Cannula assembly
First Claim
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1. A cannula assembly for an intravascular heart pump system comprising:
- a catheter;
a cannula coupled to a distal end of the catheter; and
a pigtail extension coupled to a distal end of the cannula, the pigtail extension configured to position the cannula within the heart, the pigtail extension including;
a proximal section having a first stiffness, anda distal section having a second stiffness;
wherein the first stiffness is greater than the second stiffness; and
wherein the proximal section is positioned between the distal end of the cannula and at least a portion of the distal section.
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Abstract
Cannula assemblies and methods of manufacturing cannula assemblies are provided. The cannula assembly includes a cannula and a pigtail extension coupled to the cannula. The pigtail extension includes a proximal section having a first stiffness and a distal section having a second stiffness, the first stiffness greater than the second stiffness. The proximal section of the pigtail extension is positioned between the cannula and at least a portion of the distal section.
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Citations
21 Claims
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1. A cannula assembly for an intravascular heart pump system comprising:
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a catheter; a cannula coupled to a distal end of the catheter; and a pigtail extension coupled to a distal end of the cannula, the pigtail extension configured to position the cannula within the heart, the pigtail extension including; a proximal section having a first stiffness, and a distal section having a second stiffness; wherein the first stiffness is greater than the second stiffness; and wherein the proximal section is positioned between the distal end of the cannula and at least a portion of the distal section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A cannula assembly kit for an intravascular heart pump system comprising:
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a catheter; a cannula coupled to a distal end of the catheter; a first pigtail extension, the first pigtail extension including a first proximal section having a first stiffness and a first length, and a first distal section having a second stiffness, the first stiffness being greater than the second stiffness; and second pigtail extension, the second pigtail extension including a second proximal section having a third stiffness and a second length, and a second distal section having a fourth stiffness, the third stiffness being greater than the fourth stiffness; wherein the second length is greater than the first length; wherein the first pigtail extension and the second pigtail extension are each configured to detachably couple to the cannula; and wherein the first pigtail extension and the second pigtail extension are each configured to position the cannula within the heart.
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20. A cannula assembly for an intravascular heart pump system comprising:
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a cannula; and a pigtail extension coupled to the cannula, the pigtail extension including; a proximal section having a first stiffness, and a distal section having a second stiffness; wherein the first stiffness is greater than the second stiffness; wherein the proximal section is positioned between the cannula and at least a portion of the distal section; and wherein the proximal section is dimensioned to have a buckling load greater than a thrust force generated by the blood pump assembly.
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21. A cannula assembly for an intravascular heart pump system comprising:
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a cannula; and a pigtail extension coupled to the cannula, the pigtail extension including; a proximal section having a first stiffness, and a distal section having a second stiffness; wherein the first stiffness is greater than the second stiffness; wherein the proximal section is positioned between the cannula and at least a portion of the distal section; and wherein the distal section is dimensioned to have a buckling load less than a thrust force generated by the blood pump assembly.
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Specification