29 results about "Left atrial" patented technology

A blood flow pathway is formed between a left atrium and a coronary sinus for relieving elevated left atrial pressure. The treatment method includes providing first and second delivery catheters, wherein a medical device is carried by the second delivery catheter. A side outlet opening of the first delivery catheter is positioned within the coronary sinus and oriented toward a left atrium. An anchor on the first delivery catheter contacts an inner surface of the coronary sinus for stabilization. A distal portion of the second delivery catheter is advanced through the side outlet opening. A puncture component is then passed through a target wall portion for creating the blood flow pathway. The medical device is positioned in the opening.

A blood flow pathway is formed between a left atrium and a coronary sinus for relieving elevated left atrial pressure. The treatment method includes providing first and second delivery catheters, wherein a medical device is carried by the second delivery catheter. A side outlet opening of the first delivery catheter is positioned within the coronary sinus and oriented toward a left atrium. An anchor on the first delivery catheter contacts an inner surface of the coronary sinus for stabilization. A distal portion of the second delivery catheter is advanced through the side outlet opening. A puncture component is then passed through a target wall portion for creating the blood flow pathway. The medical device is positioned in the opening.

The utility model discloses a left atrial appendage occluder conveying sheathing canal shaping device which comprises heating plates which are oppositely arranged, a bent section shaping block and a straight section shaping block which are sequentially arranged between the plate faces of the heating plates in the shaping direction of a conveying sheathing canal, and shaping grooves are correspondingly formed in the bent section shaping block and the straight section shaping block. A shaping area of the conveying sheath tube is positioned through the shaping groove, an angle shaping block for shaping and fixing the torsion angle of the end of the conveying sheath tube relative to the straight section is arranged on the straight section shaping block, and the angle shaping block and the straight section shaping block are connected in a rotating fit mode and are rotationally positioned through an arranged angle limiting mechanism. According to the utility model, through the modular design, the shaping part for conveying the sheathing canal is separately and independently designed, a user can flexibly adjust the angle according to the requirements of different patients, and the complex operation of needing various sheathing canals is avoided, so that the left auricle anatomical structure of different patients can be adapted, and the requirements on various sheathing canals are reduced.

A blood flow pathway is formed between a left atrium and a coronary sinus for relieving elevated left atrial pressure. The treatment method includes providing first and second delivery catheters, wherein a medical device is carried by the second delivery catheter. A side outlet opening of the first delivery catheter is positioned within the coronary sinus and oriented toward a left atrium. An anchor on the first delivery catheter contacts an inner surface of the coronary sinus for stabilization. A distal portion of the second delivery catheter is advanced through the side outlet opening. A puncture component is then passed through a target wall portion for creating the blood flow pathway. The medical device is positioned in the opening.

The invention relates to the technical field of medical treatment, and discloses a construction method of a left auricle hemodynamics simulation system, which comprises the following core steps of: firstly, acquiring noninvasive transthoracic echocardiography and cardiac enhancement CT (Computed Tomography) image data of a patient; secondly, through an image fusion technology, an accurate left auricle three-dimensional geometric structure model is constructed; and finally, on the basis of the model, carrying out hemodynamic simulation on the left atrium and the left auricle by utilizing a CFD (Computational Fluid Dynamics) technology, and accurately calculating hemodynamic parameters such as the blood flow velocity at the opening of the left auricle. The method has the advantages that the blood flow state of the left atrial appendage is evaluated completely, noninvasively, accurately and quantitatively, and traditional invasive transesophageal ultrasonic examination can be effectively replaced. According to the method, the comfort level of the patient and the examination safety are remarkably improved, operation related risks are avoided, meanwhile, the screening feasibility and efficiency are improved, and the method has important value for clinical management of the stroke risk of the atrial fibrillation patient.

The invention discloses a left atrial appendage closer, and belongs to the field of medical instruments. The left auricle closer comprises a conveying catheter, a supporting pipe, a supporting disc, a telescopic supporting rod, a closing clamp assembly and a control pull wire, a closing clamp can be fed into an opening of a left auricle through the conveying catheter, and the opening of the left auricle is opened through cooperation of the telescopic supporting rod and the control pull wire; according to the left atrial appendage closure device, the puncture hook needle in the closure clamp is used for puncturing the tissue wall of the left atrial appendage opening to achieve combination, finally the left atrial appendage opening is closed through linear closing of the closure clamp, and compared with an existing left atrial appendage closure device, the puncture hook needle on the periphery of the closure clamp can puncture the tissue in the radial direction, the closure clamp is used for driving the left atrial appendage opening to be closed, and the left atrial appendage opening is closed. The left atrial appendage closing clamp has the advantages that the left atrial appendage closing clamp is more firmly connected with the left atrial appendage and is not easy to fall off, the problem that the sealing reliability of the left atrial appendage is reduced due to looseness or movement is solved, long-term effectiveness of left atrial appendage closing is guaranteed, and complications caused by falling off and unreliable sealing are reduced.

