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1. (WO1980000007) MEDICAL SLEEVE
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WHAT IS CLAIMED IS:

1. A medical device for treatment of body disorders, comprising a tubular sleeve adapted to isolate the inner walls of a hollow body vessel from material flowing into the vessel, said sleeve being formed of a material which is impervious, nontoxic, and resistant to attack by anticipated body chemicals and medicines, said sleeve being sufficiently flexible to be folded on itself to thereby reduce its bulk from a normal configuration to a compacted configuration to facilitate initial placement of the sleeve into the body vessel.

2. A medical device as set forth in claim 1, wherein said sleeve includes means for remotely controlling transition of said sleeve from said compacted configuration to said normal configuration.

3. A medical device for the treatment of body disorders comprising a tubular sleeve adapted to isolate the inner walls of a hollow body vessel from material flowing into the vessel, said sleeve being formed of a material which is impervious, nontoxic, and resistant to attack by anticipated body chemicals and medicines, said sleeve being formed of a relatively flexible sheath having at least one circumferential stiffening rib thereon, said circumferential stiffening rib being adapted to hold said sleeve in fluid-tight engagement with the interior walls of the body vessel.

4. A medical device as set forth in claim 3, wherein said circumferential stiffening tube is inflatable to control its stiffness.

5. A medical device as set forth in claim 4, wherein said rib is a hollow, torroidal ring, at least one trailing tube having a lumen in communication with the hollow interior of said rib to permit remote inflation of said rib.

6. A medical device as set forth in claim 5, including means for anchoring said sleeve in said vessel at a point in a body remote from said sleeve.

7. A medical device for treatment of body disorders comprising a tubular sleeve adapted to isolate the interior walls of a hollow body vessel from material flowing into the vessel, said sleeve being formed of material which is impervious, nontoxic, and resistant to attack by anticipated body chemicals and medicines, said sleeve being sufficiently flexible to be folded on itself to reduce its bulk for implantation in said vessel through a natural body lumen leading to the site of said interior vessel walls, at least one ring balloon extending circumferentially on said sheath, said ring balloon having the configuration of a hollow torroid and being inflatable to radially extend said sheath, elongated hollow filament means connected to said sheath, a lumen in said filament means being in communication with the interior of said ring balloon to permit said ring balloon to be pressurized from a point remote from said sleeve.

8. A medical device as set forth in claim 7, wherein said sleeve includes a hollow filament portion extending axially along the sleeve, said filament portion being adapted to be remotely pressurized and, upon pressurization, being arranged to axially extend said sleeve.

9. A medical device as set forth in claim 7, wherein said sleeve includes a ring balloon adjacent each end thereof, said ring balloons being inflatable through said hollow filament means to seal each end of said sleeve to the interior walls of said body vessel to thereby define an annular zone between said sleeve and the interior walls of said body vessel.

10. A medical device as set forth in claim 7, wherein said sleeve is provided with generally radial passage means therethrough, and means including an elongated lumen connected to said passage means to provide communication between an annular zone between said sleeve and said body vessel and a point remote from said sleeve.

11. A medical device as set forth in claim 10, wherein said passage means is arranged to form a reaction jet when fluid is pumped through said elongated lumen to position said sleeve in said body vessel.

12. A medical device as set forth in claim 7, including a dialator shell having a cavity for receiving the sleeve when it is in a folded condition and having a rounded forward end portion for facilitating movement thereof throug said body vessel.

13. A medical device as set forth in claim 12, wherein said shell is arranged to be ejected from said sleev when said filament means is pressurized and said sleeve is expanded by said ring balloon.

14. _A method of isolating a hallow body vessel fro fluid passing into it, comprising the steps of passing an impervious sheath axially into the vessel through its natura lumen, aligning an end opening of the sheath axially with an upstream end of the zone of the- vessel sought to be isolated and expanding said open end radially into circumferential sealing engagement with the interior walls of the body vesse

15. A method as set forth in claim 14, wherein sai sheath is expanded into sealing engagement with the interior walls of said vessel by means remote from said zone, said remote expanding means being in communication with said sheath through a natural body lumen connected with said vessel.

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16. A method as set forth in claim 15, wherein said sleeve is provided with inflatable means operative upon inflation to expand said sheath into sealing engagement with the walls of said vessel, and inflating said inflatable means through an artificial lumen extending through said natural body lumen to said remote means.

17. A method as set forth in claim 16, wherein said inflatable means is arranged circumferentially about said sheath such that inflation thereof causes radial extension of said sheath.

18. A method as set forth in claim 17, wherein said inflatable means is arranged axially of said sheath such that inflation thereof causes axial extension of said sheath.

19. A method of controlling obesity, comprising the steps of positioning a sleeve impervious to digestive juices and normal foods in the digestive tract, arranging the sleeve in the digestive tract in such a manner that food material passing through the digestive tract is caused to pass through the sleeve while being isolated from direct contact with the surrounding area of the interior walls of the digestive tract and body fluids secreted by such surrounding area interior walls such that natural absorption of food material in the digestive tract is impaired and a net caloric intake for a given quantity of ingested food is thereby reduced.

20. A method as set forth in claim 19, wherein sa sleeve is disposed in the stomach.

21. A method as set forth in claim 19, wherein sa sleeve is anchored in position in said digestive tract by means extending through the digestive tract to the oral cavity.

22. A method as set forth in claim 19, wherein sa sleeve is positioned in said digestive tract through the or cavity.

23. A method as set forth in claim 22, wherein sa sleeve is passed through the oral cavity and other upper areas of the digestive tract in a compacted condition and i expanded into sealing contact with at least a portion of sa surrounding area of said interior walls.