RU2002115714A - An electrochemical cell, device, system and method for sampling a biological fluid and examining an analyte contained therein - Google Patents

Claims (10)

1. An electrochemical cell for use in sampling a biological fluid and examining an analyte contained therein, comprising a first electrode and a second electrode located concentrically inside the first electrode and spaced from it and containing a distal end configured to pierce the skin surface. 2. The electrochemical cell according to claim 1, wherein the first electrode has a continuous wall configuration having an open distal end and a distal edge. 3. The electrochemical cell according to claim 2, in which the continuous wall has a cylindrical configuration, and the distal edge forms a surface that comes into contact with the skin. 4. The electrochemical cell according to claim 1, in which the second electrode has an elongated configuration having a segment coaxial with the first electrode. 5. The electrochemical cell according to claim 1, further comprising an insulator located at least in part of the space between the first and second electrodes. 6. The electrochemical cell according to claim 2, in which the space between the electrodes has a thickness sufficient to apply a surface tension force to the liquid present at the open distal end of the first electrode. 7. A device for sampling a biological fluid and examining a given component in a biological fluid, comprising an inner electrode having a proximal end, a distal end and a length segment between them, an outer electrode having a cylindrical configuration containing a proximal end, an open distal end, and a cavity, coaxially spaced from the inner electrode, an insulating material coaxially placed between the portions of the proximal ends of the inner and outer electrodes, and an element piercing the skin, departing from the distal end internal electrode. 8. A system for sampling biological fluid from the skin of a patient and examining a predetermined component in a biological fluid, comprising an electrochemical cell comprising a first electrode and a second electrode spaced apart from each other, in which the first electrode is concentrically arranged around the second electrode, and the second electrode contains a distal an end configured to pierce the surface of the skin, and a control unit having an electrical connection with an electrochemical cell, comprising means for supplying electrically th reference signal to the first electrode and for receiving an electrical output signal from the second electrode, and a software-implemented algorithm that automatically calculates and determines the concentration of a given component in a biological sample when receiving an electrical output signal. 9. The system of claim 8, containing a set of electrochemical elements. 10. A method for examining a biological fluid contained in a patient’s skin and determining a concentration of a predetermined component contained therein, comprising the manufacture of an electrochemical cell comprising concentrically spaced inner and outer electrodes, the inner electrode comprising a piercing element, the piercing element into the skin at a selected depth, at which the biological fluid comes out of the skin, the biological fluid sample is transferred to the electrochemical cell, the first elec a tric signal to the electrochemical cell, and a second electrical signal generated by the electrochemical cell is received, the second electrical signal representing the concentration of the component in the sample.