92 results about "Target vessel" patented technology

Needle-guiding systems and methods can facilitate establishing vascular access with a nonmagnetic needle. For example, a method of a needle-guiding system can include detecting and registering registration marks about a patient by patient-facing cameras of an alternative reality (“AR”) device, the AR device thereby establishing its location and orientation relative to a target area of the patient. The method can also include anchoring ultrasound images of the target area as viewed through a display screen of the AR device, the ultrasound images anchored about the patient relative to either an instant or previous location and orientation of the ultrasound probe; and providing an instant virtual needle trajectory of the needle as viewed through the display screen of the AR device, thereby indicating to a clinician whether the needle is properly oriented for establishing vascular access to a target vessel of the ultrasound images.

Needle-guiding systems and methods can facilitate establishing vascular access with a nonmagnetic needle. For example, a method of a needle-guiding system can include detecting and registering registration marks about a patient by patient-facing cameras of an alternative reality ("AR") device, the AR device thereby establishing its location and orientation relative to a target area of the patient. The method can also include anchoring ultrasound images of the target area as viewed through a display screen of the AR device, the ultrasound images anchored about the patient relative to either an instant or previous location and orientation of the ultrasound probe; and providing an instant virtual needle trajectory of the needle as viewed through the display screen of the AR device, thereby indicating to a clinician whether the needle is properly oriented for establishing vascular access to a target vessel of the ultrasound images.

Systems and methods are provided for reducing the reliance on operator skill during vascular ultrasound procedures. The placement of an ultrasound probe to assess perfusion associated with a wound may be facilitated by receiving input suitable for identifying an anatomical region associated with the wound and providing an indication of a suitable initial probe position, and optionally, probe orientation, for acoustically interrogating a target arterial vessel known to provide perfusion to the anatomical region associated with the wound. Regions exhibiting arterial flow may be detected as the probe is moved, enabling arterial vessel detection and localization. A subregion within the detected arterial vessel and a beam steering angle may be autonomously determined for spectral Doppler data collection, enabling the measurement of hemodynamic measures associated with the arterial vessel. Example apparatus for securing the probe to the patient and facilitating probe positioning to search for a target vessel are disclosed.

A vascular image processing method performed by a processor includes extracting, from a vascular image, a first vascular region corresponding to an entire blood vessel included in the vascular image, a second vascular region corresponding to a target vessel and one or more branch vessels connected to the target vessel, and a third vascular region corresponding to the target vessel, and predicting a vascular structure in the vascular image, based on the first vascular region, the second vascular region, and the third vascular region, which are extracted from the vascular image.

A stenosis assessment method and device based on the intracranial digital subtraction angiographic (DSA) imaging, including acquiring the intracranial DSA imaging and extracting two planar images containing the target blood vessel from the DSA imaging, wherein the two planar images have different shooting angles. According to the two planar images, a 3D model of the target vessel is established. Based on the established 3D model of the target vessel and the DSA imaging, the hemodynamic simulation of the target vessel is performed. The disclosure realizes the functional assessment of intracranial vascular stenosis, improves the diagnostic accuracy, and provides certain assistance for neurologists to determine intervention means. The disclosure of noninvasive FFR technology in the assessment of intracranial vascular stenosis can only rely on angiography for functional assessment, saving the medical examination cost of patients. It has more convenient operation and higher repeatability.

A vascular occlusion catheter may be employed for at least partial occlusion of a target vessel. The vascular occlusion catheter system includes a proximal catheter shaft having at least one internal lumen, and a distal catheter shaft terminating in an atraumatic tip. An occlusion balloon is sealingly mounted to the proximal and distal catheter shafts. A central catheter shaft extends through the proximal catheter shaft, the occlusion balloon and into the distal catheter shaft. The proximal catheter shaft is secured to the central catheter shaft on a proximal side of the occlusion balloon and the distal catheter shaft is secured to the central catheter shaft on a distal side of the occlusion balloon. The occlusion balloon, the proximal catheter shaft and the distal catheter shaft have a greatest outer diameter of less than seven French (7 Fr) in an uninflated condition.

