37 results about "False lumen" patented technology

The invention discloses an image recognition and enhanced CT image generation method based on a plain-scan CT image. The method comprises the following steps: acquiring an NCE-CT image and CE-CT image pairing data set; calculating hemodynamic parameters of the aortic true cavity by using CFD, and obtaining physical prior features through feature selection; constructing and training a PIAD deep learning model; the PIAD deep learning model comprises an encoder guided by physical prior features through a cross attention mechanism, a Transform global information extraction module, and three functional heads for respectively outputting a classification result, a CE-CT image and a segmentation mask; training a PIAD deep learning model; and applying the trained PIAD deep learning model to a reasoning stage of only inputting an NCE-CT image, and synchronously obtaining a corresponding CE-CT image, a true cavity and false cavity segmentation result and an aortic dissection recognition result. According to the method, physical prior information is integrated, and a real cavity and false cavity segmentation task and a CE-CT generation task are combined, so that complementary information of NCE-CT and CE-CT is effectively utilized, and dependence on expensive and complex CE-CT equipment is reduced.

An embodiment includes a system comprising: a backbone; a first polyurethane shape memory polymer (SMP) foam on the backbone; a second polyurethane SMP foam on the backbone; a third polyurethane SMP foam on the backbone and between the first and second SMP foams. Other embodiments are described herein.

The application discloses a kind of false cavity plugging device, assembly and system, belong to medical instrument technical field, wherein false cavity plugging device includes elastic membrane and elastic support, elastic support includes warp beam and weft beam, warp beam is continuously bent wave shape, warp beam is equipped with weft beam, and weft beam can be bent into annular ring.Assembly includes release device and false cavity plugging device.System includes conveying device and false cavity plugging assembly, and conveying device includes sheath and guide wire, and sheath is equipped with guide wire passage and conveying passage.Weft beam bends into annular ring can make elastic membrane roll up, reduce the size in width direction, to be contained in sheath, after being separated from sheath, weft beam will be re-opened and contacted with the inner wall of artery dissection, and can be implanted, in the whole process of being received and being separated from sheath, elastic membrane does not have length direction change, and preset release position and actual release position can be kept consistent, reduce the operation requirement to operator, and it is beneficial to popularization and use.

The application relates to a closure stent and a closure system, the closure stent comprising a covered stent and a one-way valve component, the one-way valve component being arranged in a hollow cavity or / and an extension cavity of the covered stent, the one-way valve component comprising a connecting section and a free section connected with each other, and the one end of the connecting section away from the free section being connected to the covered stent in a circumferential direction, the closure stent comprising a developing element, the distal end of the connecting section being in a strip shape, the strip shape comprising a long axis and a short axis, and the axial section defined by the two ends of the long axis being a first section; the developing element comprising a first developing element and a second developing element, and the connecting line of the developing points of the first developing element and the second developing element being substantially parallel to the diameter in the radial section of the covered stent. The closure stent provided by the application has a better closure effect, prevents blood backflow, and avoids continuous expansion and even rupture of a false lumen.

The application provides an aortic dissection rupture sealing device, which comprises a body having a hollow flow channel extending along the axial direction of the body, the hollow flow channel penetrating the rupture for conducting the true lumen of the aorta and the branch blood vessel, and the body being used for connecting a stent located in the branch blood vessel; and an anchoring part arranged on the body and surrounding the hollow flow channel, and anchored to the surrounding intima at the rupture, so as to prevent the fluid from conducting between the true lumen and the false lumen formed at the rupture. By using the above scheme, the rupture sealing effect can be improved, the continuous expansion of the false lumen caused by the incomplete rupture sealing and the residual liquid leakage can be avoided, and the blood supply stability of the branch blood vessel can be ensured, so that the blood supply demand of the internal organs, the spinal cord and the like supplied by the branch blood vessel can be met.

The application provides an aortic dissection rupture sealing device, which comprises an anchoring part, a hollow flow channel, and an intima around the rupture, so as to prevent the fluid communication between the true lumen of the aorta and the false lumen formed at the rupture; a stent, which is adjustably coupled to the anchoring part, has a connecting end and a free end, and at least the free end of the stent is located in a branch blood vessel; and the stent has a hollow structure in communication with the hollow flow channel and is supported in the branch blood vessel to communicate the true lumen and the branch blood vessel. The above scheme can avoid the continuous expansion of the false lumen caused by the incomplete sealing of the rupture and residual shunt, and at the same time, the blood supply of the blood vessel channel is retained to ensure the stability of the blood supply of the branch blood vessel, which is beneficial to meet the blood supply demand of the internal organs, spinal cord and the like supplied by the branch blood vessel.

