408 results about "Radial artery" patented technology

The invention relates to the technical field of medical apparatus and instruments, in particular to a pressure-visible automatic decompression radial artery compression hemostat which comprises a base, a fixing box is fixedly mounted at the upper end of the base, two sets of fixing rods are fixedly connected to the two sides of the base, and the outer surfaces of one set of fixing rods are movably sleeved with a bandage. A radial artery pressing block is installed at the bottom of the base, and a pressing mechanism is arranged in the fixing box. Through the arrangement of the compression mechanism, the pressing distance of the hemostatic pad is controlled according to a set pressure value, the pressure reduction time and the number of turns of the threaded rod driven by the automatic control driving motor to rotate are set according to the time point needing pressure reduction and the amount needing pressure reduction, the pressing strength on a puncture part is reduced every time when the pressure reduction time point is reached, and the puncture effect is improved. The situation that a doctor cannot adjust the hemostat in time is avoided, the doctor is reminded to check and observe whether the skin color of the puncture part of the patient is abnormal or not through the loudspeaker and the wireless communication module, and therefore pressure can be adjusted in time.

The invention discloses a non-invasive hemodynamics monitoring method and system based on deep learning, and relates to the technical field of medical instruments, and the method comprises the steps: obtaining invasive blood flow data and non-invasive radial artery waveform data of a corresponding time point; time reference alignment is carried out on invasive blood flow data and non-invasive radial artery waveform data through time points, time drift errors between invasive and non-invasive equipment are eliminated, an initial non-invasive detection model is constructed, the method better fits the actual state of non-invasive detection, non-invasive feature vectors are used as input features after vascular elasticity compensation processing, and the non-invasive detection accuracy is improved. The initial non-invasive detection model is trained by taking blood flow parameters in the invasive data set as supervision annotation data, so that the consistency of model output and real invasive blood flow parameters is improved, 'waveform fragment-blood flow parameter 'space-time mapping is established, the running dynamic state of the non-invasive detection model is evaluated and analyzed, and the detection accuracy is improved. The performance change of the model in the training and running process can be monitored in real time, and convergence, over-fitting and under-fitting problems can be found in time.

The invention discloses a non-contact pulse wave and heart rate detection method combining sliding window filtering and a multi-head attention mechanism, and the method comprises the following steps: selecting a radial artery region from a human wrist video as a region of interest, obtaining a mean time sequence of the region of interest in the video, and taking the sequence as an initial pulse wave signal; the signal is preprocessed through three times of sliding window filtering to achieve the effects of detrending and denoising; dividing the preprocessed sequence signal into a training set, a verification set and a test set according to a corresponding proportion; constructing a trainable deep learning network model combining a multi-head attention mechanism and a multi-layer perceptron; sending the divided training set into a deep learning neural network for training, wherein the output of the model is more accurate pulse waves with more details recovered; the pulse waves are subjected to Fourier transform, the main frequency of the pulse waves is obtained, and therefore the heart rate is obtained; and connecting a preprocessing algorithm, the trained deep learning model and a heart rate calculation algorithm to obtain an end-to-end non-contact pulse wave and heart rate detection network. According to the method, the accuracy of non-contact measurement of the pulse wave and the heart rate is improved.

The invention belongs to the technical field of radial artery haemostat, and particularly relates to a multifunctional radial artery haemostat which comprises a base, a haemostasis sliding hole is formed in the top of the base in a penetrating mode, a haemostasis pressure piece is arranged in the haemostasis sliding hole in a sliding mode, mounting grooves are formed in the two ends of the base, and a bandage is fixedly mounted between the two mounting grooves jointly. The bandage is made of flexible non-woven fabric, and the hemostasis pressing piece comprises a compression internal thread tube which is installed in the hemostasis sliding hole in a sliding mode. After a medical worker stops pressing the two pressing blocks, a reset spring pushes the friction tile to reset under the action of resilience force, and the abutting effect with the friction ring is relieved, that is, after the medical worker stops pressing the two pressing blocks, if the twisting sleeve rotates again, the adjusting screw cannot be driven to rotate, and therefore the pressing inner threaded pipe cannot move upwards or downwards, and the medical worker cannot be damaged. The twisting sleeve is prevented from rotating and hurting the wound of the radial artery of the patient again, and the safety protection performance of hemostasis is improved.

