21 results about "Venous vessel" patented technology

The present application belongs to the technical field of medical devices, and discloses a stripper, which comprises a pipe body, a flow channel formed between a first end and a pipe outlet, a plurality of mutually isolated cavities separated by the flow channel, each cavity being provided with a medicine inlet hole and a medicine outlet hole, a plurality of medicine inlet joints arranged in sequence at the first end and connected in one-to-one correspondence with the medicine inlet holes, and a sealing head detachably connected to the second end. The first end of the pipe body is closed, the second end is open, the interior of the pipe body is provided with a plurality of mutually isolated cavities, each cavity is provided with an independent medicine outlet hole, and anesthetic can be input into the interior of the pipe body through the medicine inlet hole connected with the medicine inlet joint. After the anesthetic flows out of the pipe outlet, the pipe outlet is blocked by the sealing head. At this time, when the anesthetic continues to be input into the medicine inlet hole, the anesthetic can only flow out of the medicine outlet hole. During the stripping operation, the anesthetic can perform multi-region anesthesia in the intravenous blood vessels, and the stripping and anesthesia can be performed simultaneously.

This disclosure provides a measurement system and method for the pathological features of hypertensive retinopathy. The measurement system includes: an acquisition module that acquires fundus images; a partitioning module that receives the fundus images and identifies and partitions the optic disc region; a segmentation module that uses an arteriovenous segmentation model to segment the fundus images into arteries and veins to obtain a three-valued image of the segmentation results. The arteriovenous vessel marking results include arterial and venous marking results formed by marking the boundaries of vessels with diameters larger than a preset vessel diameter in the training fundus images, and small vessel marking results formed by marking the course of vessels with diameters not larger than the preset vessel diameter. The measurement module measures the pathological features of hypertensive retinopathy in the fundus images based on the vessels larger than the preset vessel diameter in the partitioning and segmentation results. This disclosure enables efficient and objective measurement of the characteristics of hypertensive retinopathy.

The utility model discloses a kind of venous hot compress sleeve, including the rectangular block of the sleeve main body made of skin-friendly material, sleeve main body is equipped with heating area, the left side of sleeve main body is equipped with first connecting belt, the right side of sleeve main body is equipped with second connecting belt, corresponding position of first connecting belt and second connecting belt is equipped with detachable connecting piece respectively, the position of first connecting belt close to sleeve main body is equipped with infusion leather strip connecting piece, the position of second connecting belt close to sleeve main body is equipped with elastic tightness area.The utility model can realize temperature controllable and heat preservation to a certain extent, improve hot compress operation convenience and security, not only can help patient expand venous vessel, promote drug absorption, also can relieve pain caused by vasospasm, reduce swelling or induration.

This invention relates to the field of medical device technology, and in particular discloses a medical puncture and catheter placement training manikin, comprising a torso with two arms fixed to both sides. A power supply is fixed inside the torso. Each arm includes a support frame covered with a biomimetic rubber sheath, and at least one fixed vein is fixed to the inner wall of the support frame. The advantages are: multiple combinations can be selected to simulate problems encountered during and after PICC placement; the situation encountered by the operator in each training session can differ from the previous one; and the use of an ultrasound detector and display screen allows instructors to monitor the catheter's position and the operator's specific actions during placement in real time. This facilitates simulated practice and assessment of PICC placement techniques for medical personnel, allowing for evaluation of their mastery of PICC placement techniques and improving their proficiency.

This invention provides a method and system for displaying veins based on image processing, belonging to the field of image processing. The method includes acquiring a near-infrared vein image to be processed, calculating the structure tensor, selecting the minimum eigenvalue map as a guide image, and calculating the pixel value variance. The original image is decomposed into an initial illumination component and an initial reflection component through guided filtering. The order of a two-dimensional least-squares surface fitting is determined based on the pixel value variance, and the initial illumination component is processed using the fitting to generate a background illumination model. A first vessel response map of the initial reflection component is obtained by calculating the Hessian matrix at multiple scales, and a second vessel response map is obtained by calculating local phase consistency. The two are fused to obtain an enhanced reflection component. A correction matrix is ​​generated by combining the background illumination model and gradient magnitude to correct the enhanced reflection component. The corrected reflection component is multiplied by the background illumination model to reconstruct the vein display image. The display image obtained by this invention is more in line with the needs of practical operation.

