218 results about "Aorta part" patented technology

There are provided methods and systems for training and using machine learning (ML) models to determine suitability of a given patient for an endovascular aortic repair (EVAR) intervention and to monitor the given patient after the EVAR intervention. The pre-EVAR ML models are trained on training datasets comprising strain maps having been generated based on a multiphase image stack of the aorta of each respective patient during a cardiac cycle, measures of aortic weakness in the aorta of each respective patient, geometric features of the aorta of the respective patient, and outcomes of the EVAR intervention on the respective patient. The post-EVAR ML models are trained on pre-EVAR strain maps, post-EVAR strain maps having been generated after the EVAR intervention, and a respective outcome of the EVAR intervention.

The systems, devices, and methods presented herein use a blood pump to obtain measurements of cardiac function. The system can quantify the functioning of the native heart by measuring certain parameters / signals such as aortic pressure or motor current, then calculate and display one or more cardiac parameters and heart function parameters, such as left ventricular pressure, left ventricular end diastolic pressure, or cardiac power output. These parameters provide valuable information to a user regarding current cardiac function, as well as positioning and function of the blood pump. In some embodiments, the system can act as a diagnostic and therapeutic tool. Providing cardiac parameters in real-time, along with warnings about adverse effects and recommendations to support cardiac function, such as increasing or decreasing the volumetric flow rate of blood pumped by the device, administering pharmaceutical therapies, and / or repositioning the blood pump allow clinicians to better support and treat cardiovascular disease.

Provided herein is a device for simultaneous intraoperative leak testing and visualisation of a heart valve seat, the device comprising an end cap configured to engage with and to sealingly close an opening of a tubular vascular graft, the end cap comprising a backing portion, a connector portion, a view port, and at least one fluid conduit element, the connector portion comprising a distal end dimensioned for placement inside of the opening, a first fastening element comprising an external thread, a second fastening element comprising an internal thread and configured to be rotated onto the first fastening element, and the external and internal threads are adapted such that the first and second fastening elements are fittingly engaged with the tubular vascular graft scalingly secured therebetween by less than one rotation of the second fastening element around the outer circumference.

The invention discloses a shock wave forming device with a valve blood perfusion function, which relates to the technical field of medical instruments and comprises a catheter sheath, a shock wave forming balloon group, a shock wave generating component, a handle and a magnetic flexible net opening and closing structure. A guide wire is slidably arranged in the catheter sheath; the shock wave forming balloon set comprises a plurality of shock wave balloons, one ends of the shock wave balloons are connected with the end of the guide wire through flexible net-shaped structures, and the other ends of the shock wave balloons are connected with the end of the catheter sheath through flexible rod-shaped structures. The shock wave generating assembly comprises an axial shock wave generating electrode pair and a circumferential shock wave generating electrode pair; and the magnetic type flexible net opening and closing structure is arranged between the guide wire end part and the flexible net-shaped structure. The blood vessel can be mechanically supported or loosened; through the axial shock wave generation electrode pair and the circumferential shock wave generation electrode pair, the blocking plaque can be opened in the forward direction, and shock waves can be emitted in the circumferential direction to crack or crush calcium deposits; in addition, broken calcified plaques or aortic plaques, thrombus and the like can be captured.

A pigtail catheter may include an elongate shaft having a curled distal tip, a tubular sheath slidably disposed over the elongate shaft, and a compliant expandable member fixed to the elongate shaft and the tubular sheath. A transcatheter aortic valve replacement (TAVR) system may include the pigtail catheter, a TAVR delivery device comprising an elongate shaft having an implant holding portion proximate a distal end thereof, and a TAVR implant disposed within the holding portion in a collapsed configuration, the TAVR implant comprising an expandable framework including a lower crown disposed at an upstream end and an upper crown disposed downstream of 10 the lower crown. The compliant expandable member is configured to identify a downstream extent of a surgical aortic valve implant disposed within an ascending aorta prior to deploying the TAVR implant.

