61 results about "Endoclip" patented technology

The invention provides an intelligent decision-making method and system for free flap riser anastomosis based on hemodynamics. According to the method, firstly, the blood flow direction, the flow speed and the blood vessel wall tension parameter of a target blood vessel are collected, and a dynamic correlation model of intravascular fluid mechanics and external tissue deformation is established; a three-dimensional blood flow pressure gradient map is generated based on the model, then, a system automatically screens an anastomosis path meeting a blood flow resistance threshold value and the endothelial cell survival rate requirement, and the optimal anastomosis pose is determined by analyzing the blood vessel wall elasticity matching degree and the turbulence generation probability. Then, guiding the accurate adjustment of the clamping direction of the blood vessel and the suture needle pitch in the operation, ensuring that the pressure of the lumen of the anastomosed blood vessel is kept balanced when the anastomosed blood vessel is axially stretched, meanwhile, effectively inhibiting local vortex, and remarkably improving the long-term smoothness of the anastomosis of the blood vessel. According to the method, mechanical precise matching and blood flow stable control of free flap vascular anastomosis are achieved, and the postoperative risk is remarkably reduced.

The invention belongs to the field of medical equipment, and provides a pair of rotatable haemostatic forceps based on bipolar electrocoagulation and mechanical clipping, which comprises a holding handle, a connector is fixedly mounted on one side of the holding handle, an electrocoagulation switch is arranged on the upper surface of the connector, a forceps rod is rotatably mounted on one side of the connector, and a fixing groove is formed in the edge of one side of the forceps rod. A first fulcrum shaft is rotationally installed on the edge of one side of the inner wall of the fixing groove, and a clamping mechanism is arranged on the outer surface of the first fulcrum shaft and used for stopping bleeding of the bleeding part. According to the surgical forceps, the rotatable forceps rod and the guide assembly used for adjusting the rotation angle of the first fulcrum shaft are arranged, a doctor can conveniently and rapidly adjust the angle of the forceps head according to the requirements of different surgical views in the surgery, the position of an instrument or the body position of a patient does not need to be frequently adjusted, the surgical operation difficulty is greatly reduced, and the surgical time cost is reduced; and the accuracy of blood vessel clamping is improved, so that the amount of bleeding in an operation is effectively reduced.

The utility model discloses a pair of double-chuck vascular tissue closing forceps, which comprises a first handheld part, a second handheld part, a traction rod, a hinge connecting piece, a long catheter, a short bent pipe, a U-shaped block, forceps chucks, a steel wire and V-shaped spring-back pieces, and two connecting parts at the other end of the steel wire are fixedly connected with the middle parts of the two V-shaped spring-back pieces respectively; each V-shaped rebounding piece is installed between the two forceps chucks in the same group, one ends of the two forceps chucks are rotationally connected with the interior of the groove in the same end through a rotating shaft, a vascular clamp is placed between the two forceps chucks in the same group, the short grooves are formed in the end faces of the two ends of the U-shaped block respectively, and a short bent pipe is fixedly installed in the middle of the U-shaped block. The blood vessel fixing device has the advantages that based on a traditional blood vessel fixing device, a double-clamping-head structure mode is adopted, two blood vessel clamps can be clamped and fixed to the same blood vessel at the same time, the hemostasis flowing strength is enhanced, operation is convenient and fast, and the problem that the operation efficiency of clamping a single blood vessel clamp is low is solved.

The utility model relates to a large area contact type thread type degradable magnesium alloy aortic blood vessel anastomat, including the conical inner ring, conical outer ring and sleeve outer ring that set gradually from inside to outside, be provided with blood vessel clamping space between the conical inner ring and conical outer ring, it is the thread cooperation between conical outer ring and sleeve outer ring, adjust the size of blood vessel clamping space through the rotation sleeve outer ring, sleeve outer ring. The utility model simple structure, reasonable in design, convenient to use, adjust the size of blood vessel clamping space through the rotation conical outer ring and sleeve outer ring to fixed blood vessel, realize blood vessel anastomosis fast, avoid the mode of the traditional everted type through end face combination simultaneously, greatly increase the contact area between blood vessel and prevent the occurrence of blood leakage.

