Test tape and analytical system
View Patent ↗A test tape for analyzing body fluids is provided comprising a flexible carrier tape and a plurality of test fields arranged spaced apart thereon for the detection of an analyte in the body fluid. The carrier tape is provided with indicator areas to register the distance and/or determine the position of the test tape or its components during tape transport.
1. Analytical system for analyzing body fluids comprising:
a flexible carrier tape,
a plurality of test fields arranged spaced apart on the carrier tape and adapted for the detection of an analyte in the body fluid,
the carrier tape further comprising indicator areas for contactless detection or registering of the position of the test tape, wherein each indicator area extends in the longitudal direction of the tape in a section of the tape between consecutive spaced apart test fields, the indicator areas having a portion thereof poositioned centrally relative to the side edges of the test tape, the indicator areas forming distance scales configured for detection of the distance traveled by the tape during transport of the tape in an analytical system; and
a position detection device configured to scan the indicator areas to determine distance traveled by the test tape during transport of the tape.
2. Test tape according to claim 1 , wherein sections of the carrier tape comprising the test fields contain no indicators.
3. Test tape according to claim 1 , wherein the indicator areas form an incremental position scale.
4. Test tape according to claim 1 , wherein the contactless position detection or registering comprises an electro-optical sensing configuration.
5. Test tape according to claim 1 , wherein the test tape is configured to bring successive test fields into an active position within an analytical system by position-controlled tape advancement.
6. Test tape according to claim 1 , wherein the indicator areas are formed by at least one raster strip comprising alternating optically distinguishable segments.
7. Test tape according to claim 6 , wherein the optically distinguishable segments comprise light and dark segments or transparent/translucent and opaque segments.
8. Test tape according to claim 6 , wherein the indicator areas comprise two parallel raster strips that are staggered relative to one another in the longitudinal direction.
9. Tape cassette for magazination of the test tape according to claim 1 , comprising a supply reel having a portion of the test tape having unused test fields, and a waste reel configured to receive a portion of the test tape having used test fields.
10. Analytical system comprising:
a test tape having distance scales and a plurality of spaced apart test fields for detecting an analyte in a sample of a body fluid, the distance scales being provided in sections of the tape between consecutive spaced apart test fields,
a tape transport device for positioning the test fields in an active position of the system, and
a position detection device comprising sensor means and configured to scan the distance scales on the test tape in order to measure the distance traveled by the tape during transport thereof, whereby the test fields can be accurately positioned in the active position based upon the measured distance.
11. Analytical system according to claim 10 , wherein the position detection device is further configured to detect the direction of movement and the distance travelled during tape transport directly from the test tape.
12. Analytical system according to claim 10 , wherein the position detection device is located a predetermined distance along the tape from a measuring unit that analyzes a sample applied to an active test field.
13. Analytical system according to claim 10 , wherein the sensor means is positioned at least one side of the test tape and is configured for contactless scanning of the indicator areas during tape transport.
14. Analytical system according to claim 13 , wherein the contactless scanning comprises an electro-optical sensing configuration.
15. Analytical system according to claim 10 , wherein the tape transport device comprises a drive control configured to transport the test tape into an active position, the drive control being operatively coupled to the position detection device.
16. Analytical system according to claim 15 , wherein the tape transport device further comprises a drive unit configured to be actuated in an opposite direction than a tape advancement direction, the opposite actuation occurring as a function of an output signal of the position detection device.