Deep vein thrombosis other imaging findings: Difference between revisions
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A number of invasive and non-invasive approaches are possible.<ref name="pmid17261857">{{cite journal| author=Snow V, Qaseem A, Barry P, Hornbake ER, Rodnick JE, Tobolic T et al.| title=Management of venous thromboembolism: a clinical practice guideline from the American College of Physicians and the American Academy of Family Physicians. | journal=Ann Intern Med | year= 2007 | volume= 146 | issue= 3 | pages= 204-10 | pmid=17261857 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=17261857 }} </ref> Doppler ultrasonography, due to its high sensitivity, specificity and reproducibility, has replaced venography as the most widely used test in the evaluation of the disease. | A number of invasive and non-invasive approaches are possible.<ref name="pmid17261857">{{cite journal| author=Snow V, Qaseem A, Barry P, Hornbake ER, Rodnick JE, Tobolic T et al.| title=Management of venous thromboembolism: a clinical practice guideline from the American College of Physicians and the American Academy of Family Physicians. | journal=Ann Intern Med | year= 2007 | volume= 146 | issue= 3 | pages= 204-10 | pmid=17261857 | doi= | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=17261857 }} </ref> Doppler ultrasonography, due to its high sensitivity, specificity and reproducibility, has replaced venography as the most widely used test in the evaluation of the disease. | ||
==Imaging Techniques== | |||
#[[Impedance plethysmography]]<ref name="pmid11330789">{{cite journal| author=Line BR| title=Pathophysiology and diagnosis of deep venous thrombosis. | journal=Semin Nucl Med | year= 2001 | volume= 31 | issue= 2 | pages= 90-101 | pmid=11330789 | doi= | pmc= | url= }} </ref> : A venous thrombosis alters the normal response to temporary venous obstruction in a highly characteristic way. It causes a delay in emptying of the venous system after the release of the tourniquet. | #[[Impedance plethysmography]]<ref name="pmid11330789">{{cite journal| author=Line BR| title=Pathophysiology and diagnosis of deep venous thrombosis. | journal=Semin Nucl Med | year= 2001 | volume= 31 | issue= 2 | pages= 90-101 | pmid=11330789 | doi= | pmc= | url= }} </ref> : A venous thrombosis alters the normal response to temporary venous obstruction in a highly characteristic way. It causes a delay in emptying of the venous system after the release of the tourniquet. | ||
#Doppler ultrasonography | #Doppler ultrasonography | ||
#Compression [[medical ultrasonography|ultrasound]] scanning of the leg veins, combined with duplex measurements (to determine blood flow) | #Compression [[medical ultrasonography|ultrasound]] scanning of the leg veins, combined with duplex measurements (to determine blood flow) | ||
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can reveal a [[blood clot]] and its extent (i.e. whether it is below or above the [[knee]]). | can reveal a [[blood clot]] and its extent (i.e. whether it is below or above the [[knee]]). | ||
===Examples=== | |||
[http://www.radswiki.net Images courtesy of RadsWiki] | [http://www.radswiki.net Images courtesy of RadsWiki] | ||
Revision as of 14:37, 25 April 2012
Editors-in-Chief: C. Michael Gibson, M.S., M.D. Associate Editor-In-Chief: Ujjwal Rastogi, MBBS [1]
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Overview
A number of invasive and non-invasive approaches are possible.[1] Doppler ultrasonography, due to its high sensitivity, specificity and reproducibility, has replaced venography as the most widely used test in the evaluation of the disease.
Imaging Techniques
- Impedance plethysmography[2] : A venous thrombosis alters the normal response to temporary venous obstruction in a highly characteristic way. It causes a delay in emptying of the venous system after the release of the tourniquet.
- Doppler ultrasonography
- Compression ultrasound scanning of the leg veins, combined with duplex measurements (to determine blood flow)
can reveal a blood clot and its extent (i.e. whether it is below or above the knee).
Examples
- Example #1: CT images: DVT at left leg
- Example #2: 2D TOF GRE MRV images: Bilateral deep vein thromboses
References
- ↑ Snow V, Qaseem A, Barry P, Hornbake ER, Rodnick JE, Tobolic T; et al. (2007). "Management of venous thromboembolism: a clinical practice guideline from the American College of Physicians and the American Academy of Family Physicians". Ann Intern Med. 146 (3): 204–10. PMID 17261857.
- ↑ Line BR (2001). "Pathophysiology and diagnosis of deep venous thrombosis". Semin Nucl Med. 31 (2): 90–101. PMID 11330789.