Vascular assist device and methods
First Claim
Patent Images
1. A device, comprising:
- a compliant first layer configured to engage internal vasculature;
a second layer coupled to the first layer, the second layer having a stiffness greater than a stiffness of the first layer; and
the first layer and the second layer defining a cavity therebetween, the cavity having a volume wherein the first layer is configured to be deformed in response to a change in the volume of the cavity.
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Abstract
A vascular assist device is provided that can be readily implanted within the body of the patient without involving direct blood contact. The device is readily repositioned and/or removed. A method of fabrication and a method of implanting such a device is provided. A method of use is provided including increasing the pressure in an aortic cuff based on a control signal related to systole and/or diastole of a heart and/or the aortic pressure.
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Citations
232 Claims
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1. A device, comprising:
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a compliant first layer configured to engage internal vasculature;
a second layer coupled to the first layer, the second layer having a stiffness greater than a stiffness of the first layer; and
the first layer and the second layer defining a cavity therebetween, the cavity having a volume wherein the first layer is configured to be deformed in response to a change in the volume of the cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. device, comprising:
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an expandable layer configured to engage internal vasculature;
a cover layer coupled to the expandable layer and having a length and a width, the expandable layer and the cover layer defining a cavity therebetween, the cavity having a volume, the cover layer defining an opening in fluid communication with the cavity; and
a reinforcement element coupled to the cover layer and configured to maintain the length and width of the cover layer, wherein, the expandable layer is configured to be selectively deformed in response to a change in the volume of the cavity. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82)
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83. A vascular assist device configured to be coupled to at least a portion of a blood vessel, the device comprising:
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a vascular engaging layer;
an expandable layer;
a cover layer; and
the device having an uninstalled configuration and an installed configuration;
wherein, the vascular engaging layer is disposed between the outer wall of the blood vessel and the expanding layer;
the cover layer and the expanding layer are coupled so as to form a cavity therebetween, the cavity being bounded by the expanding layer and the cover layer;
the cover layer having an opening formed therein, the opening being in communication with the cavity and the cavity being configured to selectively receive a fluid via the opening whereby the fluid causes the volume of the cavity to change wherein the change in cavity volume causes the expanding layer to deform more than the cover layer to accommodate the change in cavity volume. - View Dependent Claims (84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103)
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104. A vascular assist device configured to be coupled to at least a portion of a blood vessel, the device comprising:
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a vascular engaging layer having a first stiffness;
a cover layer having a second stiffness that is greater than the first stiffness and being coupled to the vascular engaging layer such that a portion of the cover layer extends past at least a portion of the perimeter of the vascular engaging layer;
the cover layer and the vascular engaging layer forming a cavity therebetween, the cover layer having an opening formed therein in communication with the cavity, the cavity being configured to selectively receive a fluid via the opening; and
the device having an uninstalled configuration and an installed configuration. - View Dependent Claims (105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121)
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122. A system, comprising:
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a pump having a controller configured to receive a signal associated with the cardiac cycle of a heart;
a cuff comprising, a compliant first layer configured to engage internal vasculature;
a second layer coupled to the first layer and having a stiffness greater than a stiffness of the first layer and having an opening formed therein;
the compliant first layer and the second layer being coupled to form a cavity bounded by the first layer and the second layer, the cavity being in communication with the opening in the second layer; and
a conduit coupled between the opening and the pump, the conduit configured to convey a fluid between the pump and the cavity thereby causing deformation of the first layer by expanding and contracting the cavity. - View Dependent Claims (123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170)
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171. A method for augmenting blood flow in a patient body using a cuff formed from a first layer joined to a second layer so that a cavity exists between the layers such that filling the cavity preferentially deforms the first layer, the method comprising:
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detecting a first cardiac cycle trigger;
porting a fluid into the cavity so as to elastically deform the first layer thereby compressing a blood vessel in response to the first cardiac cycle trigger; and
porting a fluid out of the cavity in response to a second cardiac cycle trigger. - View Dependent Claims (172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189)
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190. A method for augmenting blood flow in a body using a cuff formed from a first layer joined to a second layer so that a cavity exists between the layers such that filling the cavity preferentially deforms the first layer, the method comprising:
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detecting a cardiac cycle trigger;
porting a fluid into the cavity so as to elastically deform the first layer thereby compressing a blood vessel in response to the cardiac cycle trigger;
holding the vessel compressed for known duration andporting a fluid out of the cavity at the end of the duration in order to allow the vessel to relax. - View Dependent Claims (191, 192, 193, 194, 195, 196)
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197. A method for augmenting blood flow in a vessel of a patient using a cuff having a compliant first layer that at least partially encircles a vessel adjacent the cuff, a second layer coupled to the first layer, the first layer and the second layer defining a cavity therebetween, the method comprising:
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changing the pressure of a fluid in the cavity based on a signal associated with the cardiac cycle;
deforming the first layer in response to the changing pressure of the fluid in the cavity; and
deforming the walls of a vessel at least partially encircled by the first layer in response to the deforming of the first layer. - View Dependent Claims (198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210)
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211. A system, comprising:
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a plurality of cuffs, each of the plurality of cuffs including a compliant first layer configured to engage internal vasculature;
a second layer coupled to the first layer, the first layer and the second layer defining a cavity therebetween, the second layer defining an opening in communication with the cavity; and
a connector configured to couple the plurality of cuffs to one another. - View Dependent Claims (212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232)
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Specification