Cap
Nabl
Ukas
Anab
Customer care
Search
Exact matches only
Search in title
Search in content
Search in comments
Search in excerpt
Filter by Custom Post Type

Prothrombin Time (PT) and International Normalized Ratio (INR)

Blood coagulation is a complex process involving different types of factors and proteins. It helps in stopping bleeding (haemostasis). Several proteins, factors, and enzymes work inconjunction with sequential steps. It is to ensure the formation of a blood clot as soon as bleeding begins after an injury. In order for clotting to happen, an adequate quantity of each of the protein, enzyme, and factor is essential and each single element of the cascade must work properly. PT (Prothrombin Time) is a test that helps detect the cause of excessive bleeding.

INR: International normalized ratio is obtained from the result of PT. It is helpful in assessing the condition of a person undergoing treatment with warfarin – an anticoagulant or blood-thinning medicine.

Why is the test performed?

A PT along with PTT (partial thromboplastin time) may help a physician determine the reason for blood clots and unexplained bleeding. A PT and INR test helps in monitoring the effects of warfarin-an anticoagulant drug. The tests may also be used as pre-surgical screening tests to look for possible bleeding disorders in individuals who may undergo surgery.

When is the test ordered?

A healthcare provider may order a PT when he or she suspects that the person being examined has the signs and symptoms of abnormal bleeding or clotting even thoughthe patient is not on anticoagulant therapy. Such symptoms may include easy bruising or excessive bleeding, bleeding gums, and nosebleeds. The test may also be ordered if the symptoms are associated with any other underlying acute or chronic health condition, such as disseminated intravascular coagulation (DIC) or liver disease.

How is the sample collected?

A blood sample is drawn from a vein in the arm.

How to prepare for the test?

No special preparation is required for the test.

Interpretation of test results

PT and INR is not a diagnostic test by itself as it only indicates some abnormality. It suggests that further testing may be required to confirm the definitive cause and diagnosis.

Therefore, in addition to the PT and INR or along with this test, the other tests that may be ordered include PTT, fibrinogen testing, platelet count, and coagulation factors tests.

High INR or prolonged PT: This may indicate vitamin K deficiency, warfarin therapy, defective factor VII and liver disease.

PT INR Normal values or PT INR Normal range

In healthy young individuals: 1.1 or below

2.0 to 3.0 (for people who are taking warfarin)

The normal INR values for individuals at a very high risk of developing a blood clot is a little bit on a higher side: 2.5 to 3.5.

Patient Testimonials

“Excellence of Apollo Diagnostics is already a recognized fact across India. Adding more strength to their reputation is their caring nature and supportive attitude. I’ll always prefer to take their services than selecting mediocre quality making any compromise with my health.”

Mr. Shahul Hameed, Chennai

Mrs. Turni, Kolkata

“The way Apollo Diagnostics kept me at ease during the sample collection process, the way they supported me to be at my convenience and confidence is really something I’ll always remember. They were also flawless in maintaining the hygiene. Hats off to them!”

Mr. Laxmi Kantham, Hyderabad

“Awesome is probably the one word to express my views about Apollo Diagnostics. Efficiency, punctuality, compassion, sincerity…I’ll give high marks to them in all of these. Great going, Apollo!”

Shivaraj Kadam, Pune

“Thanks for the seamless service. Based on my experience I can assure that, be it quality or punctuality, Apollo Diagnostics is one name to trust and depend on.”

Mr. Thomas, Mysuru

“Excellent sense of timing! The technician arrived right on time. He was really well-trained, in terms of his skill and manner, as well. Apollo Diagnostics is doing a great job.”

Subbalakshmi, Vizag

“Appreciate the quality of service that I’ve received from Apollo Diagnostics. Their competence, caring nature, sincerity, valuing customer’s time – all these together have shaped them as the most trusted diagnostic service provider in the country.
Keep up the good work!

Mrs. Pravati Dash, Bengaluru

“My mother needed a blood test, but was unable to walk due to pain in her leg. A Phlebotomist from Apollo Diagnostics came home and collected the sample. I was informed, via SMS, that the report could be collected from any of the 3 centres in Dibrugarh, downloaded online or even delivered home for a nominal fee. Although the rates were reasonable, my mother also received a senior citizens discount too! This saved my time, money & energy. My aachhe din really seemed to have arrived! Thank you Apollo Diagnostics and hats off for displaying true professionalism.”

Mr. Alokk Kar Dowerah, Dibrugarh

“Whenever I need to have a blood sample collected from home, I ask for Vasu. He is punctual, courteous and so skilled I hardly feel any pain when he draws the sample. Plus, I truly appreciate how quickly the reports are delivered. Thanks Apollo!”

Mr. Sukumar, Film director, Sriram Nagar, Hyderabad

“Their accurate understanding of customer’s needs is one thing that set them apart and ahead of all others. As a result, it becomes easier for them to deliver the right service, that with their matchless efficiency and care to ensure less pain and easily accomplished sample collection. Apollo Diagnostics is simply doing an amazing job!”

Soundarya Abhirami, Hyderabad

“The overall service standard of Apollo Diagnostics is admirably high. The technician was punctual and well-behaved, and has the genuine skill to collect the test sample without troubling the customer. These are probably some of the major reasons for them to be the best in India.”

Mrs. Lakshmi, Chennai

“The most crucial factor with Apollo Diagnostics is that they always train their Phlebotomists so well that the team consistently remains efficient and punctual and we receive a premium quality diagnostic service. Good job. Keep it up.”

Mr. Amit Kumar Patil, Bengaluru