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  • Balloon angioplasty catheters that include an ultrasonic transducer mounted proximal to balloon for imaging purposes; they combine the capabilities of balloon angioplasty catheters and ultrasonic image vascular catheters. These catheters are supplied in a standard 5.5 Fr model and also in a lower profile version of 3.5 Fr; both over-the-wire and monorail versions are available. Combined balloon angioplasty/ultrasound image catheters permit ultrasound guided angioplasty using only one catheter, avoiding repeated exchanges after each successive balloon inflation. These catheters are mostly used in percutaneous transluminal coronary angioplasty to modify the dilatation strategy by obtaining intravascular morphologic and quantitative information (e.g., lesion calcification, eccentricity, accurate lumen dimension) complementary to that obtained from angioplasty; they can also quantify the true degree of residual stenosis and plaque burden after angioplasty, which may have important implications for restenosis.
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