334 results about "Venous blood" patented technology

The invention relates to the technical field of medical clinical auxiliary diagnosis, in particular to an orthopedic postoperative complication early detection and early warning system based on data analysis, which comprises a multi-modal sign synchronous acquisition module, a sign dynamic difference quantification module, a complication feature association module, a grading early warning decision module and a dissection calibration visualization module. Wherein the multi-modal sign synchronous acquisition module is used for acquiring postoperative data of a patient; calculating a difference quantization parameter; the complication characteristic association module is used for identifying associated risk characteristics of the osteofascia ventricular syndrome, the deep venous thrombosis and the fat embolism; and the grading early warning decision module is used for generating a three-level early warning instruction based on the associated risk characteristics. According to the system and the method, through a multi-modal sign synchronous acquisition, difference quantification and grading early warning linkage mechanism, accurate recognition, risk grade division and visual intervention guidance of postoperative complications are realized, and the continuity of postoperative monitoring and the timeliness of early warning are improved.

The invention relates to a spontaneous cerebral hemorrhage postoperative intermuscular venous thrombosis risk prediction system based on a molecular mechanism and multi-modal data and a use method thereof, image space features are extracted through a multi-modal data level CNN to be complementary with time sequence features captured and detected by Transform, and support is provided for blood coagulation-endothelium-fibrinolysis three-channel activation degree calculation; a knowledge graph alignment module of a pathology and data level maps the cross-modal features to a unified semantic space, and corrects data conflicts with pathology time sequence constraints; and channel-space-time triple attention linkage at a space-time level is carried out, and a high-risk area is accurately marked. In a path driving layer, three-path activation degrees cooperatively adjust a dynamic time window, a single-path standard-exceeding triggering monitoring interval is shortened, and a double-path standard-exceeding amplitude is multiplied; and in a closed-loop feedback layer, system parameters are updated through confidence, pathological probability and conflict signal recursion, real-time calibration of a pathological mechanism and data is realized, and thrombus risk prevention and control efficiency is comprehensively improved.

The invention discloses a venous thrombosis risk assessment method based on a large language model, and relates to the technical field of medical artificial intelligence, and the method comprises the steps: collecting thoracic surgery diagnosis and treatment data of a patient, carrying out the space-time alignment, generating a standard diagnosis and treatment data flow, and carrying out the homomorphic encryption of the standard diagnosis and treatment data flow, and forming an encrypted patient data package; inputting the encrypted patient data packet into a multi-task large language model, performing feature extraction and semantic coding by a feature coding layer, performing time sequence modeling and risk probability calculation by a risk quantification layer, and outputting a venous thromboembolism risk level of a patient; and performing feature decoupling and potential space mapping on the encrypted patient data packet to obtain thrombus semantic potential features. Through the multi-task large language model, the dual machine learning algorithm and the homomorphic encryption, the accuracy of venous thrombosis risk early warning is improved, and the safety of the risk assessment process is enhanced.

The embodiment of the invention provides a continuous blood oxygen monitoring system in extracorporeal circulation and a control method thereof. The continuous blood oxygen monitoring system comprises a vein sensor, an artery sensor, a blood flow sensor, an oxygen sensor, a carbon dioxide sensor, a controller and a display, the vein sensor monitors the vein blood oxygen saturation degree; the artery sensor monitors arterial oxygen saturation and hematocrit; the blood flow sensor monitors the blood flow of the artery pipeline; the oxygen sensor monitors the oxygen concentration of the oxygenator; the carbon dioxide sensor monitors the carbon dioxide concentration of the oxygenator; the display provides an interaction control, responds to a trigger operation acting on the interaction control, sends an interaction instruction to the controller, and updates information displayed in an interaction interface according to the control of the controller; the controller receives the interaction instruction and executes processing corresponding to the interaction instruction; the processing includes controlling display information of the display; the display information comprises information corresponding to the monitoring parameters. The scheme ensures the safety and effectiveness of the treatment process.

The utility model discloses a bleeding expelling and stopping ring with a fixing support, and relates to the technical field of medical instruments. The hemostasis device comprises a hemostasis ring and a fixing support, one end of the fixing support is detachably and fixedly connected with the hemostasis ring, and the other end of the fixing support is detachably and fixedly connected with a diseased limb. The elastic contraction ring and the bleeding stopping ring are arranged and can be tightly attached to the diseased limb, the uniform and lasting bleeding stopping effect is achieved, complications caused by a conventional air pressure tourniquet are reduced, and the occurrence of lower limb deep vein thrombosis is reduced; the rod-rod fixing clamp is arranged, the angle and the position of the support can be adjusted according to the operation requirement and the change of the body position of the patient, and therefore the accurate control over the operation body position of the patient is achieved; the bleeding expelling and stopping ring and the fixing support are connected and combined for use, so that the risk that the operation operable area range is possibly reduced and the operation difficulty is increased when one end close to the operation part is fixed through an external support is avoided, and the operation success rate is increased.

