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A medical device, and related method, for manipulating material, such as calculi, within a patient's body includes a handle, a sheath, a retrieval basket, and a retainer coupled to the distal end of the retrieval basket. The retrieval basket includes a plurality of legs, each of which includes an in

A medical device, and related method, for manipulating material, such as calculi, within a patient's body includes a handle, a sheath, a retrieval basket, and a retainer coupled to the distal end of the retrieval basket. The retrieval basket includes a plurality of legs, each of which includes an intermediate portion located at the distal end of the retrieval basket. The retainer secures at least the intermediate portion of one of the plurality of legs to the intermediate portion of another of the plurality of legs.

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What is claimed is: 1. A medical device, comprising: a handle; a sheath joined to the handle, the sheath comprising a lumen; a retrieval basket comprising a proximal end, a distal end, and a plurality of legs, each of the plurality of legs being a continuous loop from a first end to a second end an

What is claimed is: 1. A medical device, comprising: a handle; a sheath joined to the handle, the sheath comprising a lumen; a retrieval basket comprising a proximal end, a distal end, and a plurality of legs, each of the plurality of legs being a continuous loop from a first end to a second end and having an intermediate portion, wherein the first and second ends of the plurality of legs are located at the proximal end of the retrieval basket and the intermediate portion of each of the plurality of legs is located between the first and second ends of the leg, the intermediate portion being positioned at the distal end of the retrieval basket, the retrieval basket achieving a collapsed position when restrained in the lumen of the sheath and an expanded position when unrestrained by the lumen of the sheath; and a retainer coupled to the distal end of the retrieval basket to secure at least the intermediate portion of one of the plurality of legs to the intermediate portion of another of the plurality of legs, wherein the intermediate portion of each of the plurality of legs includes a notch, wherein at least the intermediate portion of one of the plurality of legs crosses over the intermediate portion of another of the plurality of legs within the retainer, wherein the retainer comprises a plurality of tubes having a substantially constant outer diameter and each defining a hollow passageway, wherein an inner surface of each hollow passageway attaches to the notch of a corresponding one of the plurality of legs, and wherein the hollow passageway of one of the plurality of tubes intersects the hollow passageway of another of the plurality of tubes. 2. The medical device of claim 1 wherein the retainer is X-shaped. 3. The medical device of claim 1 wherein each of the plurality of tubes comprises a first end, and a second end, and the hollow passageway extends from the first end to the second end. 4. The medical device of claim 3 wherein at least the hollow passageway of one of the plurality of tubes is in fluid communication with the hollow passageway of another of the plurality of tubes. 5. The medical device of claim 3 wherein the plurality of tubes comprise heat shrink material. 6. The medical device of claim 1 wherein each tube is substantially perpendicular to at least one other tube. 7. The medical device of claim 1 wherein each of the plurality of tubes of the retainer extends along a length of the legs substantially to a proximal end of the retrieval basket. 8. A method of retrieving a material from a body, comprising: inserting a medical device into the body, the medical device comprising: a handle; a sheath joined to the handle, the sheath comprising a lumen; a retrieval basket comprising a proximal end, a distal end, and a plurality of legs, each of the plurality of legs being a continuous loop from a first end to a second end and having an intermediate portion, wherein the first and second ends of the plurality of legs are located at the proximal end of the retrieval basket and the intermediate portion of each of the plurality of legs is located between the first and second ends of the leg, the intermediate portion being positioned at the distal end of the retrieval basket, the retrieval basket achieving a collapsed position when restrained in the lumen of the sheath and an expanded position when unrestrained by the lumen of the sheath; and a retainer coupled to the distal end of the retrieval basket to secure at least the intermediate portion of one of the plurality of legs to the intermediate portion of another of the plurality of legs, wherein the intermediate portion of each of the legs includes a notch, wherein at least the intermediate portion of one of the plurality of legs crosses over the intermediate portion of another of the plurality of legs within the retainer, wherein the retainer comprises a plurality of tubes having a substantially constant outer diameter and each defining a hollow passageway, wherein an inner surface of each hollow passageway attaches to the notch of a corresponding one of the plurality of legs, and wherein the hollow passageway of one of the plurality of tubes intersects the hollow passageway of another of the plurality of tubes; positioning the retrieval basket proximate to the material to be retrieved with the retrieval basket in the expanded position; capturing the material with the retrieval basket; and withdrawing the retrieval basket from the body to remove the captured material from the body. 9. The method of claim 8 wherein each tube is substantially perpendicular to at least one other tube. 10. The method of claim 8 wherein each of the plurality of tubes of the retainer extends along a length of the legs substantially to a proximal end of the retrieval basket. 11. A medical device, comprising: a handle; a sheath joined to the handle, the sheath comprising a lumen; a retrieval basket comprising a proximal end, a distal end, and a plurality of legs, each of the plurality of legs being a continuous loop from a first end to a second end and having an intermediate portion, wherein the first and second ends of the plurality of legs are located at the proximal end of the retrieval basket and the intermediate portion of each of the plurality of legs is located between the first and second ends of the leg, the intermediate portion being positioned at the distal end of the retrieval basket, the retrieval basket achieving a collapsed position when restrained in the lumen of the sheath and an expanded position when unrestrained by the lumen of the sheath; and a retainer including a plurality of tubes and coupled to the distal end of the retrieval basket to secure at least the intermediate portion of one of the plurality of legs to the intermediate portion of another of the plurality of legs, wherein at least the intermediate portion of one of the plurality of legs crosses over the intermediate portion of another of the plurality of legs within the retainer, wherein the intermediate portion of the one of the plurality of legs comprises a connecting surface modified relative to adjacent surfaces of the intermediate portion of the one of the plurality of legs, wherein the connecting surface comprises at least one notch; wherein an inner surface of each of the plurality of tubes attaches to the connecting surface of a corresponding one of the plurality of legs, and wherein each of the plurality of tubes of the retainer includes a substantially constant outer diameter. 12. The medical device of claim 11 wherein each of the plurality of tubes defines a hollow passageway. 13. The medical device of claim 12 wherein the hollow passageway of one of the plurality of tubes intersects the hollow passageway of another of the plurality of tubes. 14. The medical device of claim 12 wherein at least the hollow passageway of one of the plurality of tubes is in fluid communication with the hollow passageway of another of the plurality of tubes. 15. The medical device of claim 12 wherein the plurality of tubes comprises heat shrink material. 16. The medical device of claim 11 wherein each tube is substantially perpendicular to at least one other tube. 17. The medical device of claim 11 wherein each of the plurality of tubes of the retainer extends along a length of the legs substantially to a proximal end of the retrieval basket.