Clotting Time (CT) Test: Booking, Price, and Results
About Clotting Time (CT) Test
| Field | Value |
|---|---|
| Also Known As | Coagulation Time Test, Whole Blood Clotting Time Test |
| Sample Type | Skin prick |
| Fasting Required | No fasting required |
| Report Time | 1 day |
| Recommended For | All ages and genders; commonly ordered before surgical procedures |
| Price | Starting at ₹230 |
What is a Clotting Time (CT) Test?
The clotting time (CT) test measures how long it takes for a blood sample to form a solid clot outside the body. It helps assess whether the blood's coagulation (natural clotting) system is working properly. Doctors commonly order it before surgery or when a patient shows signs of abnormal bleeding. The test is also known as the coagulation time test, or whole blood clotting time test.
What Does a Clotting Time (CT) Test Measure?
The CT test procedure evaluates the time taken by blood to clot in a controlled setting. This reflects how well the clotting factors in the blood are functioning. The table below outlines the test's measured parameter:
| Parameter | Description |
|---|---|
| Clotting Time | The duration for blood to form a stable clot outside the body, expressed in minutes |
The result depends on several proteins called intrinsic pathway clotting factors. If these are deficient or inactive, clotting may be slower or faster than normal.
Why is a Clotting Time (CT) Test Done?
A doctor may order the clotting time (CT) test for various reasons, including pre-operative screening and investigation of abnormal bleeding symptoms.
Common Symptoms That May Require This Test
The following symptoms may prompt a doctor to request this test:
- Frequent or unexplained nosebleeds
- Heavy or prolonged menstrual periods
- Unusual or easy bruising
- Excessive bleeding after dental extractions or minor injuries
- Prolonged bleeding from small cuts
- A general tendency to bleed easily
Conditions This Test Can Help Detect
This test may help identify several bleeding and clotting disorders:
- Haemophilia (an inherited condition where blood does not clot normally)
- von Willebrand disease (a common inherited bleeding disorder caused by low clotting proteins)
- Vitamin K deficiency
- Liver disease affecting clotting factor production
- Disseminated intravascular coagulation (DIC), where clotting and bleeding occur at the same time
- Deficiencies of specific clotting factors (Factors V, VII, VIII, IX, XI, and XII)
- Effects of heparin therapy on clotting
How to Prepare and What to Expect
No special preparation is needed for the clotting time (CT) test. The process is quick and straightforward.
Do You Need to Fast?
No fasting is required before the clotting time (CT) test. You can eat and drink normally on the day of your test. If any additional tests have been ordered alongside this one, check with your doctor whether those require fasting.
Practical Tips Before Your Test
Keep the following points in mind before your appointment:
- Bring a detailed clinical history, including your symptoms, previous test results, and family history, as this is required for the test
- Inform the doctor about all medicines you take, including aspirin, heparin, antihistamines, and vitamin C supplements
- Tell your doctor about any known bleeding or clotting conditions
- Stay hydrated, as this can make sample collection more comfortable
- Wear comfortable clothing that allows easy access to your finger or arm
Step-by-Step Procedure
- A healthcare professional cleans the fingertip or earlobe and makes a small prick using a lancet (a tiny sharp device).
- A stopwatch is started as soon as the blood begins to flow.
- A small blood sample is collected and placed in a clean glass tube kept at body temperature (37°C), without any anticoagulant added.
- The tube is gently tilted at regular intervals, approximately every minute, to check for clot formation.
- The stopwatch is stopped when a stable, firm clot is observed.
- The total time is recorded in minutes as the clotting time result, and the sample is dispatched for documentation.
Factors That Can Affect Accuracy
Certain factors can influence the reliability of the result:
- Traumatic or difficult blood draw causing tissue damage
- Premature activation of the clotting process before testing
- Haemolysis (breakdown of red blood cells) in the sample
- Medications such as aspirin, NSAIDs, and heparin
- Incorrect sample temperature during handling
Understanding Your Clotting Time (CT) Test Results
Your results should always be reviewed with your doctor. The table below shows the general reference ranges for the clotting time test depending on the method used:
| Parameter | Method | Normal Range |
|---|---|---|
| Clotting Time | Lee-White method | 8 to 15 minutes |
| Clotting Time | Capillary method | 1 to 5 minutes |
A result above 15 minutes is considered prolonged and may point to a clotting factor deficiency, liver disease, vitamin K deficiency, or the effect of blood-thinning medication. A shortened clotting time may suggest a higher tendency to form clots, which carries its own health implications.
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain health conditions and medications can affect clotting time results.
Liver disease reduces the production of clotting factors, which can lead to a prolonged clotting time. Patients on heparin therapy will also show longer clotting times, as heparin is a blood thinner. Conditions such as low platelet count (thrombocytopenia), kidney problems causing high urea in the blood (uraemia), and use of aspirin may also alter clotting function.
How to Maintain Healthy Levels
The following general wellness habits support normal clotting function:
- Include vitamin K-rich foods in your diet, such as leafy greens like spinach and broccoli, as vitamin K plays a key role in clotting
- Inform your doctor about all medications and supplements regularly, since many can affect how your blood clots
- Limit excessive alcohol intake, as it can impair liver function and reduce the production of clotting factors
Lupin Diagnostics Clotting Time (CT) Test Price and Home Collection
The CT test cost starts at ₹230 and is available at Lupin Diagnostics with home sample collection offered across cities in India. The table below shows indicative prices:
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 100 |
| CHENNAI | 120 |
| HYDERABAD | 200 |
| KOLKATA | 230 |
| NAVI MUMBAI | 230 |
| PUNE | 230 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- Select the clotting time (CT) test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Lupin Diagnostics offers CT test home collection across cities in India, making it easy to get tested without visiting a centre. All samples are processed in NABL-accredited laboratories by trained professionals. Your digital report is delivered directly to you via email or WhatsApp.
Frequently Asked Questions
The bleeding time (BT) test evaluates how well platelets form an initial plug to stop bleeding, while the clotting time (CT) test assesses the clotting factors that build a stable blood clot. They measure different parts of the body's process for stopping blood loss, and doctors may order both together for a fuller picture of clotting health.
No fasting is needed before the CT test. You can eat and drink as normal before your appointment. If other tests have been ordered at the same time, check with your doctor whether those have separate fasting requirements.
The CT test procedure involves collecting a small blood sample, either through a skin prick (capillary method) or from a vein. The sample is placed in a glass tube, and the time for a stable clot to form is measured. The result is recorded in minutes.
A clotting time that takes longer than the normal range may suggest a deficiency in one or more clotting factors or conditions such as haemophilia, liver disease, or vitamin K deficiency. Your doctor will recommend further tests to identify the specific cause and advise on next steps.
The test involves a small skin prick, which most people find only briefly uncomfortable. Any minor discomfort or small bruise at the collection site typically resolves quickly. The procedure is routine and well-tolerated.
Yes. Blood thinners such as heparin, as well as antiplatelet medications like aspirin, can significantly alter the clotting time result. Always give your healthcare provider a complete list of all medicines, supplements, and vitamins you are currently taking before the test.
An abnormal result should be discussed with your doctor promptly. If the clotting time is prolonged, your doctor may order additional tests to identify the specific clotting factor involved. Do not attempt to interpret results on your own or make any changes to your medications without medical guidance.
Clotting Time (CT) Test: Booking, Price, and Results
