Risks

A prothrombin time test is similar to any other blood test. You might experience soreness or minor bruising at the site in the arm where your blood is drawn.

References
  1. Zehnder JL. Clinical use of coagulation tests. http://www.uptodate.com/home. Accessed Sept. 16, 2015.
  2. AskMayoExpert. Cardiac surgery excessive bleeding. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2014.
  3. Drews RE. Approach to the adult patient with a bleeding diathesis. http://www.uptodate.com/home. Accessed Sept. 16, 2015.
  4. PT and INR. Lab Tests Online. http://www.labtestsonline.org/understanding/analytes/pt/glance.html#. Accessed Sept. 16, 2015.
  5. Bambha K, et al. Model for end-stage liver disease (MELD). http://www.uptodate.com/home. Accessed Sept. 16, 2015.
  6. AskMayoExpert. Abnormal liver tests (adult). Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2014.
  7. Cameron JL, et al, eds. Coagulopathy in the critically ill patient. In: Current Surgical Therapy. 11th ed. Philadelphia, Pa.: Saunders Elsevier; 2014. http://www.clinicalkey.com. Accessed Sept. 16, 2015.
  8. Litin SC (expert opinion). Mayo Clinic, Rochester, Minn. Oct. 7, 2015.
  9. Prothrombin time. Mayo Medical Laboratories. http://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/9236. Accessed Sept. 16, 2015.
  10. AskMayoExpert. Monitoring anticoagulation effects of warfarin (adults). Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2015.