The invention belongs to the technical field of radial artery compression haemostat, and relates to an intelligent control system and method for a radial artery compression haemostat, and the method comprises the steps: determining the adaptive initial pressure of the radial artery compression haemostat for a target patient through combining the individual medical representation angle and historical experience reference angle of the target patient; the initial hemostasis effect of the radial artery compression hemostat on the target patient is evaluated, the adaptive initial pressure is continuously corrected until the initial hemostasis effect reaches the expectation, and then the hemostasis condition of the target patient is monitored in real time to judge whether the preset decompression decision condition is met or not; the method comprises the following steps: executing pressure reduction operation of the radial artery compression hemostat, evaluating and feeding back the pressure reduction operation reasonability of the radial artery compression hemostat for a target patient, and executing wearing release prompt operation of the radial artery compression hemostat when the pressure balance state of the radial artery compression hemostat lasts for a preset duration. And highly intelligent and personalized management of the radial artery compression hemostat is realized.

Disclosed are methods and devices for obtaining patent hemostasis of the radial artery by compressing the uninstrumented ulnar artery to increase radial artery flow. The device comprises a band having an inflatable bladder for applying blunt pressure to the ulnar artery. The method comprises applying a pressure to the homolateral ulnar artery and applying a pressure to the radial artery at the access site to obtain hemostasis at the access site. The method further comprises administering an anticoagulant to a patient at a dose ranging from about 20 units per kg of body weight to about 30 units per kg of body weight.

The application discloses a preparation method of a resistance / capacitance dual-response MXene-based hydrogel flexible sensor, and the hydrogel flexible sensor is prepared by combining a microstructure hydrogel prepared from polyacrylamide, gelatin and MXene with an interdigital electrode. The hydrogel flexible sensor can simultaneously detect resistance response signals and capacitance response signals. The detected resistance and capacitance signals are complementary to each other, the single response signal mode of the flexible sensor is widened, the mutual calibration of the same group of data is realized, and the detection precision of the flexible sensor is improved. The MXene-based hydrogel flexible sensor is applied to the detection of human biological signals, for example, carotid artery pulse detection and radial artery pulse detection.

The invention belongs to the technical field of medical equipment, and particularly relates to a cardiovascular intervention postoperative radial artery compressor which comprises a U-shaped base, a rubber sleeve is fixedly connected to the inner wall of the bottom end of the U-shaped base, a metal iron plate is fixedly connected to the upper surface of the rubber sleeve, and an auxiliary mechanism is fixedly connected to the outer wall of the metal iron plate. The radial artery compressor has a compression force visualization function, can help medical care to precisely regulate and control compression force, formulate a personalized scheme, facilitate real-time monitoring and data analysis, reduce the complication risk of a patient and improve the nursing effect, also has a skin heat preservation function, can promote local blood circulation, accelerate wound healing and relieve discomfort of the patient, and has a good application prospect. And the compressor has the functions of stabilizing a punctured arm and adjusting the height, and is beneficial to venous return, swelling reduction, reduction of blood deposition at a puncture point and improvement of the use reliability and effect of the compressor.

The invention discloses a radial artery compression hemostat, and aims to solve the problems that a current radial artery compression hemostat cannot accurately measure the pressure on a patient in the use process, so that the pain of the patient is easily increased; the technical problem that a screen display device on the hemostat cannot be used normally due to the fact that a button battery cannot be replaced in time due to sudden power failure during use is solved, the hemostat structurally comprises a hemostasis device and a pressurization device, and the hemostasis device comprises a supporting plate, a compression pad and a bandage; the compression pad is fixedly connected to the bottom of the supporting plate, the two ends of the bandage are sleeved with the sleeve buckles at the two ends of the supporting plate, and the pressurizing device comprises a rotary knob and a rotary rod. The hemostat can accurately measure the pressure and relieve the pain of a patient, is greatly helpful for medical treatment, is suitable for patients with little bleeding and massive bleeding, is convenient for popularization of surgery and internal medicine, improves the treatment efficiency, and strives for operation time for doctors.