The invention discloses a cerebral artery blood flow velocity prediction method, device and equipment and a medium, and relates to the field of blood flow velocity prediction.The method comprises the steps that cerebral artery nuclear magnetic imaging data are obtained and preprocessed; performing image segmentation to obtain a cerebral artery three-dimensional model; extracting geometric topology information of the cerebral artery; constructing a 0-1-dimensional geometric multi-scale model of the crowd averaged cerebral artery; determining entrance boundary conditions of the 0-1-dimensional model to obtain a 0-1-dimensional patient personalized hemodynamic model; according to a clinical preset contrast agent concentration-time curve and based on the law of conservation of mass, a 0-1-dimensional patient personalized hemodynamic model is used for simulating a contrast agent injection process, and a contrast agent concentration-time curve of each position in the cerebral artery topology network is obtained; based on the concentration data of the contrast agent at the near end and the far end of the target blood vessel, the flow velocity of the contrast agent at different blood vessel segments of the cerebral artery is determined, and the method can be suitable for blood flow velocity estimation of an artery system with a complex topological structure.

An apparatus includes a cart having a vertical adjustment element configured to adjust a distance between the platform and a ground supporting the cart, the cart defining a surface for supporting an arm of the patient. The apparatus includes a manipulation device including a plurality of motors each configured to operably couple to a different one of a needle, a catheter, and a guidewire to selectively advance one or more of the needle, the catheter, and the guidewire, and a robotic arm having a first end mounted to the cart and a second end coupled to the manipulation device, the robotic arm having a plurality of segments joined together via a plurality of joints such that the robotic arm can be moved to position the needle, the catheter, and the guidewire for insertion into a target vessel in the arm.

A vessel harvesting system removes a target vessel from a patient for use as a bypass. An elongated harvesting instrument inserts into a body along a path of a target vessel which includes at least one side branch. The harvesting instrument includes a cutter for applying thermal energy to sever and cauterize the side branch. An endoscopic camera captures visible-light images from a distal tip of the instrument within a dissected tunnel around the target vessel. A thermal camera captures thermograms coinciding with the visible-light images to characterize a temperature present at respective surfaces in the tunnel. An image processor (e.g., an electronic controller) renders a video stream including the visible-light images and an overlay depicting the temperatures present on at least some of the respective surfaces when applying the thermal energy. A display presenting the video stream and overlay to a user can be an augmented-reality display.

Systems, devices and methods are disclosed for selectively accessing a target blood vessel and facilitating the advancement of treatment devices within the neurovasculature. The method includes causing an elongate device to adopt a series of curved configurations, which aim and move a distal end of the device toward a target vessel. Once a portion of the elongate device is located within a vessel, the curved configurations may be manipulated to employ active bracing features to allow an inner device to advance through the vessel in a controlled manner. The elongate device may then track over the inner device, using the inner device as a rail. Portions of the elongate device are configured to facilitate bracing where the curves contact the vessel walls.

This document discloses a needle shield for an ultrasound probe. The shield fits snugly with the ultrasound probe head and any associated structures, protecting it from accidental damage such as needlesticks. Furthermore, the shield includes a guide wedge that allows the user to stabilize the probe at an angle relative to the skin surface. This allows the needle to enter the target vessel perpendicularly without the probe obstructing the needle. Furthermore, the shield includes an acoustic lens to modify the acoustic beam and compensate for the angular position of the probe head.

Optical transmission microcatheter devices and methods of endovascular embolization are described herein. A microcatheter device is provided that includes a working lumen and a mechanical protection waveguide. The working lumen has at least one outlet port at a distal end of the working lumen and is configured to provide an intravascular injection of a photoactivated embolic agent (PEA) to a target vessel via the at least one outlet port. The mechanical protection waveguide (MPW) is operatively connected to the working lumen and configured to emit at least one electromagnetic wave via the at least one outlet port for delivery to the target blood vessel.

