87 results about "Aortic root" patented technology

Methods and apparatus are provided for valve repair or replacement. In one embodiment, the method comprises providing an apparatus having a valve prosthesis, a valve leaflet support and a valve excisor, the apparatus having a first configuration and a second configuration; accessing the aortic root without placing the patient on a heart-lung machine; advancing the apparatus in the first configuration where the valve leaflet support is advanced through a valve, wherein the support is positioned below a valve annulus; expanding the apparatus into a second configuration so that the support will engage the valve; and moving the valve leaflet support and valve excisor together to remove leaflets of the valve. Penetrating members may be advanced into the tissue wherein the penetrating members may act as fasteners to hold the prosthesis in place.

A tiny electrically powered hydrodynamic blood pump is disclosed which occupies one third of the aortic or pulmonary valve position, and pumps directly from the left ventricle to the aorta or from the right ventricle to the pulmonary artery. The device is configured to exactly match or approximate the space of one leaflet and sinus of valsalva, with part of the device supported in the outflow tract of the ventricular cavity adjacent to the valve. In the configuration used, two leaflets of the natural tri-leaflet valve remain functional and the pump resides where the third leaflet had been. When implanted, the outer surface of the device includes two faces against which the two valve leaflets seal when closed. To obtain the best valve function, the shape of these faces may be custom fabricated to match the individual patient's valve geometry based on high resolution three dimensional CT or MRI images. Another embodiment of the invention discloses a combined two leaflet tissue valve with the miniature blood pump supported in the position usually occupied by the third leaflet. Either stented or un-stented tissue valves may be used. This structure preserves two thirds of the valve annulus area for ejection of blood by the natural ventricle, with excellent washing of the aortic root and interface of the blood pump to the heart. In the aortic position, the blood pump is positioned in the non-coronary cusp. A major advantage of the transvalvular VAD is the elimination of both the inflow and outflow cannulae usually required with heart assist devices.

An aortic root prosthesis for being implanted into a patient during a valve sparing surgery as a replacement for a biological aortic root segment of an ascending aorta is disclosed. The aortic root prosthesis includes a hollow, annular tube having proximal and distal ends, and an inner and outer wall. The distal end is for being attached to the ascending aorta. A plurality of sinuses are circumferentially connected to the proximal end of the tube. Each of the sinuses is adapted for being attached to the aortic wall. Each of the sinuses also includes contouring means for imparting a convex contour to an outer wall of the sinus to thereby create a space between the open leaflet and its respective sinus to prevent impact between the leaflet of the valve and the inner wall of the sinus.

A medical imaging device and a method for providing an image representation supporting inaccurate positioning of an intervention device in a vessel intervention procedure is proposed. Therein, an anatomy representation (AR) of a vessel region of interest and at least one angiogram X-ray image (RA) and a live fluoroscopy X-ray image (LI) are acquired. The following steps are performed when a radio-opaque device is fixedly arranged within the vessel region of interest: (a) registering the anatomy representation to the at least one angiogram X-ray image in order to provide an anatomy-angiogram-registration (R1); (b) processing (DP) the at least one angiogram X-ray image and the at least one live fluoroscopy X-ray image in order to identify in each of the X-ray images the radio-opaque device; (c) registering (R2) the at least one angiogram X-ray image to the at least one live fluoroscopy X-ray image based on the identified radio-opaque device in order to provide an angiogram-fluoroscopy-registration; and (d) combining the anatomy-angiogram-registration and the angiogram-fluoroscopy-registration in order to provide an anatomy-fluoroscopy-registration (GTC; RALC). Finally, an image representation resulting from the anatomy-fluoroscopy-registration showing an overlay of live images with the anatomy representation may be output thereby helping a surgeon to accurately position for example a synthetic aortic valve within an aortic root of a heart.

A method and system for isolating the heart in a 3D volume, such as a cardiac CT volume, for patients with coronary artery bypasses is disclosed. An initial heart isolation mask is extracted from a 3D volume, such as a cardiac CT volume. The aortic root and ascending aorta are segmented in the 3D volume, resulting in an aorta mesh. The aorta mesh is expanded to include bypass coronary arteries. An expanded heart isolation mask is generated by combining the initial heart isolation mask with an expanded aorta mask defined by the expanded aorta mesh.

An implantable, flat-woven multi-petaled graft includes (i) a hollow tubular woven portion having opposed first and second tubular ends, the woven portion having a number of warp yarns interlaced with a number of fill yarns in a flat-woven tubular woven pattern to define a flat-woven tubular diameter, and (ii) a bulbous woven portion having opposed first and second ends, the first bulbous end having a greater number of warp yarns interlaced with the fill yarns in a flat-woven tubular bulbous pattern contiguously woven from the second tubular end to provide a seamless woven, wherein the greater number of warp yarns are threadingly engaged with the fill yarns to define a flat-woven bulbous diameter; wherein the second end of the bulbous portion is scalloped with a plurality of petal-like projections seamlessly woven from the first bulbous end. The graft may include three petal-like projections. The bulbous woven section may be truncated, i.e., hemispherically or hemibulbously shaped

An exemplary two-stage prosthetic heart valve system has a radially expandable base stent implanted within a native valve annulus. The two-stage heart valve system also has a valve component that is delivered to and mounted within the base stent in a separate or sequential operation after the base stent has been anchored within the annulus. The valve component in certain embodiments comprises a hybrid valve component that includes a conventional, non-expandable surgical valve that is modified to include an expandable coupling stent that can be expanded to engage the inner surface of the base stent, thereby anchoring the valve component to the base stent. In its expanded configuration, the outflow end portion base stent has tri-lobular shape that closely conforms to the shape of the aortic root and a support ring of the prosthetic valve that is mounted within the base stent.