The invention discloses a lantern-shaped variable-diameter transcatheter artificial mitral valve stent, and belongs to the technical field of medical instruments. Comprising a lantern-shaped outer stent body and an outer stent covering film, the outer stent covering film is arranged close to an aorta side semi-open window, and the outer stent covering film is arranged close to the aorta side semi-open window. The grid lantern-shaped support body comprises an atrial side umbrella disc, a ventricular side variable diameter structure and a negative pressure suction cup which is connected with the atrial side umbrella disc and the ventricular side variable diameter structure and used for strengthening anchoring. The valve inner frame comprises a grid barrel-shaped inner frame body and an inner frame covering film, and the inner side of the inner frame body is connected with an artificial valve leaflet. By means of the lantern-shaped design of the outer stent and the valve ring suction cup for assisting anchoring, the problem that an artificial mitral valve replaced through a catheter is difficult to anchor is solved, and the problem that a left ventricular outflow tract is prone to being blocked after a covered stent is implanted is solved through the design that the single side of the dynamically-changeable valve outer stent is not covered with a film.

The invention relates to the technical field of medical image processing, in particular to an aortic valve automatic segmentation method based on a multi-temporal CTA image. The method comprises the following steps: identifying a laminar flow dark area and a vortex bright area on a cross section of an aortic sinus area; according to the first feature size of the laminar flow dark area and the second feature size of the vortex bright area, the valve leaflet-sinus wall spacing is determined; determining a first deviation index according to the change trend of the valve leaflet-sinus wall spacing in the cardiac cycle; determining a second deviation index according to a difference characteristic between the CT value of the laminar flow dark area and the CT value of the eddy current bright area; if the first deviation index and the second deviation index both exceed the corresponding threshold values, judging that the data is in a to-be-corrected time phase; correcting the spacing by using the correction weight calculated by the second deviation index; and extracting key parameters of each time phase on the longitudinal section, and associating the corrected valve leaflet-sinus wall spacing to construct a valve three-dimensional dynamic model, thereby facilitating the three-dimensional dynamic model to output more accurate valve motion data.

The invention discloses application of lobetyolin in preparation of a medicine for treating atherosclerosis, and belongs to the field of biological medicine. The atherosclerosis comprises atherosclerosis induced by a high methionine diet. Through verification, IL-33 in aortic tissues of ApoE <- / -> mice with high methionine diet is remarkably increased, and the expression level of IL-33 in the aortic tissues of the mice is remarkably reduced compared with that of a model group after the mice are treated by lobetyolin. It is proved that lobetyolin has a positive regulation effect on treatment of atherosclerosis. Through molecular docking analysis, the binding energy between the lobetyolin and the IL-33 is-7.3 kcal / mol, which indicates that the IL-33 and the lobetyolin have good binding stability. The invention provides a new idea for clinical treatment of atherosclerosis.

The covered stent comprises a plurality of stent rings distributed in the axial direction and a covering film, and the covering film comprises a first part and a second part; the stent ring comprises a constraint state and a release state, in the constraint state, the stent ring comprises a constraint release line, the constraint release line stitches the two ends, close to the first part, of the second part, so that a compression space is defined by the first part, and the stent ring is compressed and contained in the compression space in the radial direction; and in the release state, the stent ring compressed in the compression space is expanded and is attached to the second part. Interference between the windowing position and the metal stent can be avoided, and interference between the branch artery covered stent system and the metal stent of the covered stent in the aorta in the placing process is avoided; enough supporting force can be provided in the arch area, and the covered stent in the branch blood vessel is prevented from moving towards the inside of the aortic lumen while the aortic lumen is kept unobstructed.

A method of performing a neurovascular procedure includes providing an assembly including a guidewire having a guidewire hub, an access catheter having an access catheter hub, and a guide catheter having a guide catheter hub. The method includes coupling the guidewire hub to a first hub adapter, coupling the access catheter hub to a second hub adapter, and coupling the guide catheter hub to a third hub adapter. Each of the first hub adapter, the second hub adapter and the third hub adapter is movably carried by a support table. The method includes driving the assembly in response to movement of each of the first hub adapter, the second hub adapter and the third hub adapter along the support table until the assembly is positioned to achieve supra-aortic vessel access.

