Coagulation level - INR, PT, PTT


Many patients receive drugs "blood thinners" The purpose of these drugs is to reduce the production of blood clots. Mechanisms of action of these drugs varied coagulation time extension to delay / clotting factors blocking action on platelets and more. The diseases that can be "blood thinners" are diseases in which blood clots chance to create high. An example of heart disease after myocardial infarction, heart valve replacement, atrial fibrillation, hypercoagulable, venous thrombosis, etc.

Delay between drugs that work on clotting mechanisms are: warfarin - COUMADIN, CLEXAN, PLAVIX, ANGIOMAX, Heparin and more.

In some of these drugs there is a need to monitor the drug in the blood.

One of the most common drugs is drug warfarin level - COUMADIN. Each person reacts differently to the drug and the level measured in the blood is INR testing.

A person who takes his warfarin his INR is 1. People who take warfarin to prevent blood clots INR level should be between 2 - 3.5 and it depends on the indication for treatment and at the discretion of the attending physician.


The purpose of the blood test is to monitor the drug, balance and maintaining treatment values ​​within the therapeutic rangeLevel of INR less than 2 ineffective to prevent blood clots and need to get the dose and to audit and surveillance. INR level greater than 3.5 can cause bleeding (e.g.  digestion) and therefore must reduce the amount of the drug and to audit and surveillance.

INR testing should be performed only after taking the drug in accordance with the doctor. Initially to balance the desired INR level, should be taken twice a week and then once a week.

If stability levels should be taken at a frequency of once every 3-4 weeks.


Medical Service Company provides service for Checking the INR.

Nurse come up to the door taking the blood test. You can make a subscription to people who need frequent INR level or monitoring and periodic review.

Also, you can come to our laboratory in Holon.

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