140 results about "Aorta part" patented technology

A valve delivery device is provided. The device comprises a heart valve prosthesis support having a proximal portion and a distal portion; a plurality of fasteners ejectably mounted on the support; a heart valve prosthesis being releasably coupled to said distal portion of said heart valve prosthesis support; and where the heart valve prosthesis and support are configured for delivery to the heart through an aortotomy formed in the patient's aorta. The device may include an anvil movable along a longitudinal axis of the device to engage tissue disposed between the anvil and the valve prosthesis.

An apparatus and method for connecting a first conduit to the heart without the need for cardiopulmonary bypass. The first conduit may then be attached to a second conduit that has a prosthetic device interposed. The second conduit may be connected to the aorta prior to the first conduit being attached to the heart. The prosthetic device may be a prosthetic valve or a pump, for example. The apparatus of the present invention includes an implantable connector with first conduit component, a retractor expansion component, a coring component, and a pushing component. The retractor expansion component is slide-ably coupled to the coring component. The retractor expansion component serves to seat against and separate the inside apical wall of the left ventricle so that the coring component may cut cleanly through the myocardium to form a tissue plug without leaving any hanging attachments to the inside walls. By remaining seated against the inside wall, the retractor expansion component follows the tissue plug into the coring component. The surgeon applies force and rotary motion to the pushing component sufficient to cut the tissue plug and implant the prosthetic component.

The present invention concerns a cardiac valve prosthesis system (10; 40) for implantation into the body of a mammal. The prosthesis system (19; 40) comprises a valve (16) mounted on an stent element (18) to form a stented valve element (12), and an anchoring element (14) to be arranged within the aorta of the mammal to be treated with the prosthesis and spaced-apart form the stented valve element (12). Further, the anchoring element (14) comprises a cylindrical tube element composed of fabric (22) supported by a metal mesh, and the stented valve element (12) and the anchoring element (14) represent two constructional distinctive elements being associated by ligament-like connecting means (30; 50), such, that the connecting region (28) between the stented valve element (12) and the anchoring element (14) is generally free from foreign material.

The present invention provides a system and method for forming a side branch on a hollow vessel, such as the aorta. The side branch is preferably adapted to be connected to a connector conduit, but any other suitable use is also acceptable. The system comprises a graft including a side branch portion, and an applicator comprising a hole forming element adapted to form a hole in the wall of the vessel and an insertion element adapted to be inserted through the wall of the vessel, the insertion element comprising a retraction element adapted to enter into engagement with the graft. The hole forming element may comprise a cutting element adapted to cut a hole in the wall of the vessel, and a positioning element adapted to hold the position of the applicator relative to the vessel. The system further comprises a graft protection element adapted to prevent the graft from being damaged by the cutting element. In this case, the clamping element and the graft protection element may be the same element, for example, an expansion element, which may be expandable from an unexpanded state to fully expanded state and to a partially expanded state. The expansion element may be a balloon, which may be in the shape of a circular toroid, and may include a tension member that restricts the dimensions of the balloon. In addition, the expansion element may be an umbrella mechanism.

This invention relates to an implant, implant tools, and an implant technique for the interposition of an extracardiac conduit between the left ventricle of a beating heart and the aorta to form an alternative one-way blood pathway thereby bypassing the native diseased aortic valve. The implant consists of a hollow conduit having a first end opening, a second end opening, and a one-way valve located between the end openings. The valve is biased to allow one-way flow from the second end opening to the first end opening. A first slit opening is located between the first end opening and the valve and a second slit opening is located between the second end opening and the heart valve. The implant tools consist of a vessel wall cutting tool and a heart wall piercing and dilating tool. The vessel wall cutting tool is sized to closely fit through the implant's first slit opening and the first end opening. The heart wall piercing and dilating tool is sized to closely fit through the implant's second slit opening and the second end opening. The implant technique allows the surgeon to safely connect the implant between a heart chamber and a blood vessel without stopping the heart or impeding flow in the blood vessel.

A system for making a precise incision and circular hole in a vessel wall, such as the aorta, that eliminates lateral side notches from the aortotomy. In one aspect, the system includes a surgical knife or lancet having a blade surrounded by a retractable shield. In one aspect, the system includes a tissue punch having a rotating circumferential edge for receiving a parabolic-shaped anvil having an anvil cutting edge. The anvil is placed through an incision made by a knife and actuated to produce a hole in the vessel wall.

