INR analysis
It is an analysis to measure the external factors of blood clotting (I, II, V and VII, plus factor X), to be used to determine blood tendencies for clotting and, based on the outcome of the analysis, to identify, determine and measure the dose of drugs that prevent clotting, , In warfarin, and vitamin K cases.
How to measure the INR analysis
- The time of prothrombin is measured by the use of blood plasma, by drawing a blood sample from the vein by a tube with a quantity of liquid jackets, which performs an anticoagulant action when combined with calcium in the blood sample, then the doctor tower the sample and presents it to the force of expulsion Central to the separation of blood cells and plasma, and in the cases of the newborn child using a blood sample of capillary blood vessels.
- The plasma is analyzed through the biomedical world using a machine to set the temperature to 37 degrees. The sample is placed in the plasma. Calcium is added to the blood to clot again. In order to obtain the exact scale, the blood level must be constant with citrate; Many laboratories refuse to perform the analysis if the tube is not filled to the specified extent because it may contain a high concentration of citrate if it is filled more or less than the specified.
- In order to measure the time of the prothrombin, the sample is placed in a tube with a blue cover, and the third factor is added to the tissue factor. The time taken for the sample is calculated until it clots visually. Some laboratories use the mechanical methods to measure the ratio. The prothrombin ratio of a patient is equal to the prothrombin time of plasma On the prothrombin time of a standard plasma sample.
- The time of prothrombin is the same as the time taken for plasma in clot after the addition of the histological factor, which is obtained from animals. It measures the quality of the external factors and the co-factors of the coagulation. The speed of the external factors is affected by the seventh factor of the thrombosis, In order to make it, vitamin K is essential. Prothrombin can be prolonged in the case of vitamin K deficiency, due to the use of warfarin or liver disease and food absorption, all prolonging the time of prothrombin.