system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Prothombin 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?
assistant
The correct answer is  The INR calculation has become a standard method for monitoring the PT values. It is calculated as = (patient prothrombin time/mean prothrombin time)ISI. Patient prothrombin time = 26 Mean prothrombin time = 13 ISI (International Sensitivity Index) = 1.41 INR = (26/13)1.41 Ref: Laboratory Hematology Practice By Kandice Kottke-Marchant, Bruce Davis, Page 424; Goodman and Gilman's The Pharmacological Basis of Therapeutics, 11th Edition, Page 1479; Physician Assistant's Clinical Companion By Springhouse, Pages 89-91