| 主权项 |
1. An aortic cross clamp, comprising:
a locking mechanism for locking and retaining tissue engaging structures in a closed position, a clamp head having opposing jaws having proximal and distal ends and movable between open and closed positions, at least one of the jaws being a pivot jaw pivotally mounted to a pivot jaw actuator arm, the pivot jaw actuator arm being connected to the opposing jaw through a first, proximal pivot axis, the pivot jaw actuator arm and the opposing jaw being movable about the proximal pivot axis to define the open and closed positions, the pivot jaw being pivotally mounted to the pivot jaw actuator arm about a second, medial pivot axis between the proximal and distal ends of the pivot jaw, the medial pivot axis being distanced distally from the proximal pivot axis, the proximal and distal ends of the pivot jaw being free to pivot independently of engagement with another structure, and the pivot jaw being independently pivotal relative to the opposing jaw about the medial pivot axis, the clamp head further comprising a first jaw drive mechanism for moving the jaws between the open and closed positions, a second jaw drive mechanism detachably connectable to the first jaw drive mechanism in the clamp head and operable for moving the jaws between the open and closed positions, wherein the locking mechanism is provided in the clamp head and movable between locked and unlocked positions, wherein the clamp head and an elongated handle have cooperating engagement structure operable from the handle for detachably engaging the clamp head to the distal end of the elongated handle, and cooperating engagement structure for detachably engaging the first jaw drive mechanism to the second jaw drive mechanism, the locking mechanism when placed in the locked position remaining in the locked position when the clamp head is detached from the handle to lock the clamp head in the closed position. |
