Medical retrieval device

Details Medical retrieval device Medical retrieval device

1999-12-22

2004-10-05

Truong, Kevin (Department: 3731)

Surgery

Instruments

Means for concretion removal

C606S200000

Reexamination Certificate

active

06800080

ABSTRACT:

TECHNICAL FIELD
The present invention deals with a retrieval device for removing material from a body.
BACKGROUND INFORMATION
Biological material, such as stones, can reside at least in the kidney, ureter, or biliary duct. Stones can be extremely painful and require medical treatment. Removal of stones from the body has been accomplished by two methods in the past. The first method is stone removal through conventional surgery; a treatment with obvious disadvantages, risks and drawbacks. The second method is to remove stones under the guidance of an endoscope. In this method a grasping device is guided through the body tract to the site of the stone and is used to grasp and remove the stone under endoscopic guidance. Grasping devices which have been used in the past for the removal of stones include basket devices that have generally straight legs that bow outward from the center of the basket.
SUMMARY OF THE INVENTION
The invention provides a device and method for retrieval of material from a body. More particularly, the invention relates to a device and method for immobilizing a stone in the body with a basket of the device so the stone can be effectively fragmented and then allowing the stone and/or the pieces thereof to be removed via the basket which is formed, pursuant to the invention, of multiple, spiral-shaped, generally parallel, non-overlapping, and non-intersecting legs that are flexible and relatively closely spaced to each other (e.g., no more than about 2 mm apart).
The retrieval device of the invention includes the basket, a sheath movable relative to the basket, and a handle. The basket has spiral-shaped legs disposed around a central axis. The spiral-shaped legs have improved flexibility and moveability. In an intermediate section of the basket, the spiral-shaped legs are disposed substantially parallel to one another around the central axis. The legs do not intersect. Intersecting legs tend to restrain basket leg flexibility.
In one aspect, the invention relates to a device for retrieving material from a body. The device includes a sheath having a lumen extending therethrough and having a distal end. The device also includes a basket movable relative to the sheath from a retracted position in which the basket is withdrawn within the lumen of the sheath and an expanded position in which the basket is extended beyond the distal end of the sheath and open. The basket comprises a first portion and a second portion with two or more legs extending from the first portion to the second portion. The basket further comprises an intermediate portion between the first and second portions in which the legs are, when the basket is expanded, spirally arranged, substantially parallel, and non-intersecting. The intermediate portion of the basket is displaced radially outward relative to the first and second portions when the basket is in the expanded position. When in the expanded position, the basket can provide a support surface for the material when it is being fragmented, and it can further be used to capture the fragmented material.
Embodiments of this aspect of the invention can include the following features. For example, in one embodiment the legs of the intermediate portion of the basket may be spaced about 0.0787 inches to 0.394 inches apart. In another embodiment, an elongate member may extend within the lumen of the sheath and may be operably attached to the basket such that movement of the elongate member relative to the sheath results in the basket moving between the expanded and retracted positions.
In another aspect, the invention features a method for fragmenting and retrieving material (e.g., a stone) from a body tract This method involves inserting into a body tract a device such as the device described above. The method further includes immobilizing material in the body tract by moving the basket from the retracted position to the expanded position whereby the material is blocked, and then fragmenting the material in the body tract while using the expanded basket to limit movement of the material during fragmentation. The expanded basket can then be manipulated to capture at least some of the fragmented material within the basket. The captured fragmented material is then recovered from the body by withdrawing the device from the body tract


