106 results about "Vascular lumen" patented technology

Balloon catheters, sleeves, cages, cylindrical structures and endoluminal prostheses are provided with stress-applying and spacing features coupled to expandable surfaces thereof. At least one or at least some stress-applying features are immobilized onto the surface or into pre-formed indentations formed in the expandable surface. The stress-applying and spacing features may have blunt and / or rounded contact regions which contact tissue or calcified regions in the vasculature. The contact regions dent or fracture occlusive material on the wall of a vascular lumen and / or patient valve leaflets when expanded. The spacing of features can permit blood, drug, and contrast perfusion past structures expanded in the vasculature, particularly balloon catheters.

The invention provides a blood vessel image processing analysis method and system combining magnetic resonance blood vessel and blood vessel wall imaging, and the system comprises a data obtaining module which obtains a blood vessel enhancement image and a blood vessel wall image; the image registration module is used for registering the blood vessel wall image to the blood vessel enhanced image to obtain a registered blood vessel wall image; the segmentation module is used for obtaining a blood vessel lumen segmentation result and a blood vessel wall segmentation result; the fusion module is used for carrying out weighted fusion on the blood vessel enhanced image and the registered blood vessel wall image to obtain a fused image; the analysis module is used for calculating an intersection region of a blood vessel lumen segmentation result and a blood vessel wall segmentation result; and the three-dimensional visualization and curved surface reconstruction module is used for performing three-dimensional skeleton extraction and curved surface reconstruction on the three-dimensional connected domain of the suspected occluded blood vessel. According to the method, the information of the blood vessel lumen and the blood vessel wall can be obtained at the same time, the defect of a traditional imaging means in evaluating the condition of the blood vessel wall at the far end of the occluded blood vessel is overcome, and the time needed by preoperative evaluation is remarkably shortened through automatic processing and analysis.

An ultrasound blood vessel imaging system can include a 3D ultrasound probe operable to capture 3D volume data of tissue containing one or more blood vessels. A processor can be in communication with the 3D ultrasound probe and configured to receive the data and convert the data to a volume of ultrasound images. The processor can process the ultrasound images using an image segmentation method to identify a blood vessel lumen independent of surrounding tissue and generate a segmented vessel. The processor can also generate a constructed view of the blood vessel by assembling the segmented vessel and display the constructed view on an electronic display.

A device includes a constricting portion and an anchoring element. The anchoring element anchors the device to an inner wall of a blood vessel. The constricting portion extends from an inlet at a proximal end for receiving blood flow therethrough to at least one outlet at a distal end through which flow is expelled. The constricting portion includes a neck section and tapers from the inlet to the neck section. The tapering defines a space substantially surrounding the constricting portion in which flow expelled from the at least one outlet can freely flow.

The invention provides an optimal estimation method and device for intravascular ultrasound image segmentation, equipment and a medium. The method comprises the following steps: acquiring an intravascular ultrasonic image; performing initial contour segmentation on the intravascular ultrasound image to obtain an initial contour of the intravascular ultrasound image; and performing forward Kalman filtering on the initial contour of the polar coordinate system to obtain an optimal estimated contour of the polar coordinate system. In the mode, the optimal segmentation problem of the blood vessel lumen wall and the vascular membrane contour can be converted into the optimal estimation problem of the contour position by using Kalman filtering, and the Kalman filtering is performed on the position information of the obtained initial contour point to obtain the minimum variance estimation of the contour position. And a stable and accurate contour segmentation result can be obtained.

