34 results about "Pulmonary vein" patented technology

To provide a system and a method for achieving linear alignment between elements in a procedure.SOLUTION: The system and method include determining the axis of a first element, such as the ostium, of multiple elements utilized in the procedure, determining the axis of a second element, such as a catheter, of the multiple elements utilized in the procedure, and aligning the determined axis of the first element and the determined axis of the second element. The method may further include determining the axis of a third element, such as a sheath of the catheter, of the multiple elements utilized in the procedure, and aligning the determined axis of the third element with the aligned axis of the first element and the aligned axis of the second element.SELECTED DRAWING: Figure 1

A gap between a plurality of ablation sites in a heart that hinders electrical propagation therethrough is found by projecting the locations of the sites in a 3-dimensional coordinate system onto a simulation plane, identifying a set of shortest 3-dimensional paths that correspond to 2-dimensional connections between pairs of the projected locations of the sites, and reporting a gap as a longest one of the set.

The present technology relates to standardized coordinate systems for mapping three-dimensional structures. An exemplary method includes: obtaining imaging data including a representation of a left atrium of a subject; identifying anatomical features represented in the imaging data, the anatomical features including pulmonary veins that connect to the left atrium; generating a 3D surface mesh corresponding to the left atrium; determining a reference point on the 3D surface mesh based on locations of junctions of the pulmonary veins with the left atrium; establishing a reference axis based on the reference point; determining, on the 3D surface mesh and based on the reference axis, lines of longitude; determining, on the 3D surface mesh, lines of latitude along the lines of longitude; assigning coordinate values to points on the 3D surface mesh based on the lines of longitude and latitude; and generating a 2D map of the left atrium using the coordinate values.

A method of cardiac treatment to provide a synergetic therapeutic effect of lowering the hyperactive sympathetic response observed in microvascular disease (MVD) and heart failure (HF) pathologies and promoting cardiac remodeling of left ventricular hypertrophy in a patient. The method may include ablating renal sympathetic nerves of the patient to reduce sympathetic afferent and efferent activity to the kidney, thereby reducing blood pressure, and ablating a greater splanchnic nerve to reduce stressed blood volume with exertion. The method may include ablating renal sympathetic nerves of the patient to reduce sympathetic afferent and efferent activity to the kidney, thereby reducing blood pressure and at least one of: ablating pulmonary artery nerves of the patient to reduce cardiac sympathetic activity; and ablating pulmonary vein nerves of the patient to reduce arrhythmias.

A method of sensing a physiological parameter involves advancing a delivery catheter to a right atrium of a heart of a patient via a transcatheter access path, advancing the delivery catheter through an atrial septal wall into a left atrium of the heart, deploying a distal anchor of a sensor implant device from the delivery catheter, anchoring the distal anchor of the sensor implant device to a first pulmonary vein, withdrawing the delivery catheter from the first pulmonary vein, thereby exposing at least a portion of a sensor module of the sensor implant device in the left atrium, deploying a proximal anchor of the sensor implant device from the delivery system, anchoring the proximal anchor of the sensor implant device to a second pulmonary vein, and withdrawing the delivery catheter from the heart.

The invention provides a cattail pollen content prediction method and system based on a hyperspectral double-flow multi-scale CNN, and belongs to the field of quality detection of traditional Chinese medicinal materials. The method comprises the following steps: acquiring hyperspectral image data of a pollen typhae sample, preprocessing the acquired hyperspectral image data, and extracting region-of-interest spectral data of the pollen typhae sample; inputting the extracted spectral data of the region of interest into a trained double-flow multi-scale residual fusion CNN model, performing multi-scale feature extraction and fusion by using a VNIR multi-scale branch and an NIR multi-scale branch, and outputting multi-scale fusion features; inputting the multi-scale fusion features into an attention fusion module, and outputting final fusion features; and based on the final fusion features, outputting a content prediction value of the active ingredients of the pollen typhae through a content prediction layer. The method solves the problems that a traditional detection method is low in efficiency, samples are damaged, and an existing spectrum model ignores wave band characteristic differences, so that precision is insufficient, and rapid, lossless and high-precision prediction of the pollen typhae content is achieved.

