Devices, methods and systems for establishing supplemental blood flow in the circulatory system
Devices, systems and methods for establishing a blood flow conduit between a chamber in a heart of a patient and a remote location. A blood inflow cannula having an outer surface and proximal and distal end portions. The distal end portion is configured for insertion into the chamber of the heart. First and second anchor elements have respective maximum width dimensions extending outwardly from the outer surface of the cannula. The first anchor element is positioned more distally than the second anchor element defining a tissue receiving space therebetween. The maximum width dimension of the first anchor element may be larger than the maximum width dimension of the second anchor element in use. The first anchor element is configured to be positioned inside the heart chamber and the second anchor element is configured to be positioned outside the heart chamber with heart tissue held in the tissue receiving space therebetween.
1. A blood circulation assist device comprising:
an inflow cannula including a proximal end portion and a distal end portion opposite the proximal end portion, the distal end portion and the proximal end portion defining a longitudinal axis extending therebetween;
a first anchor element at the distal end portion, the first anchor element having a first diameter and a thickness along the longitudinal axis; and
a second anchor element disposed distally relative to the first anchor element at the distal end portion, the second anchor element having a second diameter larger than the first diameter and the thickness of the first anchor element; the first anchor element and the second anchor element define a distance therebetween, the distance being greater than the thickness.
2. The blood circulation assist device of claim 1 , wherein the distance between the first anchor element and the second anchor element is approximately 4 mm.
3. The blood circulation assist device of claim 1 , wherein the first diameter of the first anchor element is approximately 12 mm and the second diameter of the second anchor element is approximately 14 mm.
4. The blood circulation assist device of claim 1 , wherein the thickness is approximately 2.5 mm.
5. The blood circulation assist device of claim 1 , wherein the first anchor element and the second anchor element are each an annular disc extending radially outward from the inflow cannula.
6. The blood circulation assist device of claim 1 , wherein the first diameter of the first anchor element and the second diameter of the second anchor element are each a maximum width dimension.
7. The blood circulation assist device of claim 1 , wherein the inflow cannula includes a plurality of coils extending along the longitudinal axis.
8. The blood circulation assist device of claim 1 , wherein the first anchor element and the second anchor element are transverse with respect to the longitudinal axis.
9. The blood circulation assist device of claim 1 , wherein the first anchor element and the second anchor element are configured to provide a fluid-tight seal between a portion of a heart tissue.
10. A blood circulation assist device comprising:
an inflow cannula including a distal end portion and a proximal end portion opposite the distal end portion, the distal end portion having a first anchor element and a second anchor element being distal relative to the first anchor element, the first anchor element and the second anchor element each surrounding the distal end portion and defining a tissue-receiving space therebetween, the first anchor element defining a first diameter and the second anchor element defining a second diameter larger than the first diameter, the first anchor element includes a first thickness and the second anchor element includes a second thickness approximately equal to the first thickness.
11. The blood circulation assist device of claim 10 , wherein the tissue-receiving space defines a distance, the distance being greater than the first thickness of the first anchor element and the second thickness of the second anchor element.
12. The blood circulation assist device of claim 10 , wherein the distal end portion and the proximal end portion define a longitudinal axis extending therebetween, and the first thickness and the second thickness extend along the longitudinal axis.
13. The blood circulation assist device of claim 12 , wherein the inflow cannula includes a plurality of coils extending along the longitudinal axis.
14. The blood circulation assist device of claim 10 , wherein the first anchor element and the second anchor element are annular discs.
15. The blood circulation assist device of claim 10 , wherein the first anchor element and the second anchor element are configured to form a fluid tight seal within the tissue-receiving space.