A method for evaluating plaque load based on OCT images is characterized in that fitting is carried out through the far end and the near end of a blood vessel lumen of the OCT images, a reference lumen at a plaque is fitted out, and then a middle membrane area and a plaque area can be calculated, so that the plaque load condition is evaluated; the imaging length of the intravascular OCT is usually 50-80 mm, the intravascular OCT generally comprises a far end, a lesion part and a near end, and the image of the near end is close to a coronary artery opening and has a larger diameter; the distal end is far away from the coronary opening, the diameter is relatively small, and the diameter of the healthy blood vessel from the proximal end to the distal end generally decreases linearly; when a blood vessel has plaque, the space-occupying effect causes the diameter of the lumen of the blood vessel at the plaque to become smaller. The invention can acquire the real plaque load through the conventional OCT image, provides basis for diagnosis and is beneficial to expanding the scope and quality of OCT diagnosis.

The invention discloses cell-loaded pore-forming hydrogel bio-ink as well as a preparation method and application thereof. The preparation method of the cell-loaded pore-forming hydrogel bio-ink comprises the following steps: preparing filiform or multi-arm sacrificial hydrogel; preparing a matrix hydrogel precursor solution; wherein living cells are loaded in the sacrificial hydrogel and / or the matrix hydrogel precursor solution; the sacrificial hydrogel and the matrix hydrogel precursor solution are mixed, and the cell-loaded pore-forming hydrogel bio-ink is obtained. According to the invention, hydrogel in a special form, such as filamentous or multi-arm-shaped hydrogel, is taken as a sacrificial template, after the sacrificial hydrogel is removed, a bionic blood vessel lumen form with a pore structure having better connectivity can be obtained, and cells can be loaded in the filamentous sacrificial hydrogel, so that in-situ release of cells in a three-dimensional pore network is realized, and the in-situ release of cells in the three-dimensional pore network is realized. Secondary planting is not needed, and the cell planting efficiency and uniformity are improved.

According to the medical rotary cutting tool bit assembly, the rotary cutting catheter and the visual blood vessel volume reduction system, the rotary cutting tool bit assembly is provided with a front rotary cutting tool bit and a rear rotary cutting tool bit to conduct rotary cutting operation on blocked blood vessel plaques or thrombus and the like, and the effects of opening blocked blood vessels and enlarging the diameter of a lumen are achieved; a larger blood vessel lumen diameter can be obtained under the condition that surgical instruments do not need to be replaced or repeated rotary cutting is not needed, and the surgical operation steps and time are reduced; meanwhile, by means of an imaging assembly, especially an ultrasonic transmitting and receiving device, instrument positioning in the blood vessel is carried out, a real-time and accurate ultrasonic image view is provided, and the lesion condition can be accurately evaluated; under the scene that a blood vessel guide wire or other surgical instruments cannot effectively penetrate through the occluded lesion, a lesion area can be smoothly reached, and the occluded blood vessel can be opened, so that the operation is safer and more effective.

Telescoping, self-driving, and laterally-pushing atherectomy devices are provided, each having a flexible sheath, a cutter with helical flutes, and a drive assembly. The drive assembly can have a flexible driveshaft rotatably translational with the lumen of the flexible sheath, a positive displacement pump to transport cut tissue, and a flexible drive shaft that can be longer than the flexible sheath for a reversible telescoping of the drive assembly from the lumen of the flexible sheath. The positive displacement pump can be a screw pump having a drive screw portion exposed for contact with a vascular lumen for a self-driving of the device through the vascular lumen. A reversibly-expandable, lateral pushing member can be included at the distal end of the flexible sheath for a lateral pushing of the cutter. Improved cutting heads, and methods of making them, are provided for cutting a combination of soft and hard plaque.

The present invention provides a method and device for obtaining the pressure difference of blood vessels. The method for obtaining the pressure difference of a blood vessel includes: receiving anatomical data of a part of a blood vessel segment, obtaining a geometric model of a target blood vessel according to the anatomical data; obtaining a blood flow model of the target blood vessel and the target blood vessel according to the anatomical data and combining individual data The blood flow velocity V; the geometric model is preprocessed, the cross-sectional morphological model is established, and the shape difference function f(x) of the target blood vessel lumen is calculated, based on the shape difference function f(x) of the target blood vessel lumen And the blood flow velocity V, the pressure difference value ΔP at any two positions of the target blood vessel is calculated. The method for obtaining vascular pressure difference provided by the present invention introduces the concept of morphology to clarify the influence of vascular morphology on the calculation of vascular pressure difference and improve the accuracy of calculation of vascular pressure difference.

