Method and apparatus of handling multiple sensors in a glucose monitoring instrument system

• US 5,510,266 A
• Filed: 05/05/1995
• Issued: 04/23/1996
• Est. Priority Date: 05/05/1995
• Status: Expired due to Term

• Current Assignee: Bayer Corporation (Bayer AG)
• Original Assignee: Bayer Corporation (Bayer AG)
• Inventors: Desimone, Joseph P., Bonner, Lydia M., Micinski, Russell J.
• Primary Examiner(s): Warden, Jill
• Assistant Examiner(s): Le, Long V.
• Application Number:
  US08/435,201
• Time in Patent Office: 354 Days
• Field of Search: 436/43, 436/46, 422/55, 422/58, 422/61, 422/63, 422/68.1, 422/99, 422/102, 422/104, 221/87, 221/88, 221/268
• US Class Current: 436/43
• CPC Class Codes: B01L 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: G01N 33/48757 Test elements dispensed from a stack
• CPC Class Codes: Y10T 436/11 Automated chemical analysis
• CPC Class Codes: Y10T 436/112499 with sample on test slide

Abstract

A sensor dispensing instrument includes a sensor magazine that contains a plurality of blood glucose sensors disposed in sensor slots. Each of the sensor slots is in fluid communication with a desiccant cavity in which desiccant material is disposed. The front and rear walls of the sensor magazine are sealed with burst foils so as to seal the sensor slots and the desiccant cavities. The sensor instrument has an outer housing with a laterally extending magazine opening adapted to receive the sensor magazine. A pivot rod is moved through the magazine and an indexing wheel into an operating position with a detent arm on the instrument housing engaging a detent groove on the magazine to position the magazine in a sensor feeding position. Once so positioned, a sensor push rod is pushed forward resulting in the push rod piercing the rear burst foil and engaging a sensor in one of the sensor slots to thereby push the sensor out through the front burst foil and into a testing position. Once a test is completed, the push rod is advanced forward further to thereby eject the used sensor from the sensor handling instrument. The push rod then is retracted to a standby position. As the push rod is being retracted, a pin associated with the push rod causes the indexing wheel to rotate so that the pivot rod is rotated until the detent arm engages another detent groove so that another sensor slot is in alignment with the push rod.

Claims

1. A sensor dispensing instrument for handling of a plurality of fluid sensors comprising:

a housing having a magazine opening;

a sensor magazine adapted to be disposed in said magazine opening, said sensor magazine having a plurality of sensor slots each of which sensor slots is adapted to accommodate one of said plurality of fluid sensors;

a feed means;

a pivot means engageable with said sensor magazine when said sensor magazine is disposed in said magazine opening for turning said sensor magazine so that one of said plurality of sensor slots is in alignment with said feed means;

indexing means associated with said pivot means to turn said pivot means as said indexing means turns; and

feed actuator means connected to said feed means for advancing said feed means through said sensor slot in alignment with said feed means so that said sensor in said sensor slot is placed into a testing position, wherein a portion of one end of said sensor protrudes from said instrument for further advancing said feed means so that said sensor is ejected from said instrument, and for returning said feed means to a standby position, said feed actuator means being operatively associated with said indexing means to turn said indexing means as said feed actuator means returns said feed means to said standby position to thereby turn said sensor magazine so that another of said plurality of sensor slots is in alignment with said feed means.

2. A sensor dispensing instrument as set forth in claim 1 wherein said sensor magazine is a right cylinder having a plurality of detent means along its outer periphery, each of said detent means corresponding to one of said plurality of sensor slots.

3. A sensor dispensing instrument as set forth in claim 2 wherein said detent means and said sensor slots are equally spaced on said sensor magazine.

4. A sensor dispensing instrument as set forth in claim 2 including a detent arm means projecting into said magazine opening, one of said plurality of sensor slots being in alignment with said feed means when said detent arm means is disposed in one of said plurality of detent means.

5. A sensor dispensing instrument as set forth in claim 1 wherein said sensor magazine includes a plurality of desiccant cavities, each of which desiccant cavities is in fluid communication with one of said plurality of sensor slots.

6. A sensor dispensing instrument as set forth in claim 5 including desiccant material in each of said plurality of desiccant cavities so that each of said plurality of sensor slots is maintained in a desiccate state.

