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  • Angioplasty vascular catheters that dilate a stenotic artery by controlled inflation of a distensible balloon. These catheters usually consist of a double-lumen tube with a balloon in the distal tip and a side hole that is used for pressure recording and contrast material ejection. Typically, a guiding catheter is peripherally inserted and advanced into the section of the artery requiring dilatation; this catheter guides the dilating catheter into the stenotic arterial branch, where the balloon is inflated across the stenosis to a predetermined maximal outer diameter, thereby enlarging the lumen. After balloon deflation, the catheter is withdrawn. These catheters are mostly used for the treatment of obstructions in the coronary arteries and aortocoronary saphenous vein bypass grafts, but they are also used in the treatment of other arterial (e.g., renal artery, peripheral arteries) occlusive diseases.
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