The utility model belongs to medical instruments, and discloses a radial artery hemostasis compressor which comprises a transparent fixing plate and a ribbon, pull rings are arranged at the two ends of the transparent fixing plate respectively, one end of the ribbon is arranged on the pull ring on one side in a sleeved mode, and the other end of the ribbon is bound around the pull rings to limit the transparent fixing plate on the arm of a patient. A fixed circular column is arranged on the transparent fixed plate, a movable rod is arranged in the fixed circular column, the axis of the movable rod extends towards the surface of the arm, and the movable rod is limited by the fixed circular column to achieve linear sliding sleeving; a rotating block is rotationally connected to the fixed circular column and provided with a groove or a through hole, internal threads are arranged in the groove or the through hole, external threads are arranged on the outer portion of the movable rod, and the rotating block is matched with the movable rod in a threaded mode. The utility model provides a structure adopting mechanical pressure detection, which has a simpler structural design, can be suitable for high-temperature disinfection and repeated use, and is lower in cost and higher in stability.

The invention relates to the technical field of molecular diagnosis, on one hand, the invention relates to a coronary artery microvascular disease (CMVD) related biomarker, and the biomarker comprises one or two of MW0107116 and MW0104774; on the other hand, the invention relates to application of the biomarker in preparation of a diagnostic product for detecting coronary artery microvascular diseases. Compared with a traditional circulating biomarker, the metabolite MW0107116 and MW0104774 serving as the biomarker for diagnosing the coronary artery microvascular disease has higher specificity, can be used for preparing a diagnostic product for detecting the coronary artery microvascular disease, is beneficial to simplifying the diagnosis of the coronary artery microvascular disease, and can be used for detecting the coronary artery microvascular disease. And the biomarker is detected by collecting a blood sample from the radial artery of a patient, so that invasive examination of coronary angiography for collecting blood from the coronary artery is avoided, and the biomarker is more friendly to the patient and has important clinical significance.

Some embodiments of percutaneous ventricular assist devices have an expandable pump impeller and an associated flexible drive shaft. The drive shaft can be coupled to a motor located external to the patient. The motor can rotate the drive shaft to spin the pump impeller inside of the pump housing, causing blood to be pumped within the patient. In some embodiments, the pump impeller is inflatable and / or self-expandable. The percutaneous ventricular assist devices with inflatable or self-expandable pump impellers are designed to have very small delivery profiles. Accordingly, various deployment modalities, including radial artery deployment, are practicable using the two-part percutaneous ventricular assist devices described herein.

The utility model provides a radial artery paracentesis postoperation compression hemostasis braking device which comprises a fixing plate, fixing pieces and a pressurizing assembly, the fixing pieces and the pressurizing assembly are installed on the fixing plate, the two fixing pieces are arranged at the two ends of the fixing plate, and the pressurizing assembly is arranged between the two fixing pieces. The pressurizing assembly comprises a clamping piece used for being clamped outside a surgical limb of a patient and a pressing piece used for being pressed on a puncture point, the pressing piece is installed on the clamping piece, a containing space for containing the surgical limb is formed between the fixing plate and the clamping piece, and at least one part of the pressing piece stretches into the containing space; according to the device, at least the palm-to-forearm section of the operative limb is fixed to the fixing plate through the fixing piece, so that the wrist joint is braked, the braking effect is good, and movement of the operative limb is not affected; the pressing piece does not influence normal blood supply of an operation limb, the compression hemostasis effect of a puncture point is good, meanwhile, operation is easy, and the workload of medical staff can be reduced.

A method, a computer-readable medium and a system for reconstruction of a patient-specific central aortic pressure waveform morphology using a non-invasive distal pressure measurement and a non-invasive recording of a distal pressure waveform are disclosed. Measurements of patient's systolic and diastolic pressures as well as patient's heart rate are made at a distal position, for example using the radial artery. The invention makes use of patient-specific demographic and health data, e.g., gender, age and / or current medication. The patient-specific central arterial pressure waveform morphology is calculated using a lumped-parameter multi-compartment model of the Windkessel type. The method does not assume structural rigidity of a transfer relationship, but it assumes an evolutionary law that provides the relationship between distal and proximal pressures. The invention provides values of a central arterial blood pressure and of a proximal flow rate which are useful in diagnosis of an elevated heart pressure or hypertension or both. The method has been validated using clinical trials. The method of the invention reproduced the values obtained using invasive methods from the clinical trials.