1. Name of the product in this design: Vascular clamp. 2. Purpose of this design: To close blood vessels or tissues during general surgery. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention discloses a construction method of a rat deep vein thrombosis model, and relates to the technical field of animal models, and the key points of the technical scheme are that the construction method comprises the following steps: step 1) experimental animal selection; step 2) setting in groups; 3) preparing experimental materials and equipment; step 4) preparation before an experiment; 5) anesthesia and surgical operation; and 6) taking down the vascular clamp and closing the abdomen for disinfection. The invention provides a stable and clinically related rat deep vein thrombosis model, the repeatability and reliability of experiments are improved through accurate surgical operation, the experimental process is simplified, the research efficiency is improved, and a powerful experimental tool is provided for research and treatment of deep vein thrombosis.

The utility model relates to the technical field of blood treatment equipment, in particular to a blood cup separating device which comprises a shell, a blood collection tube bottle clamping mechanical arm is installed in the shell, a blood collection tube code reading module is installed on the blood collection tube bottle clamping mechanical arm, and a blood collection tube cover opening module is installed at the end of the blood collection tube bottle clamping mechanical arm. A blood collection tube jig is arranged on the lower portion in the shell, and a serum liquid level recognition module is arranged on one side of the blood collection tube jig. According to the blood cup separating device, through application of automatic equipment such as the blood collection tube bottle clamping mechanical arm and the pipetting mechanical arm, operations such as rapid clamping, moving, uncovering, code reading, pipetting and sub-packaging of blood collection tubes and cryopreservation tubes are achieved, the processing speed is greatly increased, and the high-throughput processing requirement is met. Through accurate identification of the blood collection tube code reading module and the cryopreservation tube code reading module and accurate measurement of the serum liquid level identification module, the accuracy of sample information and the accuracy of the branch tube quantity are ensured, and the reliability of a processing result is improved.

The present invention discloses a test tube adapter applicable to immunoassay, comprising: a support part for placing and supporting the peripheral blood vessel; a clamping part integrally fixed to the lower part of the support part, and the clamping part is used for facilitating the clamping of the peripheral blood vessel by a clamp; and a fixing part integrally fixed to the lower part of the clamping part at the end of the adapter, and the fixing part is used for fixing and positioning the adapter. Wherein, a positioning hole is formed on the side wall of the fixing part, and an induction hole is formed on the side wall opposite to the positioning hole. According to the present invention, the structure is simple and effective, enabling the peripheral blood collection tube to be placed on the detection instrument for detection. The adapter is provided with a positioning hole, which can be positioned and locked when the adapter is placed on the detection instrument. Moreover, an induction hole is formed at the lower end position of the adapter where the peripheral blood collection tube is located, so that the peripheral blood collection tube can be exposed for the detection instrument to sense the peripheral blood collection tube.

The utility model relates to the related technical field of medical instruments, in particular to a surgical vascular clamp which comprises a right pressing handle, a rotating shaft is fixedly connected to the surface of one side of the right pressing handle, a connecting ring is connected to the surface of one side of the rotating shaft in a sliding mode, and a micro-clamping mechanism is arranged on the surface of one side of the connecting ring. According to the surgical vascular clamp, through the arrangement of the micro-clamping mechanism, when the surgical vascular clamp is used, a surgeon presses a button, the button stably slides in a clamping head shell through sliding connection of a clamping block in a clamping groove, the button drives a transmission rod to move, the transmission rod pushes a main pushing block, and then the main pushing block pushes a driven block, so that the position of a left clamping head anti-skid block is further finely adjusted; the clamping force is accurately controlled, the requirements of different blood vessels are met, and by means of the arrangement, the blood vessel clamping device can more subtly adapt to complex forms and lesion characteristics of the blood vessels, and the serious consequences that hemostasis is not thorough and the blood vessel clamp falls off due to too loose clamping are prevented.