The invention discloses an ultrasonic imaging system and method based on a heart surface, a medium and a product, the system comprises an ultrasonic detection assembly and an imaging terminal which are in communication connection, an ultrasonic transducer is packaged at the head end of an attached ultrasonic probe in the ultrasonic detection assembly, and an acoustic window on the ultrasonic transducer is planar; the ultrasonic transducer is used for being attached to the surface of the heart or the aorta, and the plane of the ultrasonic transducer is parallel to the plane of the acoustic window; and the imaging terminal is used for generating a sound velocity mask pattern according to the reference ultrasonic image, determining echo time delay data according to the sound velocity mask pattern, synthesizing and reconstructing the radio frequency signal data according to the echo time delay data to obtain an ultrasonic image, performing motion compensation on the image sequence, performing multi-modal fusion on the ultrasonic image subjected to motion compensation, and obtaining a final ultrasonic image. The problem of acoustic interference of anatomical structures such as the chest wall and the esophagus in a traditional echocardiography technology is solved, and real-time and high-quality image support is provided for cardiac surgery.

The utility model provides an anchoring device and a transcatheter artificial aortic valve system. The anchoring device is of an integrated structure and comprises an anchoring valve ring support at the telecentric end and an anchoring foot at the proximal end. The anchoring valve ring support is of a cylindrical net-shaped structure. The number of the anchoring feet is three, the anchoring feet are distributed on the periphery of the proximal end of the anchoring valve ring support, the anchoring feet have an abduction angle relative to the axis of the anchoring valve ring support, and each anchoring foot is of a C-shaped hollow structure. According to the anchoring device and the transcatheter artificial aortic valve system, after the anchoring device is released through a catheter, the anchoring foot is embedded into the aortic sinus bottom corresponding to the aorta root, the native valve is extruded between the anchoring foot and the artificial aortic valve, and a first anchoring state is formed; after the artificial aortic valve is expanded, the artificial aortic valve is tightly attached to the anchoring valve ring support and the aortic valve ring to form a second anchoring state; double anchoring provides a stable and reliable supporting effect for the artificial aortic valve.

A branched graft method includes securing a first end of a branch graft into a first conduit and subsequently moving the second end into a second conduit. The first conduit may be a branch vessel, such as a renal artery and the second conduit may be a main graft that extends over an aortic aneurysm. The branch graft may be deployed starting at an offset distance from the first end, thereby preventing the deployed portion from insertion into the first conduit and predetermining the insertion length into the target vessel. The first end may then be deployed to secure the first end to the first conduit. A branch graft may be a self-expanding stent graft having one or more ripcords, and / or a serpentine ripcord that enables non-linear deployment of the branch graft, or deployment that does not progress from one end to the opposing end.

The invention belongs to the technical field of noninvasive hemodynamic monitoring, and provides a dynamic noninvasive cardiac output monitoring system and method. High-quality dynamic pulse wave waveform signals are collected based on a sensor array, motion artifacts in the motion state are corrected, the motion artifacts meet input conditions of a cardiac output calculation model, and dynamic pulse wave feature vectors are calculated; calculating an aorta cross-sectional area estimated value as a correction variable based on the personalized characteristic parameters; and based on a cardiac output model of deep learning training, cardiac output is calculated so as to realize real-time monitoring and evaluation of the dynamic cardiac output of the testee. According to the invention, dynamic, real-time and long-term monitoring of cardiac output parameters can be realized, intermittent correction is not needed, and the system is suitable for household rehabilitation of patients with heart diseases.

The subject of the invention is a delivery system for delivering a self-expanding endoluminal prosthesis to the patient's ascending aorta and aortic valve, the system comprising: - an inner tube (33), extending along a longitudinal Y axis of the delivery system (100), from an atraumatic distal tip (27) to a handle (37); - a metal tube (32), slide-fitted on the inner tube (33), and extending from the internal space of the distal tip (27) to a handle (37); - an outer tubular catheter shaft (22) slide-fitted on the metal tube (32), the catheter shaft (22) is brought out from the handle (37) and is terminated by a capsule (20), containing inside the radially compressed on the metal tube (32), self-expanding endoluminal prosthesis (1) having defined construction and covered at least partially by a coating (16), - the capsule (20) has closed position when is closed by the tip (27) and has open position when the capsule (20) and the tip (27) are displaced relative to each other; wherein the distal part of the metal tube (32) is equipped with receiving means (41, 42) on which the distal locking means (7) of prosthesis (1) are removably embedded and blocked in the inner space of the tip (27) and the delivery system (100) comprises also removable holding means (45, 45') retaining the proximal locking means (9) of the prosthesis (1), so that when the capsule (20) is in its fully open position, the prosthesis (1) is still maintained partially compressed, holding its crimping length.

