152 results about "Venous vessel" patented technology

The invention discloses an embolism part for peripheral arteriovenous vessels, the embolism part comprises an anchoring part and a blocking part fixedly connected with the anchoring part, the blocking part adopts polyurethane shape memory foam, the expansion rate of the polyurethane shape memory foam is 50-100 times, and a preparation method of the polyurethane shape memory foam comprises the following steps: step 1, preparing a polyurethane shape memory foam material; the preparation method comprises the following steps: preparing a polyurethane acrylate prepolymer from macromolecular polyol, diisocyanate, a chain extender containing disulfide bonds, other micromolecular chain extenders and an acrylate end-capping reagent; and 2, uniformly mixing the polyurethane acrylate prepolymer, a foaming agent, a foaming promoter and a photoinitiator to obtain a foaming solution, and sequentially carrying out light curing and foaming on the foaming solution to obtain the polyurethane shape memory foam. According to the embolism part, the polyurethane shape memory foam is adopted as the blocking part, the blocking part applies radial acting force to the wall of the blood vessel all the time based on the expansion trend of the blocking part, and the blocking part and the anchoring part jointly act and can be stably maintained in the blood vessel.

An intra-vessel transcatheter filter device (1) designed to capture and remove emboli, thus preventing distal embolization, comprising: • a tubular filter (2) comprising a flexible porous material and defined by a distal element and a proximal element, namely a main body (3) and a funnel (4); i. said main body (3) having a length adapted to extend within a suitable vessel zone; said main body (3) comprising: a) a distal end (5) that is adapted to be radially coupled with said zone and hermetically sealed to it when the device is in an active configuration, said distal end (5) being provided of selectively actionable closure means so that said distal end is designed to be open when the device is in an active configuration and closed before the device retraction, b) a proximal end (6); ii. said funnel (4) forming an extension of said main body (3), with the funnel base located at said proximal end (6). • a support structure assembly (8) comprising: i. a supporting catheter (11) extending within said main body (3), ii. one radially expandable distal structure (9) fixed to said distal end (5), iii. one radially expandable proximal structure (10) positioned in correspondence of said proximal end (6), said distal structure (9) and said proximal structure (10) being fixed at least in an end to said supporting catheter (11).

The invention relates to the technical field of medical image processing and medical aid decision making, in particular to an internal arteriovenous fistula intelligent planning method and system based on haemodynamic simulation, and the method comprises the steps: firstly obtaining three-dimensional space anatomical data of arteriovenous blood vessels of a patient, and constructing a blood vessel tree three-dimensional model; and inputting the blood vessel parameter data and the hemodynamic parameter data at different blood flow rates into a deep learning model to obtain dynamic shear force data of the anastomotic stoma, and comparing the dynamic shear force data of the anastomotic stoma with preset optimal anastomotic angle data to determine an optimal anastomotic angle. And performing internal arteriovenous fistula operation type three-dimensional modeling on the three-dimensional model of the vascular tree by combining the optimal anastomosis angle to obtain a three-dimensional internal arteriovenous fistula model, and performing a virtual operation based on the model to obtain virtual operation process data and a postoperative hemodynamic state evaluation result. The success rate of one-time operation of internal fistula can be increased to 85%-90% from 60%-65% in the prior art.

The invention discloses a blood brain barrier water extraction rate imaging method and system based on artery marking and speed selection. By marking spinning of water molecules in artery blood and selectively detecting signals of residual marked blood which does not enter brain tissues in vein blood vessels, quantitative evaluation of blood-brain barrier water permeability is realized. According to the method, the neck artery blood flow is magnetized and overturned by adopting pseudo-continuous artery spin labeling, a speed selection module based on Fourier transform is applied in an acquisition stage to eliminate interference of brain tissue signals, pure vein labeling signals are obtained, and rapid and accurate measurement of water extraction fraction and permeability-surface area volume is realized. In addition, the signal-to-noise ratio and robustness are effectively improved by adopting dual suppression pulses of background tissues and blood. The method does not need an exogenous contrast agent, is non-invasive, short in scanning time and accurate and stable in measurement result, and has important clinical application value for early diagnosis of brain diseases and assessment of pathological changes of the blood brain barrier.

The invention relates to a computer-implemented method of liver resection surgery planning, comprising the steps of: processing (E2) preoperative computed tomographic images (10) of a patient to generate liver, liver lesion (ss) and venous vessels segmentations; pruning the venous vessels segmentation to retain only major vessels and determining (E3) a primary hepatic zone (PHZ) from the retained major vessels; determining (E4) at least one quantitative feature from the primary hepatic zone, the liver segmentation and the liver lesion(s) segmentation; processing (E5) the determined quantitative features with a classification model to determine a liver resection complexity score for the patient.

