| 摘要 |
<p>A guide catheter is formed from the combination of a tubular member and one or more rods insertable and movable longitudinally within the tubular member. The tubular member has a large central lumen to accommodate working catheters, and a shape memory which forms a curved segment in the tubular member. The rod has one or more substantially straight segments of sufficient stiffness to straighten out portions of the curvature imposed by the shape memory. In certain embodiments of the invention, the rod also contains a more flexible segment which permits part of the curvature of the shape memory to remain. Movement of the rod along the length of the curvature imposed by the shape memory permits the user to adjust the length, shape and location of the curve in the guide catheter, depending on the relative lengths of the segments and the shape of the curvature imposed by the shape memory.</p> |