The utility model discloses a cutting balloon, it includes: push rod, balloon head and inflation pipeline, the balloon head fixed setting in push rod one end, push rod is used for adjusting the balloon head reaches corresponding position, the balloon head sets up blade, inflation pipeline with balloon head intercommunication, through inflation pipeline to balloon head inflation, the balloon head inflation will the blade push out, to execute cutting action. The cutting balloon of the utility model can solve the problem that the middle occlusion section is located in the subintimal false lumen.

Devices and methods to treat a diseased portion of an aorta. A method of implanting an endoprosthesis within the aorta may include positioning the endoprosthesis within the aorta in a collapsed state with a constraint and deploying the endoprosthesis to the deployed diameter. The aorta has a true lumen and a false lumen due to the aorta having a defect, the true lumen defining a true lumen diameter and the false lumen formed by a false lumen wall defining a false lumen diameter. The deployed diameter of the endoprosthesis is such that the endoprosthesis extends along the true lumen and along at least a portion of the false lumen at a position where the defect is located in the aorta such that the endoprosthesis defines a flow bypass through a diseased portion of the aorta.

The invention provides an opening device for chronic internal carotid artery occlusion, and relates to the technical field of medical instruments. The opening device comprises a guide wire catheter and a guide wire body arranged in the guide wire catheter in a penetrating manner; the expansion and contraction assembly is arranged on the guide wire catheter, clamps the guide wire body in an expansion state and abuts against the inner wall of the blood vessel; the expansion and contraction assembly comprises a flow guide interlayer arranged in the side wall of the guide wire catheter, an outer-layer expansion and contraction film arranged on the outer side of the far end of the guide wire catheter and communicated with the flow guide interlayer, and an inner-layer expansion and contraction film arranged on the inner side of the far end of the guide wire catheter. A communicating hole communicating an inner cavity of the outer-layer expansion and contraction film with an inner cavity of the inner-layer expansion and contraction film is formed in the guide wire catheter. The outer swelling and shrinking film is tightly attached to the periphery of the blood vessel wall after being swelled, and clamping of the guide wire catheter is achieved; the inner-layer swelling and shrinking film abuts against the side wall of the guide wire body after being swelled, clamping of the guide wire body is achieved, the guide wire body is supported in the radial direction, the guide wire body is kept in the middle of a blood vessel, and the possibility that the guide wire enters a false cavity is reduced.

This invention provides an information processing device, an information processing method, and an information processing program that can support the diagnosis of arterial dissection. [Solution] The information processing device 10 includes a processor, which acquires an input image including blood vessels, generates path information indicating the blood flow path based on the input image, identifies at least the starting position of the arterial dissection based on the path information, and determines the true lumen and false lumen of the arterial dissection based on the path information within a range set according to the starting position.

This invention provides a method, electronic device, and storage medium for detecting the location of aortic dissection ruptures. Based on an image of the aorta to be detected and its true and false lumen mask images, a first search starting layer is determined according to a first search rule. Then, based on the first search starting layer and the true and false lumen mask images, the location of the aortic dissection rupture is calculated according to a second search rule. The method, electronic device, and storage medium provided by this invention can improve the detection efficiency and accuracy of aortic dissection rupture locations. Furthermore, the algorithm is simple, efficient, and has strong generalization ability, achieving fully automated detection of aortic dissection rupture locations, and is easy to implement. In addition, the method provided by this invention can determine a second search starting layer and the aortic arch location according to a third search rule, and calculate the rupture initiation location of the aortic dissection according to the second search rule, further improving accuracy.

