement of the quantity of analytes found in an interstitial biological fluid, comprising a hydraulic circulation system (1) capable of taking a solution from a tank (2) and sending the solution through a capillary tube (14) into a subcutaneous area of a patient, from where an appropriately filtered sample of interstitial fluid is taken through a capillary tube (15) and sent to a block (4) provided with a measurement cell for measuring the glucose level and, after measurement, the sample is sent to a discharge (3);in which an analog voltage signal corresponding to the measurement performed is sent from the block (4) to an analog-digital conversion block (5) from where the signal is again sent in digital for to a data memory (12) of a microprocessor control unit provided with an alarm management system (6) and an output interface block (13), which includes a block (17) for bidirectional transmission between the interface block (13) and an external calculation unit of the digital signal, such that there is not electrical contact between the interface block (13) and the external calculation unit.