The utility model discloses a multifunctional dressing for an interventional operation. The medical instrument aims to solve the technical problem that in the prior art, pressure injury is easily caused to the skin on the face when an oxygen inhalation tube is used for a long time. The medical instrument comprises a dressing body, the dressing body is arranged in a long strip shape, an arc-shaped groove is formed in the middle of the top end of the dressing body, a first implantation piece and a second implantation piece are arranged in the dressing body and located at the left end and the right end of the lower portion of the arc-shaped groove respectively, and auxiliary parts are arranged in the middles of the two ends of the dressing body; the medical dressing is easy and convenient to operate and high in practicability, and the dressing body made of polyurethane foam is comfortable to use due to the vertical foaming technology, good in air permeability, capable of reducing pressure and protecting, free of pain in stripping and capable of being pasted repeatedly. The first implantation piece and the second implantation piece which are made of stainless steel and are different in size are placed in the middle of the dressing body, development is carried out under X rays, and the size of a blood vessel cavity can be evaluated conveniently.

Embodiments of the present application provide a blood vessel detection system, an electronic device, a storage medium and a computer program product. The system comprises a catheter and a host. The catheter is provided with a first signal collector and a second signal collector. The first signal collector is used to collect intravascular ultrasound echo signals, and the second signal collector is used to collect blood flow source signals. The host is used to generate an intravascular ultrasound image according to the intravascular ultrasound echo signals of a blood vessel to be detected, determine blood flow information of the blood vessel to be detected according to the blood flow source signals of the blood vessel to be detected, register the intravascular ultrasound image and the blood flow information in the collection time, determine first blood flow information matched by a first intravascular ultrasound image when a blood vessel lumen reaches a maximum expansion state and second blood flow information matched by a second intravascular ultrasound image when the blood vessel lumen is in a resting state according to a registration result, and calculate a blood flow reserve characteristic value according to the determined blood flow information. In this way, comprehensive evaluation of blood vessel morphology and function can be achieved.

The invention provides a data fusion method and device for intravascular ultrasound image segmentation, equipment and a medium. The method comprises the following steps: acquiring an intravascular ultrasonic image; contour segmentation is carried out on the intravascular ultrasound image through a plurality of image segmentation modes, and a plurality of contour segmentation results are obtained; and performing data fusion on the plurality of contour segmentation results of the polar coordinate system based on Kalman filtering to obtain a final contour segmentation result of the polar coordinate system. In the mode, contour segmentation results of a plurality of vascular lumen walls and vascular membrane contours are obtained by using a plurality of image segmentation modes for an intravascular ultrasound image, and data fusion is performed on the plurality of contour segmentation results of the same type of contours based on the characteristic that Kalman filtering is used for data fusion, so that optimal estimation of contour positions is obtained. And a stable and accurate contour segmentation result can be obtained.

According to some embodiments, the technology includes devices and systems for removing occlusive material from a vascular lumen. For example, the system can include a first elongate member, a second elongate member, and a cutting element configured to cut the occlusive material at a treatment site. Rotation of the second elongate member relative to the first elongate member (or vice versa) can cause the cutting element to expand away from a longitudinal axis of the second elongate member. The system can further include an expandable positioning element configured to be delivered intravascularly to the treatment site, where the positioning element can be configured to expand into apposition with the vascular wall and position the cutting element closer to the occlusive material than prior to expansion of the positioning element.

