Pump, in particular a blood pump

Inventors: Mario Scheckel (Berlin, DE); Robert Decke (Berlin, DE)

Assignee: ECP Entwicklungsgesellschaft mbH

A61M60/414 A61M60/13 A61M60/237 A61M60/808 A61M60/81 A61M60/825 A61M60/148 A61M2205/0238 A61M2205/0266

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Quick Facts

Patent No.: US 12678613
App. No.: 18/141,721
Granted: Jul 14, 2026
Kind: B2

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Abstract

The present invention relates to a pump, in particular a blood pump having a proximal and a distal end and a pump housing arranged therebetween, a driveshaft arranged in an interior of the pump housing along the longitudinal direction, a conveying element arranged on the driveshaft, and a cannula. Here, the pump housing, the shaft arrangement and the conveying element are coordinated with one another in such a way that these guarantee the best possible efficiency and longevity of the pump.

Claims (33)

1 . A blood pump, comprising:

a pump housing having a proximal end, a distal end, a region of the proximal end, and a region of the distal end;

a driveshaft arranged in an interior of the pump housing along a longitudinal axis; and

a conveying element arranged on the driveshaft,

wherein the pump housing comprises a pump-receiving portion and a proximal portion arranged proximally of the pump-receiving portion, and the pump housing is transferrable in a radial direction extending transversely to the longitudinal axis from a compressed state into an expanded state,

wherein the driveshaft is rotatably held in a proximal bearing, the proximal bearing located in the region of the proximal end of the pump housing,

wherein the driveshaft is configured such that a bending resistance of a portion of the driveshaft in a region of the proximal portion of the pump housing and distal of the proximal bearing is coordinated with a bending resistance of the proximal portion of the pump housing, such that when the pump housing bends, the conveying element is arranged substantially concentrically within the pump-receiving portion, and

wherein the bending resistance of the proximal portion of the pump housing is less than a bending resistance of the pump-receiving portion of the pump housing.

2 . The blood pump according to claim 1 , wherein the conveying element comprises at least one foldable segment, wherein the at least one foldable segment is configured to collapse in response to an application of a torque.

3 . The blood pump according to claim 1 , wherein the pump housing further comprises a distal portion arranged distally of the pump-receiving portion, wherein the driveshaft is rotatably held in a distal bearing, the distal bearing located in the region of the distal end of the pump housing, and a bending resistance of a portion of the driveshaft in a region of the distal portion of the pump housing and proximal of the distal bearing is coordinated with a bending resistance of the distal portion of the pump housing such that, when the pump housing bends, the conveying element is arranged substantially concentrically within the pump-receiving portion.

4 . The blood pump according to claim 1 , wherein the bending resistance of the proximal portion of the pump housing is determined substantially by a bending resistance of helical struts disposed in the proximal portion of the pump housing and extending along the longitudinal axis, wherein the driveshaft is rotatably held in a distal bearing, the distal bearing located in a distal portion of the pump housing arranged distal of the pump-receiving portion of the pump housing, and a bending resistance of a portion of the driveshaft in a region of the distal portion of the pump housing and proximal of the distal bearing is coordinated with a bending resistance of the distal portion of the pump housing such that when the pump housing bends the conveying element is arranged substantially concentrically within the pump-receiving portion and the bending resistance of the distal portion of the pump housing is determined substantially by the bending resistance of helical struts disposed in the distal portion of the pump housing and extending along the longitudinal axis.

5 . The blood pump according to claim 1 , wherein the driveshaft is a hollow shaft which comprises a core.

6 . The blood pump according to claim 1 , wherein an Austenite finish temperature of the pump housing lies below a temperature of 34° C.

7 . The blood pump according to claim 6 , wherein the Austenite finish temperature of the pump housing lies below a temperature of 30° C.

8 . The blood pump according to claim 7 , wherein the Austenite finish temperature of the pump housing lies below a temperature of 20° C.

9 . The blood pump according to claim 1 , wherein the driveshaft comprises a nickel-cobalt alloy.

10 . The blood pump according to claim 1 , wherein the bending resistance of the portion of the driveshaft in the region of the proximal portion of the pump housing is less than a bending resistance of a portion of the driveshaft in the pump-receiving portion of the pump housing.

11 . A blood pump, comprising:

a pump housing having a proximal end, a distal end, a region of the proximal end, and a region of the distal end;

a driveshaft arranged in an interior of the pump housing along a longitudinal axis; and

a conveying element arranged on the driveshaft,

wherein the driveshaft is rotatably held in a proximal bearing, the proximal bearing located in the region of the proximal end of the pump housing,

wherein the bending resistance of the portion of the driveshaft in the region of the proximal portion of the pump housing is less than a bending resistance of a portion of the driveshaft in the pump-receiving portion of the pump housing.

12 . The blood pump according to claim 11 , wherein the conveying element comprises at least one foldable segment, wherein the at least one foldable segment is configured to collapse in response to an application of a torque.

13 . The blood pump according to claim 11 , wherein the pump housing further comprises a distal portion arranged distally of the pump-receiving portion, wherein the driveshaft is rotatably held in a distal bearing, the distal bearing located in the region of the distal end of the pump housing, and a bending resistance of a portion of the driveshaft in a region of the distal portion of the pump housing and proximal of the distal bearing is coordinated with a bending resistance of the distal portion of the pump housing such that when the pump housing bends the conveying element is arranged substantially concentrically within the pump-receiving portion.

14 . The blood pump according to claim 11 , wherein the bending resistance of the proximal portion of the pump housing is determined substantially by a bending resistance of helical struts disposed in the proximal portion of the pump housing and extending along the longitudinal axis, wherein the driveshaft is rotatably held in a distal bearing, the distal bearing located in a distal portion of the pump housing arranged distal of the pump-receiving portion of the pump housing, and a bending resistance of a portion of the driveshaft in a region of the distal portion of the pump housing and proximal of the distal bearing is coordinated with a bending resistance of the distal portion of the pump housing such that when the pump housing bends the conveying element is arranged substantially concentrically within the pump-receiving portion and the bending resistance of the distal portion of the pump housing is determined substantially by the bending resistance of helical struts disposed in the distal portion of the pump housing and extending along the longitudinal axis.

15 . The blood pump according to claim 11 , wherein the driveshaft is a hollow shaft which comprises a core.

16 . The blood pump according to claim 11 , wherein an Austenite finish temperature of the pump housing lies below a temperature of 34° C.

17 . The blood pump according to claim 16 , wherein the Austenite finish temperature of the pump housing lies below a temperature of 30° C.

18 . The blood pump according to claim 17 , wherein the Austenite finish temperature of the pump housing lies below a temperature of 20° C.

19 . The blood pump according to claim 11 , wherein the driveshaft comprises a nickel-cobalt alloy.