Surgery – Instruments – Means for inserting or removing conduit within body
Reexamination Certificate
2001-05-15
2003-02-25
Hale, Gloria M. (Department: 3765)
Surgery
Instruments
Means for inserting or removing conduit within body
C604S104000
Reexamination Certificate
active
06524320
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a cannula for receiving surgical instruments for performing a surgical procedure on a body.
BACKGROUND OF THE INVENTION
A known cannula for receiving surgical instruments is disclosed in U.S. Pat. No. 6,187,000. U.S. Pat. No. 6,187,000 discloses a cannula having an expandable portion. The expandable portion has a slot and a guide member disposed in the slot. The guide member is movable from a first terminal end of the slot to a second terminal end of the slot to enable the cross-sectional area of a passage in the cannula to increase.
SUMMARY OF THE INVENTION
The present invention is a cannula for receiving surgical instruments for performing a surgical procedure on a body. The cannula includes a tube structure defining a passage through which the surgical instruments are inserted into the body. The tube structure includes an expandable portion for enabling an increase in the cross-sectional area of the passage.
The expandable portion of the tube structure has a slot and a guide member disposed in the slot. The guide member is movable from a first end of the slot toward a second end of the slot to enable the cross-sectional area of the passage to increase. The expandable portion has a stop between the first and second ends of the slot engageable with the guide member. The stop retains the guide member in a position relative to the slot and resists movement of the guide member relative to the slot from the position.
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A manual entitled MED™—MicroEndoscopic Discectomy System by Sofamor Danek USA, dated 1996 (pp. 1-33).
Endius Incorporated
Hale Gloria M.
Tarolli, Sundheim, Covell Tummino & Szabo L.L.P.
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