System and methods for internalization of external components of adjustable intragastric balloon

1. An apparatus for use in a stomach of a subject, the apparatus comprising:

a balloon adapted for placement in the stomach and having an opening to an interior of the balloon;

an internal tube in the interior of the balloon with a proximal end coupled to the opening of the balloon; and

an inflation tube having a distal end in the interior of the balloon and a proximal end configured to receive a fluid on an exterior of the balloon, the inflation tube being configured to stretch from the stomach to a mouth of the subject to facilitate inflation of the balloon and to have a resting position that is substantially within the interior of the balloon, the internal tube being disposed around at least a portion of the inflation tube that is in the interior of the balloon,

wherein the internal tube has a variable length including a first length that accommodates a substantial portion of the inflation tube when the inflation tube is in the resting position, and a second length, which is shorter than the first length, when the inflation tube is stretched outwardly from the balloon.

2. The apparatus according to claim 1 , wherein a distal end of the internal tube is coupled to the distal end of the inflation tube.

3. The apparatus according to claim 1 , wherein a wall of the internal tube has one or more accordion structures to facilitate the variable length of the internal tube.

4. The apparatus according to claim 1 , further comprising:

a spring coupled to the internal tube, the spring biasing the internal tube to the first length.

5. The apparatus according to claim 1 , wherein the internal tube comprises a plurality of telescoping segments slideably engaged with each other.

6. The apparatus according to claim 1 , further comprising:

a rigid support in the interior of the balloon disposed around, and extending coaxially with, the internal tube.

7. The apparatus according to claim 6 , wherein the distal end of the internal tube is coupled to a distal end of the rigid support via a stretchable tether such that the stretchable tether is stretched when the internal tube is at the second length thereby biasing the internal tube toward the first length.

8. The apparatus according to claim 1 , wherein the inflation tube comprises:

a valve on the proximal end of the inflation tube configured to selectively open and close the inflation tube, and

a removable cap on the proximal end of the inflation tube covering the valve.

9. The apparatus according to claim 1 , wherein the opening of the balloon is disposed within a recess formed in an exterior surface of the balloon.

10. The apparatus according to claim 9 , wherein the proximal end of the inflation tube is disposed within the recess in the resting position of the inflation tube.

11. The apparatus according to claim 10 , wherein a depth of the recess is greater than or equal to a height of the inflation tube that is within the recess in the resting position.

12. The apparatus according to claim 9 , the apparatus further comprising:

a receptacle disposed within the recess and configured to surround the proximal end of the inflation tube when in the resting position.

13. The apparatus according to claim 12 , wherein a gap between a wall of the recess and an outer wall of the receptacle is filled with a filler substance.

14. The apparatus according to claim 1 , wherein the internal tube has a curved shape to increase a length of the inflation tube contained within the internal tube.

15. The apparatus according to claim 1 , wherein a lumen wall of the internal tube is configured to allow sliding of the inflation tube relative to the lumen wall.

16. An apparatus for use in a stomach of a subject, the apparatus comprising:

a balloon adapted for placement in the stomach and having an opening to an interior of the balloon;

an internal tube in the interior of the balloon with a proximal end coupled to the opening of the balloon;

an inflation tube having a distal end in the interior of the balloon and a proximal end configured to receive a fluid on an exterior of the balloon, the inflation tube being configured to stretch from the stomach to a mouth of the subject to facilitate inflation of the balloon and to have a resting position that is substantially within the interior of the balloon, the internal tube being disposed around at least a portion of the inflation tube that is in the interior of the balloon; and

a receptacle disposed within a recess and configured to surround the proximal end of the inflation tube when in the resting position.

17. A method of adjusting an inflation level of a balloon inserted into a stomach of a subject where the balloon is in fluid communication with an inflation tube, the method comprising:

providing the apparatus according to claim 1 or 16 ;

stretching the inflation tube while keeping the balloon in the stomach, the inflation tube extending from within the balloon when stretching;

transferring a fluid to or from the balloon via the inflation tube which may or may not require connection to an extension tube, to adjust the inflation level of the balloon; and

returning the inflation tube to a resting position after adjusting the inflation level, a substantial portion of the inflation tube being contained within the balloon in the resting position.

18. The method according to claim 16 , further comprising:

positioning a proximal end of the inflation tube within a recess formed on an exterior of the balloon when returning the inflation tube to the resting position.

19. The apparatus according to claim 18 , wherein the internal tube has a variable length including a first length that accommodates a substantial portion of the inflation tube when the inflation tube is in the resting position, and a second length, which is shorter than the first length, when the inflation tube is stretched outwardly from the balloon.

20. The apparatus according to claim 18 , wherein the internal tube has a curved shape to increase a length of the inflation tube contained within the internal tube.