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Fig. 1B. —Peripheral Cutting Balloon (InterVentional Technologies, San Diego, CA). Photograph of balloon during inflation shows microtomes (black arrows) exposed and pressed into adjacent structures. Balloon expands vessel wall, resulting in directed longitudinal dissection at angioplasty site. This mechanism should minimize wall tension during angioplasty and enable angioplasty of rigid lesions to larger diameter than achieved using conventional angioplasty. Radiopaque markers (white arrows) can be seen through balloon material. Four-leg support (arrowheads) assists in retraction of blades into balloon folds during deflation.

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