Utilizing twin-layer or double-layer technology, balloons such as the OPN NC are engineered to withstand extreme inflation pressures (ranging from 35 up to 55 atmospheres). Unlike standard non-compliant balloons, they dilate uniformly without "dog-boning" at high pressures, making them highly effective for localized stent underexpansion or intensely resistant fibrocalcific rings. Trials such as ISAR-CALC have shown that super high-pressure balloons yield comparable, if not superior, angiographic minimum lumen diameters compared to scoring balloons in heavily calcified anatomies.
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