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1. WO1997041924 - APPLICATEUR INTRA-UTERIN A TRAVERS LE COL POUR HYPERTHERMIE INTRA-UTERINE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

WHAT IS CLAIMED IS:
1 A method for thermally treating body tissue, comprising the steps of inserting an applicator having an antenna into a body cavity,
applying electromagnetic energy to the antenna at a power level and for a time interval sufficient to cause ablation of the tissue of the body cavity, and
producing a transmitted electromagnetic radiation pattern by said antenna having a shape generally the same as the shape of the body cavity

2 The method of Claim 1, further including thermally heating endometrial tissue of a uterine cavity sufficient to cause irreversible cell damage

3 The method of Claim 2, further including conforming the uterine cavity to a pear shape, and ablating a desired thickness of the endometrium tissue

4 The method of Claim 1, further including expanding a portion of the applicator so as to force the tissue of the body cavity to conform to a specified shape

5 The method of Claim 1, further including uniformly ablating the tissue surrounding the surface of said body cavity

6 The method of Claim 1, further including uniformly ablating a predefined thickness of said tissue, as measured outwardly from the surface of the body cavity

7 The method of Claim 4, further including expanding the applicator to conform the body cavity to a pear shape

8 The method of Claim 4, further including stretching convoluted body tissue for conformance to said specified shape 9 The method of Claim 4, further including compressing the body tissue and reducing blood flow therein, thereby reducing thermal dissipation caused by the flow of blood in said tissue.

10 The method of Claim 4, further including expanding the applicator by inflating a balloon catheter so that the balloon forces the body cavity to said specified shape

11 The method of Claim 10, further including moving said antenna so as to be shaped in conformance with at least a portion of said specified shape

12 The method of Claim 10, further including expanding said balloon catheter so as to produce an irregular shape similar to an irregular shape of a body cavity

13 The method of Claim 1, further including a plurality of antennas, and positionally arranging said antennas to achieve a desired radiation pattern

14 The method of Claim 1 , further including thermally treating body tissues of non-uniform thickness by causing a higher density of energy to be induced into the thicker tissue and a lower density of energy to be induced into the thinner tissue.

15 The method of Claim 1 , further including using an applicator having an antenna curved over a tip thereof so as to provide radiation axially from the tip of said antenna 16 A method for ablating endometrial tissue of a uterine cavity, comprising the steps of
inserting a balloon catheter having at least one antenna therein into the uterine cavity, and
applying electrical energy to said antenna so as to produce an electromagnetic radiation for treating the endometrial tissue of the uterine cavity, said radiation pattern being generally pear-shaped.

17. The method of Claim 16, further including expanding a balloon catheter housing said antenna so as to enlarge the uterine cavity and maximize contact between the balloon catheter and the uterine tissue

18 The method of Claim 17, further including expanding the balloon catheter so that the isotherms more uniformly heat the cornus portions of the uterus

19 The method of Claim 16, further including conforming the shape of the antenna to at least a portion of said pear shape

20. An applicator for generating electromagnetic energy and insertable into a body cavity for treatment of body tissues, comprising:
a catheter body having a portion thereof that is expandable when pressure is applied thereto, said catheter body having at least one lumen constructed therein, said lumen extending into said expandable portion of the catheter body; and
an antenna supported by the catheter lumen, whereby when said catheter body is expanded, the tissue of the body cavity and the applicator are forced to conforming shapes, and the antenna conforms to the shape of the body tissue in contact with the applicator.

21 The applicator of Claim 20, wherein said catheter body includes a channel that can be filled with a fluid so that a pressure thereof on the catheter body portion causes an expansion thereof.

22. The applicator of Claim 20, wherein the expandable portion of said catheter body expands to a shape that conforms to the cavity of a human female uterus

23 The applicator of Claim 20, further including a plurality of antennas insertable within respective lumens of said catheter

24. The applicator of Claim 20, further including means for circulating a cooling liquid through said applicator.

25 The applicator of Claim 20, further including means for mechanically expanding a balloon portion of said catheter

26 The applicator of Claim 20, wherein said antenna comprises a helical coil formed in a curve over a distal tip of said catheter.