Disclosed are systems and methods for safely and effectively deploying a hemoclip onto a patient's desired target using a hemoclip system. For instance, disclosed is an catheter that includes a lumen for a hemoclip to pass through. Additionally, disclosed are hemoclips that are configured to be in a compressed position until the hemoclip is deployed out of a catheter where it opens. Then, the hemoclip may be clipped onto the target to encapsulate the desired target within the patient. Once the hemoclip is clamped onto the target, the catheter can move onto the next target for successive deployment and utilization of the hemoclips without manual reload.

The vascular clamp for the internal arteriovenous fistula operation comprises an upper fixing frame, a lower fixing frame and a connecting rod, the end, away from the end connected with the lower fixing frame, of the upper fixing frame is fixedly connected with a first clamping arm, and the portion, located at one end of the lower fixing frame, of one side of the first clamping arm is fixedly connected with a second clamping arm; the first clamping arms and the second clamping arms are arranged in a staggered mode, the opposite sides of the ends, away from the upper fixing frame and the lower fixing frame, of the first clamping arms and the second clamping arms are fixedly connected with clamping bases correspondingly, and the interiors of the upper clamping base and the lower clamping base are movably connected with clamping blocks correspondingly. And a connecting ring is fixedly connected between the connected ends of the upper fixing frame and the lower fixing frame. According to the vascular clamp, the upper clamping block and the lower clamping block are attached to each other to clamp a blood vessel, the two clamping blocks rotate in the arc grooves in a sliding mode through the sliding blocks, when arteriovenous blood vessels are clamped, the vascular clamp can be rotated under the condition that the blood vessels are not rotated, and therefore the blood vessels are prevented from being damaged.

The invention provides a tissue clamp for blood vessels, comprising: a clamping assembly, the clamping assembly comprises a clamping piece, the clamping piece is provided with a through space in a surrounding manner, and the clamping piece is used for clamping the blood vessels passing through the through space; the interior of the clamping piece is a hollow cavity, and the clamping piece can deform along with the pressure intensity of the hollow cavity; a through cavity is formed in the pressure maintaining device, one end of the through cavity is communicated with the hollow cavity, and the other end of the through cavity can be closed; the pressurizing device comprises a pressurizing channel, and the pressurizing device is detachably connected with the pressure maintaining device; when the pressurizing device is connected with the pressure maintaining device, the other end of the through cavity is opened, and the through cavity is communicated with the pressurizing channel; and when the pressurizing device and the pressure maintaining device are disconnected, the other end of the through cavity is closed. The problem that the clamping force of the tissue clamp for the blood vessel cannot be adjusted is solved, and meanwhile the situation that the tissue clamp for the blood vessel shields the operation view in the clamping process is avoided.

The invention discloses an improvement method of a rat cerebral ischemia reperfusion model, which comprises the following steps: S1, anesthetizing a rat, fixing, and separating and exposing an external carotid artery (ECA), a common carotid artery (CCA) and an internal carotid artery (ICA); s2, ligating one part of the trunk of the external carotid artery (ECA) close to the bifurcation of the trunk and the common carotid artery (CCA) to realize temporary blocking of the ECA; s3, temporarily blocking reverse blood flow at a telecentric end vascular clamp, close to the skull base as much as possible, of the internal carotid artery (ICA); the proximal end, far away from the bifurcation, of the trunk of the common carotid artery (CCA) is firmly bound through a 4-0 silk thread, and blood supply of the CCA to the brain is permanently blocked. A 4-0-degree silk thread is threaded at the position 3-5 mm away from the telecentric end of the ligation point, and a slipknot is tied to prepare a fixing thread bolt. According to the method, temporary ligation is carried out on a single part of the external carotid artery, and instant knot loosening is carried out after operation, so that partial blood supply of the ocular artery is recovered, the problem of retinal atrophy caused by long-term blocking of the external carotid artery of a traditional MCAO model is thoroughly solved, and model pathological correlation and animal welfare are considered.

