<prompt> Prothrombin time PT of a patient is 26, control PT is 13 seconds and sensitivity index is 1.41. What will be the INR of this patient -26132613 x 1.41BothNone  <response>: Ans. is d None o A standardized system called the International Normalized Ratio INR, which is the ratio of prothrombin time in patient to that in normal non-anticoagulated person, has been developed by WHO and it is based on the use of human brain thromboplastin. 