The invention relates to the technical field of medical equipment, in particular to an intra-aorta balloon anti-bite pump control method, system and device, computer equipment and a storage medium. The method comprises the steps that in response to starting of target equipment, feature collection signals of a target object are obtained, and the feature collection signals comprise electrocardiosignals and blood pressure signals; determining a pressure control signal of the target equipment based on the blood pressure signal, wherein the pressure control signal comprises a peak blood pressure value when the target equipment is inflated and a minimum blood pressure value when the target equipment is deflated; determining a control time sequence signal of the target equipment based on the electrocardiosignal; and driving a pneumatic system of the target equipment based on the pressure control signal and the control time sequence signal so as to realize work control of the target equipment. By adopting the method, the control response efficiency and accuracy can be improved.

The retractor for thoracoabdominal aorta replacement comprises a clamping assembly connected with an operating bed, the upper half portion of the clamping assembly is connected with a first connecting rod through a first locking assembly, the other end of the connecting rod is connected with two symmetrically-arranged universal balls through a second locking assembly, the universal balls are connected with a second connecting rod, and the second connecting rod is connected with a second connecting rod. A plurality of first traction assemblies and a plurality of second traction assemblies are installed on the second connecting rod through third locking assemblies. The device can be installed at any position of an operating bed, the second connecting rod can rotate by 360 degrees through the universal ball, the device adapts to patients with different fatnesses, the mounting angle and the mounting position can be adjusted through various locking assemblies, the device further adapts to patients with different body types, the whole structure can be detached into single structures to be disinfected and maintained, and the device is very convenient to use.

The invention belongs to the technical field of medical instruments, and relates to a delivery system and method for an artificial valve, the system comprises a guide wire used for building a delivery passage for the artificial valve to be delivered, and the end part of the guide wire is provided with a guide wire head; the ultrasonic probe is arranged on the guide wire head and is used for transmitting an ultrasonic signal to the aorta and receiving an ultrasonic echo signal; the processing module is used for receiving and responding to the ultrasonic echo signal, determining an aortic valve opening area according to the ultrasonic echo signal, and outputting a first control instruction according to the aortic valve opening area and the pre-acquired current position of the guide wire head; the mechanical device receives and responds to the first control instruction while bearing the guide wire, and drives the guide wire head to move to the aortic valve opening area. According to the invention, the valve passing operation difficulty is reduced, the operation time is shortened, other operation risks possibly caused by too long operation time are avoided, and the safety is higher.

An endovascular branch coupler stent graft includes a tubular stent assembly defining a central opening and four branch channels disposed in the central opening and attached to the tubular stent assembly. The four branch channel extends along the length of tubular stent assembly. Each branch channel is configured to receive a covered stent for catheterizing a branch vessel. Similarly, the central opening configured to receive a primary stent graft for reinforcing weakened sections of a subject's aorta.

The application discloses a multi-delivery-site asymmetric positioning cross-valve catheter, and particularly relates to the technical field of cross-valve catheters, which comprises an expansion piece, a guide sheath and movable pieces. The expansion piece is provided with through grooves penetrating through the peripheral wall, and the number of the through grooves is at least one; accordingly, the through grooves divide the expansion piece into at least two sub-pieces; one end of each of the sub-pieces is connected through a closed ring-shaped part, and the other end of each of the sub-pieces is fixed with a single movable piece; the number of the movable pieces is matched with the number of the sub-pieces; each of the sub-pieces is provided with an expansion part, and the expansion part comprises at least four mechanical sub-pieces; the head of the guide sheath is arranged in the hollow interior of the closed ring-shaped part, and the middle part of the guide sheath is provided with a hole through which a cross-valve guide wire passes. The cross-valve catheter pushes the tail pipe of the sub-piece, so that the mechanical sub-pieces have different expansion sizes, the outer sides of the mechanical sub-pieces are attached to the ascending aorta, the coaxiality of the distal end opening of the catheter and the expected cross-valve point is improved, and the catheter is stabilized.