The invention discloses microscopic vascular clamp holding forceps and a blood vessel clamping method.The microscopic vascular clamp holding forceps comprise a first forceps handle, a second forceps handle and an elastic steel rod, the middle part of the first forceps handle is hinged to the middle part of the second forceps handle, and the elastic steel rod penetrates through the middle part of the first forceps handle and the middle part of the second forceps handle at the same time; one end of the elastic steel rod abuts against the outer side of the middle portion of the first plier handle, the other end of the elastic steel rod abuts against the outer side of the middle portion of the second plier handle, the elastic steel rod is bent to form an annular ring structure coaxial with a hinge point, and the plier head end of the first plier handle abuts against the plier head end of the second plier handle to form a clamping jaw with the head end in a closed state. The clamping jaw is of a hollow structure from the middle portion to the tail end, and the tail end of the first plier handle and the tail end of the second plier handle are arranged in a spaced mode. The clamping forceps can prevent the microscopic vascular clamp from skewing and slipping, and is beneficial to improving the flexibility and accuracy of hand actions.

The invention discloses a blood vessel clamp holder for blood vessels, and relates to the technical field of medical auxiliary instruments. The two clamping arms are symmetrically arranged in the sleeve, and the clamping ends of the clamping arms penetrate through the left side wall of the sleeve and then are arranged on the left side of the sleeve. The clamping assembly is arranged in the sleeve; the driving assembly is arranged in the sleeve, and the driving assembly is arranged on the right side of the clamping assembly; according to the blood vessel clamping device, the two clamping arms can be properly adjusted only by rotating the threaded rod, the blood vessel is stably clamped by the two clamping arms, the falling phenomenon is avoided, the clamping force between the two clamping arms can be controlled, and the phenomenon of blood vessel rupture can be avoided.

The invention relates to an interlayer cavity separation method and device based on a clustering algorithm, equipment and a medium, and the method comprises the steps: extracting a vascular interlayer inner diaphragm model and a target vascular model based on a to-be-processed CTA image; converting the vascular interlayer inner membrane model into a grid model, and extracting a first surface patch and a second surface patch which are continuous and have the largest area; aiming at each voxel grid on the target blood vessel model, determining a grid point, closest to the first surface patch and the second surface patch, of the voxel grid; direction vectors of the voxel grids and the grid points are calculated, and feature vectors are constructed by the direction vectors and the space coordinates of the grid points; the feature vectors corresponding to the voxel grids are subjected to clustering analysis, an interlayer separation result is obtained, the problem that time and labor are consumed by manual labeling is solved, meanwhile, the method is clear in principle, and interlayer separation precision is improved.

The utility model relates to a vascular clamp capable of preventing blood vessels from being punctured and detained, and belongs to the technical field of medical instruments. Comprising a first clamping arm and a second clamping arm, and the tail end of the first clamping arm and the tail end of the second clamping arm are provided with a pressing part and a bearing part respectively; the pressing part extends from the tail end of the corresponding first clamping arm to bend towards the second clamping arm; the bearing parts extend from the tail ends of the corresponding second clamping arms to bend towards the first clamping arms; the overall length of the first clamping arm and the overall length of the second clamping arm have a length difference, a preset elastic arm section is arranged on the first clamping arm and / or the second clamping arm, and the elastic arm section generates elastic deformation when the vascular clamp is closed. According to the utility model, the risk that tissues are punctured or torn due to stress concentration is avoided, and the risk that the tissues fall off due to passive opening is reduced.