An apparatus includes a shaft, the shaft including a plurality of stepped sections along the length of the shaft. The apparatus further includes a plurality of electrodes disposed along the length of the shaft, each electrode characterized by a geometric aspect ratio of the length of the electrode to the outer diameter of the electrode. Each electrode is located at a different stepped section of the plurality of stepped sections of the shaft and includes a set of leads. Each lead of the set of leads is configured to attain an electrical voltage potential of at least about 1 kV. The geometric aspect ratio of at least one electrode of the plurality of electrodes is in the range between about 3 and about 20.

The present invention is a high resolution, multi-function, conformal electronics device generally having a flexible and stretchable, high-density electrode array, integrated with a catheter (e.g., balloon catheter) for mapping, ablating, pacing and sensing of cardia tissue associated with heart arrhythmias. The active sensing electrode array can acquire diagnostic information including electrical (e.g., electrograms), mechanical (e.g., strain measurements), impedance (e.g., resistance), metabolic (e.g., pH or NADH measurement) from the underlying heart tissue surface with which it is in contact. The electrode array may be designed to be of various sizes and shapes to conform to the targeted cardiac tissue architecture (e.g. atrial, ventricle, right ventricular outflow tract, coronary sinus, pulmonary veins, etc.) corresponding to the specific type of cardiac arrhythmia. The present invention can precisely locate the source of arrhythmia as described above and deliver therapy from the same electrode array. This is achieved using a capacitive sensing electrode array that can not only monitor but also deliver electrical stimulation.

Devices, systems, and methods are provided for treating conditions of the heart, particularly the occurrence of arrhythmias. The devices, systems, and methods deliver therapeutic energy to portions of the heart, such as to the pulmonary vein ostia when treating atrial fibrillation, to provide tissue modification. Generally, the tissue modification systems include a specialized catheter, a high voltage waveform generator, and at least one different energy delivery algorithm. Other embodiments include conventional ablation catheter and system components to support use with the high voltage waveform generator. Example catheter designs include a variety of delivery types, including localized delivery, "single shot" delivery, and various combinations thereof. In some embodiments, energy is delivered in a monopolar fashion. However, it will be appreciated that a variety of other embodiments are also provided.

The application discloses an ex vivo heart perfusion system and a perfusion control method, wherein the perfusion system comprises: an organ bin, which is externally provided with a constant temperature heating film for controlling the temperature in the organ bin to be a first preset temperature threshold; a liquid storage container for containing a perfusion medium, an outlet end of the liquid storage container being connected to a first active branch vein through a first liquid supply pipe and connected to a pulmonary vein through a second liquid supply pipe, an inlet end of the liquid storage container being connected to a second active branch vein through a first liquid return pipe and connected to a pulmonary artery through a second liquid return pipe; a circulating pump connected to the first liquid supply pipe; an oxygenator connected to the first liquid supply pipe, the oxygenator being connected with a gas supply module for adjusting the gas mixing ratio in the perfusion medium; and an injection pump group for supplementing injection of nutrient substances or therapeutic drugs. The application can effectively prolong the heart supply storage time, reduce the heart supply discard rate, and further improve the utilization rate of the heart supply.

The application provides a lung recognition processing method and device and a server, relates to model processing technology, and the method comprises the following steps: obtaining a model recognition instruction, the model recognition instruction comprises a lung model identifier, determining a lung model corresponding to the lung model identifier, and the lung model comprises a lung parenchyma model, a trachea model, a pulmonary vein model and a pulmonary artery model. Based on the growth information of at least one of the trachea model, the pulmonary vein model and the pulmonary artery model, a plurality of initial segmentation cross sections of the lung parenchyma model are determined. According to at least one of the intrasegment trachea, intrasegment vein and intrasegment artery in each initial lung segment, a plurality of target segmentation cross sections of the lung parenchyma model are generated. According to the target segmentation cross sections of the reconstructed lung model, the distribution information of each lung segment can be obtained, thereby helping to improve the accuracy of the surgical plan, reduce the surgical risk index, improve the surgical success rate, and solve the technical problem that it is difficult to recognize the distribution of the intrapulmonary trachea, blood vessels and lung segments.