A pharmaceutical composition comprising azilsartan medoxomil potassium and a calcium channel blocker, a method for preparing same, and use thereof are provided. Azilsartan medoxomil potassium and the calcium channel blocker are formulated into a compound formulation, thus improving the blood pressure lowering efficacy, improving safety and tolerability, and reducing adverse effects. Azilsartan medoxomil potassium can ameliorate peripheral edema caused by amlodipine by means of expanding peripheral venous vessels, while amlodipine can ameliorate adverse effects such as vasogenic edema, dry cough, and the like caused by azilsartan medoxomil potassium.

This invention discloses a portable hemodialysis accessory with a blood leakage sensor, relating to the field of hemodialysis monitoring technology. The invention includes a housing, with a venous vessel fixation seat and an arterial vessel fixation seat connected to its two sides respectively. Each of the venous and arterial vessel fixation seats has a vessel slot on one side. A monitoring system connected to the leakage sensor is disposed within the housing, and a control panel and an audible and visual alarm are disposed on the outside of the housing and connected to the monitoring system. This invention, through the monitoring system within the housing, can receive the detection signal transmitted by the leakage sensor in real time. When blood leaks into the vessel slot and comes into contact with the leakage sensor, the monitoring system quickly analyzes and processes the signal, immediately triggering an alarm light on the control panel and activating the audible and visual alarm. This dual audio and visual alert allows medical personnel to detect the abnormality immediately.

The application discloses a vein imaging device and a control method thereof. The vein imaging device comprises a near-infrared light source module, a first polarizer, an image sensor, a second polarizer, an inertial measurement unit, a processing unit and a projection module, wherein the polarizing directions of the first and second polarizers are orthogonal. The processing unit calculates a predicted displacement according to motion posture data of the inertial measurement unit and system delay, and performs a reverse geometric transformation on the extracted vein vessel features to generate a compensated projection image for the projection module to project. The application filters out surface noise through orthogonal polarized optical design, improves the imaging signal-to-noise ratio, and solves the projection misalignment problem caused by device movement and system delay through active motion compensation based on posture prediction, realizing clear, stable and real-time alignment of the vessel projection.

Systems and methods are provided for removal of clot material from a treatment site in a blood vessel, particularly in venous vasculature. A treatment device can include a core member having a distal portion and an inner coil surrounding the distal portion of the core member. A helical outer member surrounds at least a portion of the inner coil, and a sheet of flexible material extends between the inner coil and the helical outer member, such that the sheet extends helically around the inner coil to provide a surface for clot engagement at the treatment site.

This application provides an image processing method, apparatus, storage medium, and electronic device, relating to the field of fundus image processing technology. The image processing method provided in this application includes: determining each fundus blood vessel contained in a target fundus image; determining pre-intersection points of each fundus blood vessel; removing two-dimensional intersection points of arteries and veins from the pre-intersection points to obtain fundus blood vessel intersection points; for each fundus blood vessel intersection point, determining the vessel angle corresponding to the intersection point based on the intersection point and the corresponding fundus blood vessel; and determining the vessel angle of the target fundus image based on the vessel angles corresponding to each fundus blood vessel intersection point contained in the target fundus image. The image processing method provided in this application can automatically calculate the vessel angle of a target fundus image, and the calculation results are objective, improving the accuracy and efficiency of the vessel angle calculation results.