The utility model discloses a regular clamping and loosening vascular clamp which comprises a first clamping rod, the top of the first clamping rod is rotationally connected with a second clamping rod, one end of the second clamping rod is rotationally connected with a clamping head, pinching pieces are fixedly connected to the ends, away from the clamping head, of the outer portions of the first clamping rod and the second clamping rod, and a first spring is fixedly connected between the two pinching pieces. The top of the first clamping rod is fixedly connected with a first fixing plate. Belongs to the technical field of vascular clamps. According to the regular clamping and loosening vascular clamp, a user pinches a pinching piece to drive a first clamping rod and a second clamping rod to rotate mutually, so that a clamping head on the second clamping rod is far away from the first clamping rod, meanwhile, the pinching piece compresses a first spring, and after the pinching piece is loosened, elasticity of the first spring drives the clamping head and the first clamping rod to clamp a blood vessel; at the moment, the first contact abuts against the second contact, the timer is turned on to start timing, the buzzer sounds to give an alarm after timing is finished, the purpose of automatic timing is achieved, use is convenient, operation is easy, and practicability is high.

The utility model relates to a clamping nozzle assembly and a vascular clamp. The clamping nozzle assembly comprises a base part and two support arms. Each support arm is provided with a setting groove. The setting groove is provided with a first side wall surface, a second side wall surface, a first inclined bottom surface, a second inclined bottom surface and a groove bottom surface. The first side wall surface and the second side wall surface are arranged at an interval. One side of the first inclined bottom surface is connected to the first side wall surface, and the other side of the first inclined bottom surface extends towards the second side wall surface; one side of the second inclined bottom surface is connected to the second side wall surface, and the other side extends towards the first side wall surface. The two sides of the groove bottom face are connected to the first inclined bottom face and the second inclined bottom face respectively. The first inclined bottom surface and the second inclined bottom surface are inclined relative to the height direction of the arrangement groove. Due to the fact that the first inclined bottom face and the second inclined bottom face are arranged in the arrangement groove, when the supporting arm moves, the position of the supporting foot of the vascular clamp in the height direction can be kept not deviated.

The utility model relates to the technical field of medical instruments, and particularly discloses a cardiovascular clamp which comprises a first clamp arm, a second clamp arm and an elastic piece, the first clamp arm and the second clamp arm are hinged to each other to form a pipe clamp body, the first clamp arm is provided with a first recess, the second clamp arm is provided with a second recess, and the elastic piece is arranged in the first recess. The first recess corresponds to the second recess, the elastic piece is arranged on the first clamp arm, a part of the elastic piece is located in the first recess, and the elastic piece is configured to deform when being subjected to external force, so that the part, located in the first recess, of the elastic piece deforms inwards in a concave manner or deforms outwards in a convex manner; according to the scheme, external force is applied to the elastic pieces, the elastic pieces are subjected to inward concave deformation or outward convex deformation in the first concave parts, so that the bending postures of the elastic pieces in the first concave parts are changed to adapt to intubation tubes of different sizes, the application range of the cardiovascular clamp can be effectively widened, and in addition, the cardiovascular clamp is convenient to use. In this way, the situation that the clamping end of the cardiovascular clamp exceeds the cannula too long is avoided, and the cardiovascular clamp has the advantage of being convenient to operate.

The invention discloses an intelligent adjustable blood vessel closing system, which relates to the technical field of medical apparatus and instruments, and comprises a blood vessel holder and a functional module which are electrically connected and cooperatively work; the blood vessel clamping device comprises a pressing handle, a clamping arm piece, a clamping head and a self-destruction lock catch piece, the clamping head is provided with a silica gel pad and a pressure-sensitive film sensor, and a handle vibration piece is arranged in the pressing handle; the function module comprises a data acquisition module, an execution linkage control module, a hardware detection module, a data analysis module and an equipment management module; the data acquisition module preprocesses the force signal and the image data; the data analysis module evaluates the clamping force, the operation force and the blood vessel adaptation degree in a multi-dimensional mode; the linkage control module is executed to hierarchically display risks and provide clamping arm adjustment prompts; and the hardware detection and equipment management module realizes hardware state monitoring, equipment tracing and dynamic inventory management. According to the system, through mechanical structure optimization and software cooperation, the problems that the clamping force of a traditional system is difficult to control and equipment management lags behind are solved, and the operation safety and the medical resource efficiency are improved.