The invention discloses a method for forming an aortic stent graft. The method comprises the following steps: acquiring an image of aorta, and extracting a three-dimensional (3D) model of the aorta according to the image; extracting diameter characteristics of the aorta in the axial direction of the aorta of the 3D model; reconstructing an aortic vascular model according to the extracted diameter characteristics; 3D-printing a water-soluble vascular inner core according to the aortic vascular model; dip-coating a polymer film on a surface of the water-soluble vascular inner core; spirally weaving a metal mesh outside the treated water-soluble vascular inner core as a metal stent; bonding the polymer film and the metal stent, and then removing the water-soluble vascular inner core to obtain the aortic stent graft. The method provided by the invention can efficiently and accurately manufacture a vascular stent graft according to the actual size of a thoracic descending aorta of a patient based on a 3D printing technology, can effectively solve a detect that an existing equal-diameter vascular stent does not match a true vascular size of the patient, provides an effective medical means for treatment of acute vascular aneurysm, and has important clinical value.

A generally tubular stent-graft (20) includes a generally tubular support element (30) and a covering element (32) that is attached to and at least partially covers the support element (30). When the stent-graft (20) is unconstrained in a radially-expanded state, a proximal end portion (40) of the covering element (32) is shaped so as to define at least first and second proximally-extending pieces (42A, 42B). When the stent-graft (20) is unconstrained in the radially-expanded state and the proximally-extending pieces (42A, 42B) are fully proximally extended, the proximally-extending pieces (42A, 42B) (a) are shaped so as to define respective distal bases (46), which (i) have respective base lengths (L1) measured circumferentially around the stent-graft (20), and (ii) circumferentially circumscribe respective base arcs (a) of between 100 and 140 degrees, (b) are shaped so as to define respective proximal-most portions (48) more proximal than all other respective portions of the covering element (32) that circumscribe the respective base arcs (a), and (c) have respective axial lengths (L2) that equal between 50% and 150% of the respective base lengths (L1).

In a method and a magnetic resonance system for determining the position and/or orientation of the image plane of slice image exposures of a vessel region in a contrast agent bolus examination, in particular in the region of the aorta bifurcation or the aorta arch, wherein the image plane traverses the vessel region in the longitudinal section, initially a group of slice image exposures disposed essentially orthogonal to the vessel is automatically acquired from different planes of the vessel region lying parallel to one another, and the image regions showing the vessel region are automatically determined within the orthogonal slice image exposures in an image-processing device, and using the determined image regions the spatial position of the vessel region is determined. The position and/or orientation of the image plane disposed essentially orthogonal to the planes of the slice image exposures and traversing the vessel region in the longitudinal section is determined automatically using the position information, such that the image plane lies in the center of the vessel region.

A method of deriving a quantitative measure of a degree of calcification of a blood vessel such as an aorta by processing an image such as an X-ray image of at least a part of the blood vessel containing said calcification comprises: taking a starting set of digital data representative of an image of at least part of a blood vessel containing a calcification set against a background; estimating the boundary of the calcification; using inpainting to replace digital data in said starting set representing the calcification with data extrapolating the boundary of the background to extend over the area of calcification, and so generating an inpainted set of digital data; and computing the difference between the starting set of digital data and the inpainted set of digital data to obtain a quantitative measure of the degree of calcification of the blood vessel.

The invention provides an occluder. The occluder comprises a first occluding part and a second occluding part, a connecting bolt is arranged at the far end of the first occluding part along the direction of the second occluding part, a first external thread is arranged on the side wall of the connecting bolt, a protruding part is arranged at the near end of the second occluding part, a through hole is formed in the protruding part, a second external thread is arranged on the side wall of the protruding part, the thread direction of the first external thread is opposite to that of the second external thread, and the near end of the connecting bolt can penetrate through the through hole to be in threaded connection with a nut. The invention further provides an occluder locking system and a locking method thereof. According to the structure of the occluder, efficient, stable and reliable locking can be achieved under the combined action of a pushing device, so that the service life and the occluding effect of the occluder are prolonged, the risk of postoperative complications is reduced, and the occluder is particularly suitable for occluding treatment of aortic dissection crevasses.

