Delivery devices and methods for leadless cardiac devices

1. A delivery device for delivering an implantable leadless pacing device, the delivery device comprising:

an outer tubular member including a lumen extending from a proximal end to a distal end thereof;

an inner tubular member including a lumen extending from a proximal end to a distal end thereof, the inner tubular member slidably disposed within the lumen of the outer tubular member;

a distal holding section extending distally of a distal end of the inner tubular member, the distal holding section defining a cavity therein for receiving an implantable leadless pacing device; and

a handle assembly configured to releasably couple the outer tubular member relative to the inner tubular member;

wherein when the inner tubular member and the outer tubular member are coupled, the inner tubular member is held in tension, causing a hub section of the distal holding section to contact and apply a proximal force to the distal end of the outer tubular member.

2. The delivery device of claim 1 , wherein the proximal force holds the outer tubular member in compression.

3. The delivery device of claim 1 , wherein the handle assembly includes at least a first hub portion affixed adjacent to the proximal end of the outer tubular member and a second hub portion affixed adjacent to the proximal end of the inner tubular member.

4. The delivery device of claim 3 , further comprises a first locking mechanism having a first engaging feature on the first hub portion and a second engaging feature on the second hub portion, the first and second engaging features configured to be releasably coupled together within the lumen of the first hub portion of the handle assembly.

5. The delivery device of claim 4 , wherein the first locking mechanism has a locked configuration in which the inner tubular member and the outer tubular member are coupled and are axially displaced and rotated simultaneously.

6. The delivery device of claim 4 , wherein the first locking mechanism has an unlocked configuration in which the inner tubular member and the outer tubular member are independently rotatable and slidable.

7. The delivery device of claim 4 , wherein the first locking mechanism is selected from the group of a snap lock, a threaded engagement, or a quick connect locking feature.

8. The delivery device of claim 1 , wherein when the inner tubular member and the outer tubular member are coupled, actuation of either the inner tubular member or the outer tubular member results in movement of both the inner tubular member and the outer tubular member.

9. The delivery device of claim 1 , wherein when an implantable leadless pacing device is present in the cavity, the distal holding section extends distally of a distal end of the implantable leadless pacing device.

10. The delivery device of claim 1 , wherein the inner tubular member being held in tension includes a tensile force in the range of about 1-3 pounds-force being applied to the inner tubular member.

11. The delivery device of claim 1 , wherein the hub section is located at the proximal end of the distal holding section, and wherein the hub section is secured to the distal end of the inner tubular member.

12. A delivery device for delivering an implantable leadless pacing device, the delivery device comprising:

an outer tubular member including a lumen extending from a proximal end to a distal end thereof;

an inner tubular member including a lumen extending from a proximal end to a distal end thereof, the inner tubular member slidably disposed within the lumen of the outer tubular member;

a distal holding section extending distally of a distal end of the inner tubular member, the distal holding section defining a cavity therein for receiving an implantable leadless pacing device; and

a handle assembly configured to releasably couple the outer tubular member relative to the inner tubular member, the handle assembly including at least a first hub portion affixed adjacent to the proximal end of the outer tubular member and a second hub portion affixed adjacent to the proximal end of the inner tubular member;

wherein when the inner tubular member and the outer tubular member are coupled, the inner tubular member is held in tension and a hub section of the distal holding section contacts and applies a proximal force to the distal end of the outer tubular member;

wherein the first hub portion includes a lumen extending therein and at least a portion of the second hub portion is slidably and rotatably disposed within the lumen of the first hub portion.

13. A system for delivering an implantable leadless pacing device, comprising:

an implantable leadless pacing device; and

a delivery device comprising:

an outer tubular member including a lumen extending from a proximal end to a distal end thereof;

an inner tubular member including a lumen extending from a proximal end to a distal end thereof, the inner tubular member slidably disposed within the lumen of the outer tubular member; and

a distal holding section secured to and extending distally from a distal end of the inner tubular member by a hub section of the distal holding section, the distal holding section defining a cavity therein;

wherein the implantable leadless pacing device is disposed within the cavity with a distal end of the distal holding section extending distally of a distal end of the implantable leadless pacing device;

wherein when the inner tubular member and the outer tubular member are coupled, the inner tubular member is held in tension, causing the hub section of the distal holding section to contact and apply a proximal force to the distal end of the outer tubular member.

14. The system of claim 13 , wherein the proximal force holds the outer tubular member in compression.

15. The delivery device of claim 13 , wherein when the inner tubular member and the outer tubular member are coupled, actuation of either the inner tubular member or the outer tubular member results in movement of both the inner tubular member and the outer tubular member.

16. The system of claim 13 , further comprising a handle assembly configured to releasably couple the outer tubular member relative to the inner tubular member, the handle assembly including at least a first hub portion affixed adjacent to the proximal end of the outer tubular member and a second hub portion affixed adjacent to the proximal end of the inner tubular member.

17. The delivery device of claim 16 , wherein the first hub portion includes a lumen extending therein and at least a portion of the second hub portion is slidably and rotatably disposed within the lumen of the first hub portion.

18. The delivery device of claim 16 , further comprising a first locking mechanism having a first engaging feature on the first hub portion and a second engaging feature on the second hub portion, the first and second engaging features configured to be releasably coupled together within the lumen of the first hub portion of the handle assembly.

19. The delivery device of claim 18 , wherein the first locking mechanism has a locked configuration in which the inner tubular member and the outer tubular member are coupled and are axially displaced and rotated simultaneously.

20. The delivery device of claim 18 , wherein the first locking mechanism has an unlocked configuration in which the inner tubular member is longitudinally slidable relative to the outer tubular member.