椭圆管环容易适合圆形柔性导管。
而且，导管可以配置为沿其整个长度具有截面轮廓或预定的柔性，从而导致该导管在预定方向上弯曲、卷曲或移动。
Further, a catheter may be configured to have a cross sectional profile or a predefined flexibility along its entire length that causes the catheter to bend, curve or move in a predefined direction.
而且，导管可以配置为沿其整个长度具有截面轮廓或预定的柔性，从而导致该导管在预定方向上弯曲、卷曲或移动。
Further, a catheter may be configured to have a cross sectional profile or a predefined flexibility along its entire length that causes the catheter to bend, curve or move in a predefined direction.
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