The application provides a guide system for patent foramen ovale (PFO) interventional closure device guide wire, which comprises a sheath tube dilator assembly, a guide tube component, a first guide wire and a second guide wire; the sheath tube dilator assembly comprises a fixed sheath tube component and a dilator component, the tube structure of the dilator component is arranged in the tube structure of the fixed sheath tube component; the sheath tube dilator assembly has an operation part for controlling the movement of the distal end of the sheath tube dilator assembly to the fossa ovalis of the atrial septum; the tube structure of the guide tube component is rotatably and slidably arranged in the tube structure of the dilator component, and the distal end of the guide tube component is used for entering the PFO tunnel from the fossa ovalis of the atrial septum, thereby establishing a left atrial passage. The application can significantly improve the success rate and efficiency of the operation, and effectively solves the guide wire passing difficulty problem caused by the small size, adhesion or anatomical variation of the PFO tunnel by using the step-by-step strategy of first mechanically expanding the PFO tunnel by using the guide tube component and then exploring the path by using the second guide wire.

The application provides a method for fixing an interventional valve on a mitral valve, which comprises the following steps: driving a plurality of fixing nails into the left atrial side wall above the mitral valve; and connecting a fixing disc on the atrial septum through a connecting line to form a plurality of fixing lines above the mitral valve. The fixing method can form a plurality of fixing lines above the mitral valve, and the fixing lines can provide stable fixing support for the interventional valve implanted below, thereby effectively solving the problem that the current interventional mitral valve is difficult to be stably anchored, and the method for fixing the interventional valve on the mitral valve is simple and convenient to operate.

An ultrasound imaging system may receive ultrasound data of a heart, wherein the ultrasound data was acquired across at least a portion of a cardiac cycle of the heart. The ultrasound imaging system may generate strain measurements based, at least in part on the ultrasound data. The ultrasound imaging system may analyze, using a cardiotoxicity detection algorithm, at least the strain measurements to determine a cardiotoxicity level of the heart. In some examples, the cardiotoxicity detection algorithm comprises a support vector machine (SVM) model trained on one or more of left ventricular (LV) strain data, left atrial (LA) strain data, right ventricular (RV) strain data, or right atrial (RA) strain data. In some cases, the cardiotoxicity detection algorithm uses one or more global left ventricular (LV) strain curves as an input to determine the cardiotoxicity level of the heart.

The invention provides a left atrial appendage image measurement method and system, electronic equipment and a storage medium, and relates to the technical field of left atrial appendage image measurement. The image measurement method comprises the following steps: transforming three-dimensional heart image data according to a spatial position transformation relationship to determine transformed three-dimensional heart image data; transforming the transformed three-dimensional heart image data according to the left auricle motion change function to determine four-dimensional heart image data; and analyzing the four-dimensional heart image data based on a preset AI algorithm to determine a target dynamic parameter of the left auricle in the heartbeat cycle. Based on the spatial position transformation relation and the left auricle motion change function, the dynamic parameter change curve of the left auricle in the whole heartbeat cycle (including the systolic period and the diastolic period) is introduced, and dynamic change information of the left auricle form in the heartbeat cycle is provided, so that the image measurement of the left auricle is more reliable and stable, and the measurement accuracy is improved. And the measurement accuracy is improved.

The present teaching provides devices and methods for treating heart disease by normalizing elevated blood pressure in the left and right atria of a heart. Various embodiments of the devices allow left-to-right blood flow through their flow elements. The flow element of the device is designed to self-adjust the amount of blood flow in response to the left atrial pressure fluctuation.