The arteriovenous fistula orifice precise forming vascular clamp comprises an application tool and a vascular clamp fixing assembly, the vascular clamp fixing assembly is installed at the end of the application tool, a vascular clamp assembly is installed on the side wall of the vascular clamp fixing assembly, and the vascular clamp assembly comprises a first clamping block and a second clamping block; a first annular block is fixedly installed on the side wall, close to the first clamping block, of the second clamping block, a cutting edge is fixedly installed on the outer wall of the first annular block, and a meshing block is fixedly installed on the side wall, close to the first clamping block, of the first annular block. The fistula clamp is applied to establishment of an autologous internal arteriovenous fistula (AVF) opening, the fistula opening can be quickly, efficiently and stably established in one step, manual cutting and blood vessel suturing are not needed, the fistula opening clamp can keep the shape of the fistula opening stable continuously or in a certain period in the arteriovenous fistula maturing and follow-up using process, the fistula opening is promoted to recover and form, and the situation that due to manual cutting, the fistula opening cannot be damaged is avoided. And the problems of infection, blood leakage, stenosis and the like caused by suture and the like are solved.

According to the blood vessel puncture port hemostasis plugging device and the using method, through the design of the blood return cavity and the marking tube of the dilator, an operator can directly observe pulsating blood spraying in real time, and clear and correct visual evidence is provided for whether the dilator and the tip end of a sheathing canal accurately enter a target blood vessel cavity or not. The risk that an instrument is placed in a vascular interlayer or a wrong position due to wrong hand feeling judgment is avoided, the operation safety and success rate are greatly improved, the knot pushing device integrates the functions of thread hooking, tensioning, knot pushing, cutting and the like, the thread hooking component can rapidly and firmly capture and tension a suture, and the operation safety is greatly improved. The knot pushing surface can smoothly push the movable knot to a preset position in a labor-saving manner and lock the movable knot; the implant adopts the structural design of an intravascular anchoring piece, an extravascular plugging piece and a locking cover, and can realize uniform and stable mechanical clamping and closing of a puncture opening from the inner side and the outer side of a blood vessel by combining with a suture loop capable of being locked in a sliding manner.

The invention relates to a vascular clamp, a hemostasis mechanism and a hemostasis method.The vascular clamp comprises a first clamping arm, a second clamping arm and a third clamping arm, a first clamping groove and a puncturing part are arranged at one end of the first clamping arm, and the puncturing part comprises a puncturing end; a clamping space is formed between the second clamping arm and the first clamping arm, the puncturing end is located on the edge, close to the clamping space, of the puncturing part, a protruding block is arranged at the end of the second clamping arm, and the protruding block can be connected with the first clamping groove in a clamped mode; the connecting piece is located at one end of the first clamping arm and one end of the second clamping arm, the first clamping arm and the second clamping arm can move towards each other, the connecting piece comprises a clamping groove and a clamping block, the clamping block is located at the end of the first clamping arm, and the connecting piece is located at the other end of the first clamping arm. The clamping groove is located in the edge of the clamping block and communicates with the clamping space. According to the vascular clamp, the hemostasis mechanism and the hemostasis method, blood leakage of blood vessels can be avoided.

