Dispensing instrument for fluid monitoring sensors

• US 5,854,074 A
• Filed: 01/17/1997
• Issued: 12/29/1998
• Est. Priority Date: 03/14/1995
• Status: Expired due to Term

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Bayer Corporation (Bayer AG)
• Inventors: Charlton, Steven C., Slomski, Dennis, Wogoman, Frank W., Schumann, Matthew A., Miller, Anne T., Moulton, Joseph L.
• Primary Examiner(s): Le, Long V.
• Application Number:
  US08/785,185
• Time in Patent Office: 711 Days
• Field of Search: 422/55, 422/58, 422/63, 422/64, 422/65, 422/66, 422/99, 422/104, 436/43, 436/44, 436/46, 436/164, 436/805, 436/810, 435/805, 435/808, 221/31, 221/87, 221/88, 221/268, 206/828
• US Class Current: 436/46
• CPC Class Codes: B01L 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: G01N 2035/00089 Magazines
• CPC Class Codes: G01N 33/4875 Details of handling test elements, e.g. dispensing or storage, not specific to a particular test method test-elements per se B01L, automatic analysers G01N35/00, in-vivo analysis on the human body for medical diagnosis A61B
• CPC Class Codes: Y10T 436/11 Automated chemical analysis
• CPC Class Codes: Y10T 436/110833 Utilizing a moving indicator strip or tape
• CPC Class Codes: Y10T 436/112499 with sample on test slide

Abstract

A sensor dispensing instrument is adapted to receive a generally circular sensor pack containing a plurality of blood glucose sensors. Each of the sensors are disposed in sensor cavities, each of which is in fluid communication with a corresponding desiccant cavity and has a support wall that assists in directing the sensor as its being ejected from the cavity. The sensor pack is loaded on an indexing disk in the instrument such that when a slide actuator on the instrument is moved toward a testing position, a feed mechanism engaged by the slide actuator moves a knife blade thereon toward one of the sensor cavities. The knife blade pierces a portion of a foil covering the sensor cavity and engages the sensor disposed in the cavity to thereby eject the sensor from the sensor cavity. The continued sliding of the slide actuator toward its testing position results in the sensor being completely ejected from the sensor cavity and disposed in a testing position with a testing end of the sensor projecting from the instrument. Once the blood analyzing test is completed, the slide actuator is moved in the opposite direction towards its standby position. As the slide actuator is moved away from its testing position, the indexing disk with the sensor pack thereon is rotated so that the next one of sensor cavities is positioned so that the sensor therein can be used for the next blood glucose test that is to be performed. The instrument includes circuitry to obtain test data from the sensor pack and to display testing data.

Claims

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

installing a sensor pack on an indexing mechanism disposed in a housing of a sensor dispensing instrument such that one of a plurality of sensor retainers that is enclosed by an enclosure and that accommodates one of said plurality of fluid sensors is in a feed position;

actuating a feed actuator from an actuator standby position, said feed actuator being associated with said indexing mechanism and is adapted to advance a driver that is pivotable with respect to said sensor pack, said driver piercing a portion of said enclosure and engaging said sensor disposed within said sensor retainer so that said sensor in said sensor retainer is advanced out of said sensor retainer into a testing position as said feed actuator is advancing from said actuator standby position; and

returning said feed actuator to said actuator standby position so as to return said driver to a driver standby position, said driver being pivoted away from said sensor pack as said feed actuator is so returned to said actuator standby position and said indexing mechanism being simultaneously advanced as said actuator is being returned to said actuator standby position such that another one of said plurality of sensor retainers is moved into said feed position as said feed actuator is being returned to said actuator standby position.

2. A method of handling a plurality of fluid sensors as set forth in claim 1 wherein said sensor pack includes a base portion in which said sensor retainers are formed, wherein said enclosure is a foil that is heat sealed on said base portion about an outer peripheral edge of said base portion and about each of said sensor retainers to seal said sensor retainers with said sensors therein, and wherein each of said sensor retainers includes a sensor cavity having a support wall on which said sensor is disposed that extends in a radial direction from adjacent the peripheral edge of said base portion toward a center of said base portion, said support wall having a sloped portion that is sloped toward said foil in a direction toward said peripheral edge of said base portion, said method further including advancing said sensor along said sloped portion of said support wall of said sensor retainer as said sensor is forced through said foil and out of said sensor retainer so that said sensor avoids said heat seal of said foil to said base portion.