Coagulation

Coagulation tests look at how quickly and how well your blood forms a clot. Clotting has to be balanced: clotting too slowly can cause bleeding, and clotting too quickly can cause unwanted clots.

Healthcare worker in gloves drawing a blood sample for a coagulation test

About coagulation

Coagulation tests look at how quickly and how well your blood forms a clot. Clotting has to be balanced: clotting too slowly can cause bleeding, and clotting too quickly can cause unwanted clots. Coagulation tests check how well your blood clots. They are often requested before a procedure or while a person is taking blood-thinning medicines.

What these tests show

Coagulation results are usually given as a time in seconds, or as a ratio, compared with a reference value. Well-known examples in this area are prothrombin time (PT) with INR, and activated partial thromboplastin time (aPTT). Your doctor decides which ones are needed.

Why they are requested

They are often ordered before surgery or a dental procedure, when someone bruises or bleeds easily, and regularly for people on certain blood-thinning medicines, where the result helps the doctor adjust the dose.

Before your visit

Tell us if you take any blood-thinning medicine and when you took the last dose. Do not stop or change a medicine unless your doctor tells you to. Coagulation samples need careful timing, so please contact the laboratory before you come.

Your report

We confirm the report time when the sample is taken. If your doctor needs the result quickly, mention it on WhatsApp or by phone.

Please note: this page explains the service in general terms. It is not medical advice. Ask your doctor which tests you need, and contact Aarogya Seva Lab to confirm that a specific test is available.

Ready to book a coagulation test?

Call or WhatsApp Aarogya Seva Lab to confirm the test, preparation and report timing.