| 摘要 |
A catheter extrusion includes one or more extra steering wire lumens to route one or more steering wires that facilitate steering of a distal end in more than one plane. To make room in an extrusion, for extra steering wires, the extrusion may define a smaller operational lumen. Alternatively, a designer/manufacturer may increase the size of the extrusion from to facilitate one or more extra operational lumen(s). An existing Naviscope pistol grip assembly is modified to include a second plane steering wheel than transfers a pressing force on one or more buttons thereof into rotational motion that causes corresponding tension in respective one or more a steering wire(s) connected thereto. The additional steering wires are guided by existing steering guide wheels used for two-wire steering.
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