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Housing for a functional element - ECP Entwicklungsgesellschaft mbH
Housing for a functional element
United States Patent 8864642
Scheckel, Mario (Berlin, DE)
13/146452
ECP Entwicklungsgesellschaft mbH (Berlin, DE)
A61M1/10; A61M1/12
600/16-18, 623/3.1, 623/1.16, 623/1.28, 623/1.49
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20080132748 Method for Deployment of a Medical Device 2008-06-05 Shifflette
20040210304 Prosthetic valve for transluminal delivery 2004-10-21 Seguin et al. 623/2.11
20040044266 Intravascular pump 2004-03-04 Siess et al. 600/16
DE102004054714A1 2006-05-24 Faltbare intravasal einführbare Blutpumpe
WO1994005347A1 1994-03-17 CATHETER PUMP
WO2003103745A2 2003-12-18 EXPANDABLE BLOOD PUMP AND RELATED METHODS
International Preliminary Report on Patentability, from PCT/EP10/000965, mailed Aug. 28, 2011.
International Search Report and Written Opinion, from PCT/EP10/000965, mailed May 17, 2010.
1. A housing for a functional element, in particular for use in the medical field in naturally occurring vessels in the body, the housing wall of which has a slack, flexible, tensionable membrane with a plurality of formed parts secured thereon which support the membrane in the tensioned state thereof by forming one or more groups of formed parts wherein the formed parts of each group support one another in the tensioned state of the membrane, said formed parts of said groups positioned in a gap free relationship with respect to one another in said tensioned state, and a functional element comprising a fluid pump which produces an excess pressure in the housing which leads to tensioning of the membrane.
2. The housing according to claim 1, characterised in that at least one group of formed parts forms a rib-like linear structure in the tensioned state of the membrane.
3. The housing according to claim 1, characterised in that the formed parts are connected at least to the membrane.
4. The housing according to claim 1, characterised in that at least one formed part has a support surface which abuts against the membrane in the tensioned state.
5. The housing according to claim 3, characterised in that the at least one formed part is connected to the membrane on the entire support surface.
6. The housing according to claim 4, characterised in that the at least one formed part is connected to the membrane only on a part of the support surface, in particular only to a delimiting edge of the support surface.
7. The housing according to claim 4, characterised in that the formed part is secured on the membrane by an adhesive joint or another joining connection.
8. The housing according to claim 1, characterised in that the formed parts essentially cover the membrane in the tensioned state on the inside of the housing.
9. The housing according to claim 1, characterised in that adjacent formed parts abut against each other in the tensioned state.
10. The housing according to claim 9, characterised in that adjacent formed parts overlap each other partially in the tensioned state.
11. The housing according to claim 9, characterised in that adjacent formed parts engage one in the other in the tensioned state.
12. A device according to claim 1, characterised in that the pump forms the functional element.
13. A device according to claim 1, characterised by a suction opening and a catheter connection.
14. A device according to claim 1, characterised by a cushion with a variable volume that drives the fluid.
15. A device according to claim 1, wherein said fluid pump is a pump rotor having at least one pump blade located within said housing.
16. A device according to claim 15, characterised by support arms which support and/or centre the housing relative to the pump rotor or its shaft.
17. A device according to claim 16, characterised in that the support arms are flexible or bendable at least one bending joint.
18. A device according to claim 16, characterised in that the support arms engage in the tensioned state of the membrane.
19. Method for the production of a housing according to claim 1, characterised in that formed parts are secured firstly on a flat membrane and thereafter the membrane is rolled up and fitted together to form a hose.
20. A housing for a functional element, in particular for use in the medical field in naturally occurring vessels in the body, the housing wall of which has a slack, flexible, tensionable membrane with a plurality of formed parts secured thereon which support the membrane in the tensioned state thereof by forming one or more groups of formed parts wherein the formed parts of each group support one another in the tensioned state of the membrane to form a smooth cylindrical inner housing wall, and a functional element comprising a fluid pump which produces an excess pressure in the housing which leads to tensioning of the membrane.
The housing 8 has a conically tapered part 8d which is connected to the catheter 1 and which has, in the region in front of the catheter, at least one opening 10 via which the liquid can flow out. This is represented by the arrows 11 for a plurality of openings. Hence the transport of the fluid from a location of lower pressure—in the ventricle—to a location in which the pressure is increased locally by the energy input of the pump—can be produced above the aortic sinus (sinus aortae). The aortic valve (valva aortae) situated in front of the opening 10 acts as valve and prevents the fluid from flowing back into the ventricle 7.
FIG. 4 shows, in a cross-sectional view, the housing 8 in the compressed state, it being clear in this representation that the housing 8 has a membrane 8a and formed parts 8b, 8c which are present folded together in the compressed state of the housing. The individual formed parts 8b, 8c are connected respectively merely in a partial region of their support surface 22 to the membrane 8a by glueing. The pump rotor is not illustrated in the representation of FIGS. 4, 5 and 6 for the sake of clarity.
FIG. 5 shows the housing in a partially expanded state, the formed parts 8b, 8c approaching the membrane 8a with their support surfaces.
In FIG. 6, the housing 8 is shown in the completely expanded state, the formed parts 8b, 8c abutting completely against the membrane 8a and hence also not impeding a flow within the housing. In this state, the formed parts 8b, 8c mutually touch and overlap so that they mutually engage and mutually support their position. Hence, they form a scale-like reinforcement of the membrane and contribute substantially to the stability of the housing.
In FIG. 7, the pump housing 8 with a pump rotor 9 is represented in cross-section, the pump rotor 8 having a hub 9a and pump blades 9b, 9c. The pump blades 9b, 9c are folded against the hub 9a at least partially, which is made possible in that the pump blades are secured either in an articulated manner on the hub or are configured per se to be elastically flexible.
In the representation of FIG. 8, the housing 8 is completely expanded and the pump blades 9b, 9c are deployed to the maximum so that the maximum pump power is achieved in this constellation.
In FIG. 9, finally a flat membrane 8a is shown, on which formed parts 8b, 8c are secured by glueing before the membrane 8a, as indicated by the arrows 20, 2, is rolled up and fitted together to form a hose.
FIG. 10 shows, enlarged, the mutual engagement of formed parts 8b, 8c which have an asymmetrical configuration and are situated one above the other in a shingle- or scale-like manner.
As a result of this type of production, a housing according to the invention can be produced particularly easily and economically. The membrane can thereby be produced as a slack, flexible foil, elastically or non-elastically, and the formed parts 8b, 8c can be produced typically as plastic material injection moulded parts. The shingle- or scale-like positioning in the region of the formed parts 8b, 8c situated one above the other makes possible an advantageous compensation for the process-induced deviations in length and position of the formed parts. Greater production tolerances can be accepted and hence production costs can be lowered. An at least partially automated production is made possible.
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