This application relates to the field of medical device technology and provides an occlusion device. The occlusion device includes a catheter body, an occlusion component, and a multidimensional contact guide. When the multidimensional contact guide enters a vascular dissection or a non-target vessel, the sidewall of the multidimensional contact guide of the occlusion device can form an annular contact area or at least two sub-contact areas with the inner wall of the vessel, thereby encountering resistance and preventing the catheter from being further advanced. This avoids vascular damage caused by the occlusion component filling in branches or non-target vessels. The multidimensional contact guide is used to guide the movement of the catheter body and buffer the elastic deformation force of the distal end of the catheter body when the occlusion component is depressurized. The occlusion device provided by this application can guide the occlusion component into the target occlusion area, avoiding entry into vascular dissection or non-target vessels; and buffer the elastic deformation force of the distal end of the catheter body when the occlusion component is depressurized, preventing the distal end of the occlusion device from puncturing the vessel.

The present application relates to a coronary artery segmentation method based on a continuous frame sequence of DSA images, a computer device, and a readable storage medium. The method includes: obtaining a training data set, the training data set including an input data set and an output data set, the input data set being the first continuous frame with a sequence length of N in the continuous frame sequence of coronary DSA images, and the output data set being an intermediate frame pre-labeled with a target vessel and located in the middle of the first continuous frame; using the training data set to train a deep learning network model: the deep learning network model includes a feature fusion device, an encoder, and a decoder, the feature fusion device performs feature fusion on the first continuous frame to obtain a three-dimensional image, the three-dimensional image passes through the encoder and decoder in sequence, and the output of the decoder is connected to the intermediate frame; continuously training until a trained deep learning network model is obtained, using the trained deep learning network model to detect the input continuous frame sequence of coronary DSA images, and outputting a segmentation prediction map of the target vessel.

A vascular closure device and a delivery system. The delivery system comprises the vascular closure device and a delivery tube. The delivery tube is used to deliver the vascular closure device to a predetermined position. The vascular closure device comprises an anchoring assembly and a limiting assembly. The anchoring assembly comprises a first anchoring member and a connecting tube, with the first anchoring member sleeved on the outside of the connecting tube. The limiting assembly comprises a limiting foot fixedly connected to the connecting tube. The first anchoring member is configured to be positioned at a first predetermined position outside a target vessel. The connecting tube is configured to pass through a gap in the target vessel, so as to position the limiting foot inside the target vessel. The limiting foot is configured to anchor at the gap. The first anchoring member is configured to cooperate with the limiting foot to clamp and close the gap. The vascular closure device is easy to operate, minimizes implant displacement, reduces the risk of vascular complications, and exhibits excellent consistency during vessel closure, thereby enhancing surgical safety and reliability.

A device for vascular access is described herein. The apparatus may include a manipulating device configured to releasably couple a cartridge including a needle, a catheter, and a guidewire disposed coaxially with respect to one another, and a robotic arm coupled to the manipulating device. The manipulating device or cartridge may include a plurality of actuation mechanisms configured to selectively advance the needle, catheter, and guidewire when the manipulating device is coupled to the cartridge. The robotic arm may include a plurality of joints configured to rotate about a plurality of axes to position the cartridge relative to the patient's arm such that the needles, catheters, and guidewires may be inserted into the patient's target blood vessel.

Systems and methods are provided for reducing the reliance on operator skill during vascular ultrasound procedures. The placement of an ultrasound probe to assess perfusion associated with a wound may be facilitated by receiving input suitable for identifying an anatomical region associated with the wound and providing an indication of a suitable initial probe position, and optionally, probe orientation, for acoustically interrogating a target arterial vessel known to provide perfusion to the anatomical region associated with the wound. Regions exhibiting arterial flow may be detected as the probe is moved, enabling arterial vessel detection and localization. A subregion within the detected arterial vessel and a beam steering angle may be autonomously determined for spectral Doppler data collection, enabling the measurement of hemodynamic measures associated with the arterial vessel. Example apparatus for securing the probe to the patient and facilitating probe positioning to search for a target vessel are disclosed.

