Transcatheter prosthetic heart valve delivery system with lateral offset control
Delivery devices for a stented prosthetic heart valve. The delivery device includes a spindle, at least one cord, and a lateral control feature. The cord is tensioned to crimp the prosthesis to a compressed condition for delivery to a target site. Tension is lessened to allow the prosthesis to self-expand. In a tethered and expanded state in which the prosthesis has self-expanded and is connected to the spindle by the cord, the lateral control feature directs the spindle to a prescribed location relative to the prosthesis appropriate for a functional evaluation of the prosthesis. In some embodiments, the spindle is directed to a center of the prosthesis; in other embodiments, the spindle is held at a commissure of the prosthesis. The lateral control features of the present disclosure assume numerous forms.
1. A delivery device for delivering a stented prosthetic heart valve including a valve structure carried by a stent frame configured to self-expand from a collapsed condition to a normal, expanded condition, the delivery device comprising:
an inner shaft forming a lumen;
a spindle extending from the inner shaft along a spindle axis, wherein the spindle defines a first hole open to the lumen and an exterior of the spindle, and a second hole open to the lumen and the exterior of the spindle, and the second hole is distally spaced from the first hole in an axial direction of the spindle axis;
a first cord slidably disposed within the lumen and extending through the first hole for selectively cinching the stented prosthetic heart valve at a first axial location of the stented prosthetic heart valve;
a second cord slidably disposed within the lumen and extending through the second hole for selectively cinching the stented prosthetic heart valve at a second axial location of the stented prosthetic heart valve, wherein the second axial location is distally spaced from the first axial location in the axial direction of the spindle axis; and
a lateral control feature configured to bias the spindle to a selected lateral location relative to the stented prosthetic heart valve tethered to the spindle in a tethered and expanded state, wherein the lateral control feature includes a first spring configured to apply a tension to the first cord and a tension to the second cord.
2. The delivery device of claim 1 , further comprising a third cord and the spindle defines a third hole open to the lumen and the exterior of the spindle, wherein the third cord is slidably disposed within the lumen and extends through the third hole for selectively cinching the stented prosthetic heart valve at a third axial location of the stented prosthetic heart valve, wherein the third axial location is distally spaced from the second axial location in the axial direction of the spindle axis.
3. The delivery device of claim 2 , wherein the first spring is further configured to apply a tension to the third cord.
4. The delivery device of claim 1 , further comprising a handle assembly, wherein the lateral control feature is located within the handle assembly.
5. The delivery device of claim 1 , wherein the lateral control feature comprises a tension control rod.
6. The delivery device of claim 5 , wherein the first spring interconnects the tension control rod to the first cord and the second cord.
7. The delivery device of claim 1 , further comprising a release pin, wherein the first cord is releasably connected to the release pin.
8. The delivery device of claim 7 , wherein the second cord is releasably connected to the release pin.
9. A delivery device for delivering a stented prosthetic heart valve including a valve structure carried by a stent frame configured to self-expand from a collapsed condition to a normal, expanded condition, the delivery device comprising:
an inner shaft forming a lumen;
a spindle extending from the inner shaft along a spindle axis, wherein the spindle defines a first hole open to the lumen and an exterior of the spindle, and a second hole open to the lumen and the exterior of the spindle, and the second hole is distally spaced from the first hole in an axial direction of the spindle axis;
a first cord slidably disposed within the lumen and extending through the first hole for selectively cinching the stented prosthetic heart valve at a first axial location of the stented prosthetic heart valve;
a second cord slidably disposed within the lumen and extending through the second hole for selectively cinching the stented prosthetic heart valve at a second axial location of the stented prosthetic heart valve, wherein the second axial location is distally spaced from the first axial location in the axial direction of the spindle axis; and
a lateral control feature configured to bias the spindle to a selected lateral location relative to the stented prosthetic heart valve tethered to the spindle in a tethered and expanded state, wherein the lateral control feature includes a first spring configured to apply a tension to the first cord, and the first spring is located within the spindle and interconnects the first cord to a tension control rod.
10. A delivery device comprising:
a stented prosthetic heart valve including a valve structure carried by a stent frame configured to self-expand from a collapsed condition to a normal, expanded condition;
an inner shaft forming a lumen;
a spindle extending from the inner shaft along a spindle axis, wherein the spindle defines a first hole open to the lumen and an exterior of the spindle, and a second hole open to the lumen and the exterior of the spindle, and the second hole is distally spaced from the first hole in an axial direction of the spindle axis;
a first cord slidably disposed within the lumen;
a second cord slidably disposed within the lumen;
a lateral control feature biasing the spindle to a selected lateral location relative to the stented prosthetic heart valve tethered to the spindle in a tethered and expanded state; wherein the lateral control feature includes a first spring applying tension to the first cord and the second cord; and
wherein the first cord extends through the first hole and is wrapped around a circumference of the stented prosthetic heart valve while cinching the stented prosthetic heart valve at a first axial location of the stented prosthetic heart valve, and the second cord extends through the second hole and is wrapped around the circumference of the stented prosthetic heart valve while cinching the stented prosthetic heart valve at a second axial location of the stented prosthetic heart valve, wherein the second axial location is distally spaced from the first axial location in the axial direction of the spindle axis.
11. The delivery device of claim 10 , further comprising a tension control rod; wherein the first spring interconnects the tension control rod to the first cord and the second cord.
12. The delivery device of claim 10 , further comprising a release pin, wherein the first cord is releasably connected to the release pin.
13. The delivery device of claim 12 , wherein the second cord is releasably connected to the release pin.