D-Dimers (Fibrinogen Degradation Products) (Must reach lab within 2 hrs)
Private D-Dimers blood test in London for £97.99, measuring one clot-breakdown marker. The citrate sample must reach the laboratory within 2 hours.
Turnaround time
1 business day
Biomarkers count
1
Book your test
Choose Service Type
Professional phlebotomist comes to you
+ £{{ home_visit_fee }}
Visit our clinic for your test
{{ clinic_visit_fee > 0 ? '+ £' + clinic_visit_fee : 'Free' }}
Home Visit Details
Home visits require at least 24 hours notice.
Select a clinic: Sorting by distance…
{{ clinicAddress(clinic) }}
{{ clinicAddress(selectedClinic) }}
Select a date
Select an hour
Available time slots: {{ timeSlots.length}}
Overview of the D-Dimers (Fibrinogen Degradation Products)
The D-Dimers (Fibrinogen Degradation Products) blood test measures D-dimer, a fragment produced when cross-linked fibrin within a blood clot is broken down.
The test contains 1 biomarker: D-Dimers (Fibrinogen Degradation Products).
D-dimer is most useful within established clinical pathways for assessing suspected venous thromboembolism, particularly deep vein thrombosis (DVT) and pulmonary embolism (PE).
It should not be used as a general screening test for blood clots in otherwise well people.
D-dimer has high clinical value primarily because a negative result can help exclude DVT or PE in appropriately selected patients whose clinical probability is low or unlikely.
A positive D-dimer is much less specific.
Concentrations can increase with thrombosis, but also with increasing age, infection, inflammation, pregnancy, recent surgery, trauma, malignancy, liver disease and many other conditions.
A positive result therefore does not diagnose a blood clot.
Clinical probability must be assessed first using an appropriate pathway, and imaging such as ultrasound or CT pulmonary angiography may be required depending on symptoms and the D-dimer result.
The specimen requirements are particularly important for this product.
A correctly filled citrate blood sample must reach the laboratory within 1 day according to the collection requirements associated with this service.
This makes the test unsuitable for collection routes that cannot guarantee sufficiently rapid transport.
Most importantly, suspected acute DVT or pulmonary embolism should not be managed by waiting for a routine private laboratory appointment.
What Does the D-Dimers (Fibrinogen Degradation Products) Test Check?
This test measures 1 biomarker.
D-Dimers (Fibrinogen Degradation Products)
Measures fibrin degradation fragments produced during breakdown of cross-linked blood clot. A negative result can help exclude venous thromboembolism in appropriately selected low-risk patients, while an elevated result is non-specific and generally requires clinical correlation.
Who May Benefit From the D-Dimers (Fibrinogen Degradation Products) Test?
D-dimer testing is most appropriate when used within a clinician-led pathway for suspected venous thromboembolism.
People assessed as having a low or unlikely clinical probability of DVT - A negative D-dimer can help determine whether further imaging is required.
People assessed as having a low or unlikely clinical probability of pulmonary embolism - D-dimer may be used within an established diagnostic pathway.
People specifically advised by a clinician to obtain a D-dimer - Testing should ideally follow clinical assessment rather than being used as indiscriminate screening.
People with symptoms where another clinician has already assessed the urgency - D-dimer can provide supporting information when immediate emergency referral is not required.
People with a previous abnormal D-dimer requiring clinically directed reassessment - Repeat testing may occasionally be requested for a specific medical reason.
People undergoing selected specialist coagulation assessment - D-dimer can also be used in other coagulation settings under specialist guidance.
People able to attend a collection pathway meeting the 2-hour transport requirement - Sample integrity is essential for reliable coagulation testing.
How to Prepare
Do not delay urgent medical assessment simply to arrange a private D-dimer.
The value of D-dimer depends heavily on the pre-test clinical probability of thrombosis, not just the laboratory number.
Symptoms and Reasons to Consider the D-Dimers (Fibrinogen Degradation Products) Test
Symptoms of DVT or PE require medical assessment because the decision to perform D-dimer testing depends on clinical probability.
New one-sided leg swelling - Unilateral swelling can occur with DVT but also has several other possible causes.