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 (101) can include a core member (115) having a distal portion (109) and an inner coil (111) surrounding the distal portion of the core member. A helical outer member (113) surrounds at least a portion of the inner coil, and a sheet of flexible material (117) 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.

The invention discloses a highly convenient and safe palm lock, which comprises a lock body, a palm print acquisition module, a palm vein acquisition module, an iris recognition module, a control unit and a mechanical execution unit, and is characterized in that the palm print acquisition module is used for acquiring palm surface texture features and comprises an optical imaging unit and an infrared light supplement lamp; the palm vein acquisition module is used for acquiring vein blood vessel distribution characteristics in a palm and comprises a near-infrared light source and an infrared sensor; the iris recognition module is used for obtaining human eye iris texture features. Therefore, single-feature quick unlocking (convenience) and multi-feature combined verification (high safety) are supported, a user can dynamically configure a verification mode through a mobile phone APP to adapt to different scene requirements (such as household daily palmprint and office palmprint + iris), the three biological features are independently collected, the forging difficulty is high, the combined verification safety is high, and the verification efficiency is high. The palm fitting area is designed to be arc-shaped and aligned with the camera, and the identification time is less than or equal to 2 seconds.

The invention provides a limb thrombus monitoring device and method based on arteriovenous recognition, and the device comprises a monitoring management middle platform, a multi-modal data collection module, a vein recognition module, a feature extraction module, and a risk assessment module. The monitoring management middle platform is connected with the multi-modal data acquisition module, the vein recognition module, the feature extraction module and the risk assessment module, and manages each unit; the multi-modal data acquisition module is used for acquiring image data of limb parts of a patient; and the vein recognition module is used for recognizing and positioning the limb vein position of the patient based on the near-infrared imaging data to obtain vein position information. The accuracy of thrombus monitoring, evaluation and judgment can be improved, and the problem that the thrombus monitoring process mainly depends on clinical experience of medical staff for judgment is avoided. Therefore, the thrombus monitoring and judging efficiency and accuracy are improved.

The invention discloses a vein blood vessel image processing method and device, equipment and a storage medium. The vein blood vessel image processing method comprises the steps of collecting a vein blood vessel image; the collected vein blood vessel image is preprocessed; an improved U-Net segmentation network and an improved Zhang-Suen skeletonization algorithm are adopted to process the preprocessed image, and multi-modal results are fused to obtain a blood vessel segmentation result; and based on a blood vessel segmentation result, performing blood vessel three-dimensional modeling by adopting a multi-stage B-spline mapping method, and quantitatively analyzing blood vessel spatial geometric features and hemodynamic parameters to obtain a blood vessel form-function joint evaluation index. The vein blood vessel image is processed and analyzed, three-dimensional modeling is carried out on the blood vessel, the radiation path of radiotherapy is planned, and a foundation is laid for follow-up treatment of varicosity through in-vitro radiation.

The invention discloses an extravascular stent, and relates to the technical field of medical instruments. The extravascular stent comprises a first sleeve joint piece, a second sleeve joint piece and a third sleeve joint piece, the first sleeving piece is suitable for being arranged on the periphery of a vein in a sleeving mode, a plurality of deformation grooves are formed in the first sleeving piece, the area between every two adjacent deformation grooves is hollowed out, and the deformation grooves are used for enabling the first sleeving piece to adapt to the diameter change of the vein; the second sleeving piece is connected with one side of the second end of the first sleeving piece, and the second sleeving piece is suitable for being connected to the periphery of the artery blood vessel on the upstream side in a sleeving mode; the third sleeving piece is connected with the other side of the second end of the first sleeving piece, and the third sleeving piece is suitable for being connected to the periphery of the artery blood vessel on the downstream side in a sleeving mode. According to the extravascular stent provided by the invention, the structural design is improved, the mounting convenience of the extravascular stent is improved, the operation time is shortened, the adaptability of the extravascular stent to the diameter change of a vein is improved, the material cost is saved, and the treatment cost is reduced.

