Abstract:
A graft device for a mammalian patient comprises a tubular conduit and a fiber matrix surrounding the tubular conduit. The fiber matrix can comprise one or more polymers delivered by an electrospinning device. Systems and methods of creating a graft device are also provided.
Abstract:
A graft device is provided comprising a flow conduit and a surrounding covering. The graft device can connect a first body space and a second body space. In one embodiment, the flow conduit is a vein, such as a harvested saphenous vein, useful as an arterial graft, for example and without limitation, in a coronary artery bypass procedure. Also provided are methods of preparing a graft device and connecting the graft device between a first body space and a second body space, such as the aorta and a location on an occluded coronary artery, distal to the occlusion.
Abstract:
In some aspects, graft devices for a mammalian patient can include a tubular member comprising a first end; and a fiber matrix surrounding the tubular member, wherein the fiber matrix is designed and constructed to be substantially continuously tapered at the first end to define a diameter that increases as it approaches the first end.
Abstract:
In some aspects, a graft device can include a biodegradable inner layer, an outer layer, a first end portion, a second end portion, and a lumen therebetween. The biodegradable inner layer typically includes an inner surface and an outer surface. The outer layer typically includes a fiber matrix surrounding the outer surface of the inner layer. The graft device can include a reinforced end portion. At least 10% or at least 50% of the graft device can remain after 90 days of implantation. In some cases, at least 10% or at least 50% of the graft device can remain after 180 days of implantation. The graft device can include a kink-resisting element. The graft device can include at least one layer with a dynamic compliance less than or equal to at least one of: 20%/100 mmHg or 5%/100 mmHg.
Abstract:
In some aspects, a graft device can include a biodegradable inner layer, an outer layer, a first end portion, a second end portion, and a lumen therebetween. The biodegradable inner layer typically includes an inner surface and an outer surface. The outer layer typically includes a fiber matrix surrounding the outer surface of the inner layer. The graft device can include a reinforced end portion. At least 10% or at least 50% of the graft device can remain after 90 days of implantation. In some cases, at least 10% or at least 50% of the graft device can remain after 180 days of implantation. The graft device can include a kink-resisting element. The graft device can include at least one layer with a dynamic compliance less than or equal to at least one of: 20%/100 mmHg or 5%/100 mmHg.
Abstract:
A system for electrospinning a fiber matrix on a tubular member includes at least one nozzle, a tubular member in a spaced relationship to the at least one nozzle, and a fluid source for pressurizing a lumen of the tubular member. An electrical potential is applied between the at least one nozzle and either the tubular member or fluid from the fluid source. The electrical potential draws at least one fiber from the at least one nozzle to the tubular member.
Abstract:
In some aspects, a system for producing a graft device can include a rotating assembly, a polymer delivery assembly, a controller and a diagnostic assembly. The rotating assembly can be constructed and arranged to rotate a tubular conduit. The polymer delivery assembly can be constructed and arranged to receive a polymer and deliver a fiber matrix comprising the polymer about the tubular conduit. The controller can be constructed and arranged to control the polymer delivery assembly and the rotating assembly. The diagnostic assembly can be constructed and arranged to detect an undesired state of at least one of the system or the graft device. Methods for producing a graft device are also provided.
Abstract:
A graft device for a mammalian patient tubular conduit comprises a fiber matrix surrounding the tubular conduit and a spine comprising a first support portion and a second support portion. At least one of the first support portion or the second support portions can be constructed and arranged to rotate relative to the other to receive the tubular conduit. The first support portion can comprise a first set of projections and the second support portion can comprise a second set of projections that interdigitiate with the first set of projections. Tools for creating the spine and for applying the spine are also provided.
Abstract:
A system for applying a fiber matrix on a tubular member is provided. A mandrel, configured for atraumatic placement within the tubular member, is included. Methods for atraumatic placement of a mandrel into a tubular member are also provided.
Abstract:
Methods and devices for treating a vessel for use in a medical procedure are disclosed. A vein or other vessel can be modified in situ, prior to harvesting. Subsequently, at least a portion of the vessel is removed, and subsequently implanted to treat a patient, typically in a bypass procedure in which the vessel portion fluidly connects a source of oxygenated blood to an occluded artery.