A device for providing cardiac treatment at the left atrium of a patient's heart. The device includes a retention body and a prosthetic valve. The retention body has a shape that can be manipulated between a collapsed state and a normal or expanded state. First and second openings are defined at one side of the retention body, and a lower opening is defined at an opposite side. The prosthetic valve is carried by the retention body at the lower opening. The retention body is configured to engage a substantial portion of an interior surface of the left atrium, securing the prosthetic valve at a desired location relative to a native mitral valve (e.g., within the mitral valve or slightly spaced from the mitral valve). The first and second openings are sized and shaped so as to permit blood flow from the pulmonary veins into the interior region.

To provide a device, system and method for treating a heart state, in particular the occurrence of arrhythmias.SOLUTION: A device, system, and method deliver therapeutic energy to portions of a heart to provide tissue modification such as to entrances to pulmonary veins in a treatment of atrial fibrillation. In general, a tissue modification system includes a specialized catheter, a high voltage waveform generator, and at least one distinct energy delivery algorithm. Other embodiments include conventional ablation catheters and system components to enable use with a high voltage waveform generator. Example catheter designs include a variety of delivery types including focus delivery, a "one-shot" delivery, and various possible combinations. In some embodiment, the energy is delivered in a monopolar fashion. However, it may be appreciated that a variety of other embodiments are also provided.SELECTED DRAWING: Figure 34

The invention is entitled "Sensing and mapping catheter for guiding and supporting balloon catheters". The invention discloses a catheter configured to guide and support balloon catheters for use in and around the pulmonary veins and their ostia, the catheter having an elongated shaft including a proximal portion having a first flexibility and a distal portion having a second flexibility greater than the first flexibility, and a distal assembly including an elbow portion and a generally circular portion generally transverse to the longitudinal axis, and the generally circular portion including a third flexibility greater than the second flexibility. A single axis position sensor and a sensing ring electrode are carried on the generally circular portion.

The instant disclosure relates to electrophysiology catheters for tissue ablation. In particular, the instant disclosure relates to a cryogenic ablation balloon with a catheter handle that interfaces with capital equipment.

A gap between a plurality of ablation sites in a heart that hinders electrical propagation therethrough is found by projecting the locations of the sites in a 3-dimensional coordinate system onto a simulation plane, identifying a set of shortest 3-dimensional paths that correspond to 2-dimensional connections between pairs of the projected locations of the sites, and reporting a gap as a longest one of the set.

The application discloses a method and device for evaluating the risk of stroke related to atrial fibrillation and a storage medium, relates to the technical field of risk evaluation, and comprises the following steps: acquiring a cardiac image of a patient; acquiring a left atrial model according to the cardiac image, wherein the left atrial model comprises a left atrial body, a mitral annulus, a pulmonary vein atrium and a left atrial appendage; calculating blood flow parameters of the left atrium according to the left atrial model, wherein the blood flow parameters comprise at least one of particle residence time and blood shear rate; and evaluating a first risk index of stroke of the patient according to the blood flow parameters. The application solves the problem of weak prediction ability of risk evaluation in the prior art, achieves the effect of individualized prediction of the risk of stroke according to the cardiac image of the patient, and improves the prediction accuracy.

Devices and methods can be used to treat of heart conditions, hypertension, and other medical disorders. For example, devices and methods for treating atrial fibrillation by performing thoracic vein ablation procedures, including pulmonary vein myocardium ablation are described herein. In some embodiments, the ablation is performed in coordination with the delivery a pharmacological agent that can abate the formation of tissue stenosis or neointimal hyperplasia caused by the ablation.

