[Warning: The following story contains spoilers about Wednesday's episode of Criminal Minds. Read at your own risk.] That sound you hear is baby girls crying everywhere. After 11 years and (probably) 103 broken doors and 214 tackles, Shemar Moore exited Criminal Minds on Wednesday's episode.
A prothrombin time (PT) is a test used to help detect and diagnose a bleeding disorder or excessive clotting disorder; the international normalized ratio (INR) is calculated from a PT result and is used to monitor how well the blood-thinning medication (anticoagulant) warfarin (CoumadinÂ®) is working to prevent blood clots.
Now, the PT--or Prothrombin Time--is a different type of measure of coagulation that's usually used to determine how much Coumadin a person has in their system. And more often, we use the INR as the parameter, which is the second half of that test.