Heart pump having contractible guide mechanism for pusher plate
First Claim
1. A blood pump useful as a ventricle assist or replacement device comprising:
- a housing having a blood chamber and a means for blood ingress and egress to and from the chamber;
a deflectable diaphragm that is continuous and has no openings therethrough comprising a wall of the blood chamber;
a pusher plate in operative association with the diaphragm;
means for selectively driving the pusher plate; and
,a telescoping guide mechanism in operative association with the pusher plate.
1 Assignment
0 Petitions
Accused Products
Abstract
A blood pump is disclosed that is useful as ventricle assist or replacement device comprising a housing having a blood chamber and inlet and outlet ports for the ingress and egress of blood to and from the chamber. A deflectable diaphragm comprises a wall of the blood chamber which upon deflection collapses the blood chamber to urge blood from the chamber out the outlet port. A pusher plate is disposed in association with the diaphragm. The pusher plate includes a collapsible guide mechanism which guides the plate from a first fill position to a second eject position. The guide mechanism can comprise a telescopic guide or straight-line linkage which is collapsible to a first fill position to occupy a substantially lesser space in the housing than when extended to second eject position. The guide mechanism avoids the necessity of a projection from the housing to accommodate a stroke of a guide mechanism. The guide mechanism can be independent of or combined with the drive means.
71 Citations
30 Claims
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1. A blood pump useful as a ventricle assist or replacement device comprising:
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a housing having a blood chamber and a means for blood ingress and egress to and from the chamber; a deflectable diaphragm that is continuous and has no openings therethrough comprising a wall of the blood chamber; a pusher plate in operative association with the diaphragm; means for selectively driving the pusher plate; and
,a telescoping guide mechanism in operative association with the pusher plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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- 9. A guide mechanism for a blood pump having an elastomeric diaphragm and a pusher plate to support the diaphragm comprising a plurality of nestable sleeves disposed for selective telescopic reciprocatory movement between extended and nested positions, and including means for restricting the pusher plate stroke to a linear motion, and a maximum length.
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11. An implantable ventricular assist or replacement device particularly useful as a blood pump comprising:
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a housing having a blood chamber, means for blood ingress and egress to and from the blood chamber, a drive chamber, and a segregating elastomeric diaphragm that is continuous and has no openings therethrough; means for selectively pressurizing the drive chamber to pump blood to and from the blood chamber; the diaphragm including a pusher plate bonded thereto and having a plate guide mechanism comprising a plurality of nestable sleeves arranged for telescopic reciprocatory movement between extended and nested positions, said plurality of sleeves having means for limiting preselected maximum travel stroke to restrict enlargement of the drive chamber. - View Dependent Claims (12, 13)
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14. A blood pump useful as a ventricle assist or replacement device comprising:
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a housing having a blood chamber and a means for blood ingress and egress to and from the chamber; a deflectable diaphragm comprising a wall of the blood chamber; a pusher plate in association with the diaphragm; means for selectively driving the pusher plate; and
,a collapsible guide mechanism means in association with the pusher plate for guiding the plate from a first fill position to a second eject position, said mechanism means being collapsible to the first fill position to occupy a substantially lesser space in the housing than when extended to the second eject position. - View Dependent Claims (15, 16, 17, 21)
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18. An implantable blood pump comprising:
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a housing having a blood chamber and a means for blood ingress and egress to and from the chamber; a deflectable diaphragm that is continuous and has no openings therethrough comprising a wall of the blood chamber; a pusher plate in association with the diaphragm; means for selectively driving the pusher plate; and
,a collapsible guide mechanism means in association with the pusher plate for guiding the plate from a first fill position to a second eject position, said mechanism means being collapsible to the first fill position to occupy a substantially lesser space in the housing than when extended to the second eject position. - View Dependent Claims (19, 20)
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22. A blood pump useful as a ventricle assist or replacement device comprising:
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a housing having a blood chamber, a drive chamber and a means for blood ingress and egress to and from the chamber; a deflectable diaphragm comprising a wall of the blood chamber; a pusher plate in operative association with the diaphragm; means for selectively driving the pusher plate; a telescoping guide mechanism in operative association with a pusher plate and generally disposed in the drive chamber for reciprocal movement in concert with selective operation of the diaphragm. - View Dependent Claims (23, 24, 25, 26)
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27. A blood pump useful as a ventricle assist or replacement device comprising:
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a housing having a blood chamber and a means for blood ingress and egress to and from the chamber; a deflectable diaphragm comprising a wall of the blood chamber; a pusher plate in operative association with the diaphragm; means for selectively driving the pusher plate; means for sensing a travel stroke of the pusher plate; and
,a telescoping guide mechanism in operative association with a pusher plate. - View Dependent Claims (28)
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29. An implantable ventricular assist or replacement device particularly useful as a blood pump comprising:
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a housing having a blood chamber, means for blood ingress and egress to and from the blood chamber, a drive chamber, and a segregating elastomeric diaphragm; means for selectively pressurizing the drive chamber to pump blood to and from the blood chamber; and
,the diaphragm including a pusher plate bonded thereto and having a plate guide mechanism comprising a plurality of nestable sleeves arranged for telescopic reciprocatory movement between extended and nested positions, the plurality of sleeves being disposed in the drive chamber in both the extended and nested positions to avoid a projection from the housing, said plurality of sleeves having means for limiting preselected maximum travel stroke to restrict enlargement of the drive chamber.
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30. An implantable ventricular assist or replacement device particularly useful as a blood pump comprising:
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a housing having a blood chamber, means for blood ingress and egress to and from the blood chamber, a drive chamber, and a segregating elastomeric diaphragm; means for selectively pressurizing the drive chamber to pump blood to and from the blood chamber; the diaphragm including a pusher plate bonded thereto and having a plate guide mechanism comprising a plurality of nestable sleeves arranged for telescopic reciprocatory movement between extended and nested positions, said plurality of sleeves having a means for limiting a preselected maximum travel stroke to restrict enlargement of the drive chamber; and
,means for sensing a travel stroke of the pusher plate.
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Specification