# US 7,745,228 B2 · Device for simultaneously carrying out blood group determination, serum cross-check and antibody detection test > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,745,228 B2 - Document ID: US7745228B2 - Status: Granted - Kind: B2 - Application number: 10/563,681 - Filed: 2004-07-08 - Published: 2007-02-22 - Granted: 2010-06-29 - Earliest claimed: 2003-07-09 - Assignees: Medion Diagnostics AG - Inventors: Peter Schwind; Klemens Löster - Web page: https://patentgrep.com/patent/US7745228B2 ## CPC - G01N 33/80: involving blood groups or blood types {or red blood cells (white blood cells G01N33/56972)} - G01N 33/54389: {with bidirectional or multidirectional lateral flow, e.g. wherein the sample flows from a single, common sample application point into multiple strips, lanes or zones} - Y10S 435/97: Test strip or test slide - Y10S 436/808: Automated or kit - Y10S 436/81: Tube, bottle, or dipstick - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract This invention relates to a device for the simultaneous qualitative or quantitative determination of several analytes in a liquid sample. The device comprises a membrane with a charging zone, for the application of the liquid sample, at least two indicator zones which can interact with the analyte(s) and at least one absorption region, which accepts the fluid after passing through the indicator zones, whereby the indicator zones lie between the charging zone and an absorption region, characterized in that the flow directions (flow tracks) are essentially parallel from the application zone through each indicator zone to an absorption region and at least two different flow tracks are present. The invention further relates to a method for the determination of several analytes or derivatives thereof in a liquid sample, comprising: application of the sample to the charging zone of a membrane of the device, whereby said sample is present in sufficient amounts to permit the sample fluid to flow in the direction of the absorption region through the indicator zones and to permit the analytes or derivatives thereof in the liquid sample to form a complex in the indicator zone. ## Claims ### Claim 1 A device for the simultaneous and qualitative or quantitative determination of a plurality of analytes, wherein at least one of the plurality of analytes is a cellularly bonded analyte, in a liquid sample, the device comprising: a single membrane with an application zone for the application of the liquid sample, at least one group of at least two indicator zones, which are able to interact with the analytes, and at least one absorption region which takes up the liquid after having passed the indicator zones; wherein the indicator zones are located between the application zone and the absorption region; wherein the at least two indicator zones are positioned on the membrane substantially parallel and absent a physical divider between indicator zones, the at least two indicator zones comprise at least two types of indicator particles of which at least one type being erythrocytes; and wherein the at least two indicator zones comprise a first indicator zone containing a bonding element for binding the cellularly bound analyte and the at least two indicator zones comprise a second indicator zone containing a binding element for binding an analyte comprising an erythrocyte in the liquid sample, wherein the erythrocyte serves as both the indicator particle and the analyte. ### Claim 2 (depends on 1) The device according to claim 1, wherein the indicator zones are so arranged that the test liquids flow through not more than one indicator zone. ### Claim 3 (depends on 1) The device according to claim 1, wherein the indicator zones are arranged in a V-, W-, M-, N-shape or a linear row. ### Claim 4 (depends on 1) The device according to claim 1, wherein at least two rows of indicator zones are arranged in the flow direction, one behind the other and/or laterally staggered, and the indicator zones of each row are arranged in relation to one another with a gap there between so that the test liquid for any one flow track flows through not more than one indicator zone. ### Claim 5 (depends on 1) The device according to claim 1, wherein at least two rows of indicator zones are arranged in the flow direction one behind the other and/or side by side and the indicator zones of each row in relation to one another are arranged without a gap there between so that the test liquid for any one flow track passes through more than one indicator zone. ### Claim 6 (depends on 1) The device according to claim 1, wherein at least two groups of indicator zones are arranged which are disposed starting from the application zone in different flow directions. ### Claim 7 (depends on 1) The device according to claim 1, wherein the indicator zones comprise antibodies or antibody fragments or lectines, antigens or antigen epitopes, cells or cell fragments, or mixtures thereof. ### Claim 8 (depends on 1) The device according to claim 1, wherein the indicator zones comprise antibodies or antibody fragments against blood group antigens or antigen epitopes and membranes or cell fragments of blood groups A1, A2, B, O erythrocytes, or mixtures thereof. ### Claim 9 (depends on 1) The device according to claim 1, wherein the indicator zones comprise antibodies or antibody fragments against blood group antigens or antigen epitopes and synthetic peptides, recombinant antigens, antibodies or antibody fragments against infective markers, or mixtures thereof. ### Claim 10 (depends on 1) The device according to claim 1, wherein the indicator zones comprise antibodies or antibody fragments against blood group antigens or antigen epitopes and fragments of thrombocytes, lymphocytes, or mixtures thereof. ### Claim 11 (depends on 1) The device according to claim 1, wherein the membrane consists of polyethylene, nitrocellulose or nylon. ### Claim 12 (depends on 1) The device according to claim 1, wherein downstream of the application zone and upstream of the indicator zones at least one sealing element is provided on the membrane. ### Claim 13 (depends on 12) The device according to claim 12, wherein downstream of the sealing element and upstream of the indicator zones at least one conjugate pad is applied. ### Claim 14 (depends on 1) The device according to claim 1, wherein the components of the device have been applied onto a support layer for mechanical reinforcement. ### Claim 15 (depends on 1) The device according to claim 1, wherein the components of the device are integrated in a casing. ### Claim 16 (depends on 1) The device according to claim 1, comprising at least two groups of indicator zones and at least two absorption regions, wherein the application zone is positioned in the central region of the membrane.