The non-invasive blood vessel clamping and closing device for the thoracoscopic surgery comprises a forceps holder body, the forceps holder body is composed of a forceps arm A and a forceps arm B which are symmetrically arranged, one end of the forceps arm A is movably connected with one end of the forceps arm B through a hinge shaft, and an arc-shaped adjusting toothed plate is fixedly installed on the side face of one end of the forceps arm A; one end of the arc-shaped adjusting toothed plate penetrates through the clamp arm B and the adjusting mechanism in a sliding mode, the adjusting mechanism is fixedly installed on the surface of the clamp arm B and used for adjusting the opening and closing angle between the clamp arm A and the clamp arm B. A control panel is arranged on the surface of the adjusting mechanism, and an operator can send an instruction to the adjusting mechanism through the control panel. Therefore, the opening and closing angles of the two forceps arms can be flexibly adjusted, and the diversified requirements for blood vessel clamping and closing operation in the thoracoscopic surgery can be met.

The invention relates to the technical field of surgical path planning, in particular to a robot-assisted mammary gland thyroid tumor minimally invasive excision path planning method and system, and the method comprises the following steps: collecting tissue structures, poses and response contents, carrying out synchronous processing according to timestamps, recognizing vascular structures, extracting spatial differences, expanding candidate regions, and reading gray variance. And judging an included angle relation, analyzing displacement change, and generating a path planning result. According to the method, a data fusion system with a unified time index is constructed, an organizational structure, pose information and perceptual response are integrated, the time sequence consistency of input data is enhanced, the trend change of an operation area is clarified through blood vessel direction continuity and a spatial difference value extraction mode, boundary continuity recognition is achieved in combination with boundary area gray and variance features, and the recognition accuracy is improved. The advancing direction is corrected based on the path and blood vessel included angle relation, the path node sequence and the adjustment range are dynamically judged according to the displacement difference, and the response capacity and stability of path planning to intraoperative changes are improved.

A vascular clamp assembly includes a first arm assembly that is pivotably coupled to a second arm assembly. The first arm assembly includes a first pulley disposed in a first recess, and the second arm assembly includes a second pulley disposed in a second recess. A coupling member extends from a portion of the first arm assembly, the coupling member including a cylindrical portion having a first channel and a second channel extending along a portion of the cylindrical portion, and each of the first and second channels is configured to receive a portion of an engagement rod of a delivery device to secure the coupling member within a securement portion of the delivery device in one of at least two possible orientations. A portion of suture contacts each of the first and second pulley to displace the vascular clamp assembly from an opened position to a closed position.

The utility model provides a fully-closed hemodialysis external circulation pipeline, and relates to the technical field of medical equipment. The circulating pipeline comprises an artery blood drawing tube and a vein blood returning tube; the artery blood drawing tube comprises an artery main tube, and a first artery side tube, a second artery side tube and an artery jug which are communicated with the artery main tube; the vein blood return tube comprises a vein main tube and a first vein pot communicated with the vein main tube; the vein main tube is sequentially connected with a first vein side tube, a second vein side tube and a third vein side tube; the first artery side tube is communicated with the second vein side tube, and the second artery side tube is used for supplying normal saline; vascular clamps are arranged at the port of the vein main tube, the first vein side tube, the first artery side tube, the vein main tube between the second vein side tube and the third vein side tube, the third vein side tube, the port of the artery guide tube and the second artery side tube. The circulation pipeline does not cause environmental pollution and patient blood loss under the condition of closed blood leading, and blood sample collection can be completed.

The present invention relates to a vascular clip for blood flow control, wherein the vascular clip is based on a shape-memory polymer and serves to partially occlude a vessel through which excessive blood flow passes due to the incomplete automatic regulatory function thereof so as to induce normal blood flow and release the occlusion when the automatic regulatory function recovers, the occlusion is released, whereby when applied as a device to substitute for the lost automatic regulatory function of the vessel, the vascular clip can prevent cerebral hyperperfusion syndrome in advance, thus solving problems caused by the syndrome and can eliminate the risks of removal surgery, thus providing safety and convenience for patients.