Apparatus for measurment and control of the content of glucose, lactate or other metabolites in biological fluids
First Claim
1. 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 it 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 form 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 no electrical contact between the interface block (13) and the external calculation unit.
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Accused Products
Abstract
Measurement and communication transducers and electronic circuits and control programs of the internal microprocessor of glucose content measurement instruments for personal independent use aimed at improving the safety and flexibility of use and the measurement performances of instruments for the almost continual determination of glucose or other molecules in extracellular fluids.
488 Citations
28 Claims
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1. 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 it 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 form 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 no electrical contact between the interface block (13) and the external calculation unit.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
Specification