Distal bearing support
First Claim
1. A catheter pump, comprising:
- an elongated catheter body having a distal portion including an expandable cannula having an inlet and an outlet, the expandable cannula having a delivery profile and an operational profile larger than the delivery profile;
an impeller assembly including an impeller shaft and an impeller body including one or more blades, the impeller blades drawing blood into the cannula when rotated;
an expandable support having a mounting portion disposed distal of the impeller body and configured to maintain a position of the impeller relative to a cannula wall,wherein the expandable support comprises a digit comprising a first strut and a second strut, each of the first and second struts having a proximal end portion and a distal end portion, the distal end portion of the first strut joined to the distal end portion of the second strut, wherein the first and second struts are spaced apart wider at an intermediate portion than at the proximal end portion and the distal end portion.
3 Assignments
0 Petitions
Accused Products
Abstract
In various embodiments, a catheter pump is disclosed herein. The catheter pump can include an elongated catheter body having a distal portion including an expandable cannula having an inlet and an outlet. The expandable cannula can have a delivery profile and an operational profile larger than the delivery profile. An impeller assembly can include an impeller shaft, and an impeller body can include one or more blades. The impeller blades can draw blood into the cannula when rotated. Further, an expandable support can have a mounting portion disposed on the impeller shaft distal of the impeller body and a cannula contact portion for reducing a change in tip gap due to bending of the cannula. The cannula contact portion can be disposed distal of the mounting portion.
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Citations
23 Claims
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1. A catheter pump, comprising:
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an elongated catheter body having a distal portion including an expandable cannula having an inlet and an outlet, the expandable cannula having a delivery profile and an operational profile larger than the delivery profile; an impeller assembly including an impeller shaft and an impeller body including one or more blades, the impeller blades drawing blood into the cannula when rotated; an expandable support having a mounting portion disposed distal of the impeller body and configured to maintain a position of the impeller relative to a cannula wall, wherein the expandable support comprises a digit comprising a first strut and a second strut, each of the first and second struts having a proximal end portion and a distal end portion, the distal end portion of the first strut joined to the distal end portion of the second strut, wherein the first and second struts are spaced apart wider at an intermediate portion than at the proximal end portion and the distal end portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification