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angioplasty
Angioplasty (or Balloon angioplasty) is an endovascular procedure to widen narrowed or obstructed arteries or veins, typically to treat arterial atherosclerosis. An empty, collapsed balloon, known as a balloon catheter, is passed over a wire into the narrowed locations and then inflated to a fixed size. The balloon forces expansion of the stenosis (narrowing) within the vessel and the surrounding muscular wall, opening up the blood vessel for improved flow, and the balloon is then deflated and withdrawn. A stent may or may not be inserted at the time of ballooning to ensure the vessel remains open.
The word is composed of the combining forms of the Greek words ἀγγεῖον ''angīon'' ‘vessel’/‘cavity’ (of the human body) and πλάσσω ''plasso'' ‘form’/‘mould’. Angioplasty has come to include all manner of vascular interventions that are typically performed in a minimally-invasive or ''percutaneous'' method.
==Uses==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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