The invention discloses a quick-connection thoracotomy vascular stent system. The quick-connection thoracotomy vascular stent system comprises an artificial blood vessel, a laminating membrane stent and a support piece, wherein the laminating membrane stent comprises a stent body and a laminating membrane for covering the outside of the stent body, and the laminating membrane is longer than the stent body; the artificial blood vessel and the laminating membrane for covering the outside of the stent body are integrally woven, and a section of stent-less laminating membrane is arranged between the distal end of the artificial blood vessel and the proximal end of the laminating membrane stent; the support piece comprises a support ring and a tectorial membrane for wrapping the outer layer ofthe support ring; the support ring is located on the outer layer of the stent-less laminating membrane; and the support ring and the distal end of the tectorial membrane are matched on the laminatingmembrane in an anastomosis mode. A conveying system of the thoracotomy vascular stent comprises a conveying rod, a support structure, a conveying handle, a first control component, a second control component, and a fixing band. According to the vascular stent and the conveying system provided by the invention, the anastomosis between the proximal end of the descending aorta and the proximal end ofthe laminating membrane stent placed therein is avoided, and the surgical time is shortened.

The invention relates to the technical field of implantable blood vessel filters, and in particular relates to a partially-covered ascending aorta stent. The partially-covered ascending aorta stent comprises a bare stent body and a covering film, wherein the bare stent body comprises N supporting rings, the covering film covers the bare stent body, a body of the covering film is rectangular, the width w of the covering film is smaller than the perimeter c of the bare stent body, and the length of the covering film is smaller than the perimeter of the bare stent body. The partially-covered ascending aorta stent has the beneficial effects that the front and back position of the covering film can be longitudinally adjusted, the circumferential position of the covering film can be rotatably adjusted, finally, part of the covering film accurately covers a broken opening, then the lesion is treated, meanwhile, the bare stent body plays the roles of fixing the covering film, and supporting and reinforcing an interlayer blood vessel true lumen.

The invention discloses an aortic intracavitary double-horizontal-sacculus blockage pressurized infusion system. The system comprises a main catheter, an aortic arch sacculus, an aortic arch sacculus injecting catheter, an aortic distal sacculus and an aortic distal sacculus injecting catheter, wherein a main catheter infusion outlet is formed in the top end of the main catheter, and the tail end, introduced to the outside of the body, of the main catheter is a first tail end injecting hole; the aortic arch sacculus is connected to the part below the top end of the main catheter; the aortic arch sacculus injecting catheter attaches to the main catheter; the top end of the aortic arch sacculus injecting catheter communicates with the aortic arch sacculus; the bottom end, introduced to the outside of the body, of the aortic arch sacculus injecting catheter is a second tail end injecting hole; the aortic distal sacculus is connected to the middle section part of the main catheter; the aortic distal sacculus injecting catheter attaches to the main catheter; the top end of the aortic distal sacculus injecting catheter communicates with the aortic distal sacculus; and the bottom end, introduced to the outside of the body, of the aortic distal sacculus injecting catheter is a third tail end injecting hole. For the aortic intracavitary double-horizontal-sacculus blockage pressurized infusion system, the rescuing resuscitating success rate for patients suffering from hemorrhagic sudden cardiac arrest can be improved by improving the effective continuous blood perfusion for the important organs including the heart, the brain, the kidney and the like.

The invention relates to the technical field of noninvasive vascular endothelial function measurement and provides a noninvasive vascular endothelial function assessment device. The noninvasive vascular endothelial function assessment device comprises three blood pressure cuffs, a cuff pressure control unit, an inflator pump, two pressure sensors, a signal conditioning and A/D (analog to digital) acquisition circuit, a data processing unit and a display module. Each blood pressure cuff is provided with an independent intake passage with an intake valve and an exhaust passage with an exhaust valve, the intake passage of each blood pressure cuff is connected with the inflator pump, and the inflator pump, each intake valve and each exhaust valve are controlled by the cuff pressure control unit; two pressure sensors are arranged in the exhaust passages of two of the blood pressure cuffs respectively, the two pressure sensors are connected with the signal conditioning and A/D acquisition circuit which is connected with the data processing unit, and the data processing unit is connected with the display module. By the noninvasive vascular endothelial function assessment device, vascular endothelial function measurement based on noninvasive measurement for aortas of both arms can be realized.

The invention relates to a surgical cutting instrument (2) for transapical aortic valve resectioning, which instrument has a cutting unit (6) arranged at the distal end of a tool shaft (4) with at least one mechanical cutting element (16) for executing a circular cut. According to the invention, the at least one cutting element (16) can be adjusted, particularly in a continuously variable manner, to differing aortic diameters by means of a radially displaceable adjusting mechanism.

A minimally invasive circulatory support platform that utilizes an aortic stent pump or pumps. The platform uses a low profile catheter-based techniques and provides temporary and chronic circulatory support depending on the needs of the patient. Further described is a wirelessly powered circulatory assist pump for providing chronic circulatory support for heart failure patients. The platform and system are relatively easy to place, have higher flow rates than existing systems, and provide improvements in the patient's renal function.