A simulated heart valve root used for training physicians in techniques of implantation of prosthetic heart valves as well as for more realistically testing the efficacy of prosthetic heart valves. The simulated heart valve root is made of the flexible, tubular body having an inner wall defining an annular ledge within which the prosthetic heart valve is implanted. Discrete nodes or areas of simulated calcification may be provided on the annular ledge. A simulated aortic root includes alternating cusps and commissures with calcification simulated at least at one of the commissures. A tear in the annular ledge may also be provided which simulates a tear that might occur from a valvuloplasty procedure. A reinforcing sleeve may surround the flexible tubular body to provide rigidity or hoop strength thereto. A method of testing includes mounting the simulated heart valve root in a flow conduit, implanting a prosthetic heart valve in the root, applying pulsatile flow to the assembly, and monitoring for leaks. The simulated heart valve root may also be incorporated within a larger simulated heart for use in training physicians to remotely implant prosthetic heart valves.

A new aortic root replacement graft or apparatus is disclosed and method for making and using same. The graft or apparatus includes a substantially straight and uniform cylindrical conduit having an outwardly flared end section so that a diameter of the cylindrical section is less than a diameter of a distal end of the flared end section.

An intervention type aorta blood pump for ischemic heart diseases and an installation method thereof belong to the technical field of bioengineering. The intervention type aorta blood pump is composed of an aorta blood pump (2) and an aorta blood pump outer support (1), wherein the aorta blood pump (2) is in a cylinder shape and can penetrate through the aorta blood pump outer support (1). When the intervention type aorta blood pump is installed, thoracic surgery is avoided, the intervention type aorta blood pump can be pushed between an aortic root and an arcus aortae from the far end through a cathode, the intervention type aorta blood pump can be fixed in an aorta vessel though vessel outer ligation technology, and the intervention type aorta blood pump can be transplanted matched with coronary artery bypass grafting. The intervention type aorta blood pump can obviously improve coronary artery infusion amount and myocardium blood supply conditions.

A surgical tool for visually assessing or measuring the aortic structures contained within a generally tubular aortic root. The surgical tool is appropriately configured and sized to be insertable within an aortic root during surgery. The surgical tool comprises a handle portion and a cylindrical portion connectable thereto. The cylindrical portion defines an external cylindrical surface and extends in height along a tool axis between a base portion and a top portion. The cylindrical portion being optically clear or having at least a section thereof that is sufficiently transparent whereby, in use, when the surgical tool is placed within the aortic root and the aortic structures are in contact with the external cylindrical surface, the aortic structures are visible through said optically clear or sufficiently transparent section. The cylindrical portion preferably further comprises an array of reference datum and measurement increments visible through the optically clear section such that the visualization and measurement of the aortic structures may be effected with reference to the array.

An cardioplegic fluid delivery catheter includes an expandable member for occluding the ascending aorta of a patient. A length of the catheter allows the distal end to be within the ascending aorta while the proximal end extends from a peripheral artery. The delivery catheter has a multi-lumen construction with a primary lumen extending configured to allow a cardioplegic fluid to be delivered to the aorta. Secondary lumens provide for balloon inflation and aortic root pressure monitoring. The delivery catheter includes a shaft having a pre-determined curve profile at a distal end of the delivery catheter. The pre-determined curve profile generally corresponds to the curve of the bottom surface of the aortic arch. The shaft may be eccentric to the expandable member such that retraction of the shaft causes a distal tip to be parallel within the ascending aorta.

The invention discloses an aortic valve semi-automatic segmentation method based on a CTA dynamic image, and the method comprises the steps: obtaining CT angiography image data under electrocardio gating, carrying out the division of 20 time phases, and carrying out the following steps for an image of each time phase point: step A, segmenting Valsalva sinus according to the upper and lower boundaries of the root of an aorta; and step B, segmenting the aortic valve from the Valsalva sinus. According to the method, the feature extraction range in the CTA image is expanded, so that more completeanatomical details are presented, and the working efficiency and safety during an operation are further improved.

The invention discloses an artificial polymer aorta valve, belongs to the technical field of medical instruments, and particularly belongs to angiocarpy implantation materials. The artificial polymer aorta valve comprises three valve leaflets and a valve ring. The valve leaflets are fixed to the valve ring, and the valve ring is sutured to the human aortic root in a valve replacement operation. The valve leaflets have the function of controlling blood to move in one direction under the drive of differential pressure. According to the diameter of the aorta valve ring of a patient, the artificial polymer aorta valve of the proper size is selected. The artificial polymer aorta valve has the advantages that the artificial polymer aorta valve is suitable for replacing the human aorta valve; stress borne by the free edges of the valve leaflets, the coaptation area, the connecting positions of the valve leaflets and the aortic root and the middles of the valve leaflets is increased in sequence; the middles of the valve leaflets are thinnest and bear the largest deformation, and therefore the performance of the materials can be achieved fully; the service life of the valve is prolonged in the high circulating bending force bearing environment; the artificial valve is designed according to the anatomical structure of the human aorta valve, and the blood flows through the valve in the excellent hemodynamic environment.