The utility model relates to the technical field of medical apparatus and instruments, and discloses a radial artery compression hemostat which comprises a fixing assembly and a fixing assembly, the fixing assembly comprises a fixing plate and a fixing band, and the fixing band is connected with the fixing plate end to end; the adjusting assembly comprises an adjusting part and a driven part, the adjusting part is arranged on one side of the fixing plate, the driven part is arranged on the other side of the fixing plate, and the driven part penetrates through the fixing plate and extends into the adjusting part; the hemostasis assembly is arranged at the end, away from the adjusting piece, of the driven piece. According to the radial artery compression hemostat, by arranging the detection assembly tightly attached to the arm, when the radial artery compression hemostat is used for stopping bleeding of a puncture part, under the effect that the detection assembly monitors the blood oxygen saturation of a patient, sound-light alarm prompt can be automatically triggered when the blood oxygen saturation exceeds a set range; medical staff are reminded to adjust the compression pressure of the hemostat in time, and the situation that a patient is uncomfortable or injured due to excessive or too loose compression is avoided.

The utility model provides an electronic radial artery compressor, which relates to the technical field of medical devices, and solves the defects in the structural design of the radial artery compressor in the prior art, the relative displacement between the inflatable cuff and the puncture point is easy to occur, and the pressure sensor has a high detection error, which affects the hemostasis effect. During the inflation and pressurization process, the cuff body of the utility model drives the compression structure to form a compression effect on the puncture point of the radial artery. At the same time, the pulse sensor detects the pulse of the radial artery in real time until the pulse of the radial artery cannot be detected. The cuff body stops inflating and maintains the current pressurization state to achieve hemostasis of the puncture point of the radial artery. And because a limiting structure is set on one side of the compression structure, the limiting structure fits tightly with the skin around the puncture point, and can keep the relative position of the compression structure and the puncture point of the radial artery unchanged during the inflation and pressurization process, ensuring the accuracy of the pulse sensor detection process and the real-time feedback response.

The utility model discloses a wearable vascular elasticity detection and evaluation device, the wearable vascular elasticity detection and evaluation device comprises a host, a wearable wrist strap, a detection module and a control module, the detection module is arranged on the wearable wrist strap, and the position of the detection module corresponds to the radial artery of the wrist of a human body and the position nearby the radial artery; the control module is arranged in the host, the control module is in communication connection with the detection module, and the control module is used for controlling the detection module to obtain the pulse wave signal according to a preset instruction so as to generate a pulse wave waveform. According to the wearable vascular elasticity detection and evaluation device, radial artery pulse wave information is directly measured, optical pulse waves, measured by PPG, of arteries or blood capillaries or muscular tissue are more accurate, support is provided for more accurate evaluation of artery and blood vessel elasticity, meanwhile, detection is actively initiated by the wearable vascular elasticity detection and evaluation device, and the detection accuracy is improved. The user compliance and the equipment use efficiency are improved, and the health state of the user can be better detected and evaluated.

The invention provides a radial artery radiography cannula, and relates to the technical field of medical instruments, the radial artery radiography cannula comprises an inner tube and an outer cannula, the inner tube comprises an inner tube catheter seat and an inner tube body, the outer cannula comprises an outer cannula catheter seat and an outer cannula body, the inner tube catheter seat is provided with a connector part, and the connector part can be connected with the outer cannula catheter seat in a matched mode. The inner tube body penetrates into the outer tube body, the outer tube and the inner tube can be locked and matched through the connector part and the outer tube catheter base, the adaptability is good, gas embolism or thrombus is not prone to being caused, the end of the middle cavity is sealed through the locking position, blood cannot overflow, and the influence on surgical operation is avoided; the inner tube and the outer tube are synchronous when a large blood vessel on an arch is subjected to super-selection, the outer tube and the inner tube are separated after the outer tube points to a target blood vessel, super-selection is conducted towards the far end to the target blood vessel under the support of the guide wire and the inner tube, the controllability of the catheter is improved, and the super-selection difficulty is reduced.

