Catheter blood pumps and collapsible pump housings

Patent metadata

Field	Value
Publication number	US-12465748-B2
Application number	US-202016988221-A
Country	US
Kind code	B2
Filing date	Aug 7, 2020
Priority date	Aug 7, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

Catheter blood pumps that include an expandable pump portion. The pump portions include an collapsible blood conduit that defines a blood lumen. The collapsible blood conduits include a collapsible scaffold adapted to provide radial support to the blood conduit. The pump portion also includes one or more impellers.

First claim

What is claimed is:

1 . A catheter blood pump (“blood pump”), comprising:
an expandable pump portion extending distally relative to a catheter, the pump portion including
an impeller housing that includes an expandable blood conduit defining a blood lumen, the expandable blood conduit comprising:
a plurality of struts extending distally from the catheter, a proximal impeller scaffold portion extending distally from the plurality of struts, a distal impeller scaffold portion, and a central scaffold portion disposed between the proximal impeller scaffold portion and the distal impeller scaffold portion, the proximal impeller scaffold portion and the distal impeller scaffold portion having a plurality of linear axial elements and a plurality of circumferentially adjacent circumferential connectors, the central scaffold portion having a different configuration than the proximal impeller scaffold portion and the distal impeller scaffold portion and including a plurality of helical elements having a helical configuration between the proximal impeller scaffold portion and the distal impeller scaffold portion, wherein each of the helical elements is an extension of a linear element in at least one of the proximal impeller scaffold portion or the distal impeller scaffold portion, wherein the proximal impeller scaffold portion and the distal impeller scaffold portion do not include helical elements, the central scaffold portion being less stiff in response to a radially inward force than the proximal and distal impeller scaffold portions, and

a membrane coupled to the proximal impeller scaffold portion, the central scaffold portion, and the distal impeller scaffold portion, the membrane at least partially defining the blood lumen, and

at least one impeller disposed at least partially within at least one of the proximal impeller scaffold portion and the distal impeller scaffold portion.

2 . The blood pump of claim 1 , wherein the central scaffold portion is connected with at least one of the proximal impeller scaffold portion and the distal impeller scaffold portion.

3 . The blood pump of claim 2 , wherein the central scaffold portion is connected with the proximal impeller scaffold portion and the distal impeller scaffold portion.

4 . The blood pump of claim 3 , wherein the central scaffold portion is unitary with the proximal impeller scaffold portion and the distal impeller scaffold portion.

5 . The blood pump of claim 3 , wherein the central scaffold portion is attached to the proximal impeller scaffold portion and attached to the distal impeller scaffold portion.

6 . The blood pump of claim 1 , wherein the proximal impeller scaffold portion and the distal impeller scaffold portion have the same or substantially the same configuration.

7 . The blood pump of claim 6 , wherein a dimension of a first feature of the proximal impeller scaffold portion is different than a corresponding feature of the distal impeller scaffold portion.

8 . The blood pump of claim 1 , wherein the proximal impeller scaffold portion and the distal impeller scaffold portion have different configurations.

9 . The blood pump of any of claims 1-5 , wherein the distal impeller scaffold portion has a length that is greater than a length of the proximal impeller scaffold portion.

10 . The blood pump of any of claims 1-5 , wherein a width dimension of the helical elements is less than a width dimension of the plurality of linear axial elements.

11 . The blood pump of claim 1 , wherein the plurality of linear axial elements are spaced apart around the blood conduit, wherein first and second adjacent linear axial elements are each connected by a circumferential connector of the plurality of circumferentially adjacent circumferential connectors having at least one bend formed therein, and wherein the plurality of circumferentially adjacent circumferential connectors are displaced axially relative to one another, and wherein each one of the linear axial elements connects adjacent circumferential connectors that are axially displaced.

12 . The blood pump of claim 11 , wherein a first group of the plurality of circumferential connectors have a first axial position, and wherein a second group of the plurality of circumferential connectors have a second axial position, wherein the first and second axial positions alternate circumferentially around the blood conduit.

13 . The blood pump of claim 12 , wherein the proximal impeller scaffold portion and the distal impeller scaffold portion each comprise a separate plurality of linear axial elements.

14 . The blood pump of claim 1 , wherein the at least one impeller extends proximally out of the blood conduit.

15 . The blood pump of claim 1 , wherein the plurality of helical elements comprises more than two and less than fifteen helical elements.

16 . The blood pump of claim 1 , wherein the plurality of helical elements consists of four helical elements.

17 . The blood pump of claim 1 , wherein the proximal scaffold portion and the distal scaffold portion have the same or substantially the same configuration.

18 . The blood pump of claim 17 , wherein the distal scaffold portion is circumferentially offset relative to the proximal scaffold portion.

19 . The blood pump of claim 18 , wherein the distal scaffold portion is circumferentially offset between one and 90 degrees relative to the proximal scaffold portion.

20 . The blood pump of claim 17 , wherein first circumferential members in the distal scaffold portion are closer together than corresponding second circumferential members in the proximal scaffold portion.

21 . A catheter blood pump, comprising:
an elongate catheter shaft; an expandable scaffold extending distally from the elongate catheter shaft, the expandable scaffold comprising: a plurality of proximal struts coupled to the elongate catheter shaft and defining a blood outlet; a proximal scaffold portion extending distally from the proximal struts, the proximal scaffold portion including a first plurality of linear axial elements and a first plurality of circumferentially adjacent circumferential connectors, the proximal impeller scaffold portion not including helical elements; a distal scaffold portion positioned distal to the proximal scaffold portion, the distal scaffold portion including a second plurality of linear axial elements and a second plurality of circumferentially adjacent circumferential connectors, the distal scaffold portion not including helical elements; a central scaffold portion positioned between the proximal scaffold portion and the distal scaffold portion, the central scaffold portion having a helical configuration that is different than the proximal scaffold portion and the distal scaffold portion, the helical configuration including a plurality of helical elements, wherein each of the plurality of helical elements is an extension of at least one of the first plurality of linear axial elements of the proximal scaffold portion or the second plurality of linear axial elements of the distal scaffold portion, the central scaffold portion being less stiff in response to a radially inward force than the proximal and distal impeller scaffold portions; a plurality of distal struts extending distally from the distal scaffold portion and defining a blood inlet; at least one impeller disposed at least partially within at least one of the proximal scaffold portion and the distal scaffold portion; and a membrane coupled to the expanda

Assignees

• Shifamed Holdings Llc
• Supira Medical Inc

Inventors

• Calomeni Michael
• Brandt Brian D
• Hildebrand Daniel
• Hamel Gregory Michael

Classifications

• A61M60/13 Primary

  by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system · CPC title

• A61M60/135

  inside a blood vessel, e.g. using grafting · CPC title

• A61M60/857

  Implantable blood tubes · CPC title

• A61M60/81

  Pump housings · CPC title

• A61M60/808 Primary

  specially adapted for deformable impellers, e.g. expandable impellers · CPC title