Abstract:
The invention discloses a disposable cartridge for preparing a sample fluid containing cells for analysis. The cartridge comprises one or more parallel preparation units, each preparation unit comprises one or more chambers enclosed between seals and connected in series. Each chamber is configured for receiving an input fluid, performing a procedure affecting the fluid thereby generating an output fluid, and releasing the output fluid. A first chamber of the one or more chambers is a pressable chamber coupled to a first opening, while a last chamber of the one or more chambers is coupled to a second opening. The input fluid of the first chamber is the sample fluid. The one or more preparation units are coupleable to a compartment for performing analysis of the respective output fluids convey able via the second openings.
Abstract:
To provide a more convenient and more accurate method of assaying ProGRP by improving the stability of ProGRP which is known to be unstable in a biological sample.By using a blood sample in a condition in which a blood coagulation factor is not activated is used as a sample, the degradation of ProGRP is suppressed, whereby it is possible to store a sample for a long period of time and to improve the accuracy of an assay.
Abstract:
The present invention provides a novel assay for detecting human antibodies specific for a platelet factor 4 (PF4)/heparin complex in a fluid sample. The assay utilizes an immobilized PF4/polyanion complex and an anti-human antibody conjugated to a non-particulate fluorescent dye to capture and detect human PF4/heparin antibodies. Various devices, methods and systems based on the disclosed PF4/heparin assay are also provided.
Abstract:
The present invention relates to medicine, and specifically to hematology, and can be used in particular for diagnostic and research purposes when determining coagulation characteristics of blood and its components, and also in biotechnology and fundamental biological research.One of the aspects of the present invention is a polypeptide for inhibition of contact activation in a sample of blood or its product to be tested, which comprises the sequence of an infestin-4 mutant MutB (SEQ ID NO: 1) and which substantially corresponds thereto, where said sequence can have modifications outside the area of the inhibitory loop which significantly maintain the activity of the said polypeptide, which acts as a high-selectivity fXIIa inhibitor, the selectivity of which is higher than that of native infestin-4 and Mut15, or the activity of which is higher than that of native infestin-4 and Mut15.Another aspect of the invention is the use of the said polypeptide to study the coagulation in the test sample of blood or its product, including at least one of the following steps, and preferably all of the following steps: obtaining a sample, bringing it into contact with the said polypeptide, and incubating the resulting mixture, bringing a blood coagulation activator into contact with the sample containing the said polypeptide, and measuring the coagulation parameters of the sample.Yet another aspect of the invention is the use of a polypeptide comprising the sequence of an infestin-4 mutant MutB as an anticoagulant which blocks contact activation by means of bringing s sample into contact with the said polypeptide for collection purposes and in order to increase the storage time of the sample.
Abstract:
A method and system for automatic in-vitro diagnostic analysis are described. The method comprises adding a first reagent type and a second reagent type to a first test liquid during a first and second cycle times respectively. The addition of the first reagent type to the first test liquid comprises parallel addition of a second reagent type to a second test liquid during the first cycle time. The addition of the second reagent type to the first test liquid comprises parallel addition of a first reagent type to a third test liquid during the second cycle time, respectively.
Abstract:
The present technology relates generally to fluidics devices for measuring platelet coagulation and associated systems and methods. In some embodiments, a fluidics device includes an array of microstructures including pairs of generally rigid blocks and generally flexible posts. The fluidics device further includes at least one fluid channel configured to accept the array. The fluidics device can further include a measuring element configured to measure a degree of deflection of one or more of the flexible posts in the array. In some embodiments, the fluidics device comprises a handheld device and usable for point of care testing of platelet forces and coagulation.
Abstract:
Provided herein are kits, devices and methods related to blood analysis. In some aspects, kits, devices and methods related to analyzing unprocessed and processed blood are provided, e.g., by processing blood with enzymes and measuring transmittance of light passed through the processed blood and as well as through unprocessed blood. Such kits, devices and methods are useful, e.g., for identifying the presence or absence of infection, and also the type of infection, if present.
Abstract:
The present invention concerns diagnostic methods for coagulation testing involving determining anticoagulant activity elicited by a first anticoagulant in a sample comprising measuring a first Factor Xa activity in a body fluid test sample of said subject, measuring a second Factor Xa activity in at least one calibrator sample comprising a predefined anticoagulation activity for a second anticoagulant, calculating an universal parameter for the anticoagulation activity comprised in the test sample based on the first and the second measured Factor Xa activities and comparing the said parameter for the anticoagulation activity with predefined ranges of expected anticoagulation activity for at least three anticoagulants. Further provided is a computer program code assisting the method as well as a system for carrying out the said method as well as a kit.
Abstract:
The present invention is directed to a novel method of determining inhibitors of proteolytically active coagulation factors, referred to herein as anticoagulants, in a sample, in particular the qualitative detection of direct thrombin and factor Xa inhibitors in a sample. The method of the present invention allows a qualitative determination of the nature anticoagulants present in a sample. This can be achieved with only one coagulation-based test. The method can be used in a test kit, including a point-of-care system.
Abstract:
To provide a more convenient and more accurate method of assaying ProGRP by improving the stability of ProGRP which is known to be unstable in a biological sample. By using a blood sample in a condition in which a blood coagulation factor is not activated is used as a sample, the degradation of ProGRP is suppressed, whereby it is possible to store a sample for a long period of time and to improve the accuracy of an assay.