Deep Venous Thrombosis
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Deep Venous Thrombosis In Gujarat, India SYMPTOMS
What Are the Causes of DVT?
There are many things that can contribute to causing a DVT. For example, venous damage, increased blood viscosity, surgery, infectious diseases, age 75 and older, cancer, genetic disorders, hormonal changes, certain drugs, previous DVT, and even the lack of leg movement or sitting in a way that decreases leg blood circulation may contribute to DVT (or PE) formation.
Who Is at Risk for DVT?
Risk factors are similar to those causes listed in the previous slide and include:
Previous DVT (or PE)
Age 75 or older
Immobilization (3 or more days)
Long car or plane trips (especially if sitting is constant without breaks for walking)
Any major medical or surgical problems (for example, cancer, stroke, heart attack, congestive heart failure, burns, spinal cord injuries, multiple trauma, leg fractures, and many others)
IV drug abuse
Certain drugs (oral contraceptives, estrogens, heparin-induced thrombocytopenia)
Genetic causes
DVT and Pregnancy
Due to high levels of estrogen in pregnancy, during and until about 4 to 6 weeks after delivery, women have a higher risk for DVTs. Estrogen may promote clotting and the large uterus can press against vessels and slow blood flow. Such women (and some men) that have other health problems such as genetic clotting disorders, lupus, homocystinuria, and other blood disorders are also at higher risk for DVT development.
DVT and Hormonal Birth Control
Hormonal birth control and postmenopausal hormonal therapy may increase an otherwise normal woman’s risk of DVTs
DVT and Travel
As mentioned, traveling can be a significant risk factor for DVTs. Sitting with bent knees on an airplane or in a bus, car, or train markedly increases a person’s risk of developing a DVT. This risk increase is due to sluggish blood flow in the bent and stationary legs. Just a few hours (about 4 or so) is enough to increase DVT risk.
DVT Diagnosis
After doing a person’s history and physical exam, if the doctor suspects a DVT, ultrasound or ultrasonography is usually the first test of choice to detect the clot. This test has high sensitivity and specificity for DVTs and is not invasive. Other tests are available, but most are invasive while ultrasound is not.
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