Method for permanent occlusion of fallopian tube

1. A method of contraception, comprising:

delivering into a fallopian tube a bioabsorbable implant having an implant body comprising a plurality of biodegradable fibers which have a crimped configuration when in an unstressed condition, each of the fibers extending from a proximal end of the implant body to a distal end thereof, the fibers being joined at least one of the proximal end and the distal end of the implant body and being loosely arranged, non-knit and non-woven between the proximal end and the distal end;

shortening the implant body after delivering the implant body into the fallopian tube wherein shortening the implant body comprises moving at least one of the proximal end and distal end of the implant body toward the other; and

occluding the fallopian tube with the implant;

wherein:

the implant further comprises a string that extends generally longitudinally from a location along the implant body to the proximal end, and proximally from the proximal end;

each of the fibers extends the length of the implant body to the distal end, and is joined to the string at the distal end; and

shortening the implant body comprises pulling the string proximally.

2. A The method of claim 1 , wherein the implant comprises a plurality of loose, bioabsorbable fibers which are radially bulked when in an unstressed condition.

3. The method of claim 2 , wherein the fibers are textured enough in aggregate to span the cross-section of the fallopian tube.

4. The method of claim 1 , wherein the fibers form a radially outermost, tissue-engaging surface of the implant body and the tissue-engaging surface surrounds the implant body.

5. The method of claim 4 , wherein the fibers are thick enough in aggregate to fill the cross-section of the fallopian tube.

6. The method of claim 5 , wherein the fibers extend longitudinally along the implant body, generally parallel to each other.

7. The method of claim 1 , wherein the fibers are joined at one of the distal end and the proximal end of the implant body.

8. The method of claim 7 , wherein the fibers are joined only at one of the distal end and the proximal end of the implant body, and are not joined anywhere else along the length of the implant body.

9. The method of claim 1 , wherein the fibers are joined at least one of the proximal end and the distal end of the implant body and are loosely arranged, non-knit and non-woven between the proximal end and the distal end.

10. The method of claim 1 , wherein shortening the implant body includes making the implant body thicker.

11. The method of claim 1 , wherein shortening the implant body further comprises applying a force against the proximal end of the implant body with the tip of a sheath.

12. The method of claim 1 , wherein delivering the implant comprises delivering the implant from a length of implant material which is significantly longer than the implant body in its post-delivery state.

13. A method of contraception, comprising:

delivering into a fallopian tube a bioabsorbable implant having an implant body comprising a plurality of biodegradable fibers which have a crimped configuration when in an unstressed condition, each of the fibers extending from a proximal end of the implant body to a distal end thereof, the fibers being joined at least one of the proximal end and the distal end of the implant body and being loosely arranged, non-knit and non-woven between the proximal end and the distal end;

shortening the implant body after delivering the implant body into the fallopian tube wherein shortening the implant body comprises moving at least one of the proximal end and distal end of the implant body toward the other; and

occluding the fallopian tube with the implant;

wherein:

the implant further comprises a string that extends generally longitudinally from a location along the implant body to the proximal end, and proximally from the proximal end;

each of the fibers extends the length of the implant body to the distal end, and is joined to the string at the distal end; and

shortening the implant body comprises applying tension to the string to inhibit distal movement of the distal end of the implant body.

14. A method of contraception comprising:

delivering into a fallopian tube an implant having an implant body comprising a plurality of bioabsorbable fibers which have a crimped configuration when in an unstressed condition, the fibers extending from a proximal end of the implant body to a distal end thereof, the fibers forming a radially outermost, tissue-engaging surface of the implant body; and

after delivering, shortening the implant body by moving at least one of the proximal end and distal end of the implant body toward the other;

wherein:

the implant further comprises a string that extends generally longitudinally from a location along the implant body to the proximal end, and proximally from the proximal end;

each of the fibers extends the length of the implant body to the distal end, and is joined to the string at the distal end; and

shortening the implant body comprises pulling the string proximally.

15. The method of claim 14 , wherein shortening the implant body includes making the implant body thicker.

16. The method of claim 14 , further comprising occluding the fallopian tube with the implant.

17. The method of claim 14 , wherein the fibers extend longitudinally along the implant body, generally parallel to each other.

18. The method of claim 14 , wherein the fibers are joined at one of the distal end and the proximal end of the implant body.

19. The method of claim 18 , wherein the fibers a joined only at one of the distal end and the proximal end of the implant body, and are not joined anywhere else along the length of the implant body.

20. The method of claim 14 , wherein the fibers are joined at least one of the proximal end and the distal end of the implant body and are loosely arranged, non-knit and non-woven between the proximal end and the distal end.

21. The method of claim 14 , wherein delivering the implant comprises delivering the implant from a length of implant material which is significantly longer than the implant body in its post-delivery state.

22. The method of claim 14 , wherein the fibers form a radially outermost, tissue-engaging surface of the implant body and the tissue-engaging surface surrounds the implant body.

23. The method of claim 22 , wherein the fibers are thick enough in aggregate to fill the cross-section of the fallopian tube.

24. A method of contraception comprising:

delivering into a fallopian tube an implant having an implant body comprising a plurality of bioabsorbable fibers which have a crimped configuration when in an unstressed condition, the fibers extending from a proximal end of the implant body to a distal end thereof, the fibers forming a radially outermost, tissue-engaging surface of the implant body; and

after delivering, shortening the implant body by moving at least one of the proximal end and distal end of the implant body toward the other;

wherein:

the implant further comprises a string that extends generally longitudinally from a location along the implant body to the proximal end, and proximally from the proximal end;

each of the fibers extends the length of the implant body to the distal end, and is joined to the string at the distal end; and

shortening the implant body comprises applying tension to the string to inhibit distal movement of the distal end of the implant body.

25. The method of claim 24 , wherein shortening the implant body includes making the implant body thicker.

26. The method of claim 24 , further comprising occluding the fallopian tube with the implant.

27. The method of claim 24 , wherein the fibers extend longitudinally along the implant body, generally parallel to each other.

28. The method of claim 24 , wherein the fibers are joined at one of the distal end and the proximal end of the implant body.

29. The method of claim 28 , wherein the fibers a joined only at one of the distal end and the proximal end of the implant body, and are not joined anywhere else along the length of the implant body.

30. The method of claim 24 , wherein the fibers are joined at least one of the proximal end and the distal end of the implant body and are loosely arranged, non-knit and non-woven between the proximal end and the distal end.

31. The method of claim 24 , wherein delivering the implant comprises delivering the implant from a length of implant material which is significantly longer than the implant body in its post-delivery state.

32. The method of claim 24 , wherein the fibers form a radially outermost, tissue-engaging surface of the implant body and the tissue-engaging surface surrounds the implant body.

33. The method of claim 32 , wherein the fibers are thick enough in aggregate to fill the cross-section of the fallopian tube.