Need for investigation
|Signs and symptoms of deep vein thrombosis, at least with leg swelling and pain upon palpation of deep veins.||3|
|No alternative diagnosis better explains the presentation||3|
|Heart rate over 100/min||1.5|
|Immobilization >3 days or surgery in past 4 weeks||1.5|
|Previous pulmonary embolism or deep vein thrombosis||1.5|
|Malignancy (current or treated in the past 6 months)||1|
Choice of modality
Further information on modalities:
- For a full list of contributors, see article Radlines:Authorship for details. . Creators of images are attributed at the image description pages, seen by clicking on the images. See
- Pregnant patients
First trimester Second trimester Third trimester mg/L or µg/mL < 0.5 < 0.95 < 1.29 < 1.7 µg/L or ng/mL < 500 < 950 < 1290 < 1700 nmol/L < 2.7 < 5.2 < 7.1 < 9.3
Reference: Reference Values During Pregnancy at perinatology.com. Retrieved October 2014.
- Elderly patients
Patient’s age in years × 10 µg/L (or x 0.056 nmol/L) for patients aged over 50 years for the suspicion of venous thromboembolism (VTE).
". J Fam Pract 63 (3): 155–8. March 2014. PMID 24701602.
- Raja, Ali S.; Greenberg, Jeffrey O.; Qaseem, Amir; Denberg, Thomas D.; Fitterman, Nick; Schuur, Jeremiah D. (29 September 2015). "Evaluation of Patients With Suspected Acute Pulmonary Embolism: Best Practice Advice From the Clinical Guidelines Committee of the American College of Physicians
- Writing Group for the Christopher Study Investigators (2006). "Effectiveness of Managing Suspected Pulmonary Embolism Using an Algorithm Combining Clinical Probability, D-Dimer Testing, and Computed Tomography ". JAMA 295 (2): 172. doi:10.1001/jama.295.2.172. ISSN 0098-7484.
- "Plasma measurement of D-dimer levels for the early diagnosis of ischemic stroke subtypes ". Archives of Internal Medicine 162 (22): 2589–93. 2002. doi:10.1001/archinte.162.22.2589. PMID 12456231. Archived from the original. .