The invention belongs to the technical field of medical data analysis, and particularly relates to a new atrial fibrillation risk prediction method and system for an ICD implantation patient, and the method comprises the steps: data acquisition: collecting clinical characteristic parameters of the ICD implantation patient, including gender, left atrium inner diameter, diabetes mellitus indexes and pulmonary artery systolic pressure; data preprocessing: carrying out binarization and standardization processing and classification variable coding; model construction: based on a multi-factor statistical analysis model, establishing a mathematical association equation of the clinical characteristic parameters and the new atrial fibrillation risk; risk calculation: calculating the risk probability of new onset atrial fibrillation of the individual according to the equation, and outputting a 0-1 risk value; and outputting a result, and generating a visual risk assessment result. According to the method, a multi-factor model is constructed to predict the risk of new atrial fibrillation after ICD implantation of sudden cardiac death high-risk population, AUC = 0.793 (95% CI is 0.705-0.855), and the method is a special prediction tool for ICD implantation population.

The utility model discloses a plug type left auricle of heart stopper, including the plug body of net, one end of plug body is equipped with the first connecting piece for connecting positioning structure, the other end of plug body is equipped with the second connecting piece for connecting conveying instrument, be equipped with the stoppage film on plug body, the outer periphery of plug body is equipped with the anchoring structure. The plug type left auricle of heart stopper can cooperate with the positioning plug with the positioning plug as the support adjustment release position and angle, to obtain better stoppage effect, avoid turning over, improve the success rate of operation, simple operation, safe and reliable.

The utility model discloses a device for automatically executing a foaming test. In the application, the device is firstly switched to a left atrial radiography working mode, the device is switched to a first pipeline state, a second valve is communicated with a first container and a first injector, the second valve closes a pipeline between the first injector and a second injector, the first injector extracts radiography mixed liquid from the first container, and the first container is communicated with the second injector; then the device is switched to a second pipeline state, a second valve and a third valve are communicated with the first injector and the second injector, the second valve closes the pipeline between the first injector and the first container, the third valve closes the pipeline between the second injector and the second end, and at the moment, the first injector and the second injector push and inject radiography mixed liquid in a reciprocating mode; the contrast mixed liquid forms bubble liquid in the state of the second pipeline, so that the preparation of the left atrium contrast bubble liquid is automatically completed, and the preparation efficiency and the consistency of the prepared bubble liquid are improved.

The application discloses a left auricle plugging device distal end necking auxiliary device and a necking method, which comprises a base, a guide lining core, a guide sleeve, a first necking sleeve, a second necking sleeve and a mounting sleeve, an inner ring for supporting the inner periphery of a support rod of the left auricle plugging device is arranged on the first necking sleeve, a positioning ring for positioning the support rod is arranged on the second necking sleeve, and an outer ring for fixing the outer periphery of the support rod is arranged on the mounting sleeve; the inner ring, the positioning ring and the outer ring are in the same radial direction, and a positioning groove corresponding to the support rod is arranged on the positioning ring; the first necking sleeve, the second necking sleeve and the mounting sleeve are cooperated, the inner ring, the positioning ring and the outer ring are fixed, the necking device is not limited by the structure of the left auricle plugging device, has universality, and the assembly mode that pipelines are directly sleeved can simplify operation steps and improve necking efficiency.

The invention discloses a left atrium sensing implantation device based on piezoelectric ceramic ultrasonic energy supply and a sensing system. The left atrium sensing implantation device comprises a shell, piezoelectric ceramic, a sensor and a transceiving circuit. The piezoelectric ceramic adopts a partition electrode design, a concentric annular region of the piezoelectric ceramic is used for receiving in-vitro ultrasonic energy and converting the in-vitro ultrasonic energy into electric energy, and a fan-shaped region of the piezoelectric ceramic is used for modulating sensing data in a load keying (LSK) mode and backscattering the sensing data. The sensor is integrated based on a CMOS-MEMS process and synchronously collects pressure and temperature signals in the left atrium. The system further comprises an in-vitro ultrasonic probe and a host, and wireless energy supply, data return and information display are achieved. Complete wireless passive work and minimally invasive implantation of the implantation device are achieved, high-precision and continuous real-time monitoring of pressure and temperature of the left atrium is supported, and the device is suitable for long-term physiological parameter management of heart failure patients.