New calf or leg pain - Pain and tenderness can occur with venous thrombosis, particularly when accompanied by swelling.
Unexplained shortness of breath - Sudden breathlessness can be a symptom of pulmonary embolism and requires prompt assessment.
Chest pain that is worse when breathing - Pleuritic chest pain can occur with PE but has several other important causes.
Coughing up blood - Haemoptysis can occur with pulmonary embolism and requires urgent medical evaluation.
Unexplained rapid heart rate with respiratory symptoms - Tachycardia can form part of a PE presentation but is non-specific.
Symptoms following recent major surgery or immobilisation - These circumstances can increase thrombotic risk and should be incorporated into clinical probability assessment.
This test should not be used to delay assessment of possible acute DVT or pulmonary embolism.
Sudden unexplained breathlessness, chest pain, coughing blood, collapse or severe one-sided leg swelling requires urgent same-day or emergency medical assessment.
A D-dimer result cannot safely replace a clinical probability assessment or appropriate diagnostic imaging.
How to Book Your D-Dimers (Fibrinogen Degradation Products) Test
Because of the strict sample transport requirement, this test needs a suitable collection pathway.
Choose the D-Dimers (Fibrinogen Degradation Products)
Select the test and confirm that private D-dimer testing is clinically appropriate rather than emergency assessment.
Select your sample collection option
Use a collection location specifically able to deliver the citrate sample to the laboratory within 1 day.
Attend your appointment
A trained professional fills the citrate tube correctly and records the collection time.
Laboratory analysis
The sample is transported promptly and analysed for D-dimer concentration.
Receive your results securely
Your authorised result is delivered securely and should be reviewed within the clinical context in which the test was requested.
When Will I Receive My Results?
The expected laboratory turnaround for the D-Dimers (Fibrinogen Degradation Products) test is approximately 1 business day after an acceptable specimen enters the laboratory.
The critical limitation occurs before analysis: the sample must reach the laboratory within the required collection window.
A delayed, underfilled or otherwise unsuitable citrate specimen may be rejected and require recollection.
Understanding Your Results
A D-dimer result below the relevant assay threshold can help exclude DVT or PE when the person's pre-test clinical probability is appropriately low or unlikely.
It should not be interpreted independently in someone with a high clinical probability of thrombosis.
An elevated D-dimer means increased fibrin formation and breakdown is occurring somewhere in the body.
It does not reveal where that process is occurring and does not prove DVT or PE.
D-dimer can rise with age, infection, inflammatory illness, pregnancy, surgery, trauma, malignancy and numerous other conditions.
For people over 50, some clinical pathways use an age-adjusted threshold depending on the assay and clinical setting.
A positive result usually means that further clinical assessment or imaging may be needed rather than that anticoagulant treatment should automatically begin.
The result should always be interpreted according to the laboratory method and the clinical pathway being used.
Why Book With London Blood Tests?
Private D-dimer testing in London - Access targeted measurement of fibrin degradation products when clinically appropriate.
Clinically recognised VTE marker - D-dimer is widely used within diagnostic pathways for suspected DVT and pulmonary embolism.
Strict sample handling recognised - This test is clearly identified as requiring rapid transport to the laboratory.
Targeted individual coagulation marker - Measure D-dimer independently where specifically requested.
Specialist coagulation analysis - The citrate specimen is processed using established haemostasis methodology.
Clear interpretation limits - An elevated result is recognised as non-specific and not diagnostic of a blood clot.
Secure results by email - Receive your authorised report securely.
Clear pricing before booking - The D-Dimer test costs £97.99.
Private D-Dimers (Fibrinogen Degradation Products) Blood Test in London
London Blood Tests provides the D-Dimer blood test in London for appropriately selected people requiring measurement of fibrin degradation products.
The test costs £97.99 and measures one biomarker: D-Dimers (Fibrinogen Degradation Products).
The citrate blood specimen must reach the laboratory within 1 day, so collection must be arranged through a pathway capable of meeting that requirement.
D-dimer testing is not a replacement for emergency assessment of suspected DVT or pulmonary embolism.
Its greatest diagnostic value is as part of an established clinical pathway where pre-test probability has already been assessed.