175 results about "Collateral vessels" patented technology

A method and systems for treating chronic total occlusions, particularly those that are difficult to treat, is disclosed. In this approach, recanalizing the CTO is achieved using a combined antegrade and retrograde approach. The proximal end of the occlusion is penetrated using an antegrade wire, using a traditional approach. Using collateral vessels, the distal end of the occlusion is crossed in a retrograde fashion and by appropriately maneuvering each member, a continuous channel is created. Additional elements such as capture devices, dilators and injection catheters are also disclosed.

A bifurcation stent includes a first end which is deformable or crushable at a lower force than a second end. The crushable first end and more rigid second end of the bifurcation stent allow one end of the stent to remain expanded in tissue supporting configuration in a side branch of a vessel bifurcation while the other end is easily crushed against the side wall of the main vessel into which it extends. A method of supporting a bifurcated body lumen with the bifurcation stent involves delivering the bifurcation stent in an unexpanded configuration to a bifurcation in a body lumen, positioning the bifurcation stent with the distal portion substantially within a side branch vessel of the bifurcation and the proximal crushable portion substantially within the main vessel, expanding the bifurcation stent, and expanding a main vessel stent along side the bifurcation stent and thereby crushing at least a portion of the crushable proximal portion of the bifurcation stent against the main vessel wall.

A method and systems for treating chronic total occlusions, particularly those that are difficult to treat, is disclosed. In this approach, recanalizing the CTO is achieved using a combined antegrade and retrograde approach. The proximal end of the occlusion is penetrated using an antegrade wire, using a traditional approach. Using collateral vessels, the distal end of the occlusion is crossed in a retrograde fashion and by appropriately maneuvering each member, a continuous channel is created. Additional elements such as capture devices, dilators and injection catheters are also disclosed.

Exemplary embodiments comprise AV fistulas and other anastomotic devices for creating new or reinforcing existing side-branch vessels, and/or bridging neighboring vessels together. An exemplary embodiment may comprise a sidewall port, such as a flanged sidewall port, and/or flow frame design, such as a partially bare, flexible stent or a whisk, for purposes of creating a transmural flow. Another exemplary embodiment may comprise a compliant vessel support to aid in the transition from device to vessel and/or vessel to device, and to promote vessel dilation.

Apparatus and method for harvesting selected vessels in the body of a patient include manual manipulation of a rigid dissecting endoscope and the reconfiguration thereof to facilitate tissue dissection and tissue dilation in the formation of an anatomical space about the vessel within which side-branch vessels may be manipulated in preparation for severance and removal of the vessel from the anatomical space.

The present invention provides a method and system for treating an ostium of a side-branch vessel. The system includes a catheter, a first inflatable member, a stent disposed on the first inflatable member, and a second inflatable member. The first inflatable member is disposed on a distal portion of the catheter, while the second inflatable member is disposed on a proximal portion of the catheter. The first inflatable member is inflated a first time to expand the stent within the side branch. The first inflatable member is then deflated, advanced, and inflated a second time to anchor the system while the second inflatable member is inflated to conform a portion of the stent to the ostium of the side-branch vessel.

An improved stent design and stent delivery catheter assembly for repairing a main vessel and a side branch vessel forming a bifurcation. The stent includes rings aligned along a common longitudinal axis and connected by links, where the stent has one or more portals for aligning with and partially expanding into the opening to the side branch vessel. The stent is implanted at a bifurcation so that the main stent section is in the main vessel, and the portal section covers at least a portion of the opening to the side branch vessel. A second stent can be implanted in the side branch vessel and abut the expanded central section to provide full coverage of the bifurcated area in the main vessel and the side branch vessel. Radiopaque markers on the stent and on the tip of the delivery catheter assist in aligning the portal section with the opening to the side branch vessel.

The embolic protection device (10) has an expandable tubular structure supporting a filter mesh material (12). The embolic protection device is compressed to a small diameter for insertion into a patient's aorta, then expanded within the aorta with the filter mesh material positioned to allow blood to enter sidebranch vessels connected to the aorta and to prevent embolic material from entering the sidebranch vessels. The filter mesh material may be configured with waves or undulations (26) for increased surface area and/or with two layers of mesh material to provide additional protection against embolization and to prevent inadvertent occlusion of the sidebranch vessels.

An improved stent design and stent delivery catheter assembly for repairing a main vessel and a side branch vessel forming a bifurcation. The stent includes rings aligned along a common longitudinal axis and connected by links, where the stent has one or more portals for aligning with and partially expanding into the opening to the side branch vessel. The stent is implanted at a bifurcation so that the main stent section is in the main vessel, and the portal section covers at least a portion of the opening to the side branch vessel. A second stent can be implanted in the side branch vessel and abut the expanded central section to provide full coverage of the bifurcated area in the main vessel and the side branch vessel. Radiopaque markers on the stent and on the tip of the delivery catheter assist in aligning the portal section with the opening to the side branch vessel.