A vascular repair device includes a hydrogel substrate configured to be positioned at least partially around a target vessel, a biodegradable adhesive configured to be positioned at least partially around the hydrogel substrate, and a biodegradable mold defining a trough sized to accommodate at least a portion of the target vessel and configured to contain at least a portion of the biodegradable adhesive.

This invention discloses a medical image processing method, device, medium, and product, relating to the field of medical image processing technology. The method includes: acquiring the segmentation results of hemangioma and tumor-bearing vessels in a scanned image of a target vessel; determining a first point set for the hemangioma based on the hemangioma segmentation results; determining a second point set for the tumor-bearing vessels based on the tumor-bearing vessel segmentation results; determining a bidirectional neighboring point set for the first and second point sets, each bidirectional neighboring point set including at least three non-collinear pixels; determining a plane equation for the tumor diameter plane based on the bidirectional neighboring point set; determining the intersection points of the plane containing the plane equation with the first and second point sets, and using the plane enclosed by all intersection points as the tumor diameter plane. The technical solution provided by this invention solves the technical problem of slow speed in existing tumor diameter plane determination methods, improving the speed of tumor diameter plane determination.

Systems, devices, and methods for providing procedure-specific workflow guidance are provided. The workflow guidance may include providing selectable options on a display device to a user including a selectable option to select a target vessel and a prompt to move an intravascular imaging device within the selected target vessel. Imaging data is received from the intravascular imaging device within the selected target vessel. The workflow guidance may be used to identify an area of interest within the selected target vessel and automatically display vessel measurements corresponding with the area of interest on the display device.

Methods and systems for optimizing perivascular neuromodulation therapy using computational fluid dynamics. Digital data related to three-dimensional imaging of a target vessel and corresponding hemodynamic data are inputs for generating a computational fluid dynamics (CFD) model. The CFD model enables identification of one or more regions of the vessel suitable for neuromodulation therapy and / or identification of one or more regions of the vessel to be avoided during therapy. Systems of the present technology may include a neuromodulation catheter, a computing device that can generate and analyze the CFD model, and a user interface for displaying the vessel with markers for target regions and / or avoidance regions.

Systems, devices, and methods for transvascular ablation of target tissue. The devices and methods are for splanchnic nerve ablation to increase splanchnic venous blood capacitance to treat at least one of heart failure and hypertension. The devices are advanced endovascularly to a target vessel in the region of a thoracic splanchnic nerve (TSN), such as a greater splanchnic nerve (GSN) or a TSN nerve root. Also disclosed are methods of treating heart failure, such as HFpEF, by endovascularly ablating a thoracic splanchnic nerve to increase venous capacitance and reduce pulmonary blood pressure.

The disclosure includes a vein ablation system, comprising a catheter having an elongated body. In some embodiments, the vein ablation system comprises an ablation device at a distal portion of the elongated body. According to some embodiments, the vein ablation system comprises a control device at a proximal portion of the elongated body. The control device may comprise an input mechanism configured to simultaneously control at least two of a longitudinal translation of the ablation device through a target vessel, a rotation of the ablation device about a central longitudinal axis, and an infusion of a chemical agent into the target vessel.

Patient monitoring for cardiophysiological function can include receiving an ultrasound waveform from a pulsed-wave ultrasound transducer array. The transducer array can be fixed externally on a patient to monitor a target vessel. Waveform fiducials can be identified from the ultrasound waveform indicating patient blood flow characteristics. Based on these fiducials, an ultrasound diagnostic indication of left ventricular ejection time (LVET) can be determined. A patient's cardiophysiological function can be assessed by combining the ultrasound diagnostic indication with bioimpedance cardiac waveform data.

