The weather stays humid, which could lead to some fog late tonight as winds go calm. Temperatures will cool to the upper 60's. Thursday looks to be the hottest day of the week. Highs will be near 90, and with the humidity factored in, the heat index hits the middle 90's. We'll be under a mostly sunny sky throughout the day. After another very warm day on Friday, temperatures drop dramatically into the 70's by the weekend.
Prothrombin time chart. See the list below: The reference range for prothrombin time is 9.5-13.5 seconds. The reference range for international normalized ratio (INR) is less than 1.3. However, the normal range is highly variable and dependent on the laboratory performing the test.
A PT and INR are ordered on a regular basis when a person is taking the anticoagulant drug warfarin to ensure that the prescription is working properly and that the PT/INR is appropriately prolonged. There is no set frequency for doing the test.omeone who is not taking warfarin would compare their PT test result to the normal range provided with the test result by the laboratory performing the test. A prolonged PT means that the blood is taking too long to form a clot.