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Tuesday, Jan 1, 2013 8:30 AM UTC

A blood clot’s danger depends on where it is

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Topics: From the Wires,

Blood clots like the one that Secretary of State Hillary Rodham Clinton is being treated for following her recent concussion can occur for a host of reasons.

How serious a clot is depends on where it is and why it formed. In a statement Monday, Clinton’s doctors say her clot was located in a vein in the space between the brain and the skull behind the right ear.

WHAT THEY ARE: Blood pools and thickens into a clot after an injury or because of a heart problem, clogged arteries or other condition. Clots also can break off and travel to another part of the body.

WHERE THEY OCCUR: In leg veins (called deep vein thrombosis) or in blood vessels in the neck, brain or lungs. Leg clots are a common risk after someone has been bedridden. Clots are most dangerous when they travel to the lungs, a potentially life-threatening situation, or to the brain, where they can cause a stroke.

RISK FACTORS: High blood pressure, diabetes, birth control pills, pregnancy, stroke, recent surgery, prolonged sitting, circulation problems and heart problems — especially an irregular heartbeat called atrial fibrillation — raise the chances of developing a blood clot.

TREATMENT: Sometimes a blood thinner such as warfarin (Coumadin) is prescribed to allow the clot to dissolve by itself over time and prevent new ones from forming.

By Marilynn Marchione

More By Marilynn Marchione.

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Gripping photos: The people of the Turkey protests (slideshow)

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  • The protests take on a festive element as police forces move out of the park and square. Wearing a gas mask, this young man dances to traditional Turkish music in front of Taksim Square’s Ataturk Monument.

  • In Gezi Park since March 31st, this protester, originally caught off-guard by the Government’s teargas and water cannons, went out and bought a Russian army mask from WWII, preparing for what was to come.

  • This rambunctious boy seems to be enjoying the chaos. After taking this picture he threw a stone at the already destroyed building in the background.

  • Forming a line, the police face off directly with protesters in Taksim Square. After a while, they retreated and there was a general cheer – a back-and-forth dance that has been common since the beginning of this protest.

  • An elderly woman in Gezi Park reads the news. The tent community occupying the park was violently destroyed on June 16th.

  • Many different groups had set up booths to promote their cause in Taksim Square and Gezi Park. Standing in front of one, this man waves his flag while posing with conviction.

  • Many home-remedies are used to minimize the effects of tear gas. This woman has put a milky solution on her face, removing her mask after the tear gas dissipated. Before sunrise, the police came again for another round of teargasing.

  • People capitalize on the uprising -- selling flags, beer, gas masks, sky lanterns and spray paint to name just a few of the popular items.

  • On Monday morning, June 11, the police execute a strong offensive. Many plain-clothed police officers, like the ones seen here, clash with protesters in the side streets away from the main stand-off in Taksim.

  • The authorities seem to be most aggressive in the night, pushing protesters away from the square and park. After being teargassed this young woman catches her breath with other protesters on Siraselviler Street.

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