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US 10,117,661 B2Granted
Stone extracting medical device with better stone retention
AssigneeCook Medical Technologies LLC
InventorsRobert G. Lippitt, Raymond F. Lippitt
Life of this patent
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Abstract
A medical device comprising a cannula having a stone extracting unit on its distal end and a hand piece on its proximal end for operating the unit through the cannula. The unit includes more than four annularly arranged tubular elements with fixed proximal ends and distal ends movable between opened and closed position by the movement of an equal number of wire elements extending through the tubular elements with their distal free ends fixed to the distal ends of tubular elements so as to define a 5 or 6 pointed star configuration.
Claims14
A medical device comprising:
- an elongated cannula assembly having a proximal end and a distal end,
- a hand piece assembly connected to the proximal end of the elongated cannula assembly, and
- a stone extracting unit on the distal end of the elongated cannula assembly, the elongated cannula assembly including a fixed cannula component and a movable cannula component movable in opposite directions, with respect to the fixed cannula component,
- the hand piece assembly including a fixed hand piece component connected to a proximal end of the fixed cannula component and a movable hand piece component connected to a proximal end of the movable cannula component to move the movable cannula component in opposite directions in response to the movement of the movable hand piece component in opposite directions with respect to the fixed hand piece component,
- the stone extracting unit including more than four tubular elements having proximal end portions fixed together in an annular arrangement in fixed relation to a distal end of the fixed cannula component and an equal number of wire elements, each wire element of the equal number of wire elements extending through a respective tubular element of the more than four tubular elements,
- each wire element having a proximal end portion extending proximally beyond the proximal end of the respective tubular element connected to be moved in opposite directions in response to the movement of the movable cannula component in opposite directions,
- each wire element having a distal end portion extending distally beyond the distal end of the respective tubular element, the distal end portion of each wire element having a free end connected in a fixed relation to a distal end of an associated tubular element of the more than four tubular elements, and
- the respective tubular element and the associated tubular element being disposed neither adjacent to one another nor diametrically opposed to one another in the annular arrangement thereof so as to cause the distal ends of the respective tubular element and the associated tubular element to move between opened and closed positions in response to the movement of each wire element in opposite directions.
5 more elements
A medical device comprising:
- an elongated cannula assembly having a proximal end and a distal end,
- an operable stone extracting unit on the distal end of the elongated cannula assembly, and
- a moving assembly on the proximal end of the elongated cannula assembly constructed and arranged to operate the operable stone extracting unit through the elongated cannula assembly,
- the operable stone extracting unit including more than four annularly arranged fixed flexure elements fixed at proximal ends for flexure outwardly therefrom and an equal number of movable flexure elements,
- each movable flexure element being movably associated with respect to a respective fixed flexure element of the fixed flexure elements and fixedly associated with respect to an associated fixed flexure element which is neither adjacent nor opposite in the annular arrangement with respect to the respective fixed flexure element, wherein each movable flexure element extends through the respective fixed flexure element and has a distal end portion extending distally beyond a distal end of the respective fixed flexure element, the distal end portion of each movable flexure element having a free end connected in a fixed relation to a distal end of the associated fixed flexure element, and
- each fixed flexure element being associated with two force applying movable flexure elements which converge thereto in a V-formation to form a point of a star configuration and ensure radial movement of the point with respect to the annular arrangement in response to the movement of the moveable flexure elements.
3 more elements
Dependencies are inferred from the claim text.