The invention discloses a blood circulation simulation device for a vascular intervention operation, and the device comprises a vein simulation pipeline which is provided with a vena cava, a pulmonary vein, and a vein capillary; the artery simulation pipeline is provided with an aorta, a pulmonary artery and an arterial capillary; the heart simulation pump is provided with a left atrium, a left ventricle, a right atrium and a right ventricle; the vena cava is communicated with the right atrium, the pulmonary vein is communicated with the left atrium, the aorta is communicated with the left ventricle, and the pulmonary artery is communicated with the right ventricle. Real blood vessels are simulated by arranging the vein simulation pipeline and the artery simulation pipeline, the left atrium, the left ventricle, the right atrium and the right ventricle of a real heart are simulated by arranging the heart simulation pump, the left atrium, the right atrium, the left ventricle and the right ventricle are alternately contracted in an air pressure control mode, and the contraction state of the heart is truly simulated; a real blood flow state is simulated in the vein simulation pipeline and the artery simulation pipeline, and a real interventional operation environment is provided for training and learning.

The application discloses a lung artery and vein extraction method based on a CT image and belongs to the technical field of medical image processing. The method comprises the following steps: performing anisotropic diffusion filtering on a three-dimensional CT image to obtain a smooth image; segmenting a lung parenchyma region from the smooth image to obtain a lung parenchyma mask; obtaining a lung parenchyma image based on the lung parenchyma mask and the smooth image mask; calculating multi-scale Hessian matrix eigenvalues on the lung parenchyma image; calculating a tubular structure enhancement response value according to the eigenvalues to obtain a multi-scale tubular structure enhancement image; performing connected domain analysis on the enhancement image, and screening out lung artery and vein candidate regions according to size and shape characteristics; and distinguishing the lung artery and vein in the candidate regions by using local gray distribution and morphological characteristics to obtain an extraction result.

This invention provides a pulsed electric field ablation system, including an ablation catheter and an ablation device, with the ablation catheter connected to the ablation device. The ablation catheter includes an operating handle, a catheter body, and a treatment head. The operating handle is located at the proximal end of the catheter body, and the treatment head is located at the distal end of the catheter body. The proximal end of the operating handle is connected to the ablation device via a tail wire. The ablation device includes a control system that can control and switch each set of electrodes for impedance measurement or ablation. By measuring voltage and current values ​​using AC signals, the impedance between electrodes is calculated. The impedance value is used to determine whether the electrodes are in good contact with the myocardial tissue. Good contact improves the effectiveness of ablation energy reaching the target point. Different electrode pairings are achieved through a switching circuit. Then, the optimal electrode combination is selected for discharge based on the judgment, forming a transverse, vertical, oblique, and intermittent discharge electric field, thus obtaining the optimal surgical ablation plan for different pulmonary vein morphologies.

The utility model discloses a simulation device for cardiac ultrasound training, which comprises a shell and a heart model, the heart model is provided with a vein tube, a pulmonary artery tube, a pulmonary vein tube and an aortic tube, and the pulmonary artery tube and the pulmonary vein tube are both provided with branch blood vessels. A first water tank, a second water tank, a first circulating device and a second circulating device are arranged in the shell, and the first circulating device enables water in the first water tank to sequentially pass through the venous duct, the pulmonary artery duct and a branch blood vessel on the pulmonary artery duct and return to the first water tank. According to the simulation device for cardiac ultrasonic training, pulsation adjustment can be achieved by controlling work of the two pump bodies so as to simulate beating of the heart at different frequencies, meanwhile, simulation of states such as arrhythmia is supported, the function design of the simulation device can be met for complex control requirements, and the whole device is simple in structure, small in size, low in cost and convenient to use. The flow control requirement can be met, and use is convenient.