The invention discloses a preparation method and application of autologous fibrin glue, and belongs to the field of biomedical materials. The preparation method comprises the following five steps: collecting autologous venous blood, adding a sodium citrate anticoagulant with the volume ratio of 1: (8-12), and storing at 4-6 DEG C for not more than 2 hours; performing step-by-step centrifugation at the speed of 1500 to 2000 r / min and the speed of 3500 to 4000 r / min to obtain a fibrinogen concentrate; the thrombin-calcium chloride activation solution A and the tranexamic acid activation solution B are mixed according to the ratio of 1: (2-3) to form a composite activation system; mixing the two components according to a mass ratio of 1: (0.8-1.2), and reacting at 25-37 DEG C for 3-5 minutes to form colloid; and pre-freezing at-40 to-60 DEG C, performing vacuum freeze-drying, and storing at 4-8 DEG C. During application, the colloid can be coated on an operation wound surface after being redissolved, or mixed with a growth factor to prepare a dressing for covering a chronic wound surface. The colloid is high in purity, stable in coagulation time, long in storage period, suitable for scenes such as surgical hemostasis and the like, and high in clinical value.

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 provides autologous platelet-containing plasma gel and a preparation method and application thereof, and relates to the technical field of biological medicine and tissue engineering.The preparation method comprises the following steps that peripheral venous blood of a patient is extracted and added into a centrifugal tube mixed with a sodium citrate anticoagulant; putting the centrifugal tube into a centrifugal machine for centrifuging, and taking upper-layer plasma; wherein the upper-layer plasma refers to plasma between the upper-layer liquid level and the lower-layer red blood cell layer by 1mm; the centrifugal speed ranges from 1300 r / min to 1700 r / min; the centrifugation time is 3-5 min; under a sterile condition, preparing a calcium gluconate / thrombin mixed solution; and dropping the calcium gluconate / thrombin mixed solution into the upper plasma, mixing, and solidifying to obtain the autologous platelet-containing plasma gel. After one-time centrifugation, upper-layer full-layer plasma is extracted, the volume of the prepared gel is far larger than that of a traditional method, the utilization rate of whole blood platelets and fibrinogen is close to 100%, and regeneration and repair of large-area tissue wounds can be met.

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 a vein blood oxygen saturation real-time measurement system and method based on an LED light source. The method comprises the steps that 1, a pulse driving circuit outputs pulse voltage to drive LEDs with different wavelengths in a dual-wavelength LED light source to flicker alternately; collecting a photoacoustic signal by an ultrasonic transducer; 2, the ultrasonic signal processing platform receives the collected sound signals and carries out subsequent processing; 3, controlling the ultrasonic transducer to transmit an ultrasonic signal to the same measured part, and receiving an echo signal of the ultrasonic transducer; reconstructing an ultrasonic image of the measured part based on the echo signal; step 4, in the obtained ultrasonic image, positioning a vein to be analyzed and an adjacent artery thereof, and positioning the vein in the ultrasonic image; 5, the arterial oxygen saturation value of the whole body is measured through a finger clamping type pulse oximeter, and quantitative calculation of the venous oxygen saturation is achieved; and step 6, carrying out pixel-level fusion on the oxyhemoglobin saturation information and the ultrasonic image, and realizing visualization on the same frame of ultrasonic image.

A device may include a control element coupled to a valve disposed in an outer frame. The control element is configured to manipulate the valve between an unrestricted blood flow state and a restricted blood flow state. A device may include an actuation device including a linear actuator coupled to a control element of an implantable device, and a first magnet configured to induce rotation of the linear actuator. A control device communicatively coupled to the linear actuator includes a second magnet configured to generate a changing magnetic field pole direction to cause rotation of the first magnet either to tension the control element to position a valve of the implantable device in a restricted blood flow state or to release tension in the control element to position the valve in an unrestricted blood flow state.

