Circular Stapling Instrument
AssigneeCovidien LP
InventorChristopher Penna
Life of this patent
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Abstract
A circular stapling instrument including a stapling forming assembly that is actuated independently from actuation of the cutting assembly is provided. The instrument includes a handle assembly, an elongate body extending from the handle assembly, a cartridge assembly mounted on a distal end of the elongate body. The cartridge assembly includes a pusher assembly and a knife assembly. The knife assembly is selectively fixed relative to the pusher assembly.
Claims13
A circular stapler comprising:
- a handle assembly;
- an elongate body extending from the handle assembly;
- and,
- a cartridge assembly mounted on a distal end of the elongate body, the cartridge assembly including a pusher assembly and a knife assembly, wherein the knife assembly is selectively fixed relative to the pusher assembly for independent movement relative to the pusher assembly, the knife assembly being initially detached from the pusher assembly in a first stroke, and subsequently attached to the pusher assembly in a second stroke.
The circular stapler of claim 6, wherein the snap ring does not extend beyond an outer diameter of the knife carrier when the snap ring is in the compressed condition.
A method of stapling tissue, comprising the steps of:
- providing a surgical stapling instrument having a pusher and a knife assembly, wherein the knife assembly is selectively connected relative to the pusher assembly for independent movement relative to the pusher assembly;
- advancing the pusher assembly to cause an ejection and a forming of staples;
- retracting a pusher adapter of the pusher assembly;
- and
- advancing the pusher adapter to cause an advancement of the knife assembly and a cutting of tissue.
Dependencies are inferred from the claim text.