This invention relates to a vascular stent for the visceral region of the abdominal aorta, comprising an interconnected proximal non-degradable segment and a distal degradable segment. The proximal non-degradable segment includes a non-degradable metal skeleton and a covering structure. The distal degradable segment is a degradable bare skeleton. The proximal non-degradable segment corresponds to the location of the primary tear in the visceral region of the abdominal aorta, and the distal degradable segment corresponds to the location of branch vessels in the visceral region of the abdominal aorta. This invention is applicable to abdominal aortic dissection anatomical features, where the proximal stent segment is non-degradable and covered, while the distal visceral segment is degradable but not covered. It promotes false lumen thrombosis by sealing the primary tear through covering, while maintaining patency of branch vessels in the visceral segment by not covering. Simultaneously, a drug layer is attached to the covering of the proximal stent segment to actively promote intimal repair.

The invention relates to an aortic dissection blocking membrane (10) comprising a blocking membrane arranged to be placed in a false lumen of an aortic arch (1) associated with an aortic dissection, wherein the blocking membrane is arranged to provide a blockage to the free flow of blood in the false lumen by being foldable and / or by comprising a plurality of protrusions (11). The invention further relates to an aortic dissection system for treating blood flow within a false lumen of an aortic arch (1) associated with an aortic dissection.

The plugging device and plugging system provided by the present invention are used for targeted plugging of distal ruptures, and include an anchoring and supporting component and an elastic component. The elastic component is sleeved on the anchoring and supporting component. Wherein, the elastic component includes an elastic bag and a graft. The elastic bag wraps the anchoring and supporting component, and the elastic bag has an opening. The graft is used to be loaded into the elastic bag from the opening. By wrapping the anchoring and supporting component with the elastic bag, and the elastic bag having an opening, and the graft being used to be loaded into the elastic bag from the opening, the present invention can adapt to the characteristics of high blood pressure and fast blood flow in the false lumen of aortic dissection. The plugging device can effectively plug the blood flow in the false lumen, and there is no risk of displacement after implantation, reducing the occurrence of endoleak, with a high treatment success rate, and also reducing the physical damage to the inner wall of the false lumen in the tail section located in the false lumen.

An implantable medical device for preventing backflow into a false lumen of dissection includes an elongate support member, an elongate flexible tubular valve member having a length, a proximal end, and an open distal end. At least one elongate resilient member extends at least partially along the length of the elongate flexible tubular valve member, the at least one elongate resilient member having a proximal end distal to the elongate support member, a distal end proximal to the open distal end of the elongate flexible tubular valve member, an elongated configuration, and a coiled configuration. The at least one elongate resilient member is unattached to the elongate support member. The at least one elongate resilient member, upon release from a constraining force, is configured to move from the elongated configuration to the coiled configuration thereby closing the open distal end of the elongate flexible tubular valve member.

The invention relates to a balloon, a balloon delivery system and application of the balloon, the balloon is provided with a fillable inner cavity, the fillable inner cavity of the balloon is configured to be used for being filled with a filling substance, and the filling substance can be solidified from a liquid state to a solid state. According to the balloon conveying system, after the balloon in the contraction state is conveyed to the designated position in the body, the filling material in the liquid state can be solidified into the solid state in the inner cavity capable of being filled of the balloon, and the balloon can be shaped after solidification is completed, so that the balloon can adapt to the shape of the surrounding environment; the shape matched with the surrounding environment is automatically constructed, so that blood flow at the designated position can be fully and effectively blocked, and thrombosis in an interlayer false cavity, an intravascular stent peripheral internal leakage area or an aneurysm is promoted.

A pseudo-twin self-adaptive aortic dissection segmentation method and system across centers CTA, the method comprising: acquiring standardized three-dimensional CTA volume data; generating an aortic center of interest volume based on the standardized three-dimensional CTA volume data and aortic anatomical prior; performing overlapping three-dimensional block sampling within the aortic center of interest volume to generate a plurality of three-dimensional image blocks that overlap each other; inputting the three-dimensional image blocks into a three-dimensional segmentation network; constructing a block body joint loss to train the three-dimensional segmentation network; performing source domain style alignment on a low-frequency amplitude spectrum of a target domain CTA image through a Fourier style transformation; constructing a pseudo-twin self-adaptive network, including a source domain reference branch and a target domain adaptive branch; inputting the style-aligned target domain CTA image into the pseudo-twin self-adaptive network for prediction; fusing the prediction results of the source domain reference branch and the target domain adaptive branch to output three-dimensional segmentation results of the true lumen and the false lumen.