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 application discloses a lower limb venous thrombosis prevention training device and particularly relates to the field of training devices. The device comprises a support frame, both sides of the bottom of the support frame are provided with placing grooves, a sliding block is slidably connected to the support frame, a limiting groove is fixedly connected with the sliding block and slidably connected to the support frame, two driving racks are symmetrically arranged on the two sides of the sliding block and fixedly connected with the sliding block, two first driving gears are respectively engaged with the corresponding driving racks, each first driving gear is rotatably connected to the support frame, two flexible shoes are symmetrically arranged and each flexible shoe can be detachably connected with the limiting groove and the first driving gear, and a driving assembly can be driven by a user to move the sliding block. The application solves the problem that the existing prevention training device is not suitable for the elderly patients with insufficient muscle strength and improves the initiative of patient training.

The invention provides a stepped air bag control method for preventing venous thrombosis based on infrared detection, and relates to the technical field of medical instrument control, and the method comprises the steps: obtaining the tissue oxygen saturation of at least one monitoring point of a target limb of a target user through a near-infrared sensor; when the target user is a hemiplegic individual, determining a control parameter of the stepped air bag according to the tissue oxygen saturation, and controlling the stepped air bag worn by the target limb to work according to the control parameter, so that the tissue oxygen saturation of the target limb reaches a preset state; the tissue oxygen saturation difference value of the hemiplegic side lower limb and the healthy side lower limb of the target user is smaller than a preset balance threshold value. According to the method provided by the invention, the stepped air bag can be dynamically controlled according to the real-time blood circulation state of the individual, the suitability, the real-time performance and the safety of venous thrombosis prevention of the limbs of the paralyzed individual are improved, and the use requirements of different individuals are met.

The utility model relates to the field of massage leg sleeves, in particular to an air pressure massage leg sleeve for preventing venous thrombosis. According to the technical scheme, side edge connecting belts are arranged on the two sides of a cotton external inflation protective sleeve; the number of the side edge connecting belts is six, and three side edge connecting belts are arranged on the same side. A side edge adhesive tape is arranged at the upper end part of the side edge connecting belt; the side edge connecting belts and the side edge adhesive tapes are arranged into one group, and six groups are arranged in total and are uniformly distributed on two sides. By arranging the main body connection protection structure, adhesion type wrapping work can be conveniently conducted on the whole leg, meanwhile, the heating structure is arranged in the device to conduct internal heating, rapid blood activating work can be achieved on the leg, the venous thrombosis prevention massage efficiency can be conveniently accelerated and improved, the inflation structure is arranged at the front end of the whole device, and the inflation structure is arranged at the back end of the whole device. And finally, the movable rotating structures are arranged on the two sides of the connection inflation structure, so that the protection work of the connection inflation structure is achieved, and the practicability and comfort are enhanced.

To provide a blood purification device that can accurately determine whether a venipuncture has been performed correctly in a patient. [Solution] The blood purification device 1 comprises a blood purifier 3 capable of purifying blood, a blood circuit 2 having an arterial blood circuit 21 with an arterial puncture needle 211 attached to its tip and a venous blood circuit 22 with a venous puncture needle 221 attached to its tip, an impedance measuring unit 5 having an oscillator 53 that applies an AC voltage between an arterial electrode 51 provided on the arterial blood circuit 21 and a venous electrode 52 provided on the venous blood circuit 22, and capable of measuring the frequency characteristics of the impedance between the arterial electrode 51 and the venous electrode 52, and a puncture determination unit 72 that determines whether the patient has been properly punctured based on the measured impedance frequency characteristics, and further comprises a frequency range determination unit 70 that determines the frequency range of the AC voltage applied by the oscillator 53 according to the liquid in the blood circuit 2.

The invention relates to medicine, in particular to gerontology and therapy and can be used for treating sarcopenia in elderly patients.Summary of the invention consists in alternating for 1…2 days the intravenous administration of ozonized 0.9% NaCl solution and major autohemotherapy, namely 500 mL of a 0.9% NaCl solution ozonized with an ozone-oxygen mixture, with an ozone concentration of 5…10 µg / mL, are administered, and major autohemotherapy consists in collecting 300…400 mL of venous blood from the patient, which is ozonized, with an ozone concentration of 15 µg / mL and transfused to the patient, the treatment course includes 8…10 consecutive procedures, then it is extended with minor autohemotherapy, which consists in collecting 5…10 mL of venous blood, which is ozonized, with an ozone concentration of 15 µg / mL and administered intramuscularly every 10th day of alternation and includes 3 consecutive procedures, and the ozonized 0.9% NaCl solution is administered for up to 6…8 weeks.