The present invention relates to a medical device, which comprises: an infusion catheter; a blocking mechanism, comprising a balloon and a catheter body; the balloon is arranged on the outer surface of the infusion catheter; the catheter body is connected to the balloon, and is used to infuse a filling agent into the balloon; and a supporting mechanism, comprising a supporting body and a driving body, the supporting body is arranged on the outer surface of the infusion catheter and is located at the proximal end of the balloon; the driving body is connected to the supporting body, and is used to drive the supporting body to expand outward or contract inward along its radial direction. When the medical device is used for surgical treatment of aortic dissection, it can provide a clean surgical field, facilitate the doctor's operation, and significantly reduce the circulatory arrest time and reduce the damage to the important organs of the patient's lower body.

The application provides an auxiliary identification method and system for aortic dissection, and the method comprises the following steps: acquiring chest cavity plain scan images of a user's aorta through a CT device, and identifying cross-sectional contour images of the aorta in each chest cavity plain scan image through an image edge recognition algorithm; identifying edge structure information of each cross-sectional contour image, and extracting image features of each cross-sectional contour image; identifying each abnormal image area and abnormal information thereof in each cross-sectional contour image, identifying the abnormal type and abnormal degree of each cross-sectional contour image based on the abnormal information of each abnormal image area, and obtaining auxiliary identification information of aortic dissection of the user through an aortic dissection analysis strategy, aortic dissection probability prediction and prediction reasons. The scheme can improve the auxiliary identification efficiency of aortic dissection in emergency.

Systems and apparatus are provided for using a non-invasively monitored uncalibrated pressure signal from a patient to compute cardiac output and other cardio-vascular parameters, thereby providing safe, effective, reliable and low cost monitoring of patient health. Wearable devices are disclosed that include a sensor array for obtaining patient data that is used to provide an estimate of aortic systolic blood pressure, cardiac output, and end-systolic elastance that may be determined without the need for a cuff.

The invention discloses an aorta covered stent and an aorta stent system, and belongs to the technical field of medical instruments.The aorta covered stent comprises a tubular covered film, end outer wave-shaped stents are arranged on the outer walls of the two ends of the tubular covered film, and an end inner wave-shaped stent is arranged on the inner wall of at least one end; the wave troughs of the end inner wave-shaped stent are fixedly connected with the end of the tubular covering film, the wave crests and the wave crests of the end outer wave-shaped stent are arranged in a staggered mode, and the connecting beams connecting the wave crests and the wave troughs are slidably connected to the end of the tubular covering film at intervals. The aorta stent system comprises a stent conveying system and an aorta covered stent. The stent conveying system comprises a conveying catheter and a stent conveyor. After the end part of the aorta covered stent is compressed, the wave crest of the wave-shaped stent in the end part can extend out of the port of the tubular covered stent to be hooked and loaded with a stent conveying system; after the aorta covered stent is released, the wave crests of the corrugated stent in the end part can be shrunk into the tubular covered stent, so that stimulation to aorta blood vessels is avoided.

Disclosed herein are related to a system, a method, and a non-transitory computer readable medium for simulating, predicting, or estimating, based on machine learning neural networks, wall stress of a body part. In one approach, a first neural network automatically detects features in multiple images of a body part. For example, the first neural network may detect, for each image, a lumen and a wall of an aorta. According to the detected features, a second neural network may simulate, estimate, or predict wall stress of the body part in response to pressure applied to the body part. For example, a model generator can generate a three-dimensional model of the body part according to the detected features in the multiple images, and the second neural network can simulate, estimate, or predict wall stress of the body part according to the three-dimensional model.