The present invention describes a system and method for accessing small arteries for delivering a catheter to a target vessel, such as a cerebral vessel. In particular, the present invention describes a system that allows for direct introduction of a catheter through a vascular opening without an external sheath. The distal tip of the catheter is protected by a protective cover. Methods for introducing the catheter into the vessel and a kit are also described.

The invention discloses a myocardial perfusion quantitative evaluation method. The method comprises the following steps: acquiring an X-ray angiography image target sequence and a computed tomography angiography image of a target blood vessel; determining the volume of a target blood vessel of each X-ray radiography image in the X-ray radiography image target sequence, obtaining the maximum volume and the minimum volume of the target blood vessel from the beginning of filling to the end of filling, and further determining a blood flow volume, and recording the blood flow volume as an initial blood flow volume; according to the computed tomography angiography image, determining the mass or volume of the myocardial area perfused by the target blood vessel to obtain the mass or volume of the target myocardial; carrying out image fusion, and further determining the distribution condition of the target blood vessel on the myocardium; determining target blood flow corresponding to the target blood vessels according to the initial blood flow and the distribution condition of the target blood vessels on the myocardium, and further calculating a quantitative myocardial perfusion value. The method can accurately obtain the quantitative myocardial perfusion value. The invention further discloses a myocardial perfusion quantitative evaluation device, electronic equipment and a storage medium.

A hybrid modular endovascular graft wherein a main graft is sized to span at least a portion of a target vessel lesion in a large percentage of patients. Graft extensions may be secured to the main graft to extend the main graft and provide a sealing function for some applications.

A multi-element, vascular stent may be used to maintain or enhance patency of a blood vessel. The stent may be used in peripheral blood vessels, which may be long and / or tortuous. By using multiple, separate stent elements that are balloon expandable, the multi-element stent may be stronger than a traditional self-expanding stent but may also be more flexible, due to its multiple-element configuration, than a traditional balloon-expandable stent. Individual stent elements shorten upon expansion creating a space between stent elements. The distance between stent elements when deployed may be based on characteristics of the stent and the target vessel location such that the stent elements do not touch one another during skeletal movement. Thus, the multi-element, vascular stent described herein may be particularly advantageous for treating long lesions in tortuous peripheral blood vessels

An apparatus for vascular access is described herein. The apparatus can comprise a manipulating device configured to releasably couple a cartridge including a needle, a catheter, and a guidewire that are coaxially disposed with respect to each other, and a robotic arm coupled to the manipulating device. The manipulation device or cartridge can include a plurality of actuation mechanisms configured to advance the needle, the catheter, and the guidewire when the manipulating device is coupled to the cartridge. The robotic arm can include a plurality of joints that are configured to rotate about a plurality of axes to position the cartridge relative to the arm of the patient such that the needle, the catheter, and the guidewire can be inserted into a target vessel of the patient.

The invention provides an intracranial atherosclerotic plaque progress early warning system and method based on multi-stage MRA image and multi-modal blood flow parameter fusion, and is applied to the technical field of medical data processing. The method comprises the following steps: on the basis of a patient baseline, a follow-up period MRA image and a black blood sequence magnetic resonance image, firstly obtaining blood vessel binary volume data through a blood vessel segmentation technology, and generating a blood vessel geometric model through curved surface construction and triangularization; and converting the target blood vessel into a surface model, processing and encrypting the narrow area by using gridding software to obtain a target blood vessel grid, and further obtaining whole-brain whole-brain hemodynamic parameters. Subsequently, a high-risk area is determined according to blood flow parameter characteristic values of an anatomical segment, a structured matrix is established, parameter change abnormity is compared, a plaque progress index is defined, after parameter differences are grouped and compared, a risk prediction model is established by fusing various types of information, and finally, a multi-dimensional visualization and quantification result is generated by combining three-dimensional blood vessel space information. And support is provided for early warning of the progress of the intracranial atherosclerotic