The invention provides a key target potential identification method in atrial fibrillation catheter radiofrequency ablation, which comprises the following steps of: in an atrial fibrillation state, reconstructing anatomical shells of a left atrium (LA) and a right atrium (RA) through a system, performing two-stage electrogram acquisition by adopting a catheter, and marking a KSPs region on a three-dimensional anatomical model; performing point-by-point ablation on the marked KSPs area; after the key superimposed potential (KSPs) is ablated, the globally disordered atrial electrical activity tends to be ordered; if atrial fibrillation is converted into regular atrial velocity (AT), the AT is regarded as an atrial fibrillation driving focus, and excitation mapping and ablation need to be further carried out until sinus rhythm is recovered; after the sinus rhythm is recovered, burst pacing stimulation is carried out again through the coronary sinus catheter, and the non-inductivity of the atrial fibrillation is verified; and if the atrial fibrillation still can be induced, repeating the steps a, b and c, and searching and ablating the residual KSPs until the atrial fibrillation cannot be induced. The KSP identification and ablation method provided by the invention is remarkably improved in the aspects of mechanism understanding, mapping means, ablation strategies and clinical outcome.

The engagement of the two atria via atrial pacing therapy is determined using one or more metrics based on monitored external electrical activity. For example, external electrical activity can be monitored during delivery of the atrial pacing therapy, right atrial and left atrial components can be generated based on the monitored external electrical activity, and one or more metrics can be generated based on the right atrial and left atrial components. One or more metrics can then be used to determine whether the atrial pacing therapy has biatrial engagement.

A method for forming a shunt between the right and left atria of a mammalian heart, the method comprising puncturing an atrial septum between the right and left atria to form the shunt. An ablation device having a balloon is at least partially advanced through the shunt. The balloon is inflated and configured to thermally insulate the atrial septum from the blood within the left and right atria. Ablation energy is delivered to ablate the atrial septum.

A system for implanting two or more implants into a heart of a patient may include a multi-device steerable guide catheter ("MDSGC"), a transcatheter edge-to-edge repair ("TEER") implant delivery device, and an additional implant delivery device for implanting an additional medical device. The additional medical device may be a collapsible and expandable prosthetic transcatheter aortic valve repair ("TAVR") device or a collapsible and expandable left atrial appendage ("LAA") occluder device. The MDSGC may have a first handle and may be steerable, the TEER delivery device may have a second handle, and the additional delivery device may have an additional handle. The system may include a fixation device to capture native heart valve leaflets therebetween as part of a TEER procedure. The TEER delivery device and the additional delivery device may each have a catheter sized and shaped to pass through an interior of a catheter of the MDSGC.

The invention provides a guide system for a guide wire of a patent foramen ovale interventional occluder. The guide system comprises a sheath tube dilator assembly, a guide tube component, a first guide wire and a second guide wire, the sheath tube expander assembly comprises a sheath tube fixing component and an expander component, and a tube body structure of the expander component is used for being arranged in a tube body structure of the sheath tube fixing component in a penetrating mode. The sheathing canal dilator assembly is provided with an operation part which is used for controlling the far end of the sheathing canal dilator assembly to move to the atrial septum fossa ovalis; the pipe body structure of the guide pipe component is used for being rotatably and slidably arranged in the pipe body structure of the expander component in a penetrating mode, and the far end of the guide pipe component is used for entering the PFO tunnel from the atrial septum fossa ovalis, so that a left atrial channel is established. According to the method, the operation success rate and efficiency can be remarkably improved, and the problem that a guide wire is difficult to pass through due to the fact that the PFO tunnel is small, adhesion or anatomical variation is effectively solved by means of the step-by-step strategy that the PFO tunnel is mechanically opened through the guide pipe component firstly and then the second guide wire explores a path.

The application discloses a foaming test device and system. In the foaming test device, left / right atrial contrast test can be considered simultaneously. When the foaming test device is switched to a left atrial contrast working mode, physiological saline and a contrast agent are automatically mixed to form a left atrial contrast mixed liquid, and a left atrial contrast foaming liquid is further formed. When the foaming test device is switched to a right atrial contrast working mode, physiological saline, air and blood are automatically mixed to form a right atrial contrast mixed liquid, and a right atrial contrast foaming liquid is further formed. Through reciprocating injection of the first injector and the second injector, the efficiency of foaming of the left / right atrial contrast mixed liquid can be effectively improved, the time for forming the foaming liquid is shortened, automatic preparation of the left / right atrial contrast foaming liquid is rapidly realized, the quality, preparation efficiency and consistency of the foaming liquid are improved, and the accuracy of auxiliary screening is improved.