The present invention provides an in-situ window rupture system for an aortic stent graft, comprising a guidewire, a balloon catheter and a quickly detachable handle; the guidewire comprises a core wire, a spring wire and a stopper; the stopper is arranged on the proximal side of the spring wire and the proximal end is fixed to the core wire or connected to the middle section of the spring wire; the balloon catheter is sleeved on the outside of the core wire; the distal end face of the balloon catheter is blocked on the proximal side of the middle diameter expansion section of the stopper; the quickly detachable handle comprises a handle assembly 1, a handle assembly 2 and a locking assembly; the first main handle and the second main handle are axially relatively slidable, so that the distal end face of the balloon catheter can abut against or be away from the middle diameter expansion section of the stopper. The present invention can improve the positioning accuracy of the guidewire at the window rupture point of the stent graft and quickly rupture the membrane, and can also synchronously expand the puncture hole, and at the same time, can realize the alternate insertion of multiple instruments by a single guidewire insertion, so as to simplify the surgical steps, improve the surgical efficiency, and reduce the damage to the patient during the surgical process.

The invention belongs to the field of medical surgical instruments, and discloses an aortic arch covered stent which comprises a main covered stent body and a main covering film arranged on the stent body. The first puncture part and the second puncture part on the aortic arch section comprise an ascending aorta section, an aortic arch section and a descending aorta section which are connected in sequence, and the aortic arch section is longer than the ascending aorta section and the descending aorta section; the branch covered stent comprises a branch stent body and a branch covering film arranged on the branch stent body, and the branch covered stent is communicated with the aortic arch section; a first puncture part and a second puncture part are arranged on the aortic arch section and located on the two sides of the branch covered stent, and the positions where the first puncture part and the second puncture part are located are only composed of the main covered film. The invention further provides an aortic arch covered stent assembly. The aortic arch covered stent and the aortic arch covered stent assembly are simple in structure and convenient to use.

The percutaneous intervention type axial flow blood pump comprises an impeller assembly, a flexible shaft transmission assembly and a handle assembly, the impeller assembly and the handle assembly are connected through the flexible shaft transmission assembly, the flexible shaft transmission assembly comprises a flexible shaft, a transition sleeve and a protective sleeve, the transition sleeve is connected with a flow guide tail cone of the impeller assembly, and the protective sleeve is connected with the impeller assembly. One end of the protective sleeve is fixed to the inner wall of the transition sleeve, the other end of the protective sleeve is connected with the handle assembly, the handle assembly is provided with an in-vitro micro motor in transmission connection with one end of the flexible shaft, and the other end of the flexible shaft is connected with an impeller rotor of the impeller assembly. The impeller assembly and part of the flexible shaft transmission assembly of the axial flow blood pump are percutaneously implanted into the body of a patient, the handle assembly is located outside the body, and the impeller assembly is kept fixed in the descending aorta through an elastic support of the impeller assembly. The axial flow blood pump adopts an in-vitro micro motor and flexible shaft transmission mode, and the problems that the temperature rise of an axial flow blood pump with a built-in motor is too high, abrasion particles are separated out, and fault inspection is not convenient are solved.

The invention provides a guide-wire-free integrated balloon catheter system which comprises a balloon dilatation mechanism, a balloon catheter body and a balloon catheter body, the balloon dilatation mechanism comprises a first balloon, a second balloon and a balloon pushing rod, and the first balloon and the balloon pushing rod are arranged in a penetrating mode; the first balloon is used for blocking an aorta I region; the second balloon and the balloon pushing rod are arranged in a penetrating manner; and the second balloon is used for blocking an aorta III region. According to the technical scheme, the hemostasis and plugging effects are improved.

The present disclosure provides a method and an apparatus for assessing a physiological signal quality based on an IABP device, and relates to the technical field of medical instruments. The method includes: acquiring, in the operation process of an IABP device, physiological signal of a patient treated by the IABP device, where the physiological signal include an electrocardiographic signal and / or an arterial blood pressure signal; extracting signal parameter values of the physiological signal, where the signal parameter values include: a first kurtosis, a skewness, an effective signal ratio, a second kurtosis, and a dominant frequency; performing signal quality assessment on the physiological signal based on the signal parameter values; and implementing, based on the physiological signal, intra-aortic balloon counterpulsation in response to a signal quality assessment result represents that the signal quality of the physiological signal satisfies a preset signal quality requirement.