The application discloses a combined evaluation method for the in-vitro and in-vivo redness-reducing soothing effect of a cosmetic raw material, which comprises in-vitro model evaluation, adoption of a human immortalized umbilical vein endothelial cell model induced by TNF-alpha, acquisition of the in-vitro model score by detecting the secretion amount of prostacyclin I2 factor, in-vivo model evaluation, adoption of a chicken embryo chorioallantoic membrane model, acquisition of the in-vivo model score by the degree of blood vessel contraction caused by the action of the sample to be tested on the chicken embryo chorioallantoic membrane, and comprehensive evaluation of the redness-reducing soothing effect of the sample to be tested based on the in-vitro model score and the in-vivo model score. The technical scheme of the application makes up for the defect of the prior art that there is no cosmetic raw material soothing effect evaluation method for the mechanism of increased vascular reactivity, the effect evaluation is more accurate, and the method has the advantages of comprehensiveness, short test cycle, simple operation, economy and convenience, and provides an effective reference for the screening and compounding scheme of redness-reducing soothing raw materials.

This invention belongs to the field of vascular recognition technology, specifically relating to a method and system for retinal arteriovenous vessel recognition based on image recognition. The invention includes determining the structural features of a vascular path, including at least one of branch points and bending structures. In response to the determination of these structural features, the vascular path is classified into main vessels or branch vessels based on preset classification rules utilizing these features. This invention divides vascular nodes into a set of main control vascular points and a set of secondary control vascular points. Branch points are determined by calculating the offset of adjacent nodes of the main control vascular points, and bending structures are determined by calculating the introduced force based on the distribution of the secondary control vascular point set. This utilizes the different characteristics of the main control vascular point set and the secondary control vascular point set to differentiate between these two key topological structures—branch points and bending structures—avoiding the misjudgment of structures caused by treating all vascular nodes equally, thus improving the accuracy of structural feature recognition.

The present application provides a venous valve prosthesis, comprising a stent body and a valve; the stent body has an inner cavity, and the stent body comprises a proximal positioning part, a supporting part and a distal positioning part; the valve is connected to at least the supporting part and divides the inner cavity into a first segment and a second segment arranged from the proximal end to the distal end; the valve has a first position and a second position; the venous valve prosthesis is used for implanting into a target lumen for the target liquid to flow through; when the valve is subjected to a pressure from the target liquid pointing from the distal end to the proximal end, the valve is in the first position, so as to make the first segment and the second segment communicate to allow the target liquid to flow from the second segment into the first segment; when the valve is subjected to a pressure from the target liquid pointing from the proximal end to the second segment, the valve is in the second position, so as to make the first segment and the second segment isolated to prevent the target liquid from flowing from the first segment into the second segment. The venous valve prosthesis can be implanted into a venous vessel and replace a diseased venous valve, thereby preventing blood reflux.

The application discloses a self-adaptable and fixable coagulation monitoring flexible pressure sensor and a preparation method thereof. The pressure-sensitive layer of the flexible pressure sensor is a nanofiber membrane with hundred-microstructure prepared by an electrospinning process. The nanofiber membrane is prepared by mixing polylactic acid with shape memory as a base material and multi-walled carbon nanotubes as a conductive substance. The preparation method of the flexible pressure sensor is simple, and the flexible pressure sensor has high sensitivity under small load. The pressure-sensitive layer of the sensor has an initial shape and a temporary shape, and can be transformed between the initial shape and the temporary shape under external stimulation driving. The installation and fixation of the flexible pressure sensor are realized by controlling the deformation process of the sensor. The nanofiber membrane is spontaneously deformed and inwards shrunk to be attached on a central venous catheter, so that the fixation is realized. The stability of the flexible pressure sensor is improved, the flexible pressure sensor is adaptively installed at the front end of the central venous catheter, and the blood flow pressure in the venous blood vessel can be monitored in real time.