An improved stent design and stent delivery catheter assembly for repairing a main vessel and a side branch vessel forming a bifurcation. The stent is advanced to a bifurcation so that the main stent section is in the main vessel, and the portal section covers at least a portion of the opening to the side branch vessel. A low profile catheter having a branch with an inflation balloon and a balloon-less branch are maintained in a joined configuration during delivery of the catheter to the deployment site. Radiopaque markers on the balloon and on the balloon-less shaft enable the longitudinal and rotational orientation of the assembly to be fluoroscopically envisioned. The inflation of the balloon causes the stent to be expanded while the presence of the balloon-less shaft causes the stent's side portal to be opened sufficiently to allow for a subsequent expansion procedure.

Apparatus and method for harvesting selected vessels in the body of a patient include manual manipulation of a rigid dissecting endoscope and the reconfiguration thereof to facilitate tissue dissection and tissue dilation in the formation of an anatomical space about the vessel within which side-branch vessels may be manipulated in preparation for severance and removal of the vessel from the anatomical space.

The invention discloses a plaster which can activate blood circulation to dissipate blood stasis and dispel wind and remove obstruction in the meridians. The plaster is prepared according to a certain weight proportion by a plurality of Chinese medicines such as angelica, rhizoma ligustici wallichii, red sage root, semen persicae, safflower, eupatorium, rhizoma sparganii, zedoary root, leeches, chinese polyphaga, brazilwood, magnolia officinalis, asafetida, frankincense, myrrh, caulis spatholobi, polygonum cuspidatum, resina draconis, radices pseudoginseng, white mustard seed, pangolin, radices gentianae macrophyllae, radix clematidis, aristolochiae mollissimae, long-noded pit viper, wu chia pee, rhizoma homalomenae, herba siegesbeckiae, futokadsura stem, paniculate swallowwort root, yam, rhizoma dioscoreae hypoglaueae, rhizoma et radix notopterygii, chinese ephedra, radix sileris, szechuan aconite, cassia stem, centipedes, earthworms, cortex cercis, scorpion, seed of nuxvomica poison nut, tree peony bark, radix paeoniae rubra, gardenia, phellodendron, radix scutellariae, radix sophorae flavescentis, rhizoma atractylodis, honeysuckle, forsythia, radix semiaquilegiae, fourstamen stephania root, antler, radices morindae, cortex eucommiae, Himalayan teasel root, rhizoma cibotii, fructus broussonetiae, herba taxilli, camphor and musk, etc. The plaster of the invention has the functions of activating of blood circulation to dissipate blood stasis, expelling wind and freeing channel, detumescence by detoxification, eliminating pathogenic heat from the blood, nourishing liver and kidneys and strengthening bones and tendons, etc., and has fast treatment effects and high recovery rate on treating diseases such as arthritis, cervical spondylosis, periarthritis of the shoulder, closed fracture and facial paralysis, etc.

An embolic protection device and medical procedure for positioning the device in the aortic arch is disclosed. The device and method effectively prevent material from entering with blood flow into side branch vessels of the aortic arch. The device is a collapsible embolic protection device devised for temporary transvascular delivery to an aortic arch of a patient, wherein the device has a protection unit that comprises a selectively permeable unit adapted to prevent embolic material from passage with a blood flow into a plurality of aortic side branch vessels at the aortic arch. The protection unit is permanently attached to a transvascular delivery unit at a connection point provided at the selectively permeable unit, and a first support member for the protection unit that is at least partly arranged at a periphery of the selectively permeable unit. In an expanded state of the device, the connection point is enclosed by the first support member or arranged at said support member.

An intraluminal device for placement in a side-branch vessel associated with a main vessel via an ostial region. The intraluminal device includes a stem portion and a toroidal cap portion. The stem portion of the device is placed in the side branch vessel and the toroidal cap portion is placed adjacent to the ostial region.

A method for treating a bifurcated vessel, wherein the bifurcated vessel has a main vessel and a side branch vessel extending from the main vessel. The method includes the steps of: identifying a site in the main vessel and placing a stent at the site in the main vessel. The stent includes a lattice defining a substantially cylindrical configuration having a proximal end portion and a distal end portion, and a middle portion between the proximal end portion and the distal end portion. The lattice is movable from a crimped state to an expanded state. The lattice has a plurality of adjacent hoops. Each hoop has a plurality of adjacent loops, a plurality of bridges connecting adjacent hoops, and a plurality of extensions on at least some portions of the lattice. Each of the hoops and bridges define a cell. The proximal end portion and the distal end portion of the lattice have at least one cell respectively and the middle portion of the lattice has at least one cell. The at least one cell of the middle portion has spacing between adjacent hoops that is greater than spacing between adjacent hoops of the at least one cell of the proximal end portion and the distal end portion respectively. The at least one cell of the middle portion is dilated adjacent the side branch vessel and a surface of the side branch vessel is supported with at least one of the plurality of the extensions by deformably moving the at least one of the plurality of extensions away from the lattice and into contact with the surface of the side branch vessel.

A low profile occlusion catheter having a guiding atraumatic tip that prevents entry of the balloon into collateral vessels. The occlusion catheter system is particularly well suited for use in vascular occlusion and includes a pressure monitoring line to monitor the degree and state of occlusion.