The utility model relates to the technical field of medical instruments, in particular to a pacemaker electrode wire, which comprises a wire conduit, the wire conduit comprises a head part and a tail part which are connected with each other, the head part is provided with an electrode assembly, and the electrode assembly comprises a first electrode and a second electrode which are electrically connected with each other. The first electrode and the second electrode are arranged in a spaced mode in the direction from the head to the tail, and a fixing piece located between the first electrode and the second electrode is arranged on the outer side of the wire conduit. The head of the wire conduit can be sent to the right ventricular apex of the heart of a patient through vein puncture, and the fixing piece is in contact with and fixed to the surface of the endocardium, so that the first electrode is firmly fixed to the right ventricular apex, the electrode wire is kept stable in the heart of the patient, and the electrode wire is prevented from shifting or falling off; and the normal cardiac function of the patient is ensured.

The utility model discloses a medical transfer flatcar which comprises a supporting plate, fixing boxes are fixedly installed on the left side and the right side of the surface of the supporting plate, four movable rods are evenly distributed above the fixing boxes, and the lower ends of the movable rods are rotationally connected with the fixing boxes through damping shaft seats. The upper ends of the four movable rods are rotationally provided with the same transverse frame through damping rotating shafts, a plurality of clamps are fixedly installed on the outer side of the transverse frame, a collecting groove is formed in the upper surface of the transverse frame, a supporting rod is rotationally installed on the inner surface of one end of the collecting groove through a damping shaft, and a hanging mechanism is arranged on the outer side of the top end of the supporting rod. When infusion is carried out in the process of transporting a patient, the hanging stability of a medicine bottle can be ensured, the situation that the medicine bottle shakes and falls off is avoided, meanwhile, the situation that an infusion tube shakes in the moving process, consequently, the whole tube body shakes synchronously can be avoided, and the phenomenon that a needle deviates in the vein of the patient along with shaking of the infusion tube is avoided.

The embodiment of the invention provides a fundus artery and vein segmentation method and device, electronic equipment and a storage medium, and belongs to the technical field of image processing. The method comprises the following steps: acquiring a fundus blood vessel topological structure labeling sample set, and acquiring a fundus artery and vein labeling sample set; acquiring an arteriovenous segmentation loss function; based on the fundus blood vessel topological structure labeling sample set, performing model training to obtain a target fundus blood vessel topological structure classification model; based on the target fundus blood vessel topological structure classification model, performing function adjustment on the arteriovenous segmentation loss function to obtain an initial total loss function; based on the fundus artery and vein labeling sample set and the initial total loss function, performing model construction to obtain a target fundus artery and vein blood vessel segmentation model; and based on the target fundus artery and vein segmentation model, performing artery and vein segmentation on preset fundus artery and vein image data to obtain a fundus artery and vein segmentation image. According to the embodiment of the invention, the accuracy of fundus artery and vein segmentation can be improved.

The application discloses an arteriovenous fistula system, and relates to the technical field of medical devices, which comprises a fistula catheter, a handle, a power transmission line and a power output controller. The application makes the operation of the fistula catheter head more convenient, realizes accurate detection of the relative displacement amount of the head electrode, makes the fistula catheter head not loosen even if the external force disappears after being closed, improves the structure of the heating electrode, and makes the size and angle of the fistula not adversely affect the blood flow. The application adds blood flow, blood pressure, temperature and other sensors in the fistula catheter, cooperates with the control function of the power output controller, realizes accurate detection of the opening and closing state of the fistula catheter head, automatic detection of the arteriovenous vessel wall capture, safe output of energy and heating control of the fistula catheter head electrode. The application is more beneficial to the operation of doctors in clinical use and can obtain better fistula effect.

The application discloses an arteriovenous fistula blood vessel lining support and a use method thereof, and the arteriovenous fistula blood vessel lining support has a three-way pipe structure; the axes of two passages in the three-way pipe structure are on a straight line to form a straight pipe, and the axis of the other passage has a variable included angle with the straight line formed by the axes of the first two passages to form a bifurcated pipe; the straight pipe and the bifurcated pipe jointly form a three-way shape of the support with an inner cavity and have optional additional structures near each port; the straight pipe is used for being implanted into an arterial blood vessel; and the bifurcated pipe is used for sleeving a venous blood vessel which needs to be connected. After the arteriovenous fistula blood vessel lining support is embedded, the occurrence of turbulent flow is effectively reduced, blood composition deposition is reduced, the probability of vascular hyperplasia and vascular stenosis is reduced, the arteriovenous fistula maturation time is shortened, and the use time of the fistula is prolonged.

The utility model belongs to the technical field of medical instruments, and particularly relates to a bloodletting device. In the bloodletting device, one end of a drainage tube is connected with a puncture needle through a three-way connector, the other end of the drainage tube is communicated with a drainage bag, and a peristaltic pump is sleeved with the middle of the drainage tube; the puncture needle is punctured into a vein of a patient, the pump head of the peristaltic pump is used for extruding the drainage tube to generate negative pressure in the drainage tube, blood is pumped out of the vein at a constant speed, the stable bloodletting effect is achieved, it is guaranteed that one-time bloodletting amount is sufficient, and the ideal treatment effect is achieved.