The present disclosure relates to the technical field of medical images, and discloses a lung lesion identification method and device and an electronic device. The method comprises: acquiring a scan image of a patient's lung, identifying a pulmonary artery region and a pulmonary vein region of the lung in the scan image; acquiring a size parameter of each blood vessel in the pulmonary artery region and the pulmonary vein region, calculating a blood vessel feature of each blood vessel region according to the size parameter of each blood vessel in the pulmonary artery region and the pulmonary vein region; fusing the blood vessel feature of each blood vessel region with a previously acquired lung parenchyma structure feature of the patient's lung to obtain a fused feature; and inputting the fused feature into a previously trained classifier to identify a lung lesion evaluation result of the patient. The above method distinguishes the pulmonary artery and vein, quantifies the features, fuses the emphysema and airway multi-dimensional lesion indicators, and improves the comprehensiveness and accuracy of lung lesion identification. Meanwhile, the method does not require complex data support, simplifies the process, and reduces application costs.

This invention proposes a method and system for predicting the content of Typha pollen based on a hyperspectral dual-stream multi-scale CNN, belonging to the field of quality detection of traditional Chinese medicinal materials. The method includes: acquiring hyperspectral image data of Typha pollen samples; preprocessing the acquired hyperspectral image data and extracting the region of interest (ROI) spectral data of the Typha pollen samples; inputting the extracted ROI spectral data into a trained dual-stream multi-scale residual fusion CNN model, using VNIR and NIR multi-scale branches for multi-scale feature extraction and fusion, and outputting multi-scale fused features; inputting the multi-scale fused features into an attention fusion module, and outputting the final fused features; based on the final fused features, outputting the predicted content of the effective components of Typha pollen through a content prediction layer. This invention solves the problems of low efficiency, sample destruction, and insufficient accuracy caused by existing spectral models ignoring band characteristic differences in traditional detection methods, achieving rapid, non-destructive, and high-precision prediction of Typha pollen content.

Methods and apparatus for providing pulsed electrical therapy, including high voltage, sub-microsecond pulsed electrical energy, to a body vessel are disclosed. The device may include a deployable electrode conforming to a transition surface of a sinus including a pulmonary vein.

Methods and apparatus for providing pulsed electrical therapy (including high voltage, sub-microsecond pulsed electrical energy) to a body vessel are disclosed.SOLUTION: The device may include deployable electrodes that conform to a transition surface that includes the antrum of the pulmonary vein.SELECTED DRAWING: Figure 4C

An apparatus for prediction of repeat ablation efficacy, the apparatus including an electrocardiogram device, wherein the electrocardiogram device is configured to detect post-ablation arrhythmic electrocardiogram (ECG) data representative of a post-ablation arrythmia of a patient who has previously undergone an ablation procedure and a processor configured to receive, from the electrocardiogram device, the post-ablation arrhythmic ECG data predict, using a repeat-ablation efficacy machine-learning model, a determination of a pulmonary vein reconnection by identifying features within the post-ablation arrhythmic ECG data that are historically representative of pulmonary vein reconnection determinations and transmit, for display, the determination.

It is an object to provide one or more methods and / or devices for facilitating the monitoring of physiological parameters associated with the left atrium using one or more sensor implant devices implanted in or into one or more pulmonary veins and / or associated anatomy / tissue.SOLUTION: The sensor retention structure includes a sensor support strut and means for securing the sensor device to the sensor support strut. The sensor support arm may be configured to have an at least partially cylindrical sensor device disposed thereon, and may be associated with one or more sensor retention fingers protruding from the sensor support arm and / or a cage structure configured to be secured to the sensor device.SELECTED DRAWING: Figure 6

The instant disclosure relates to electrophysiology catheters for tissue ablation within a cardiac muscle, for example. In particular, the instant disclosure relates to an electrophysiology ablation balloon catheter with a combination of coated and uncoated surfaces for focusing ablation energy at a desired portion of tissue.