| 摘要 |
A suture needle holder (or stapler), especially for a heart operation such as anastomosis, has a free-floating armature (10) with a tip (11) having a rough anti-skid surface. Friction force between the tip and the surface of the heart drives the armature and keeps the tip at the site where it rests relative to the moving heart surface. The friction force, plus the force of a weak spring (103) pushing the armature forward, overcome the weight and inertia of the armature so that it remains at the operation site. The armature is slidably coupled to a handle barrel (100) through a bearing guide (110) but a slot (115) and pin (15) prevent axial rotations; the arm is unrestrained in the angle it makes with the axis of the barrel, but the arm cannot rotate about the barrel axis. Jaws (13, 31) at the tip of the arm may be used to grip a suture needle and the needle can be manipulated by rolling the barrel 100 so that the tip 11 rolls over the surface of the heart. One of the jaw (31) is actuated through a flexible cable (33) which does not affect the orientation or extension of the armature.
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