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 application relates to a method and related apparatus for vascular imaging of an artificial artery and vein arm. The method includes the following steps: acquiring superficial near-infrared images and deep near-infrared images; layering the deep near-infrared images based on the superficial near-infrared images to obtain venous and arterial image information; acquiring pulsed Doppler ultrasound images and obtaining the relative positional relationship between the venous and arterial vessels based on the pulsed Doppler ultrasound images; calculating theoretical arterial image information based on the relative positional relationship from the venous image information; matching the theoretical arterial image and the arterial image, and completing the arterial image based on the matching result. This application has the advantage of improving the imaging effect of vascular imaging instruments.

The disclosure provides, in various embodiments, systems, devices and methods relating to ex-vivo organ care. In certain embodiments, the disclosure relates to maintaining an organ ex-vivo at near-physiologic conditions. The present application describes, for example, a method for using lactate measurement in the arterial and the venous blood lines of the Organ Care System Heart perfusion device to evaluate, for example, the: 1) overall perfusion status of an isolated heart; 2) metabolic status of an isolated heart; and 3) overall vascular patency of an isolated donor heart. This aspect of the present disclosure may use, for example, the property of myocardial cell's unique ability to produce / generate lactate when they are starved for oxygen and metabolize / utilize lactate for energy production when they are well perfused with oxygen.

The utility model relates to the field of medical supplies, and discloses an anti-backflow blood taking needle which comprises a vein blood taking end, a blood taking tube puncture end and a hose for connecting the vein blood taking end and the blood taking tube puncture end, a non-return piece is arranged at the joint of the blood taking tube puncture end and the hose, a silica gel sheet or a silica gel plug is arranged in the non-return piece, and the silica gel sheet or the silica gel plug is connected with the hose. The blood collection tube is used for limiting blood to flow only in the direction from the vein blood collection end to the blood collection tube puncture end. According to the anti-backflow blood taking needle, the non-return piece is arranged between the puncture end of the blood taking tube and the hose to automatically open or close the flow channel, so that blood is effectively prevented from flowing back into the vein of the human body from the blood taking tube in the vein blood taking process, the safety of a person with blood taken is guaranteed, the structure is simple, and the cost is low.

The utility model relates to the technical field of practice teaching molds, and discloses a compression hemostasis teaching aid for adolescent emergency training, which is provided with a liquid bag, a simulated artery blood vessel, a simulated vein blood vessel, a simulated capillary and a micro pump, the liquid bag is used for storing simulated blood; the simulated artery blood vessel, the simulated vein blood vessel and the simulated capillary blood vessel are all of transparent structures and are respectively connected with the liquid bag, and the simulated artery blood vessel, the simulated vein blood vessel and the simulated capillary blood vessel are respectively connected with valves for controlling the on / off state of a pipeline; the micro pump is used for outputting pumping pressure to the liquid bag, and the pumping pressure of the micro pump is adjustable corresponding to the set flow velocity of the simulated artery blood vessel, the simulated vein blood vessel and the simulated capillary blood vessel. The first-aid training device can simulate different blood vessels of a human body and press the corresponding blood vessels to force blood flow in the corresponding blood vessels to be stopped, so that teenagers can practice operation in training, and the teaching effect of first-aid training of the teenagers is effectively improved.

The present invention relates to an equal-dose opposed-vessel monitoring pulmonary artery-pulmonary vein CT angiography method and system. For the method, the dose of the contrast agent bolus test, the flow rate and volume of the contrast agent, and the flow rate and volume of the normal saline are all consistent with those in the formal scan; during the bolus test, it is confirmed that a small amount of contrast agent flows into the pulmonary vein of the monitored slice while the pulmonary artery is filled, so as to obtain the optimal delay time of pulmonary artery CTA; it is confirmed that almost all of the contrast agent in the monitored slice has flowed through the pulmonary artery, and there is a trace amount of contrast agent at the end of the pulmonary artery near the periphery, so as to obtain the optimal delay time of pulmonary vein CTV. The system includes each module for realizing the above functions. The present invention can achieve accurate timing of pulmonary artery CTA and pulmonary vein left atrial CTV scans, and can also achieve accurate timing of combined one-stop right atrium ventricle pulmonary artery and pulmonary vein left atrium ventricle combined scans, realizing precise diagnosis and treatment.

