Methods for advancing a device through a gastrointestinal tract

1. A method of advancing a device through a gastrointestinal tract, comprising:

inserting a device comprising first and second vacuum ports into the gastrointestinal tract;

advancing the first vacuum port distally through the gastrointestinal tract away from the second vacuum port;

sliding the second vacuum port towards the first vacuum port while the first vacuum port is applying suction;

preventing tissue from moving distally past the first vacuum port by radially expanding a blocker that is positioned proximal to the first vacuum port;

activating vacuum through the second vacuum port to suction tissue of the gastrointestinal tract to the second vacuum port;

releasing vacuum on the first vacuum port and advancing the first vacuum port distally through the gastrointestinal tract along a desired distance while the vacuum is activated through the second vacuum port; and

repeating the steps of sliding the second vacuum port, preventing tissue from moving distally, activating the vacuum through the second vacuum port, releasing vacuum on the first vacuum port and advancing the first vacuum port distally to incrementally move the device through the gastrointestinal tract.

2. The method of claim 1 , further comprising sliding the blocker over the second vacuum port before activating vacuum through the second vacuum port.

3. The method of claim 1 , wherein the blocker comprises a balloon.

4. The method of claim 1 , further comprising expanding the blocker.

5. The method of claim 4 , further comprising keeping the blocker expanded during all of the advancing, sliding, moving, and activating, steps.

6. The method of claim 1 , further comprising repeating the steps of sliding, preventing, activating, releasing and advancing the first vacuum port distally through the gastrointestinal tract while the vacuum is activated through the second vacuum port.

7. The method of claim 6 , further comprising repeating the steps until the device is entirely through a small intestine of the gastrointestinal tract.

8. The method of claim 1 , further comprising inserting a scope into the device to advance the scope through the gastrointestinal tract as the device advances through the gastrointestinal tract.

9. A method of advancing a device through a gastrointestinal tract, comprising:

inserting a device having a first tissue grabbing mechanism distal to a second tissue grabbing mechanism into the gastrointestinal tract;

activating the first tissue grabbing mechanism to grab tissue of the gastrointestinal tract;

moving the second tissue grabbing mechanism towards the first tissue grabbling mechanism;

preventing tissue from moving distally past the first tissue grabbing member by maintaining a radially expandable blocker that is positioned proximal to the first tissue grabbing member in an expanded configuration during the moving step;

activating the second tissue grabbing mechanism to grab tissue of the gastrointestinal tract;

deactivating the first tissue grabbing mechanism; and

advancing the first tissue grabbing mechanism distally while the second tissue grabbing mechanism is activated; and

repeating the steps of activating the first tissue grabbing member, moving the second tissue grabbing member, preventing tissue from moving distally, activating the second tissue grabbing mechanism, deactivating the first tissue grabbing mechanism and advancing the first tissue grabbing mechanism to incrementally move the device through the gastrointestinal tract.

10. The method of claim 9 , wherein at least one of the first and second tissue grabbing mechanisms is a vacuum port.

11. The method of claim 9 , further comprising sliding the blocker over the second tissue grabbing mechanism before activating the second tissue grabbing mechanism.

12. The method of claim 11 , wherein sliding the blocker over the second tissue grabbing mechanism urges pleated tissue of the gastrointestinal tract proximally over the second tissue grabbing mechanism.

13. The method of claim 9 , wherein the blocker comprises a balloon.

14. The method of claim 9 , further comprising expanding the blocker.

15. The method of claim 14 , further comprising keeping the tissue blocker expanded during all of the steps of activating the first tissue grabbing mechanism, moving the second tissue grabbing mechanism, activating the second tissue grabbing mechanism, deactivating the first tissue grabbing mechanism, and advancing the first tissue grabbing mechanism distally.

16. The method of claim 9 , further comprising deactivating the second tissue grabbing mechanism after advancing the first tissue grabbing mechanism distally.

17. The method of claim 9 , further comprising repeating the steps until the device is entirely through a small intestine of the gastrointestinal tract.

18. The method of claim 9 , further comprising inserting a scope into the device to advance the scope through the gastrointestinal tract as the device advances through the gastrointestinal tract.

19. A method of advancing a device through a gastrointestinal tract, comprising:

inserting a device having a first tissue grabbing mechanism and a second tissue grabbing mechanism into the gastrointestinal tract;

activating the first tissue grabbing mechanism to grab tissue of the gastrointestinal tract;

moving the first and second tissue grabbing mechanisms towards each other to create pleats of tissue therebetween;

preventing the pleats of tissue from moving distal to a portion of the first tissue grabbing mechanism;

activating the second tissue grabbing mechanism to grab tissue of the gastrointestinal tract that is distal to substantially all of the pleats of tissue;

advancing the first tissue grabbing mechanism distally while the second tissue grabbing mechanism is activated; and

repeating the steps of activating the first tissue grabbing member, moving the first and second tissue grabbing members, preventing the pleats of tissue from moving distal to the portion of the first tissue grabbing mechanism, activating the second tissue grabbing mechanism, and advancing the first tissue grabbing mechanism to incrementally move the device through the gastrointestinal tract.

20. The method of claim 19 , wherein at least one of the tissue grabbing mechanisms is a vacuum port.

21. The method of claim 19 , further comprising moving tissue proximally past the second tissue grabbing mechanism using a radially expandable blocker that is positioned proximal to the first tissue grabbing mechanism.

22. The method of claim 21 , further comprising sliding the radial expandable blocker over the second tissue grabbing mechanism before activating the second tissue grabbing mechanism.

23. The method of claim 22 , wherein sliding the radially expandable blocker over the second tissue grabbing mechanism urges pleated tissue of the gastrointestinal tract proximally over and with respect to the second tissue grabbing mechanism.

24. The method of claim 21 , wherein the radially expandable blocker comprises a balloon.

25. The method of claim 21 , further comprising expanding the radial expandable blocker.

26. The method of claim 25 , further comprising keeping the radial expandable blocker expanded throughout all of the steps of activating the first tissue grabbing mechanism, moving the first and second tissue grabbing mechanisms, moving the pleats of tissue, activating the second tissue grabbing mechanism, and advancing the first tissue grabbing mechanism.

27. The method of claim 19 , further comprising repeating the steps until the device is entirely through a small intestine of the gastrointestinal tract.

28. The method of claim 19 , further comprising inserting a scope into the device to advance the scope through the gastrointestinal tract as the device advances through the gastrointestinal tract.

29. The method of claim 19 , wherein moving the pleats of tissue proximal to a portion of the second tissue grabbing mechanism comprises sliding a cover over the second tissue grabbing mechanism.