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Appointment: 50 minutes
General Health
How to Book a Same-Day Private GP Appointment in London
It’s common to need a GP appointment at short notice. Health concerns don’t always follow a schedule, and symptoms can
May 12, 2026
The way your blood clots plays a very important role in your overall well-being, as blood clotting helps prevent excessive bleeding when a blood vessel is damaged.
To measure just how well your blood clots, a Prothrombin Time (PT) test is recommended. This beneficial blood test is used to assess the function of your blood’s clotting system and can help determine if your blood is clotting normally.
If you are experiencing unexplained bleeding or bruising and have a personal or a family history of blood clots or bleeding disorders, we recommend getting a Prothrombin Time test.
This test is also recommended if you are undergoing treatment with anticoagulant medications or are currently being evaluated for liver disease or a vitamin K deficiency (and about 4 to 16 million adults may have subclinical low vitamin K levels in the UK).
Luckily, you won’t be expected to interpret your results yourself. One of our doctors at our clinics in the London area will do that for you. However, to give you an idea of what we will typically be looking at, here is a brief overview:
A Prothrombin Time blood test helps detect abnormal blood clotting. Assessing how well your blood clots matters, as slow clotting can lead to serious health issues, such as thrombosis (excessive clotting) or bleeding, known as haemorrhage (when insufficient clotting occurs).
However, that is not the only benefit a PT test offers. This beneficial blood test also helps detect and monitor conditions that affect clotting, including:
Several factors can influence Prothrombin Time results. Some of these include:
Use our online booking engine or book your test by giving us a call.
On the online booking engine select the “appointment type” you need.
You will be seen by one of our friendly phlebotomists or trained clinicians.
We strongly recommend you inform your doctor about all medications, supplements, and herbal remedies you are taking. This is very important, as some of these can affect blood clotting time. Also be sure to share any history of bleeding disorders you may have, recent surgeries you have undergone, or other illnesses that might affect your clotting.
Inform your doctor if you feel anxious or have a history of fainting during blood draws. Just remember, only a small amount of blood will be drawn from a vein, typically in the arm. The process usually takes only a few minutes and is minimally painful.
Your results are usually available within a day or two. Your doctor will discuss them with you, and if you are on anticoagulants, your doctor may (or may not) suggest periodic PT/INR testing to monitor and adjust your dosage.
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We offer a wide range of private blood tests in London. Same-day appointments are available 5 days a week.
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