If the prothrombin time test is analyzed in an on-site lab, the results may be available within 24 to 72 hours. If the doctor sends the sample to an off-site lab, results generally take longer, and the patient may want to ask the doctor when to expect the report.Continue Reading
Some patients undergoing anticoagulant therapy need to perform the pro-time test at home about once a week. The FDA approves of four home-testing devices, including the Roche Diagnostics CoaguChek S Prothrombin Time Monitoring System for home use.
This system requires only a small sample taken from a fingerstick. The patient typically sees results on the LED screen in about one minute, which facilitates prompt anticoagulant therapy adjustment.Learn more about Standardized Tests