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===Ongoing Health Care Needs===
Medicines that thin your blood and prevent blood clots are used to treat DVT. These medicines can thin your blood too much and cause bleeding (sometimes inside the body). This side effect can be life threatening.
Bleeding may occur in the digestive system or the brain. Signs and symptoms of bleeding in the digestive system include:
* Bright red vomit or vomit that looks like coffee grounds
* Bright red blood in your stools or black, tarry stools
* Pain in your abdomen
Signs and symptoms of bleeding in the brain include:
* Severe pain in your head
* Sudden changes in your vision
* Sudden loss of movement in your arms or legs
* Memory loss or confusion
If you have any of these signs or symptoms, get treatment right away.


==References==
==References==

Revision as of 20:49, 22 August 2011

Deep Vein Thrombosis Microchapters

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Deep vein thrombosis
ICD-10 I80.2
ICD-9 453.40
DiseasesDB 3498
MeSH D020246

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Cafer Zorkun, M.D., Ph.D. [2] Ujjwal Rastogi, MBBS [3]

Overview

Pathophysiology

Epidemiology and Demographics

Risk factors

Diagnosis

Treatment

Medical Therapy | Surgery | Primary Prevention | Secondary Prevention

Signs and symptoms

There may be no symptoms referrable to the location of the DVT, but the classical symptoms of DVT include pain, swelling and redness of the leg and dilation of the surface veins. In up to 25% of all hospitalized patients, there may be some form of DVT, which often remains clinically inapparent (unless pulmonary embolism develops).

There are several techniques during physical examination to increase the detection of DVT, such as measuring the circumference of the affected and the contralateral limb at a fixed point (to objectivate edema), and palpating the venous tract, which is often tender. Physical examination is unreliable for excluding the diagnosis of deep vein thrombosis.

In phlegmasia alba dolens, the leg is pale and cool with a diminished arterial pulse due to spasm. It usually results from acute occlusion of the iliac and femoral veins due to DVT.

In phlegmasia cerulea dolens, there is an acute and nearly total venous occlusion of the entire extremity outflow, including the iliac and femoral veins. The leg is usually painful, cyanosed and oedematous. Venous gangrene may supervene.

It is vital that the possibility of pulmonary embolism be included in the history, as this may warrant further investigation (see pulmonary embolism).

A careful history has to be taken considering risk factors (see below), including the use of estrogen-containing methods of hormonal contraception, recent long-haul flying, and a history of miscarriage (which is a feature of several disorders that can also cause thrombosis). A family history can reveal a hereditary factor in the development of DVT.


Imaging the leg veins

Impedance plethysmography, 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

Images courtesy of RadsWiki

  • Example #1: CT images: DVT at left leg


  • Example #2: 2D TOF GRE MRV images: Bilateral deep vein thromboses

Images courtesy of RadsWiki

References

See also

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