Devices and methods for preparing a transcatheter heart valve system
Devices and methods for preparing a transcatheter heart valve system. The device includes a housing, sealing apparatuses and a port. The housing forms a chamber sized to receive a prosthetic valve and a portion of a delivery device. During use, the prosthesis is seated in the chamber, and the sealing apparatuses operated to seal the chamber about the delivery device. Air bubbles in a liquid delivered through the delivery device and to the chamber are removed from the system via the port, thereby flushing the system. Further, the device is manipulated to permit loading of the prosthesis into the delivery device in an air bubble-free environment.
1. A method of preparing a transcatheter heart valve system, including a delivery device and a stented prosthetic heart valve, for the performance of a transcatheter valve implantation procedure, the method comprising:
seating a stented prosthetic heart valve within a chamber defined by a housing of a valve loading device, the housing extending between opposing, first and second ends and defining an opening to the chamber at the each of the first and second ends;
connecting a first component of a delivery device to the stented prosthetic heart valve;
sealing the first and second openings relative to the delivery device;
dispensing a liquid through the delivery device and into the chamber;
creating a negative pressure in the chamber to remove air bubbles entrained in the liquid;
capturing the stented prosthetic heart valve within the delivery device; and
removing the valve loading device from the delivery device.
2. The method of claim 1 , wherein the delivery device further includes a tube defining a lumen and a shaft disposed within the lumen, the shaft connect to a tip located distal the tube, and further wherein the step of sealing the first and second openings includes establishing a seal at the tip and a seal at the tube.
3. The method of claim 2 , wherein the first component is a coupling body, carried by the shaft and configured to mate with a corresponding component of the stented prosthetic heart valve.
4. The method of claim 3 , wherein the step of capturing the stented prosthetic heart valve within the delivery device includes:
releasing the seal at the tip; and
retracting the shaft relative to the tube to draw the stented prosthetic heart valve into the lumen.
5. The method of claim 2 , wherein the stented prosthetic heart valve is configured to be reversibly collapsible from a natural arrangement to a collapsed arrangement, and further wherein:
following the step of loading the stented prosthetic heart valve within the chamber and during the step of dispensing a liquid, at least a portion of the stented prosthetic heart valve is distally beyond the tube and has a diameter greater than a diameter of the lumen; and
following the step of capturing the stented prosthetic heart valve within the delivery device, the stented prosthetic heart valve is retained in the collapsed arrangement, including an entirety of the prosthetic heart valve having a diameter not greater than a diameter of the lumen.
6. The method of claim 1 , wherein the loading device further includes a port open to the chamber, and further wherein the step of establishing a negative pressure in the chamber includes operating a vacuum instrument connected to the port, the port being located distal the stented prosthetic heart valve.
7. The method of claim 1 , wherein the housing includes first and second housing section, and further wherein the step of seating the stented prosthetic heart valve within the chamber includes:
loading the stented prosthetic heart valve within the second housing section, including the first housing section being separated from the second housing section; and
assembling the first housing section to the second housing section to complete the chamber.