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  2. Prothrombin time - Wikipedia

    en.wikipedia.org/wiki/Prothrombin_time

    The prothrombin time ratio is the ratio of a subject's measured prothrombin time (in seconds) to the normal laboratory reference PT. The PT ratio varies depending on the specific reagents used, and has been replaced by the INR. [3] Elevated INR may be useful as a rapid and inexpensive diagnostic of infection in people with COVID-19. [4]

  3. Warfarin - Wikipedia

    en.wikipedia.org/wiki/Warfarin

    Vitamin K1-warfarin interaction effect: When warfarin levels are high, people have more risk of bleeding. Conversely, lower levels of warfarin lead to increased risk of blood clots. A narrow range exists where the benefits of warfarin are greater than the risks, its therapeutic window. Certain drugs, herbal medicines, and foods can interact ...

  4. Clotting time - Wikipedia

    en.wikipedia.org/wiki/Clotting_time

    Clotting time is a general term for the time required for a sample of blood to form a clot, or, in medical terms, coagulate.The term "clotting time" is often used when referring to tests such as the prothrombin time (PT), activated partial thromboplastin time (aPTT or PTT), activated clotting time (ACT), thrombin time (TT), or Reptilase time.

  5. Therapeutic drug monitoring - Wikipedia

    en.wikipedia.org/wiki/Therapeutic_drug_monitoring

    Therapeutic drug monitoring (TDM) is a branch of clinical chemistry and clinical pharmacology that specializes in the measurement of medication levels in blood. Its main focus is on drugs with a narrow therapeutic range , i.e. drugs that can easily be under- or overdosed. [ 1 ]

  6. Effective dose (pharmacology) - Wikipedia

    en.wikipedia.org/wiki/Effective_dose_(pharmacology)

    Similarly, the MTD is the highest possible but still tolerable dose level with respect to a pre-specified clinical limiting toxicity. [5] In general, these limits refer to the average patient population. For instances in which there is a large difference between the MED and MTD, it is stated that the drug has a large therapeutic window.

  7. INR self-monitoring - Wikipedia

    en.wikipedia.org/wiki/INR_self-monitoring

    International normalized ratio (INR) which is a derivative of prothrombin time is a measurement of blood coagulation in the circulatory system. Both are used to determine the clotting rate of blood, which can be affected by anticoagulant usage, liver damage and Vitamin K levels. The preferred range of INR levels for a patient on anticoagulation ...

  8. Partial thromboplastin time - Wikipedia

    en.wikipedia.org/wiki/Partial_thromboplastin_time

    The partial thromboplastin time (PTT), also known as the activated partial thromboplastin time (aPTT or APTT), is a blood test that characterizes coagulation of the blood.A historical name for this measure is the Kaolin-cephalin clotting time (KCCT), [1] reflecting kaolin and cephalin as materials historically used in the test.

  9. Discovery and development of direct thrombin inhibitors

    en.wikipedia.org/wiki/Discovery_and_development...

    Dabigatran etexilate is rapidly absorbed, it lacks interaction with cytochrome P450 enzymes and with other food and drugs, there is no need for routine monitoring and it has a broad therapeutic index and a fixed-dose administration, which is excellent safety compared with warfarin. [4]

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