| 摘要 |
A guide wire unit includes a section which can be stiffened in a manner controlled by a pressure medium. The section has a pressure channel for the controlled production of a stiffening pressure by introducing a pressure medium, and flexible stiffening elements that are forced one against the other in a manner increasing the stiffening effect when subjected to a pressure load by the effect of the stiffening pressure. The flexible stiffening elements have an inner stiffening tube part and a radially less flexible outer stiffening tube part surrounding the same. Under the effect of the stiffening pressure, the inner stiffening tube part is forced against the interior of the outer stiffening tube part, thereby increasing the stiffening effect. A distal end section can be mounted distally and/or a stiff section can be mounted proximally in front of the controlled stiffness section. A center guide wire core may extend in the controlled stiffness section. The guide wires are usable as guide wires for positioning medical catheters.
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