15 results about "Ventricular cavity" patented technology

The invention relates to a multifunctional heart pulsation simulation system, which comprises a ventricle simulation mechanism, an atrium simulation mechanism, an artery simulation mechanism and a backwater mechanism, and is characterized in that the ventricle simulation mechanism comprises a ventricle cavity and a pulsation pump; the atrial simulation mechanism comprises an atrial cavity connected with the ventricular cavity and an atrial compliance cavity connected with the atrial cavity, and a first valve carrier is detachably mounted at the joint of the ventricular cavity and the atrial cavity; the artery simulation mechanism comprises an artery water inlet cavity connected with the ventricular cavity, an artery water outlet cavity connected with the artery water inlet cavity, an artery compliance cavity arranged at the top of the artery water outlet cavity and an artery root compliance cavity arranged at the bottom of the artery water outlet cavity; a second valve carrier is detachably mounted at the joint of the artery water inlet cavity and the artery water outlet cavity; the water return mechanism is connected between the atrial compliance cavity and the artery compliance cavity. According to the invention, two types of valves are simultaneously placed in the system for testing, so that the accuracy of a test result is effectively improved.

The present application relates to a TAVR teaching model based on blood flow simulation and multi-modal image fusion and use method. The model comprises a simulated thoracic and abdominal cavity with a built-in heart wave beat simulation part that drives fluid to generate pulsatile blood flow, a simulated thoracic and abdominal body with pre-set vascular access, a bionic heart assembly with structures such as a ventricular cavity, a pathological valve module that can be detachably fitted to the aortic valve ring and contains a pressure sensor array and simulated calcification, a coronary circulation monitoring module that monitors the perfusion state of the coronary artery opening, a virtual fluoroscopy positioning module that generates real-time fluoroscopy images, and a central control console that electrically cooperates with each module. The scheme simulates the tactile sensation of calcification through the pathological valve module, the heart wave beat simulation part reproduces the physiological pressure difference with a closed loop blood flow, realizes image navigation training with non-radiation virtual fluoroscopy, integrates real-time simulation of complications with coronary monitoring and annulus pressure sensing, and solves the problems of existing models such as distorted hand feeling, inaccurate dynamics, dependence on radiation, and lack of complication training.

The utility model discloses a ventricle simulation device and an in-vitro amplification test system. The ventricle simulation device comprises a simulation ventricle, a mounting frame and a guide rail sliding block assembly. The simulated ventricle is provided with a ventricle cavity, the mounting rack is used for mounting the simulated ventricle, and the guide rail slide block assembly comprises a guide rail and a slide block and is arranged between the simulated ventricle and the mounting rack to realize relative sliding between the simulated ventricle and the mounting rack. A user can realize connection and disconnection between the simulation ventricle and other components by moving the simulation ventricle, or the simulation ventricle is utilized to drive a linkage component to be connected and disconnected with other components, rapid connection and disconnection of an in-vitro amplification test loop can be realized, and the test efficiency is improved under the condition that the performance test requirement of a catheter pump model is met. And the rapid dismounting and replacement of the conduit pump model in the in-vitro amplification test system are facilitated.

A flow field testing system and method for a cardiac valve device are disclosed. The flow field testing system includes a ventricular simulation module with a ventricular cavity, which is formed by multiple sidewalls surrounding the cavity. The sidewalls include a first sidewall and a second sidewall that are horizontally opposite each other. A flexible deformable first diaphragm and a second diaphragm are respectively disposed on the first sidewall and the second sidewall. The first diaphragm and the second diaphragm are separated by a rigid structure. The ventricular simulation module also includes a driving unit that applies pressure to the first diaphragm and the second diaphragm, respectively, driving the first diaphragm and the second diaphragm to deform simultaneously toward or away from the ventricular cavity to simulate the contraction or relaxation of the ventricle. The flow field testing method applies different pressures to the first diaphragm and the second diaphragm by the driving unit.

The present disclosure provides a cardiac phase recognition method, device, equipment and storage medium, to realize multi-frame automatic segmentation and accurate cardiac phase recognition. The cardiac phase recognition method comprises: selecting an initial segmentation frame in the ventricular contrast sequence image data; performing ventricular boundary recognition based on the feature points marked in the initial segmentation frame to determine the ventricular boundary contour; for the image frame adjacent to the initial segmentation frame, taking the ventricular boundary contour of the initial segmentation frame as the starting contour, emitting a ray in a narrow band range to search for a boundary point in a polar coordinate manner, connecting the boundary points and performing region-driven segmentation to obtain the ventricular boundary contour; taking the image frame as a new initial segmentation frame, repeating the above steps for the next image frame to obtain the full sequence ventricular boundary contour; determining the ventricular cavity area sequence corresponding to the ventricular contrast sequence image data based on the full sequence ventricular boundary contour, and dividing the cardiac phase according to the ventricular cavity area sequence.

Provided are devices and methods for augmenting mitral valve function. A cardiac valve prosthesis device comprises a stent frame assembly having an atrial portion and a ventricular portion, a peripheral ring attached to the stent frame assembly, which divides the stent frame assembly into the atrial and ventricular portions, and a plurality of valve leaflets fixedly coupled to the stent frame assembly. The peripheral ring fits over a native mitral valve annulus when the prosthesis device is implanted in a native mitral valve. The peripheral ring limits the protrusion of the stent frame assembly into a ventricular chamber and reduces the effect on ventricular outflow or excursion of a native leaflet by such protrusion.

