ELECTRODE LAYOUT FOR BLOOD TEST SENSOR STRIP
First Claim
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1. An elongated sensor strip for use in a blood sample test device, comprising:
- a plurality of test sites arranged in series in a travel direction on the strip, wherein each test site includes a lancet hole, electrodes for determining a blood sample volume, and test electrodes for determining a blood sample characteristic;
each test site comprisinga non conductive substrate layer;
a conductive layer on the substrate layer forming conductive pads defined by non-conductive lines and aligned with device contacts in the blood sample test device and; and
a non-conductive layer superposed on the conductive layer having a window exposing a plurality of the conductive pads.
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Abstract
An improved electrode layout for a continuous strip sensor is provided which reduces misalignment of the electrodes with the contacts which read the position of the strip. Better contact with the electrodes reduces or eliminates transient signals between stop positions of the sensor strip.
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Citations
27 Claims
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1. An elongated sensor strip for use in a blood sample test device, comprising:
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a plurality of test sites arranged in series in a travel direction on the strip, wherein each test site includes a lancet hole, electrodes for determining a blood sample volume, and test electrodes for determining a blood sample characteristic;
each test site comprisinga non conductive substrate layer; a conductive layer on the substrate layer forming conductive pads defined by non-conductive lines and aligned with device contacts in the blood sample test device and; and a non-conductive layer superposed on the conductive layer having a window exposing a plurality of the conductive pads. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A blood sample acquisition and sensing system, comprising:
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device contacts; an elongated strip having a plurality of test sites arranged in series in a travel direction on the strip, wherein each test site includes a lancet hole, electrodes for determining a blood sample volume, test electrodes for determining a blood sample characteristic, and columns of conductive pads aligned with the device contacts for making electrical contact between the strip and the device contacts; a lancet and lancet injector; a motor adapted to advance the strip; and a processor adapted to receive signals produced when the device contacts make electrical contact with the conductive pads on the strip and adapted to communicate with the lancet injector to perform a lancing operation, the motor to perform a strip advance operation, and the test electrodes to perform a blood sample characteristic measurement operation. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for performing a plurality of blood sample acquisition and testing procedures on a strip, comprising the steps of:
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providing an elongated strip having a plurality of test sites arranged in series in a travel direction on the strip, wherein each test site includes a lancet hole, electrodes for determining a blood sample volume, test electrodes for determining a blood sample characteristic, and conductive pads for making electrical contact with a blood test sensor device; injecting a lancet through the lancet hole at a first test site into a subject to obtain a blood sample contacting the strip; contacting the blood sample with the electrodes for determining a blood sample volume to produce a signal when a blood sample volume is detected; advancing the strip responsive to the signal produced when a blood sample is detected; contacting the blood sample with the test electrodes to obtain a blood sample characteristic signal; and advancing the strip to a second test site. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification