Devices and methods for placing a gastrointestinal device

1. A catheter handle for a delivery system of a gastrointestinal device, the catheter handle comprising:

an inner catheter movable within the handle;

an elongated element within the handle, the elongated element surrounding a portion of the inner catheter, an inner diameter of the elongated element being about the same as or greater than an outer diameter of the inner catheter, wherein the elongated element comprises slots and the button comprises ramped teeth aligned with the slots; and

a button on a side of the handle, the button configured to cause engagement of the inner catheter via the elongated element when the button is depressed, wherein the button is configured to cause the ramped teeth to engage the inner catheter via the slots when the button is depressed and press the inner catheter against the elongated element, thereby retaining the inner catheter within the handle.

2. The catheter handle of claim 1 , wherein the slots are transverse slots spaced along a length of the elongated element on two sides of the elongated element.

3. The catheter handle of claim 2 , wherein the slots on one side of the elongated element are offset from the slots on the other side of the elongated element.

4. The catheter handle of claim 3 , wherein the slots are ramped, and wherein the ramped teeth and ramped slots define multiple complementary features.

5. The catheter handle of claim 1 , further including a resilient element configured to non-plastically deform when the button is depressed and to provide a restoring force to cause the ramped teeth to disengage the inner catheter when the button is released.

6. The catheter handle of claim 1 , wherein the elongated element is a surround tube, and wherein the button is configured to bend the surround tube and non-plastically deform the inner catheter when the button is depressed, thereby retaining the inner catheter within the handle.

7. The catheter handle of claim 6 , wherein:

(a) the surround tube comprises a silicone tube,

(b) the button comprises a rigid thermoplastic, and/or

(c) the button bends the surround tube between ends of the surround tube, the ends being held in place by the handle.

8. The catheter handle of claim 1 , wherein the elongated element is a lever including a lever jaw, and wherein the button is configured to cause the lever to rotate about a pivot and the lever jaw to engage the inner catheter when the button is depressed, thereby retaining the inner catheter within the handle.

9. The catheter handle of claim 8 , wherein:

(a) the lever defines a lumen through which the inner catheter extends;

(b) the lever is configured to translate a force with which the button is depressed into a force with which the inner catheter is engaged at an amplification ratio in the range of about 1:1 to about 2:1; and/or

(c) the lever jaw includes directional teeth; and/or further including a resilient element configured to non-plastically deform when the button is depressed and to provide a restoring force to cause the lever jaw to disengage the inner catheter when the button is released.

10. The catheter handle of claim 1 , wherein the inner catheter comprises an inner extension catheter configured to draw a portion of a sleeve from an anchor and from a container assembly as the anchor is retained therein.

11. A method of retaining an inner catheter for delivery of a gastrointestinal device, the method comprising:

surrounding a portion of the inner catheter that is movably disposed within a handle with an elongated element within the handle;

depressing a button on a side of the handle, to engage the inner catheter via the elongated element; and

retaining the inner catheter within the handle based on the resulting engagement of the inner catheter, wherein:

(a) the elongated element comprises slots and the button includes ramped teeth aligned with the slots, and wherein depressing the button causes the ramped teeth to engage the inner catheter via the slots and press the inner catheter against the elongated element;

(b) the elongated element is a surround tube, and wherein depressing the button bends the surround tube and non-plastically deforms the inner catheter;

(c) the elongated element is a lever including a lever jaw, and wherein depressing the button causes the lever to rotate about a pivot and the jaw of the lever to engage the inner catheter; and/or

(d) the method further comprising advancing the inner catheter retained within the handle into a lumen of an outer catheter.

12. The method of claim 11 , further comprising drawing a portion of a sleeve from an anchor, and from a container assembly, as the anchor is retained therein, using the inner catheter.

13. A catheter handle for a delivery system of a gastrointestinal device, the catheter handle comprising:

(a) an inner catheter movable within the handle;

(b) an elongated element within the handle; and

(c) a button on a side of the handle; wherein

(i) the elongated element comprises slots and the button comprises ramped teeth aligned with the slots, wherein the button is configured to cause the ramped teeth to engage the inner catheter via the slots when the button is depressed, thereby retaining the inner catheter within the handle;

(ii) the elongated element is a surround tube, wherein depressing the button bends the surround tube and non-plastically deforms the inner catheter; and/or

(iii) the elongated element is a lever including a lever jaw, wherein depressing the button causes the lever to rotate about a pivot and the jaw of the lever to engage the inner catheter.

14. The catheter handle of claim 13 , wherein the elongated element is a surround tube, wherein depressing the button bends the surround tube and non-plastically deforms the inner catheter.

15. The catheter handle of claim 13 , wherein the elongated element is a lever including a lever jaw, wherein depressing the button causes the lever to rotate about a pivot and the jaw of the lever to engage the inner catheter.