| 摘要 |
A surgical instrument including a sleeve that is separable from the remainder of the surgical instrument to facilitate tool exchange without removing the sleeve from a patient's body. The surgical instrument includes a pair of handles coupled to a housing assembly that includes a drum assembly. A knob assembly is coupled to the housing assembly via a bearing shaft having a groove formed thereon for receiving a movable locking plate that is secured to a knob of the knob assembly. The locking plate is movable between a locked and an unlocked position such that in the locked position a tool received in the sleeve is retained within the surgical instrument and in the unlocked position the sleeve is separable from the remainder of the surgical instrument. The sleeve can remain in situ within the patient's body while the tool is exchanged with another one and reinserted into the sleeve.
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