The invention discloses a biomarker for detecting venous thrombosis and application of the biomarker, and belongs to the technical field of molecular markers, the biomarker is ESM1, early diagnosis and positive prevention of venous thrombosis embolism can be achieved by monitoring the marker, and compared with a diagnosis method in the prior art, the biomarker has the advantages that the biomarker is simple and convenient to use. The marker provided by the invention is a plasma-derived biomarker, can avoid invasive diagnosis, is minimally invasive in sampling, is easy to detect, does not cause body injury, and does not need to use a large instrument. Meanwhile, the ESM1 and D-dimer combined detection improves the sensitivity and accuracy of the existing serological detection method (D-dimer detection) for judging thrombus, and can be used for early prevention and treatment effect evaluation of venous thrombosis.

The present invention discloses a trimer of Asn-Gly-Pro, namely [Asn-Gly-Pro]3, discloses its preparation method and its application in the treatment of venous thrombotic diseases. Experiments have proved that [Asn-Gly-Pro]3 of the present invention not only has a good anti-venous thrombosis effect, but also the anti-venous thrombosis effect is significantly stronger than that of Asn-Gly-Pro. Therefore, it is proposed that the present invention provides an effective technical means for anti-venous thrombosis.

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 application discloses a kind of prevention instruments for deep vein catheter thrombus, belong to thrombus prevention technical field.It includes bottom plate, one end of bottom plate is equipped with deflection block, the bottom plate is equipped with fixed plate behind deflection block, one end of fixed plate is fixedly connected to bottom plate, the other end of fixed plate is equipped with sliding column, one end of sliding column is surface contact with deflection block, the other end of sliding column is equipped with torque amplification assembly on both sides, torque amplification assembly includes first connecting rod, one end of first connecting rod is rotatably connected to the other end of sliding column, second connecting rod is equipped on the other end of first connecting rod, one end of second connecting rod is rotatably connected to the other end of first connecting rod, traction rope is equipped on the other end of second connecting rod, stand is equipped on second connecting rod, one end of stand is connected to bottom plate, the other end of stand is rotatably connected to second connecting rod.This technical scheme is used to improve the prevention effect of venous thrombosis.

This invention discloses an early screening system and method for hyperuricemia based on fingertip blood uric acid detection. The system includes a fingertip blood collection module, a detection module, a data processing module, a storage module, an analysis module, an early warning module, a display module, a communication module, a calibration module, and a power supply module. It accurately collects fingertip blood samples from subjects, obtains blood uric acid concentration data using specific detection equipment, constructs a multi-dimensional analysis model based on clinical characteristic parameters, and determines the optimal diagnostic cutoff value based on ROC curves, achieving rapid and accurate screening for hyperuricemia. The method includes steps such as sample collection, detection, data processing, model analysis, result determination, and early warning. It is simple to operate, fast, and highly accurate, solving the problems of poor compliance and difficulty in grassroots implementation associated with traditional venous blood testing. It is suitable for large-scale population screening and early diagnosis of hyperuricemia in areas with scarce medical resources, and has significant clinical application value and social significance.

The present invention relates to a method by which intravenous fluids, blood or artificial blood containing high levels of mechanically infused dissolved oxygen can be used to maintain appropriate oxygen levels in venous blood to provide short term oxygenation support to a compromised patient or trauma patient. In one aspect, a system and method for oxygenating a biological fluid for a compromised subject or trauma subject in need of oxygenation support to maintain the subject at an appropriate oxygen level is provided, the method comprising: supplying oxygen from an oxygen source; and dissolving an amount of the supplied oxygen into the biological fluid to obtain an oxygen enriched biological fluid.

The utility model relates to the technical field of internal fistula exercisers, in particular to an internal arteriovenous fistula exerciser which comprises an elbow seat, an air bag is arranged on the upper surface of the elbow seat, a grabbing mechanism convenient for a patient to grab and exercise internal fistula is arranged at the front end of the elbow seat, a telescopic groove is formed in the front end of the elbow seat, a telescopic sleeve is inserted into the telescopic groove in a sliding mode, and the telescopic sleeve is connected with the elbow seat. And the connecting frame is inserted into the front end of the telescopic sleeve in a sliding manner. According to the internal arteriovenous fistula exerciser, a one-way air inlet valve is further arranged on an air bag, so that an inflatable cuff is conveniently controlled to expand to extrude arms to promote vasodilation, arteriovenous blood deposition of upper limbs is achieved, and therefore the filling degree of internal fistula blood vessels is increased, and a telescopic sleeve connected to the front end of an elbow seat and a connecting frame are connected with an exerciser body through a rotating rod; meanwhile, the four-finger fixing belt and the thumb fixing belt are arranged on the upper side and the lower side of the exerciser main body, so that patients with different arm lengths can conveniently hold the exerciser main body for exercise.

