Medical retrieval basket with legs shaped to enhance capture and reduce trauma
AssigneeSciMed Life Systems, Inc.
InventorsJames S. Bates, James W. Riley
Life of this patent
Estimating the term…
Abstract
A medical retrieval device, and related method, uses a basket formed by one or more legs to retrieve material such as calculi. At least one of the legs has at least an inner and an outer surface. The outer surface is an atraumatic surface such as a curved surface. The atraumatic surface can include one or more radii. The inner surface can be flat such that the leg has a D-shaped cross section. Other shapes are possible for the inner surface including a pointed shape that enhances the basket's stone crushing or breaking ability. The inner surface, whatever its shape, can have a rough surface (e.g., serrated, etched, toothed, etc.) for further enhancing the basket's ability to capture stones and other calculi.
Claims37
A medical retrieval device, comprising:
- a proximal handle;
- a sheath including a proximal portion, a distal end, and a lumen, the sheath extending distally from the handle;
- and
- a basket, the basket and the sheath moveable relative to each other to achieve a retracted position in which the basket is collapsed within the lumen of the sheath, and a deployed position in which the basket extends from the distal end of the sheath, the basket comprising at least three wires, the wires joined at a distal end of the basket for capturing material when in the deployed position, and for holding material when the basket is at least partially collapsed in the sheath, at least one of the wires comprising an inner surface and a curved outer surface, wherein a cross-section of the at least one wire is substantially trapezoidal, and wherein the basket is non-helix shaped.
A medical retrieval device, comprising:
- a proximal handle;
- a sheath including a proximal portion, a distal end, and a lumen, the sheath extending distally from the handle;
- and
- a basket, the basket and the sheath moveable relative to each other to achieve a retracted position in which the basket is collapsed within the lumen of the sheath, and a deployed position in which the basket extends from the distal end of the sheath, the basket comprising at least three wires, the wires joined at a distal end of the basket for capturing material when in the deployed position, and for holding material when the basket is at least partially collapsed in the sheath, at least one of the wires comprising an inner surface and a curved outer surface, wherein the inner surface comprises at least one prong, and wherein the basket is non-helix shaped.
A medical retrieval device, comprising:
- a proximal handle;
- a sheath including a proximal portion, a distal end, and a lumen, the sheath extending distally from the handle;
- and
- a basket, the basket and the sheath moveable relative to each other to achieve a retracted position in which the basket is collapsed within the lumen of the sheath, and a deployed position in which the basket extends from the distal end of the sheath, the basket comprising at least three wires, the wires joined at a distal end of the basket for capturing material when in the deployed position, and for holding material when the basket is at least partially collapsed in the sheath, at least one of the wires comprising an inner surface and a curved outer surface, wherein a cross-section of the at least one wire is substantially trapezoidal, and wherein each of the at least three wires extends substantially in a plane in the deployed position.
A medical retrieval device, comprising:
- a proximal handle;
- a sheath including a proximal portion, a distal end, and a lumen, the sheath extending distally from the handle;
- and
- a basket, the basket and the sheath moveable relative to each other to achieve a retracted position in which the basket is collapsed within the lumen of the sheath, and a deployed position in which the basket extends from the distal end of the sheath, the basket comprising at least three wires, the wires joined at a distal end of the basket for capturing material when in the deployed position, and for holding material when the basket is at least partially collapsed in the sheath, at least one of the wires comprising an inner surface and a curved outer surface, wherein the inner surface comprises at least one prong, and wherein each of the at least three wires extends substantially in a plane in the deployed position.
Dependencies are inferred from the claim text.