Cannula assembly
AssigneeABIOMED, Inc.
InventorsScott C. Corbett, Caitlyn Hastie
Life of this patent
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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.
Claims21
A cannula assembly for an intravascular heart pump system comprising:
- a catheter;
- a cannula in communication with a distal end of the catheter;
- and
- a pigtail extension in communication with a distal end of the cannula, the pigtail extension configured to position the cannula within the heart, the pigtail extension comprising:
- a proximal section comprising a single layer of a first material at a first thickness, and
- a distal section comprising a first layer of the first material at a second thickness, and a second layer of a second material at a third thickness, the second and third thicknesses in aggregate corresponding to the first thickness,
- wherein the distal section has an overall lower stiffness than the proximal section, and
- wherein the proximal section is positioned between the distal end of the cannula and at least a portion of the distal section.
A cannula assembly for an intravascular heart pump system comprising:
- a cannula;
- and
- a pigtail extension in communication with the cannula, the pigtail extension comprising:
- a proximal section comprising a single layer of a first material at a first thickness, and
- a distal section comprising a first layer of the first material at a second thickness, and a second layer of a second material at a third thickness, the second and third thicknesses in aggregate corresponding to the first thickness,
- wherein the distal section has an overall lower stiffness than the proximal section,
- 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 heart pump assembly.
A cannula assembly for an intravascular heart pump system comprising:
- a cannula;
- and
- a pigtail extension in communication with the cannula, the pigtail extension comprising:
- a proximal section comprising a single layer of a first material at a first thickness, and
- a distal section comprising a first layer of the first material at a second thickness, and a second layer of a second material at a third thickness, the second and third thicknesses in aggregate corresponding to the first thickness,
- wherein the distal section has an overall lower stiffness than the proximal section,
- 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.
Dependencies are inferred from the claim text.