The invention relates to the technical field of medical images, and provides a method and equipment for reconstructing a personalized heart model with an infarction region, and a medium. The method comprises the following steps: preprocessing a heart magnetic resonance delay gadolinium enhanced CMR-LGE image of a patient to obtain a first high-resolution tag image containing a ventricular cavity and infarction tissue, and constructing a heart finite element mesh model based on high-precision heart cavity data of the patient; performing direction adjustment on the first high-resolution label image to obtain a second high-resolution label image; and mapping the infarction region in the second high-resolution label image into the heart finite element mesh model to obtain a personalized heart model with the infarction region. Based on the scheme of the invention, the accuracy of the reconstruction of the personalized heart model with the infarction region can be improved.

The present disclosure provides a cardiac phase recognition method, device, equipment and storage medium, to realize multi-frame automatic segmentation and accurate cardiac phase recognition. The cardiac phase recognition method comprises: selecting an initial segmentation frame in the ventricular contrast sequence image data; performing ventricular boundary recognition based on the feature points marked in the initial segmentation frame to determine the ventricular boundary contour; for the image frame adjacent to the initial segmentation frame, taking the ventricular boundary contour of the initial segmentation frame as the starting contour, emitting a ray in a narrow band range to search for a boundary point in a polar coordinate manner, connecting the boundary points and performing region-driven segmentation to obtain the ventricular boundary contour; taking the image frame as a new initial segmentation frame, repeating the above steps for the next image frame to obtain the full sequence ventricular boundary contour; determining the ventricular cavity area sequence corresponding to the ventricular contrast sequence image data based on the full sequence ventricular boundary contour, and dividing the cardiac phase according to the ventricular cavity area sequence.

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.

A method for ventriculostomy of the cavity of the anterior horn of the lateral ventricle in children, characterized by the fact that a calculation is carried out before the start of operative correction, based on the data of preliminary neuroimaging of the brain in the frontal and sagittal planes, while aligning the obtained images along the coordinate axes, the first side in determining the key point is selected in the projection of the widest part of the ventricular cavity, retreating from the coronary suture to the ventral side from 0 mm to 10 mm; the second side in determining the key point is selected in the frontal plane in the projection of the widest cavity of the anterior horn of the lateral ventricle of the brain, from the side of catheter placement, its maximum width is determined, the final result obtained is divided in half, the results of the two sides for determining the key point are transferred to the cranial vault;intraoperatively, a ventricular catheter is inserted through the key point parallel to the sagittal suture, and its insertion tip is directed to the imaginary biauricular line.

An implantable circulatory support system, configured to connect a ventricular chamber of a heart, including a valveless displacement blood pump, a deformable polymeric flow cannula, a pair of male an

Embodiments described herein include devices, systems, and methods for reducing the distance between two locations in tissue. In one embodiment, an anchor may reside within the right ventricle in engagement with the septum. A tension member may extend from that anchor through the septum and an exterior wall of the left ventricle to a second anchor disposed along a surface of the heart. Perforating the exterior wall and the septum from an epicardial approach can provide control over the reshaping of the ventricular chamber. Guiding deployment of the implant from along the epicardial access path and another access path into and through the right ventricle provides control over the movement of the anchor within the ventricle. The joined epicardial pathway and right atrial pathway allows the tension member to be advanced into the heart through the right atrium and pulled into engagement along the epicardial access path.

The invention discloses a multipurpose indwelling cardiac apex puncture cannula and a using method thereof. The cardiac apex puncture cannula comprises a puncture needle, an indwelling sheath tube, a plugging device and a conveying tube. The puncture needle is used for penetrating into the indwelling sheathing canal and guiding the indwelling sheathing canal to puncture the cardiac apex, and an inner cavity of the indwelling sheathing canal is used for establishing a multipurpose channel; the indwelling sheath tube comprises a catheter body and an operating handle, and the operating handle is fixedly connected to the near end of the catheter body; the plugging device comprises a plugging core and a plugging cap. The far end of the plugging core is used for being inserted into an inner cavity of the indwelling sheath tube to plug the multipurpose channel. The plugging cap is fixedly connected to the near end of the plugging core and used for being in sealed connection with the operating handle. The delivery tube can penetrate into the indwelling sheath tube, extends to the ventricular cavity and is used for delivering medical instruments to the ventricular cavity. According to the invention, an interventional pathway which is shorter, safer, higher in adaptability and capable of being indwelled for a long time can be established at the cardiac apex position, and clinical requirements of cardiac structural disease interventional therapy, extracorporeal circulation support, multiple interventional therapy and the like are met.

This invention provides a zebrafish model of hypertrophic cardiomyopathy characterized by ventricular cavity shrinkage and reduced mobility, and a method for constructing the model. Using zebrafish tmem260 as the target gene, CRISPR / Cas9 technology is used to microinject in vitro designed and synthesized tmem260-specific sgRNA and Cas9 protein into wild-type zebrafish fertilized eggs. After successive generations of screening, tmem260 gene-specific knockout zebrafish mutants are obtained. The phenotype of hypertrophic cardiomyopathy characterized by ventricular cavity shrinkage and reduced mobility in the mutants is observed and passaged for conservation.

This invention discloses a method, electronic device, and storage medium for detecting imaging features of hydrocephalus based on neural networks. The method includes collecting and labeling brain imaging data of patients with normal pressure hydrocephalus, and performing preprocessing; using a neural network to segment the ventricular region in thick-slice brain imaging data to generate a binary image sequence; training a neural network model for interpolation using thin-slice brain imaging data, continuously adjusting parameters until optimal; inputting the binary segmentation result of the thick-slice image along with the original thick-slice image into the trained interpolation network, outputting an interpolated binary segmented image; counting the number of voxels in the ventricular portion of the interpolated binary segmented image, and calculating the actual volume of the ventricular cavity based on the image scanning interval information. This invention reduces the error in calculating ventricular volume by segmenting images when the scanning interval is too large, obtaining accurate ventricular volume data, thereby optimizing the computer-aided diagnosis process for hydrocephalus.