Endoscopic stone extraction device with improved basket

Surgery – Instruments – Means for concretion removal

Reexamination Certificate

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C606S110000, C606S113000, C606S200000

Reexamination Certificate

active

07087062

ABSTRACT:
An endoscopic stone extraction device includes a handle that supports a sheath, and a filament such as a wire slidably disposed in the sheath. One end of the wire is mounted to the handle for rotation with respect to the handle and the other end of the handle supports a stone extraction basket. A manipulator is provided on the wire to allow a user to rotate the filament and therefore the basket with respect to the handle. The basket can have a side-facing opening or a rear-facing opening. In either case, a stone retention region is provided with relatively small openings sized to retain stones smaller than two millimeters in diameter. A collapsible rake is disclosed which facilitates the collection and extraction of stone fragments.

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“Endoscopic Stone Extraction Device with Improved Basket,” U.S. Appl. No. 09/761,786, filed Jan. 17, 2001; inventor Avtar S. Dhindsa.
“Endoscopic Stone Extraction Device with Rotatable Basket,” U.S. Appl. No. 09/761,785, filed Jan. 17, 2001; inventor Avtar S. Dhindsa.
“Endoscopic Stone Extraction Device with Rotatable Basket,” U.S. Appl. No. 09/870,348, filed May 30, 2001; inventor Avtar S. Dhindsa.
Dretler, Stephen P., “The Stone Cone: A New Generation of Basketry”, The Journal Of Urology, vol. 165, May 2001, pp. 1593-1596.

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