Functional element, in particular fluid pump, having a housing and a conveying element

Patent metadata

Field	Value
Publication number	US-10107299-B2
Application number	US-201013261216-A
Country	US
Kind code	B2
Filing date	Sep 22, 2010
Priority date	Sep 22, 2009
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

The invention relates to a fluid pump having a housing delimiting a fluid chamber and having a conveying element for the fluid disposed in the fluid chamber, the housing, with respect to the shape and/or size thereof, being able to be changed between at least a first, expanded state and a second, compressed state. The object, to stabilize adequately a corresponding housing, is achieved according to the invention by the housing having at least one stabilization chamber which can be supplied with a fluid pressure and is different from the fluid chamber, the first state of the housing being assigned to a first fluid pressure in the stabilization chamber and the second state of the housing being assigned to a second fluid pressure.

First claim

The invention claimed is:

1. A fluid pump comprising:
a housing delimiting a fluid chamber, the housing having a proximal end connected to a catheter and a distal end, the housing being changeable between at least a first, expanded state and a second, compressed state, the housing having: an inner wall, an outer wall, at least one stabilization chamber, different from the fluid chamber, disposed between the inner wall and the outer wall, wherein the stabilization chamber can be supplied with a fluid pressure, the first state of the housing corresponding to a first fluid pressure in the stabilization chamber and the second state of the housing corresponding to a second fluid pressure in the stabilization chamber, and at least one of the inner and outer wall of the housing being elastic and configured to contract elastically into the second state during the transition from the first into the second state, wherein the housing is configured to be positioned within a blood vessel outside of the aortic valve, and wherein an outer diameter of the housing is smaller than an inner diameter of the blood vessel when the housing is in the first state;
a radially compressible rotor disposed in the fluid chamber and having at least one blade; and
an elongate cannula configured to be positioned across an aortic valve, the elongate cannula also being connected to the distal end of the housing and in communication with the fluid chamber;
wherein in the second state, a diameter of the housing is reduced by the elasticity in its expanded state to such an extent that the rotor is compressed radially by the inner wall.

2. The fluid pump according to claim 1 , wherein the first fluid pressure of the first state in the at least one stabilization chamber is higher than the second fluid pressure of the second state.

3. The fluid pump according to claim 2 , wherein the housing has the shape of a hollow cylinder, a toroid or a hollow spheroid at least in portions.

4. The fluid pump according to claim 3 , wherein the stabilization chamber is in the form of elongated cavities in the expanded housing state.

5. The fluid pump according to claim 4 , wherein at least three stabilization chambers in the form of elongated cavities are provided in the first expanded state.

6. The fluid pump according to claim 4 , wherein the elongated cavities have an annularly or helically circumferential configuration in the circumferential direction of the hollow cylinder, toroid or hollow spheroid.

7. The fluid pump according to claim 6 , wherein at least one stabilization chamber extends parallel to the longitudinal axis of the hollow cylinder, toroid or hollow spheroid in the wall thereof.

8. The fluid pump according to claim 3 , wherein the at least one stabilization chamber essentially fills the space of the housing wall.

9. The fluid pump according to claim 8 , wherein the at least one stabilization chamber is penetrated at least partially by respectively at least one web.

10. The fluid pump according to claim 9 , wherein the housing has the shape of a hollow-walled balloon.

11. The fluid pump according to claim 10 , wherein the housing has an inflow opening and an outflow opening which are provided respectively with a valve.

12. The fluid pump according to claim 1 , wherein the at least one blade is flexible elastically radially towards the rotor axis.

13. The fluid pump according to claim 12 , wherein the rotor consists at least partially of a volume-compressible material.

14. The fluid pump according to claim 13 , wherein the rotor has compressible cavities.

15. The fluid pump according to claim 14 , wherein the rotor is designed to be hub-free.

16. The fluid pump according to claim 15 , wherein the rotor is designed at least in part as a fluid-fillable balloon.

17. The fluid pump according to claim 10 , wherein the rotor in the filled form essentially fills the fluid chamber of the housing.

18. The fluid pump according to claim 1 , wherein the rotor is filled with the same fluid as the at least one stabilization chamber.

19. The fluid pump according to claim 12 , wherein the rotor and the at least one stabilization chamber of the housing can be connected to the same fluid pressure source.

20. The fluid pump according to claim 4 , wherein the stabilization chamber is within a housing wall.

21. The fluid pump according to claim 11 , wherein the valve is a one-way valve.

22. The fluid pump according to claim 13 , wherein the material is foam.

23. The fluid pump of claim 1 , wherein the elongate cannula extends from a blood vessel into a ventricle of a human body.

24. The fluid pump of claim 1 , wherein the catheter is configured to provide the first fluid pressure to the stabilization chamber.

25. The fluid pump of claim 1 , wherein the stabilization chamber comprises an inflatable region, the inflatable region having a distal end and a proximal end, and wherein a distal end of the rotor is positioned proximal to the distal end of the inflatable region when the housing is in the first state.

26. The fluid pump of claim 1 , wherein the at least one blade is helical.

27. The fluid pump of claim 1 , wherein the stabilization chamber includes at least one reinforcing strut extending between the inner wall and the outer wall, the reinforcing strut configured to prevent shear movements between the inner wall and the outer wall.

Assignees

• Scheckel Mario
• Ecp Entw Mbh

Inventors

• Scheckel Mario

Classifications

• A61M1/1034

  Human Necessities · mapped topic

• A61M1/1012

  Human Necessities · mapped topic

• A61M1/101

  Human Necessities · mapped topic

• A61M1/122

  Human Necessities · mapped topic

• Y10T137/85978

  With pump · CPC title