Information storage and transmittal for medical diagnostic devices

• US 6,153,085 A
• Filed: 08/17/1998
• Issued: 11/28/2000
• Est. Priority Date: 08/17/1998
• Status: Expired due to Fees

• Current Assignee: Stat-Chem Inc.
• Original Assignee: Stat-Chem Inc.
• Inventors: Patko, Martin J., Burnam, Michael H.
• Primary Examiner(s): Warden, Jill
• Assistant Examiner(s): NOGUEROLA, ALEXANDER STEPHAN
• Application Number:
  US09/135,714
• Time in Patent Office: 834 Days
• Field of Search: 422/82.01, 422/82.03, 422/82.04, 204/406, 204/416, 204/412, 204/413, 204/417, 204/418, 205/775, 205/789, 702/22, 702/23
• US Class Current: 205/775
• CPC Class Codes: G01N 33/48785 Electrical and electronic details of measuring devices for physical analysis of liquid biological material not specific to a particular test method, e.g. user interface or power supply

Abstract

An electronic sensor is described that includes a sample receptacle and a data storage device. The data storage device is powered by a pair of half cells on the sensor. The half cells contain ion solutions that are also used to calibrate the sensor. As the sensor is placed within a sensor data reader, the data stored on the data storage device is transferred to the reader along with measurements of the voltage potential between the half cells. The reader thereafter calculates a calibration slope curve for the sensor. The calibration slope curve is then used to determine the exact ion concentration of any sample that is placed in the sample receptacle.

Claims

1. A sensor, comprising:

a sample receptacle;

a data storage device comprising a volatile or non-volatile electronic memory device wherein said data storage device stores data for calibrating the sensor and wherein the sensor comprises one or more electrical contacts adapted for data communication with a sensor data reader;

a plurality of half cells forming a battery for providing electrical power to the volatile or non-volatile electronic memory device; and

a conductive material disposed between the half cells such that removal of the conductive material disrupts the electrical power to the electronic memory device.

2. The sensor of claim 1, wherein the electronic memory device is volatile and data stored in the volatile memory device is lost upon removal of the conductive material.

3. The sensor of claim 1, wherein the conductive material is a conductive gel disposed in the sample receptacle.

4. A method of calibrating a sensor, wherein the sensor comprises a data storage device and a plurality of half cells, wherein one of the half cells comprises a precalibrant solution having an electrochemical potential, and wherein the sensor is adapted to receive a sample comprising one or more species to be detected, the method comprising:

obtaining data from the data storage device;

analyzing the data to determine a present efficiency of the sensor;

measuring the electrochemical potential of the precalibrant; and

determining a calibration slope based on the electrochemical potential and the present efficiency.

5. The method of claim 4, wherein the data storage device is an electronic memory device.

6. The method of claim 5, further comprising overwriting or erasing the data from the electronic memory device after the data has been transferred to a sensor data reader, thereby preventing a second retrieval of the data.

7. The method of claim 5, wherein the sensor further comprises a microprocessor and software code to conduct the calibrating of the sensor.

8. The method of claim 5, wherein the electronic memory device is a nonvolatile electronic memory device.

9. The method of claim 4, wherein the data storage device comprises a bar code.

10. The method of claim 9, further comprising removing or destroying the bar code after a transferring the data to a sensor data reader, thereby preventing a second retrieval of the data.

11. A method of quantifying the ion concentration of a sample in a sensor, the sensor comprising a data storage device, a precalibrant composition and a reference composition, the method comprising:

a) transferring data indicative of an ion concentration from the data storage device on the sensor to a sensor data reader;

b) determining a first electrical potential between the precalibrant composition and the reference composition;

c) calculating a calibration slope of electrical potentials and ion concentrations based on the first electrical potential and the data from the data storage device;

d) measuring a second electrical potential between the reference composition and the sample; and

e) quantifying the ion concentration of the sample based on the calibration slope and the second electrical potential.

12. The method of claim 11, wherein transferring data from the data storage device to the sensor data reader comprises transferring data from an electronic memory device to the sensor data reader.

13. The method of claim 12, further comprising the step of erasing the data stored on the electronic memory device after the data has been transferred to the sensor data reader.

14. The method of claim 12, wherein transferring data from the data storage device to the sensor data reader comprises transferring data from a bar code to the sensor data reader.

15. The method of claim 14, further comprising the step of destroying the bar code after the data has been transferred to a sensor data reader.