14 results about "Vascular anatomy" patented technology

The invention provides a medical image processing method and a medical image processing device, which can pre-construct a three-dimensional target path image in an occluded blood vessel and solve the technical blind area that the dissection path of a far-end blood vessel cannot be developed due to the fact that a contrast agent cannot pass through the occluded blood vessel in traditional DSA radiography. Moreover, the three-dimensional target path image and a three-dimensional angiography image obtained in the operation can be registered and fused based on a preset mark point to obtain a fused image, and the fused image and the two-dimensional perspective image of the focus area of the patient are registered and fused to obtain a fused image. Accurate space alignment and dynamic superposition of the preoperative three-dimensional target path image, the intraoperative three-dimensional angiography image and the intraoperative two-dimensional perspective image are achieved, a whole-process visible accurate space positioning reference is provided for instrument pushing and vascular access selection of an operator, and the accuracy of surgical operation is improved.

The invention discloses a micro-catheter control method for an acute cerebral infarction interventional thrombectomy, which comprises the following steps: a micro-catheter control system acquires current position state information of a micro-catheter, and drives the micro-catheter to move to a target position according to preset parameters; three-dimensional position coordinates of the microcatheter are obtained in real time through an information acquisition module; the signal processing unit compares the actual position of the microcatheter with a preset target position in real time, judges whether the microcatheter reaches the preset position or not, and receives manually input adjustment parameters when it is monitored that the resistance exceeds a threshold value or the position deviates from a path; and the signal processing unit regenerates a control instruction based on the updated parameters, and drives the microcatheter to continuously move according to the corrected parameter constraint. By acquiring the illness state and blood vessel anatomical structure information of a patient, setting the parameters such as the target position and the moving path of the microcatheter and combining the three-dimensional position coordinate information acquired by the position sensor, the microcatheter can be accurately controlled to reach the target position and move according to the preset path.

A system for improving the function of a defective heart includes a tubular membrane, a replacement valve, a set of one or more inlets, and a set of one or more outlets. The tubular membrane encompasses (i) a first chamber of the system, shaped to conform to an interior region of a right atrium of the heart, and (ii) a second chamber of the system, shaped to conform to an interior region of a right ventricle of the heart. The replacement valve is configured to separate the first chamber from the second chamber, and has leaflets for providing flow in only one direction. The one or more inlets connect the first chamber with a first portion of cardiovascular anatomy, and the one or more outlets connect the second chamber with a second portion of cardiovascular anatomy.

This invention discloses an independent drive and collaborative control method for a double-layer medical catheter, comprising the following steps: drive system configuration; sensing data acquisition; collaborative control model construction; drive command generation; drive execution and dynamic adjustment; and safety protection. This invention achieves high-precision independent drive of the two layers of catheters by configuring independent drive units and multi-dimensional sensing modules for the double-layer catheter. Combined with Kalman filtering and PID control algorithms, the positioning error of the inner catheter is controlled within 0.1mm, and the posture adjustment accuracy of the outer catheter is improved by 40%, significantly outperforming existing technologies. Through variable-parameter PID control and operation intention prediction adjustment, the drive response time is shortened to within 50ms, eliminating the lag defects of traditional control and achieving instant matching between the doctor's operation intention and catheter movement, improving the smoothness of surgical operations. The dynamic collaborative control model built based on reinforcement learning can adaptively adjust the collaborative relationship according to vascular anatomy, lesion location, and real-time load data.

COMPUTER-IMPLEMENTED METHOD FOR ESTIMATING THE FRACTION OF CORONARY RESERVE FLOW, SYSTEM Method for estimating the fraction of coronary reserve flow (FFR) of a vessel comprising: Acquisition (ACQ1) of a first image from an imaging system; Extraction (EXT1) of a first set of data (ENS1) defining anatomical descriptors of a first vessel; Acquisition (ACQ2) of a second set of data (ENS2) comprising at least the heart rate, systolic pressure and myocardial mass;Generation (GEN1) of an output (S1) defining a prediction of a quantity of coronary flow reserve fraction (FFR) by means of the execution of a first machine learning model (MLA1) to produce an output (S1), said first machine learning model (MLA1) implementing a parameterizable loss function including at least one first factor modeling at least one parameterized physical constraint optimized during the training of said model (MLA1), said parameterized physical constraint resulting in particular from a numerical model of hemodynamic equations (MOD1). Figure for the abstract: Fig.5;

A stent graft apparatus for endovascular treatment of aortic diseases includes a balloon-expandable section and a self-expanding section connected by radial sutures to form a unitary device. The balloon-expandable section comprises a metallic framework configured for deployment via balloon inflation and includes a plurality of radially equidistant radiopaque markers for fluoroscopic visualization. The self-expanding section comprises a shape-memory material configured to exert continuous radial force upon release. The connected sections are sequentially deployed through a catheter-based delivery system, allowing the balloon-expandable section to anchor the graft precisely at the treatment site before the self-expanding section is released to conform to the vessel anatomy. This configuration facilitates both accurate positioning and anatomical adaptability, reducing the risk of migration and improving fixation in complex aortic regions. The apparatus may be used to treat aneurysms, dissections, or injuries in various segments of the aorta.