7. A sensor dispensing instrument as set forth in claim 5 wherein said sensor magazine includes first and second walls with each of said plurality of desiccant cavities extending from said first wall toward said second wall and including first foil means covering said first wall such that said plurality of desiccant cavities are sealed by said first foil means.

8. A sensor dispensing instrument as set forth in claim 1 wherein said sensor magazine includes first and second walls with each of said plurality of sensor slots extending from said first wall to said second wall and including first foil means covering said first wall and a second foil means covering said second wall such that said plurality of sensor slots are sealed between said first and second foil means.

9. A sensor dispensing instrument as set forth in claim 8 wherein as said feed means is being advanced by said feed actuator means said feed means pierces said first foil means, enters into said sensor slot in alignment with said feed means and engages said sensor in said sensor slot forcing said sensor to pierce through said second foil means into said testing position.

10. A sensor dispensing instrument as set forth in claim 9 wherein each of said plurality of sensors includes a chamfered testing end that is adapted to pierce said second foil means and that is adapted to be placed in fluid to be tested.

11. A sensor dispensing instrument as set forth in claim 1 wherein said pivot means has a first position in engagement with said sensor magazine so that as said pivot means is rotated said sensor magazine is rotated and a second position retracted away from said magazine opening so that said sensor magazine can be inserted into or removed from said magazine opening.

12. A sensor dispensing instrument as set forth in claim 1 wherein said indexing means has a plurality of first grooves extending along a longitudinal axis of said indexing means and a plurality of second grooves disposed at an angle with respect to said first grooves and said feed actuator means has a pin that travels in one of said first grooves as said feed means is moved toward said sensor slot and travels in one of said second grooves as said feed means is returned to its standby position such that said indexing means is rotated as said pin travels in one of said second grooves.

13. A sensor dispensing instrument as set forth in claim 12 wherein each of said second grooves extend in an outer periphery of said indexing means from one of said plurality of first grooves to the next adjacent one of said plurality of first grooves,

14. A sensor dispensing instrument as set forth in claim 13 including first step means between adjacent first and second grooves preventing said pin from traveling in said second grooves when said feed actuator means is advanced towards said sensor magazine and second step means between adjacent first and second grooves preventing said pin from traveling in said first grooves when said feed actuator means is being returned to said standby position.

15. A method of handling a plurality of fluid sensors comprising:

installing a sensor magazine into a magazine opening in a housing of a sensor dispensing instrument, said sensor magazine having a plurality of sensor slots, each of which sensor slots is adapted to accommodate one of said plurality of fluid sensors;

positioning said sensor magazine so that one of said plurality of sensor slots is in alignment with a feed means;

actuating a feed actuator means to advance said feed means through said sensor slot in alignment with said feed means so that said sensor in said sensor slot is placed into a testing position wherein a portion of one end of said sensor protrudes from said instrument;

further actuating said feed actuator means so that said feed means is further advanced to eject said sensor from said instrument;

returning said feed actuator means to a standby position so as to return said feed means to a standby position with said feed actuator means causing an indexing wheel in said housing to be rotated as said feed means is returned to said standby position to thereby rotate said sensor magazine so that another one of said plurality of sensor slots is placed in alignment with said feed means.

16. A method of handling a plurality of fluid sensors as set forth in claim 15 wherein said sensor magazine includes first and second walls with each of said plurality of sensor slots extending from said first wall to said second wall and including first foil means covering said first wall and a second foil means covering said second wall such that said plurality of sensor slots are sealed between said first and second foil means and wherein said feed means pierces said first foil as said feed means is advanced into said sensor slot and said sensor pierces said second foil as said feed means advances said sensor into said testing position.

17. A method of handling a plurality of fluid sensors as set forth in claim 15 wherein said indexing wheel has a plurality of first grooves extending along a longitudinal axis of said indexing wheel and a plurality of second grooves disposed at an angle with respect to said first grooves and said feed actuator means has a pin that travels in one of said first grooves as said feed means is moved toward said sensor slot and travels in one of said second grooves as said feed means is returned to its standby position such that said indexing wheel is rotated as said pin travels in one of said second grooves.

18. A method of handling a plurality of fluid sensors as set forth in claim 17 wherein each of said second grooves extends in an outer periphery of said indexing wheel from one of said plurality of first grooves to the next adjacent one of said plurality of first grooves.