This application discloses a restraint balloon, its preparation method, and a balloon catheter, relating to the field of medical devices. The restraint balloon includes: an expandable balloon body; and a restraint component, composed of fibrous strands and fixed to the outer surface of the balloon body, used to limit the radial deformation of the balloon body during expansion. The restraint balloon of this application can limit the radial deformation of the balloon body, effectively dispersing stress during expansion. It can be used for the clinical treatment of non-vascular lumen stenosis. Because the fibrous strand restraint component can deform synchronously with the balloon body during expansion, and can contract to a near-initial state along with the balloon body after decompression due to its own elastic recovery characteristics, it significantly reduces the difficulty of balloon retraction, improving the safety and convenience of surgical procedures. It also has the advantages of low cost, high yield, simple processing, and high manufacturing efficiency.

The invention relates to a manufacturing method of a bionic blood vessel model and the bionic blood vessel model.The manufacturing method of the bionic blood vessel model comprises the steps that a three-dimensional computer model of a blood vessel lumen is constructed according to blood vessel image data; according to a three-dimensional computer model of a blood vessel lumen, a water-soluble polyvinyl alcohol material is adopted to manufacture a water-soluble inner core through a 3D printing technology; the water-soluble inner core is subjected to operation for N times or less, wherein N is larger than or equal to 1; the outer surface of the water-soluble inner core is evenly covered with a polyvinyl alcohol solution; the water-soluble inner core covered with the polyvinyl alcohol solution is subjected to at least one time of freeze thawing treatment, so that the polyvinyl alcohol solution is solidified into polyvinyl alcohol hydrogel; after N times of operation are completed, the water-soluble inner core covered with the polyvinyl alcohol hydrogel is soaked in ultrapure water so that the water-soluble inner core can be dissolved, and therefore the bionic blood vessel model with the good shape and mechanical property is obtained.

A method and system for editing a lumen contour of a tomographic image. A method comprises: receiving image data corresponding to a plurality of tomographic images acquired by an imaging catheter scanning a blood vessel; obtaining, by a processor, an automatically-generated lumen contour of the blood vessel from a tomographic image of the blood vessel; displaying, on a display, the automatically-generated lumen contour overlaid on the tomographic image of the blood vessel; identifying a true lumen edge of the blood vessel in the tomographic image; estimating a percentage of matching between a shape of the automatically-generated lumen contour to a shape of the true lumen edge; and receiving editing operations from a user via a touchscreen interface for editing at least part of the automatically-generated lumen contour based on the estimated percentage of matching. Plural editing modes are available based on the percentage of matching meeting one or more thresholds.

The invention relates to an image processing method and device based on guiding catheter features, equipment and a medium. The method comprises the following steps: acquiring an angiography image of a target blood vessel and an IVUS image of the target blood vessel, calculating the actual physical size of each pixel of the angiography image based on a guide catheter feature image in the angiography image, acquiring a target blood vessel diameter set of the angiography image based on the actual physical size of the pixels, and determining the diameter of the target blood vessel according to the features of the target blood vessel in the IVUS image. And acquiring a blood vessel lumen diameter set of the IVUS image, and matching the target blood vessel diameter set with the blood vessel lumen diameter set to obtain a registration result of the angiography image and the IVUS image. According to the invention, the position of the IVUS image can be matched with the exact position of the IVUS image on the blood vessel route map obtained by coronary artery angiography.

Devices and methods for the treatment of chronic total occlusions are provided. One disclosed embodiment comprises a method of facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The method includes providing an intravascular device having a distal portion with a lumen extending therein; inserting the device into the vascular lumen; positioning the distal portion in the vascular wall; and directing the distal portion within the vascular wall.

