| 摘要 |
A catheter has a control handle with at least an outer thumb control and an inner second thumb control. A longer puller wire has a distal end anchored at or near a distal end of distal deflectable portion. A shorter puller wire has a distal end anchored at or near a distal end of the proximal deflectable portion. For the shorter puller wire, a shorter compression coil has a distal end at or near a proximal end of the intermediate deflectable section. For the longer puller wire, a longer compression coil has a distal end at or near a distal end of the shorter puller wire. The inner and outer thumb controls include engagement members releasable by rotation of one thumb control relative to the other. When disengaged, the thumb controls each can be moved longitudinally relative to each other. When engaged, the thumb controls are coupled together for longitudinal movement as a single unit relative to the control handle..
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