Test element analysis system
View Patent ↗This invention relates to test element analysis system for the analytical investigation of body liquids. An evaluation instrument, pertaining to the system, comprises a storage container, where a plurality of test elements is held ready for use, a sample application position, where one test element at a time is brought into contact with the sample, a measuring device for the determination of a measurable variable characteristic for the analysis, and a transport device, by which one test element at a time is taken out of the test element storage container at the take out position and transported to the sample application position.
1. Test element analysis system for the analytical investigation of liquid samples, comprising:
test elements with a test field, which for performing an analysis is brought into contact with the sample, the reaction of an analyte contained in the sample with at least one reagent contained in the test element leading to a change of a measurable variable which is characteristic for the analysis, and
a test element storage container, where a plurality of test elements are stored to be taken out of the storage container at a take out position, and
an evaluation instrument with a test element gripping device and a measuring device, the gripping device provided for positioning a test element in a sample application position, such that its test field is brought into contact with the sample, the measuring device being for measuring a change of a measurable variable which is characteristic for the analysis,
wherein
the test elements comprise a frame at least partially surrounding the substantially planar test field and including an outwardly oriented gripping rim running around the outer perimeter of the test elements, the frame having a diameter that increases from the gripping rim in both spatial directions running perpendicular to the test field plane, the gripping device, during the taking out from the storage container, holds a test element at its gripping rim.
2. Test element analysis system according to claim 1 , wherein the gripping device is a part of the evaluation instrument, and wherein the test element is taken over directly from the take out position of the storage container to the evaluation unit.
3. Test element analysis system according to claim 1 , the gripping device comprises a plurality of gripping arms, which are during the holding of the test element in at least point contact with the gripping rim of the test element.
4. Test element analysis system according to claim 3 , wherein the arms of the gripping device are elastically moveable in such a manner that due to this elasticity they can be pushed onto the test element for holding thereof.
5. Test element analysis system according to claim 4 , wherein the arms of the gripping device are part of a gripping element, which is made of a single piece of an elastically deformable material.
6. Test element analysis system according to claim 1 , wherein the test element storage container comprises a magazine where the test elements are stored in a stack one upon the other.
7. Test element analysis system according to claim 2 , wherein the gripping device is embodied as a gripping fork with two gripping arms, and wherein the test element is held, by means of gripping sections of the arms of the gripping fork, the gripping sections running parallel to the test field plane and being in at least point contact with the gripping rim.
8. Test element analysis system according to claim 7 , wherein the distance between the arms of the gripping fork decreases towards a front end of the gripping section.
9. Test element analysis system according to claim 7 , wherein the system is embodied in such a manner that one test element at a time is taken out from the test element storage container by means of a one-dimensional translatory motion of the gripping fork.
10. Test element analysis system according to claim 7 , wherein the system is embodied in such a manner that the test element is transported, during at least a part of the transport path between the take out position and the sample application position, by means of a swiveling movement of the gripping fork around a fixed axis which runs vertical to the test field plane.