The present invention relates to the field of medical device technology, and more particularly to a left atrial pigtail catheter for ECMO with a head-end protection function. The catheter comprises a catheter, a dilator inserted within the catheter, a guidewire inserted within the dilator, a flow guide portion at the proximal end of the catheter, and a support portion embedded in the catheter sidewall. The present invention can effectively prevent complications such as left ventricular bulge and pulmonary edema, and reduce the risk of accidents such as atrial perforation.

The invention belongs to the field of medical image processing and computer-aided diagnosis, and discloses an evaluation method and system for simulating atrophy degradation after complete closure of a left atrial appendage, and the method comprises the steps: obtaining three-dimensional image data of the left atrial appendage before and after closure and at a plurality of postoperative follow-up time points; constructing a three-dimensional model of the left auricle based on the three-dimensional image data; based on the three-dimensional model, extracting spatio-temporal characteristics representing atrophy and degradation of the left auricle; fusing the spatio-temporal features and the anatomical pathology indexes, and learning the fused time sequence features through a machine learning model to simulate the degradation trajectory of the left auricle; and based on the degradation track and a preset dynamic evaluation model, generating quantitative score and early warning information for evaluating the atrophy state after the left auricle is closed. The problems that in the prior art, the evolution process after left atrial appendage closure cannot be dynamically tracked and quantitatively evaluated, evaluation standards are not uniform, and the evaluation standards are disjointed with a pathological mechanism are solved.

The application discloses a left auricle plugging device, which comprises a sealing part and an anchoring part comprising a plurality of supporting rods, the sealing part and the anchoring part are respectively provided with connecting parts, and the connecting parts of the sealing part and the anchoring part are connected with each other. The left auricle plugging device improves the connecting mode of the sealing part and the anchoring part, shortens the overall distance between the sealing part and the anchoring part, avoids and delays the axial lengthening of the left auricle plugging device as a whole, and further guarantees that the sealing part is attached to and plugs the left auricle port.

The application discloses a left auricle plugging device closing device and closing method, belongs to the technical field of left auricle plugging device, and is used for closing and positioning the proximal end of the left auricle plugging device. The closing device comprises a positioning ring used for cooperating with the end of the supporting rod of the left auricle plugging device to be closed, a clamping groove used for being mutually embedded with the proximal end of the supporting rod of the left auricle plugging device is arranged on the positioning ring in the circumferential direction, the second clamping parts of adjacent clamping grooves are mutually staggered along the axis direction of the positioning ring, and a fixing ring used for tightly pressing the proximal end of the supporting rod of the left auricle plugging device in the positioning ring is coaxially arranged on the outer periphery of the positioning ring. The closing device can reduce the circumferential space occupied by the proximal end of the supporting rod when being closed, thereby reducing the diameter of the positioning ring when the left auricle plugging device of the same specification is closed, the purpose of reducing the overall size of the plugging device in the closed state is achieved, the size requirement of the small-diameter conveying pipe can be met, and the application performance of the left auricle plugging device is improved.

Systems and methods for left atrial appendage closure device specification from two dimensional (2D) Intracardiac Echo imaging (ICE). In an imaging procedure, 2D ICE is used to acquire images of the left atrium of a patient. A model of the left atrium is generated from the images of the left atrium. The model of the left atrium is used to validate subsequent imaging of the left atrial appendage of the patient. Anatomical measurements from the validated subsequent imaging may be used to select or specify a left atrial appendage closure device in order to, for example, treat atrial fibrillation patients.

This invention relates to a method and apparatus for processing characteristic dimensions based on cardiac ultrasound video measurements. The method includes: receiving a first video; extracting video frame images; detecting key points in each frame image based on a key point detection model; filtering diastolic and systolic frame images; filtering mid-systolic ventricular frame images; annotating key points and characteristic dimensions of the right ventricular diameter, interventricular septum thickness, left ventricular diameter, and left ventricular posterior wall thickness on the diastolic frame images; annotating key points and characteristic dimensions of the left ventricular diameter on the systolic frame images; annotating key points and characteristic dimensions of the left atrial anteroposterior diameter, aortic valve annulus diameter, aortic sinus diameter, and ascending aortic diameter on the mid-systolic ventricular frame images; and outputting the annotated diastolic, systolic, and mid-systolic ventricular frame images as the processing result. This invention can solve the problem of manual intervention in conventional methods and improve measurement efficiency.