REFERENCES:
patent: 2556783 (1951-06-01), Wallace
patent: 2943626 (1960-07-01), Dormia
patent: 3137298 (1964-06-01), Glassman
patent: 3472230 (1969-10-01), Fogarty
patent: 3828790 (1974-08-01), Curtiss et al.
patent: 3955578 (1976-05-01), Chamness et al.
patent: 3996938 (1976-12-01), Clark, III
patent: 4046150 (1977-09-01), Schwartz et al.
patent: 4198960 (1980-04-01), Utsugi
patent: 4243040 (1981-01-01), Beecher
patent: 4299225 (1981-11-01), Glassman
patent: 4326530 (1982-04-01), Fleury, Jr.
patent: 4347846 (1982-09-01), Dormia
patent: 4425908 (1984-01-01), Simon
patent: 4447227 (1984-05-01), Kotsanis
patent: 4557255 (1985-12-01), Goodman
patent: 4590938 (1986-05-01), Segura et al.
patent: 4611594 (1986-09-01), Grayhack et al.
patent: 4612931 (1986-09-01), Dormia
patent: 4625726 (1986-12-01), Duthoy
patent: 4650466 (1987-03-01), Luther
patent: 4682599 (1987-07-01), Konomura
patent: 4691705 (1987-09-01), Okada
patent: 4699147 (1987-10-01), Chilson et al.
patent: 4706671 (1987-11-01), Weinrib
patent: 4718419 (1988-01-01), Okada
patent: 4723549 (1988-02-01), Wholey et al.
patent: 4728319 (1988-03-01), Masch
patent: 4790812 (1988-12-01), Hawkins, Jr. et al.
patent: 4790813 (1988-12-01), Kensey
patent: 4794928 (1989-01-01), Kletschka
patent: 4807626 (1989-02-01), McGirr
patent: 4873978 (1989-10-01), Ginsburg
patent: 4885003 (1989-12-01), Hillstead
patent: 4893621 (1990-01-01), Heyman
patent: 4907572 (1990-03-01), Borodulin et al.
patent: 4926858 (1990-05-01), Gifford, III et al.
patent: 4927426 (1990-05-01), Dretler
patent: 4927427 (1990-05-01), Kriauciunas et al.
patent: 4960108 (1990-10-01), Reichel et al.
patent: 4994079 (1991-02-01), Genese et al.
patent: 4997435 (1991-03-01), Demeter
patent: 4998539 (1991-03-01), Delsanti
patent: 5011488 (1991-04-01), Ginsburg
patent: 5030201 (1991-07-01), Palestrant
patent: 5041093 (1991-08-01), Chu
patent: 5053008 (1991-10-01), Bajaj
patent: 5057114 (1991-10-01), Wittich et al.
patent: 5064428 (1991-11-01), Cope et al.
patent: 5071407 (1991-12-01), Termin et al.
patent: 5084054 (1992-01-01), Bencini et al.
patent: 5100423 (1992-03-01), Fearnot
patent: 5102415 (1992-04-01), Guenther et al.
patent: 5171233 (1992-12-01), Amplatz et al.
patent: 5176688 (1993-01-01), Narayan et al.
patent: 5192286 (1993-03-01), Phan et al.
patent: 5246447 (1993-09-01), Rosen et al.
patent: 5290294 (1994-03-01), Cox et al.
patent: 5311858 (1994-05-01), Adair
patent: 5329942 (1994-07-01), Gunther et al.
patent: 5330482 (1994-07-01), Gibbs et al.
patent: 5345936 (1994-09-01), Pomeranz et al.
patent: 5354310 (1994-10-01), Garnic et al.
patent: 5376100 (1994-12-01), Lefebvre
patent: 5380273 (1995-01-01), Dubrul et al.
patent: 5421832 (1995-06-01), Lefebvre
patent: 5441516 (1995-08-01), Wang et al.
patent: 5496330 (1996-03-01), Bates et al.
patent: 5499981 (1996-03-01), Kordis
patent: 5549626 (1996-08-01), Miller et al.
patent: 5562678 (1996-10-01), Booker
patent: 5658296 (1997-08-01), Bates et al.
patent: 5693069 (1997-12-01), Shallman
patent: 5713848 (1998-02-01), Dubrul et al.
patent: 5814064 (1998-09-01), Daniel et al.
patent: 5928260 (1999-07-01), Chin et al.
patent: 5935139 (1999-08-01), Bates
patent: 6096053 (2000-08-01), Bates
patent: 6174318 (2001-01-01), Bates et al.
patent: 6248113 (2001-06-01), Fina
patent: 6277084 (2001-08-01), Abele et al.
patent: 56865/86 (1986-04-01), None
patent: 2804058 (1978-08-01), None
patent: 2821048 (1979-11-01), None
patent: 3213223 (1983-10-01), None
patent: 3407708 (1985-09-01), None
patent: 3522649 (1986-01-01), None
patent: 3620385 (1988-01-01), None
patent: 3633527 (1988-04-01), None
patent: 4025799 (1992-02-01), None
patent: 32 13 223 (1993-10-01), None
patent: 0 195 444 (1986-09-01), None
patent: 0 428 998 (1991-05-01), None
patent: 0 737 450 (1996-10-01), None

Affiliated with

Also associated with

Rating

Medical retrieval device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Medical retrieval device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medical retrieval device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3266664