An aortic septotomy device for cutting aortic tissue between a true lumen and a false lumen. The aortic septotomy device having a handle device having a jaw actuator member and an optional cutter actuator member; a distal head assembly having a pair of jaw members movable between an opened position and a clamping position and a cutting mechanism movable within a channel; and a sheath member extending from the handle device to the distal head assembly; wherein at least one of the pair of jaw members is movable in response to actuation of the jaw actuator member to selectively grasp aortic tissue, and the cutting mechanism is movable within the channel in response to actuation of the cutter actuator member to cut at least a portion of the aortic tissue while the pair of jaw members grasps the aortic tissue.

The invention relates to the technical field of medical instruments, and discloses a form-adaptive aortic dissection false cavity or aneurysm cavity thrombosis promoting embolism device which comprises a double-layer metal grid spindle-shaped skeleton of a hollow structure. Comprising a connecting point at the upper end and the lower end and an arc-shaped side face connected between the two points. The isolating membrane is located between the double-layer metal grid fusiform skeletons, and the double-layer metal grid fusiform skeletons are small in size after being compressed, can be quickly released and automatically adapt to the shape of an aortic dissection false cavity or an aneurysm cavity, so that the aneurysm cavity or the false cavity is fully blocked, and thrombosis of the aneurysm cavity or the false cavity is promoted. The device is simple in structure, convenient to operate, capable of adapting to the shape of an interlayer false cavity to be fully filled, good in blood flow isolation effect, capable of rapidly promoting thrombosis and remodeling of the false cavity, free of reverse compression of a true cavity and capable of being applied to occasions where embolism needs to be conducted on abdominal aortic aneurysm cavities and other branch arteries.

The present application provides an intraluminal occluder, comprising: a reticular skeleton having a hollow structure, the reticular skeleton including two end faces and a side face connected between the two end faces; a flow-blocking membrane formed on the reticular skeleton, the flow-blocking membrane including two end faces and a side face connected between the two end faces; and a thrombosis-promoting member formed on the surface of the intraluminal occluder; wherein the side faces of the reticular skeleton and / or the side faces of the flow-blocking membrane are concave and convex surfaces. The intraluminal occluder of the present application has a smaller size after compression, can quickly release and occlude a false lumen, and can promote thrombosis of the false lumen.

The present invention relates to a tracheostomy tube obturator inserted into the tracheostomy tube so as to close the tracheostomy tube. According to the tracheostomy tube obturator of the present invention, the tracheostomy tube obturator comprises an endoscope, which is inserted into the tracheostomy tube, has a monitor mounted and fixed to the distal end thereof, has a camera module and a lighting module provided at the proximal end thereof, integrally extends from the monitor and is exposed to the proximal end of the obturator, so that, when the tracheostomy tube is replaced, the monitor stably monitors from the insertion point of the neck to the inside of the trachea so as to prevent the tracheostomy tube from entering a false lumen, and prevents damage to surrounding tissue and blood vessels so that fatal accidents due to complications can be prevented.

The invention relates to an aortic dissection blocking membrane (10) comprising a blocking membrane arranged to be placed in a false lumen of an aortic arch (1) associated with an aortic dissection, wherein the blocking membrane is arranged to provide a blockage to the free flow of blood in the false lumen by being foldable and / or by comprising a plurality of protrusions (11). The invention further relates to an aortic dissection system for treating blood flow within a false lumen of an aortic arch (1) associated with an aortic dissection.

An embodiment includes a system comprising: a backbone; a first polyurethane shape memory polymer (SMP) foam on the backbone; a second polyurethane SMP foam on the backbone; a third polyurethane SMP foam on the backbone and between the first and second SMP foams. Other embodiments are described herein.