The present application relates to artificial intelligence and digital medical treatment, and provides an arteriovenous vessel separation method and device based on images, an electronic device and a medium, which extracts a blood vessel skeleton in a CT image; divides the blood vessel into a plurality of blood vessel segments according to the blood vessel skeleton; constructs a blood vessel topology graph based on the plurality of blood vessel segments; extracts a plurality of features of each blood vessel segment; trains an arteriovenous vessel separation model based on the blood vessel topology graph and the plurality of features of each blood vessel segment; and inputs a CT image to be processed into the trained arteriovenous vessel separation model to separate arteriovenous vessels. The present application can improve the accuracy of arteriovenous vessel separation.

This invention discloses a systemic circulation venous simulation system, comprising a right ventricular simulation component, an arterial compliance simulation component, a venous vessel module, a damping module, a throttling valve, a collapsible venous segment, a venous compliance simulation component, a right atrial simulation component, a drive module, and a data acquisition module. The right ventricular simulation component simulates the pumping function of the right ventricle; the arterial compliance simulation component simulates the elastic energy storage characteristics of the arterial system; the venous vessel module includes a collecting chamber, a superior vena cava return vessel, an inferior vena cava return vessel, and a vena cava confluence conduit; the collapsible venous segment prevents excessive negative pressure in the venous system; the venous compliance simulation component reduces the impact of right atrial pressure fluctuations on the venous vessels; and the right atrial simulation component simulates the right atrial filling state through internal volume changes. This simulation system can be used for in vitro testing of vena cava intervention devices.

This utility model provides a surgical delivery device for varicose vein closure surgery, belonging to the field of medical device technology. It includes: a main body shell, a push rod, a conduit, a positioning block, and a pressure block. The head opening of the main body shell is provided with a slot for mounting a syringe. The push rod pushes the piston rod of the syringe via a drive assembly. The conduit is provided with a guide groove for limiting the piston rod of the syringe. The push rod passes through a positioning hole on the positioning block and extends into the guide groove to contact the piston rod. The pressure block clamps the push rod. The syringe is fixed by the slot. When the drive assembly drives the push rod to push the piston rod, adhesive delivery is achieved. The precise cooperation of the positioning block, conduit, and slot improves the stability of the push rod and syringe cooperation, enhancing the continuity of the delivery device. The surgical delivery device for varicose vein closure surgery provided in this embodiment solves the problem of poor cooperation stability between the push rod and syringe in existing adhesive delivery devices.

Sclerosing agent for use in treating a varicose, reticular or spider vein, wherein the sclerosing agent is administered in a formulation further comprising a water-soluble cellulose derivative, pharmaceutical composition comprising a sclerosing agent and a water-soluble cellulose derivative as well as a kit or a method for producing a foam comprising a sclerosing agent and a water-soluble cellulose derivative.

The utility model relates to hemodialysis technical field especially, it is a kind of pipeline connecting device of immediate wear type artificial blood vessel, including subcutaneous tissue layer, the skin layer of being in the upper layer of subcutaneous tissue layer, the venous blood vessel and arterial blood vessel being arranged between subcutaneous tissue layer and skin layer and the artificial blood vessel being established between venous blood vessel and arterial blood vessel. In the utility model, the original artificial blood vessel structure is improved scientifically and rationally, venous transfusion port, arterial transfusion port, oval puncture bevel and rubber septum are arranged on artificial blood vessel, artificial blood vessel can be embedded between subcutaneous tissue layer and skin layer, and skin puncture hill, which is convenient for puncture needle to puncture and position, can be formed on skin layer, effectively reduce the risk problems such as surgical trauma, puncture risk, catheter infection, central vein stenosis and even occlusion of hemodialysis process of hemodialysis patient, thereby improve the security and stability of actual hemodialysis use.

An apparatus (10) includes at least one electronic processor (20) programmed to: receive one or more images (35) of a vascular system including arteriovenous vesicles; extract at least one image feature from the one or more images; predict a value of a grading criterion based on the extracted at least one image feature; and determine the grade (40) of the arteriovenous vesicles based on the predicted value of the grading criterion.