AMENDED CLAIMS
[received by the International Bureau on 25 September 1997 (25.09.97) ;
original claims 1 -26 replaced by amended claims 1 -21 (4 pages ) ]

1. A method for thermally treating body tissue, comprising the steps of:
inserting a catheter portion of an applicator having an antenna into a body cavity;
expanding in the body cavity a noncompliant angioplasty type balloon to a fixed shape to conform the body cavity to said fixed shape;
applying electromagnetic energy to the antenna at a power level and for a time interval sufficient to cause ablation of the tissue of the body cavity; and
producing a transmitted electromagnetic radiation pattern by said antenna having a shape generally the same as the fixed shape of the expanded angioplasty type balloon.

2. The method of Claim 1 further including conforming a uterine cavity to a pear shape with said angioplasty type balloon, and ablating a desired thickness of the endometrium tissue.

3. The method of Claim 1, further including expanding a portion of the applicator so as to force the tissue of the body cavity to conform to a specified shape.

4. The method of Claim 3, further including compressing the body tissue and reducing blood flow therein, thereby reducing thermal dissipation caused by the flow of blood in said tissue.

5. The method of Claim 3, further including expanding the applicator by inflating a balloon catheter so that the balloon forces the body cavity to said specified shape, and physically deforming said antenna during the inflation of the balloon so that said antenna is shaped in conformance with at least a portion of said specified shape.

6. The method of Claim 5, further including expanding said balloon catheter so as to produce an irregular shape similar to an irregular shape of a body cavity.

7. The method of Claim 1, further including a plurality of antennas, and positionally arranging said antennas to achieve a desired radiation pattern.

8. The method of Claim 1 , further including thermally treating body tissues of non-uniform thickness by causing a higher density of energy to be induced into the thicker tissue and a lower density of energy to be induced into the thinner tissue.

9. The method of Claim 8, further including treating non-uniform thicknesses of body tissue by offsetting an axial axis of the antenna with respect to an axis of the balloon.

10. The method of Claim 1 , further including using an applicator having an antenna curved over a tip thereof so as to provide radiation axially from the tip of said antenna.

11. A method for ablating endometrial tissue of a uterine cavity, comprising the steps of:
inserting a balloon catheter having at least one antenna therein into the uterine cavity; and
applying electrical energy to said antenna so as to produce an electromagnetic radiation for treating the endometrial tissue of the uterine cavity, said antenna being configured so that said radiation pattern is generally an inverted pear shape.

12. The method of Claim 11, further including expanding an angioplasty type of balloon catheter to enlarge the uterine cavity and move the cornus portions thereof toward each other and closer to said antenna.

13. The method of Claim 12, further including moving the cornus portions so that the isotherms more uniformly heat the cornus portions of the uterus.

14. The method of Claim 1 1 , further including conforming the physical shape of the antenna to at least a portion of said pear shape.

15. An applicator for generating electromagnetic energy and insertable into a body cavity for treatment of body tissues, comprising:
a catheter having a portion thereof that is expandable when pressure is applied thereto, a body portion of said catheter having at least one lumen constructed therein, said lumen extending into said expandable portion of the catheter; and
an antenna supported by the catheter lumen, whereby when said catheter portion is expanded, the tissue of the body cavity and the expandable portion of the catheter are forced to conforming shapes, and the physical shape of the antenna conforms to the shape of the body tissue in contact with the expandable portion of the catheter.

16. The applicator of Claim 15, wherein said catheter includes a cavity that can be filled with a fluid so that a pressure thereof causes an expansion of the expandable portion.

17. The applicator of Claim 15, wherein the expandable portion of said catheter expands to a predefined shape that is independent of the shape of the body cavity.

18. The applicator of Claim 15, further including a plurality of antennas insertable within respective lumens formed in said catheter body.

19. The applicator of Claim 15, further including means for circulating a cooling liquid through said applicator.

20. The applicator of Claim 15, further including means for mechanically expanding a balloon portion of said catheter.

21. The applicator of Claim 15, wherein said antenna comprises a helical coil formed in a curve around a distal tip of said catheter expandable portion.