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.

The invention discloses an anastomosis instrument for connecting multiple lymphatic vessels and blood vessels. The anastomosis instrument comprises a blood vessel connecting piece and a plurality of lymphatic connecting tubes. According to the integrated anastomosis instrument, the multiple lymphatic vessels can be connected to the lymphatic connecting tubes respectively through the arrangement of the integrated anastomosis instrument with the multiple lymphatic connecting tubes, and the lymphatic vessels are finally guided into the same vein blood vessel through the through holes; therefore, an efficient connection mode of multiple lymphatic vessels and a single blood vessel is realized, the surgical operation is greatly simplified, the surgical time is shortened, the surgical difficulty is greatly reduced, and the risks of postoperative bleeding, inflammation and vascular stenosis are reduced; in addition, due to the establishment of a plurality of drainage channels, the total drainage efficiency of lymph is effectively improved, and the device is more suitable for clinical conditions with large lymphatic load.

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.

The present invention relates to a female neuroendoscope sleeve assembly for deep ventricles, comprising a primary sleeve, a primary sleeve core, a secondary sleeve, and a secondary sleeve core. The primary sleeve and the secondary sleeve can be nested with each other to construct a primary channel, and the secondary sleeve and the secondary sleeve core can be nested with each other and inserted into the primary sleeve to construct a secondary channel. Through the orderly coordination of the various components in the assembly, the replacement between a primary sleeve with a larger diameter and a shorter tube length for shallow brain tissue surgery and a secondary sleeve with a smaller diameter and a longer tube length for deep brain tissue surgery can be completed through coaxial exchange technology. The use of a thinner, more mobile, less brain-damaging, and more accurately positioned secondary sub-tube to enter deep tissue or ventricles is very beneficial to the protection of deep brain functional nuclei and numerous thin-walled arteries and veins in the ventricular wall, reducing surgical side effects, lowering surgical risks, and improving the patient's neurological function prognosis.

Vascular blood flow modulation is disclosed using metallic compliance-enhancement devices that contain a sealed volume of fluid. The device includes a first elongated inflatable nitinol balloon and a second elongated inflatable nitinol balloon, each having an outer sealed terminus and an inner open fluid port, and a nitinol connector tube that fluidly couples the balloons and has a diameter smaller than the inflated diameters of the balloons. The first balloon is positioned within an arterial vessel and the second balloon is positioned within a venous vessel, with the connector tube spanning between the vessels. During systole, arterial pressure compresses the first balloon to drive fluid through the connector tube into the second balloon, thereby expanding the second balloon and increasing venous blood flow. Cyclic systolic and diastolic pressure variations cause fluid to shuttle between the balloons, producing a compliance-enhancing effect.

The utility model discloses a vein closure radiofrequency ablation component, including handle, catheter and ablation electrode that connect in proper order, the ablation electrode is provided at the front end of catheter, the rear end of catheter extends to handle rear end and is connected with joint, the inside of catheter is hollow structure, joint and the inside of catheter are communicated and are used for the leading wire to pass through before the operation. The ablation electrode is reliable in structure, simple in structure, stable, reliable and convenient to operate, normal saline is instilled to the ablation electrode in an operation to conduct the electrode tip and the outer tube, low-temperature plasma is generated under excitation of radio-frequency current to ablate varicose blood vessels, meanwhile, the high-resistance metal electrode tip is powered on to emit heat, the blood vessels are secondarily heated, and the ablation effect of the high-resistance metal electrode tip is improved. Compared with a coil type catheter, the ablation temperature is not too high, the ablation range is relatively small, tissues are not prone to adhesion, and the vein ablation closing effect is improved.

The application discloses a kind of puncture equipment for assisting venipuncture, including controller, puncture table, appearance mechanism and auxiliary mechanism, one side of puncture table forms puncture area, and puncture area is used to place human hand;Appearance mechanism and auxiliary mechanism are respectively arranged in the side of puncture table forming puncture area, controller is electrically connected with appearance mechanism and auxiliary mechanism respectively, and controller is used to control appearance mechanism, to make the vein blood vessel of human hand in puncture area appear;Auxiliary mechanism is used to obtain the image of hand vein blood vessel appearance and send to controller;Controller is used to mark vein path and puncture point to hand image respectively.The technical scheme in the application proposes that the vein blood vessel of human hand is assisted to appear by appearance mechanism, and the vein path and puncture point after appearance are marked in cooperation with auxiliary mechanism, so that medical staff can be quickly assisted to carry out venipuncture, reduce the dependence of medical staff on personal experience, and improve medical efficiency.