Maneuverable cutters for removing both hard and soft vascular plaque are provided. The devices include telescoping, self-driving, and laterally-pushing atherectomy, each having a flexible sheath, a cutter with helical flutes, and a drive assembly. The drive assembly can have a flexible driveshaft rotatably translational with the lumen of the flexible sheath, and a flexible drive shaft that can be longer than the flexible sheath for a reversible telescoping of the drive assembly from the lumen of the flexible sheath. A screw pump having a drive screw portion exposed for contact with a vascular lumen can be included for a self-driving of the device through the vascular lumen. A reversibly-expandable, lateral pushing member can be included at the distal end of the flexible sheath for a lateral pushing of the cutter. The cutters can include improved cutting heads designed for a safe removal of both soft and hard vascular plaque.

The present invention relates to a crossing device for facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein, the crossing device comprising a shaft having a distal end and a proximal end, the shaft including a coil having a plurality of filars wound in a helical shape, the coil extending from the distal end of the shaft to the proximal end of the shaft, a sleeve having a proximal end and a distal end, the sleeve extending from the distal end of the shaft and covering a portion of the coil, a tip fixed to the distal end of the shaft, and a hub fixed to the proximal end of the shaft.

Devices and methods for the treatment of chronic total occlusions are provided. One disclosed embodiment comprises a method of facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The method includes inserting an intramural crossing device into the vascular lumen, positioning at least the distal tip of the crossing device in the vascular wall, advancing an orienting device over the crossing device such that an orienting element of the orienting device resides in the vascular wall, inserting a reentry device, and re-entering the true vascular lumen.

The present application relates to the technical field of medical instruments and particularly discloses a non-vascular lumen guide wire. The non-vascular lumen guide wire comprises a core wire, a spring tube, and an outer coating layer, wherein the spring tube sleeves the far end of the core wire; the outer coating layer coats the outer side of the core wire, and the spring tube is located between the core wire and the outer coating layer. The non-vascular lumen guide wire in the described solution incorporates a spring tube sleeving the far end of the core wire. This design, while ensuring that the far end of the guide wire has good flexibility, can enhance the elasticity of the far end of the guide wire, thereby ensuring the elastic recovery ability of the far end of the guide wire. The spring tube can function to constrain and correct the far end of the core wire, so that the far end of the guide wire will not easily kink after being bent. The guide wire can better adapt to the shape and curvature of a non-vascular lumen, reducing damage and friction to the surrounding tissue caused by the guide wire, thereby ensuring smooth insertion of the core wire into the non-vascular lumen.

The utility model discloses a tissue separation pad beneficial to microvascular anastomosis, which comprises a pad, an air cushion is arranged on the inner wall of the pad, a support is arranged in the air cushion, two suture pads are arranged above the pad, and the two suture pads can be attached to each other. The utility model relates to the technical field of vascular anastomosis, in particular to a tissue separation pad beneficial to microvascular anastomosis, which can play a role in physically separating tissues around a blood vessel from a lumen of the blood vessel through the matching of a gasket, an air cushion, a winding rope, a titanium alloy layer and a bracket, and provides a relatively pure anastomosis environment. In the process, some easily-coagulated substances, fat particles, vascular adventitia and other tissues are effectively prevented from entering a vascular lumen in the anastomosis process, vascular embolism is prevented, and the tissue separation pad beneficial to microvascular anastomosis can be expanded outwards all the time by means of the elasticity of the support, so that the tissue separation pad is more stable. And the phenomenon of vascular occlusion caused by extrusion of the tissue separation pad beneficial to microvascular anastomosis is avoided.

The present invention relates to a multifunctional multi-lumen balloon catheter, comprising an intravascular auxiliary guide head, a balloon connection catheter body and a terminal operating component; the intravascular auxiliary guide head comprises a front end conical soft head and an L-shaped balloon, the front end conical soft head has a hollow inner cavity, and the end of the front end conical soft head has an opening; the balloon connection catheter body comprises an outer sheath of an outer wall and an internal hose, and the hose has a balloon water injection catheter and a guide wire tube passing through; the internal hose of the balloon connection catheter body is connected to the front end conical soft head, and the guide wire tube in the hose passes through the hollow inner cavity of the front end conical soft head to the end opening of the front end conical soft head; one end of the L-shaped balloon is connected to the balloon water injection catheter in the hose, and the other end is a closed structure, and the L-shaped balloon at the front end of the outer sheath is connected to the hose through a membrane structure. The multifunctional multi-lumen balloon catheter of the present invention can help doctors handle difficult and complex operations in specific scenarios, thereby improving the success rate of surgery and reducing surgery time.