A vascular access guidance platform provides enhanced visualization and accuracy for medical procedures through an integrated extended reality system. The platform comprises an extended reality visualization system configured to display three-dimensional holograms overlaid on patient anatomy, a registration and tracking system for spatial alignment between virtual and physical anatomy, multiple imaging sensors including infrared cameras and ultrasound devices, and a processing system with coordinate transformation algorithms. The system captures anatomical imaging data, generates augmented representations of vascular anatomy, and aligns these representations with physical patient anatomy using registration techniques including optical markers, spatial mapping, and bony landmark registration. The platform maintains real-time tracking capabilities throughout procedures, accommodating patient movement and practitioner repositioning. Applications include intravenous therapy, hemodialysis access, and blood sampling procedures.

The present invention is entitled "Pressure Release Feature for Flushable RF Balloon Catheter". An apparatus includes a catheter shaft assembly and an end effector positioned at a distal end of the catheter shaft assembly. The end effector includes a balloon, one or more electrodes positioned on the balloon, and a tip assembly positioned at a distal end of the balloon. The balloon defines an interior configured to receive fluid to inflate the balloon. The balloon is sized and configured to fit within a cardiovascular anatomy. The tip assembly includes a pressure release valve configured to transition between a sealed state and a pressure release state. In the sealed state, the pressure release valve is configured to prevent fluid from leaking out of the interior of the balloon via the pressure release valve. In the pressure release state, the pressure release valve is configured to provide a path for fluid to leak from the interior of the balloon via the pressure release valve.

A vascular access guidance platform (100) provides enhanced visualization and accuracy for medical procedures through an integrated extended reality system. The platform (100) comprises an extended reality visualization system (102) configured to display three-dimensional holograms overlaid on patient anatomy, a registration and tracking system (104) for spatial alignment between virtual and physical anatomy, multiple imaging sensors (110) including infrared cameras and ultrasound devices, and a processing system (106) with coordinate transformation algorithms. The system captures anatomical imaging data, generates augmented representations of vascular anatomy, and aligns these representations with physical patient anatomy using registration techniques including optical markers, spatial mapping, and bony landmark registration. The registration and tracking system (104) utilizes registration sensors (112) and registration targets (114) positioned at predetermined anatomical locations. The platform (100) maintains real-time tracking capabilities throughout procedures, accommodating patient movement and practitioner repositioning. Applications include intravenous therapy, hemodialysis access, and blood sampling procedures.

This application discloses a covered stent comprising multiple first annular structures and multiple second annular structures distributed axially. The surface of each first annular structure is covered and connected to form a covered segment, exhibiting good flexibility and adaptability to complex vascular anatomy. The axial ends of the second annular structures are provided with winding rings, and adjacent second annular structures are interlocked via these winding rings to form a distal stent segment. This structure effectively resists axial shortening and provides stable distal anchoring. The first annular structure at the end of the covered segment and the second annular structure at the beginning of the distal stent segment are also interlocked via winding rings, achieving a reliable connection between the two segments. A third annular structure may also be provided in the distal stent segment to enhance connection stability. Through a zoned design, this application ensures overall stent flexibility and adherence to the vessel wall while extending the distal anchoring area and maintaining unobstructed branch blood flow, significantly improving the clinical efficacy of endovascular repair of branch vessels.

Embodiments include a method for processing images to determine cardiovascular information. The method may include receiving medical imaging data of a patient and segmenting a plurality of computational model candidates for an anatomical model of a vessel including a stenosis region. Segmenting may include generating the plurality of computational model candidates, determining one or more candidate collocation points, assigning a refinement criterion to each collocation point, freezing each collocation point based on whether a termination criterion is met, and repeating until all collocation points are frozen. The method may further include computing one or more pieces of cardiovascular information for the stenosis region in each computational model candidate, determining whether a variation among values meets a threshold associated with a clinical decision regarding the stenosis region, and outputting images, indicators, reports, or simulations indicating information relating to the cardiovascular information.

This application relates to a delivery assembly and delivery system. The inner catheter is provided with a connecting structure, which includes at least two connecting parts. An outer catheter is movably sleeved outside the inner catheter. A stent-accommodating space is formed between the inner wall of the outer catheter and the outer wall of the inner catheter to accommodate the target stent. The stent-accommodating space is used to accommodate the target stent. A binding structure includes at least two binding threads for binding the target stent. Each binding thread is detachably connected to a connecting part of the connecting structure. Considering the differences in vascular anatomy among individuals, and because the proximal insertion window of the main stent of the target stent is adjustable, and the position of the branch stent relative to the branch vessel is adjustable, the probability of interference between the branch device and the main stent during delivery of branch devices can be effectively reduced, avoiding risks such as deformation, displacement, or kinking of the main stent.

The application discloses a cavity tube support body, which comprises a plurality of support wave rings and one or more connecting structures arranged between two adjacent support wave rings. A left and right rotatable connecting rod is arranged on the connecting structure. The connecting rod comprises a base, a pin shaft and a fixing cap. In the releasing process of the tube support body, the connecting points are displaced in the plane along with the bending degree of the blood vessel, so that the support wave rings can adapt to the natural deformation of the blood vessel, effectively reduce the stress and strain between the adjacent support wave rings, and improve the fatigue performance. The structure can comply with the effective scheme of the original blood vessel dissection and movement direction under the premise of guaranteeing the high radial support force.