Apparatus and method for sealing a vascular puncture
Closure devices for sealing a puncture and methods of sealing a puncture are described herein. A closure device may be used to position a sealant in a puncture. The sealant may be provided in a sheath which is retracted to expose the sealant in the puncture. A support member may be advanced to compress the sealant. The device may have a lock that prevents the support member from advancing prematurely. The lock may be unlocked when the sheath is at least partially retracted. The device may have an actuator that controls movement of the sheath and the support member. The lock may remain in a locked position until the sheath is at least partially retracted.
1. A system for closing a puncture, the system comprising:
a housing;
a frame positioned within the housing and axially movable within the housing;
a sealant sleeve movable with the frame;
a support member positioned within a lumen of the sealant sleeve and movable with the frame;
a sealant positioned in a distal end of the sealant sleeve, and wherein a distal end of the support member is positioned adjacent a proximal end of the sealant; and
a deployment actuator coupled to the housing and actuatable to actuate the sealant sleeve in a first direction, and actuating the support member in a second direction opposite the first direction;
wherein the frame is movable between a first position in which the frame prevents actuation of the deployment actuator and a second position in which the frame allows actuation of the deployment actuator.
2. The system of claim 1 , wherein the frame is biased proximally relative to the housing.
3. The system of claim 1 , wherein the frame includes an elongate member having a positioning element at a distal end thereof, and wherein the frame moves to the second position upon application of tension to the elongate member.
4. The system of claim 1 , wherein a distal end of the sealant sleeve is coupled to a first rack member selectively engagable with the frame and the deployment actuator, and wherein a distal end of the deployment actuator includes an actuation feature configured to engage a corresponding actuation feature of the first rack member when the frame is in the second position.
5. The system of claim 4 , wherein the actuation feature of the deployment actuator is configured to actuate the corresponding actuation feature of the first rack member to retract the sealant sleeve.
6. The system of claim 5 , wherein the actuation feature of the deployment actuator includes a protrusion and the corresponding actuation feature of the first rack member is a groove.
7. The system of claim 5 , wherein the actuation feature of the deployment actuator is a first actuation feature positioned on a first surface of the deployment actuator, and wherein the deployment actuator includes a second actuation feature configured to engage a corresponding actuation feature on the frame.
8. The system of claim 7 , wherein the actuation feature of the first rack member is a groove angled toward a distal end of the housing and wherein the actuation feature of the frame is a groove angled toward a proximal end of the housing.
9. The system of claim 1 , wherein a proximal end of the support member is coupled to a second rack member selectively engagable with the frame and the deployment actuator, and wherein a distal end of the deployment actuator includes an actuation feature configured to engage a corresponding actuation feature of the second rack member to extend the second rack member, thereby causing the support member to tamp the sealant.
10. The system of claim 9 , wherein the actuation feature of the deployment actuator includes a wall and wherein the actuation feature of the second rack member includes a ramp.
11. The system of claim 1 , wherein actuating the sealant sleeve in the first direction retracts the sealant sleeve, thereby exposing at least a portion of the sealant, and actuating the support member in the second direction causes the support member to tamp the sealant.