Devices and methods for the treatment of chronic total occlusions are provided. One disclosed embodiment comprises a method of facilitating treatment via a vascular wall defining a vascular lumen containing an occlusion therein. The method includes providing an intravascular device having a distal portion with a side port, inserting the device into the vascular lumen, positioning the distal portion in the vascular wall, directing the distal portion within the vascular wall such that the distal portion moves at least partially laterally, and directing the side port towards the vascular lumen.

The invention discloses a blood vessel lumen diameter calibration method and device, equipment, a medium and a product, and the method comprises the steps: obtaining first-type blood vessel image data and second-type blood vessel image data of a first object, and the registration relation between the first-type blood vessel image data and the second-type blood vessel image data; according to the registration relationship, determining a diameter mapping relationship between the first type of blood vessel image data and the second type of blood vessel image data based on a first blood vessel diameter of the first type of blood vessel image frame and a second blood vessel diameter of the second type of blood vessel image frame; according to a diameter mapping relation, adjusting a blood vessel diameter corresponding to a blood vessel image frame in the first type of blood vessel image data to obtain a target intracavity blood vessel diameter; and mapping the target intracavity blood vessel diameter to the blood vessel diameter of the corresponding second type blood vessel image frame in the second type blood vessel image data. According to the technical scheme provided by the embodiment of the invention, the external image of the blood vessel can be calibrated by utilizing high precision of the intracavity image.

The invention provides a control method for reducing needle leakage and liquid leakage of an indwelling needle and an indwelling needle infusion monitoring system.The control method comprises the following steps that the maximum tolerance pressure of a blood vessel punctured by the indwelling needle is obtained according to the age and blood pressure of a patient punctured by the indwelling needle and the fullness and size of the punctured blood vessel; according to the maximum tolerance pressure of the blood vessel, the maximum flow speed of the conveyed medicine is obtained; according to the maximum flow speed of the medicine, the actual flow speed of conveyed medicine is adjusted. For a patient subjected to emergency rescue, the maximum tolerance pressure of the blood vessel punctured by the indwelling needle is obtained, then the maximum flow speed of the conveyed medicine is obtained according to the maximum tolerance pressure of the blood vessel, and then the actual flow speed of the conveyed medicine is adjusted according to the maximum flow speed of the medicine. According to the change of the fullness degree of the blood vessel lumen, the actual flow speed of the conveyed medicine is adjusted, and the probability of needle leakage and liquid leakage of the remaining needle is reduced.

The present invention provides a vascular image processing and analysis method and system for combined magnetic resonance vascular and vascular wall imaging, the system comprising: a data acquisition module for acquiring vascular enhanced images and vascular wall images; an image registration module for registering the vascular wall image to the vascular enhanced image to obtain the registered vascular wall image; a segmentation module for obtaining the vascular lumen segmentation result and the vascular wall segmentation result; a fusion module for weighted fusion of the vascular enhanced image and the registered vascular wall image to obtain a fused image; an analysis module for calculating the intersection area of the vascular lumen segmentation result and the vascular wall segmentation result; a three-dimensional visualization and surface reconstruction module for performing three-dimensional skeleton extraction and surface reconstruction on the three-dimensional connected domain of the suspected occluded blood vessel. The present invention can simultaneously obtain information on the vascular lumen and the vascular wall, making up for the deficiencies of traditional imaging methods in evaluating the distal vascular wall conditions of occluded blood vessels, and significantly shortening the time required for preoperative evaluation through automated processing and analysis.