The method for establishing a high-dimensional Raman spectrum dimension reduction training model in noninvasive detection is a method for dimension reduction training from high-dimensional spectral data to low-dimensional characteristic peak data. The original data set is obtained by collecting Raman spectrum and test results while collecting human venous blood for testing. Abnormal spectra are removed through t test and Z test. The spectral data are baseline corrected through the least square method. The noise in the spectrum is eliminated through discrete wavelet transform. Dynamic dimension reduction is realized through pre-characteristic peak screening, wavelet method, recursion method and verification to generate a pre-training data set. The present application solves the problems of inaccurate characteristic peak selection, uncertain device system error, characteristic peak superposition of mixed substances and non-support of dynamic characteristic peak optimization, realizes the accuracy of the characteristic peak in iteration can be continuously optimized, and provides innovative achievements and foundation for later quantitative measurement of mixed substances.

The utility model belongs to the technical field of medical teaching models, and particularly discloses a simulation limb arteriovenous hemorrhage simulation device which comprises a simulation blood storage device and a simulation limb, a blood pressure circulation control box is arranged between the simulation blood storage device and the simulation limb, and the simulation blood storage device is connected with the blood pressure circulation control box through a liquid extraction pipe. An artery tube set used for simulating artery blood supply and blood overflow and a vein tube set used for simulating vein blood supply and blood overflow are arranged in the simulation limb, and a liquid outlet of the blood pressure circulation control box is communicated with a backflow opening of the simulation blood storage device and an artery blood outlet in the simulation limb through the artery tube set. Or the liquid outlet of the blood pressure circulation control box is communicated with the backflow port of the simulation blood storage device and the vein bleeding port on the simulation limb through the vein tube group. According to the utility model, the artery tube group and the vein tube group are arranged in the simulation limb, so that blood pressure changes in different states, including arterial high-pressure bleeding, vein low-pressure errhysis and other scenes, are simulated, and the sense of reality of training is enhanced.

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 provides an ankle pump exercise training device which comprises a base, a supporting pedal, a flexion and extension assembly, a swing assembly and a rotary connecting piece, a leg placing area is arranged at the top of the base, a first fixing piece is arranged on the base, and a second fixing piece is arranged on the supporting pedal; the fixed end of the swing assembly is fixed to the base, the swing output end of the swing assembly is fixedly connected with the rotary connecting piece, and the swing assembly drives the rotary connecting piece to rotate relative to the base. The rotary connecting piece is rotationally connected with the flexion and extension assembly, a flexion and extension output shaft of the flexion and extension assembly is fixedly connected with the supporting pedal, the flexion and extension output shaft of the flexion and extension assembly is rotationally connected with the rotary connecting piece, the fixed end of the flexion and extension assembly is fixedly connected with the rotary connecting piece, and the flexion and extension assembly drives the supporting pedal to rotate relative to the rotary connecting piece. The training mode of the ankle pump movement training device is more comprehensive and effective, and the technical effects of standardizing ankle pump movement of a patient and effectively preventing venous thrombosis can be achieved.

The invention relates to the technical field of thrombus resistance instruments, in particular to an electric adjustable ultrasonic developing thrombus resistance instrument. In order to solve the problems that venous thromboembolism occurs frequently after a surgical operation, existing prevention means have defects, and the clinical requirements for reducing the occurrence rate and the death rate are difficult to meet, the following technical scheme is provided that the venous thromboembolism prevention device comprises a bearing table, the bearing table comprises a head plate, and a fixing plate is hinged to one side of the head plate; a sliding plate is arranged below the fixed plate in a sliding mode, and a foot plate is hinged to the side, away from the fixed plate, of the sliding plate; the fixed frame is arranged below the bearing table and is used for supporting; and the adjusting mechanism is mounted on the fixed frame and is used for adjusting the distance between the head plate and the foot plate. The device can effectively adapt to different patients and flexibly adjust the body position, and thrombus prevention and monitoring are integrated, so that the occurrence rate and death rate of venous thrombus are reduced, and the pain and risk of the patients are reduced.

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.