The invention relates to the technical field of follow-up visit adjustment, in particular to an imaging follow-up visit system after aortic dissection repair. The system comprises an image acquisition module which is used for acquiring and identifying an aorta area of a blood vessel cross section image in follow-up visit; the image registration module is used for registering the adjacent aorta areas in follow-up visit; the false cavity expansion analysis module determines a false cavity region and quantifies the area and the extension direction change of the false cavity to obtain an expansion index; the false cavity recovery evaluation module obtains a remodeling index through false cavity area distribution and stability of an expansion index in combination with true cavity area gray level distribution, and obtains a false cavity recovery index through remodeling time sequence change in combination with an initial false cavity serious condition; the follow-up adjustment module adjusts the follow-up interval based on the false cavity recovery index. According to the method, the aorta area in multiple follow-up visit is registered, the influence of the expansion degree and direction of the false cavity on recovery stability is analyzed, the recovery condition of the false cavity is evaluated, the follow-up visit strategy is adjusted, and a more reasonable and reliable adjustment scheme is provided.

Devices and methods to treat a diseased portion of an aorta. A method of implanting an endoprosthesis within the aorta may include positioning the endoprosthesis within the aorta in a collapsed state with a constraint and deploying the endoprosthesis to the deployed diameter. The aorta has a true lumen and a false lumen due to the aorta having a defect, the true lumen defining a true lumen diameter and the false lumen formed by a false lumen wall defining a false lumen diameter. The deployed diameter of the endoprosthesis is such that the endoprosthesis extends along the true lumen and along at least a portion of the false lumen at a position where the defect is located in the aorta such that the endoprosthesis defines a flow bypass through a diseased portion of the aorta.

The present application relates to a kind of method and system for quantitatively analyzing aortic dissection chiral topography, belong to image processing technical field.Method includes: obtaining the image of enhanced CT angiography of aortic dissection patient in lying state;Based on the image of enhanced CT angiography, distinguish the true lumen and false lumen of aortic dissection;The chiral topography of the dissection image is measured, and measurement result is obtained;Based on the measurement result, the chiral topography of aortic dissection is quantitatively analyzed.The method is simple to operate, and operability is strong, it is convenient for clinician or technical personnel to understand and master, can relatively accurately describe the change characteristics of dissection spiral morphology.

The present invention relates to a method, a computing device, and a medium for determining the blood pressure of the true and false lumens of a blood vessel. The method includes: obtaining fluid correlation data of the blood vessel of a detection object, where the fluid correlation data at least indicates blood pressure and / or flow rate; determining the blood pressure and flow rate of boundary discrete points in a blood vessel reconstruction model based on the reference relationship of the blood pressure, flow rate, and time of the blood vessel and the obtained fluid correlation data, where the boundary discrete points include inlet discrete points and outlet discrete points; determining a blood vessel pressure distribution model based on the blood vessel reconstruction model and the determined blood pressure and flow rate of the boundary discrete points; and determining prediction data regarding the true lumen blood pressure and false lumen blood pressure in the blood vessel based on the determined blood vessel pressure distribution model. The present invention can reduce the cost of determining blood pressure and avoid harm to the detection object, and at the same time can accurately and comprehensively reflect the pressure conditions of the true and false lumens of the blood vessel.

The present invention discloses a device and assembly for fusion of the true and false aortic lumens, belonging to the field of medical device technology. The device comprises a fusion catheter and a drive mechanism. The fusion catheter is provided with a first lumen and a second lumen. The proximal sidewall of the second lumen is provided with a knife exit, a cleavage knife hingedly connected to the knife exit, and a drive mechanism for rotating the cleavage knife. The sidewall of the second lumen is provided with a guide hole. The assembly comprises a guidewire superselection device and the aforementioned aortic true and false lumen fusion device. The guidewire superselection device comprises a magnetic head, a hose, a handle, and a drifting umbrella. The magnetic head is provided with a guidewire hole, which is connected to the hose. The hose has a hollow interlayer in its wall. The handle is provided with a guidewire lumen and an injection lumen, which is connected to the distal lumen of the hose. The injection lumen is connected to the hollow interlayer. The drifting umbrella is mounted and fixed on the proximal outer wall of the hose. The device can effectively incise the intima and media, and the incision is smooth. The patient's vascular lining recovers quickly without causing the dislodgment of mural thrombi.

The catheter assembly for slitting a dissection membrane of an aorta of a patient includes a first catheter configured to be inserted into a true lumen located on a first side of the dissection membrane a second catheter configured to be inserted into a false lumen located on a second side of the dissection membrane, and an electrically conductive wire electrically conductively joined to the first and the second catheters. The wire is further configured to be energized with electrical current such that the dissection membrane can be slit by the wire A method is also provided.