The invention provides a radial artery compressor control method and related equipment, and can be applied to the technical field of image processing. The method comprises the following steps: acquiring a first laser blood image acquired by an image acquisition component for a hand region of a target object; determining a target speckle contrast according to the pixel intensity of the pixel points in the first laser blood image, and determining the current blood flow rate of the hand region according to the target speckle contrast; under the condition that the current blood flow rate indicates that the radial artery has the occlusion risk, the ulnar artery air bag is controlled to deflate, and target pressure is determined according to the maximum pressure pulse wave amplitude of the target object in the ulnar artery air bag deflation process; and the ulnar artery air bag is controlled to be inflated until the pressure applied to the ulnar artery by the ulnar artery air bag reaches the blocking pressure, and the radial artery air bag is controlled to be inflated or deflated until the pressure applied to the radial artery by the radial artery air bag reaches the target pressure. In the application, the blood flow of the radial artery is ensured to be smooth so as to avoid radial artery occlusion.

The invention provides an early warning system and method for a radial artery compression hemostat based on multiple sensors, and belongs to the technical field of complication early warning. The method comprises the steps that S1, multiple types of physiological signals of a radial artery compression area are synchronously collected and subjected to digital processing; s2, discrete wavelet transform is carried out on the proximal end temperature and the telecentric end temperature; performing time domain analysis on the pulse signal, and extracting to obtain pulse amplitude; s3, constructing a temperature distribution model of the compression area based on the temperature difference signal; s4, the resistivity distribution of the compression area is reconstructed through the electrode impedance signal, and the errhysis position is positioned; s5, calculating a pressure change rate based on the pressure digital signal; calculating a pulse amplitude attenuation rate based on the pulse amplitude; and fusing the pressure change rate, the temperature gradient vector, the pulse amplitude attenuation rate and the errhysis index through a weighted summation formula to obtain a comprehensive risk value. According to the invention, through multiple types of sensors, the complication related parameter coverage rate is improved, and the complication early warning timeliness and accuracy are improved.

The present invention belongs to the technical field of radial artery hemostatic devices, and specifically relates to a radial artery hemostatic device with automatically set pressure, which includes an elastic ring. The elastic ring has a notch and an elastic connecting piece is fixedly connected at the notch. Rubber contact blocks and pressing blocks are fixedly installed on the inner diameter wall of the elastic ring to increase the friction force. A pressure application component is installed on the outer diameter wall of the elastic ring. By adopting the cooperation of the pressure application component and the limiting component, the gas pressure can be quickly transmitted into the pressing block and the affected part of the patient can be quickly compressed. At the same time, the limiting component can adjust the pressure on the pressure application component, thereby controlling the pressure application component to reduce the required pressure, and automatically relieve pressure when the affected part swells, avoiding adverse effects on the body caused by long-term swelling of the affected part.

Disclosed are methods and devices for obtaining patent hemostasis of the radial artery by compressing the uninstrumented ulnar artery to increase radial artery flow. The device comprises a band having an inflatable bladder for applying blunt pressure to the ulnar artery. The method comprises applying a pressure to the homolateral ulnar artery and applying a pressure to the radial artery at the access site to obtain hemostasis at the access site. The method further comprises administering an anticoagulant to a patient at a dose ranging from about 20 units per kg of body weight to about 30 units per kg of body weight.

The present application relates to a single-point radial artery wave-based cuffless blood pressure measurement apparatus and a wearable device. The apparatus comprises: a pulse sensor, an analog-to-digital conversion unit, a micro-processing control unit, and a terminal device. The pulse sensor acquires a single-point pulse wave signal of a human radial artery; the analog-to-digital conversion unit performs analog-to-digital conversion on the single-point pulse wave signal to obtain a single-point pulse wave digital signal; the micro-processing control unit receives the single-point pulse wave digital signal for processing, and analyzes the single-point pulse wave digital signal by means of a cuffless blood pressure measurement model to resolve a human blood pressure value; and the terminal device is used for performing AI analysis, data display, waveform display, health report output and / or early warning and prompting on continuous dynamic changes in the single-point pulse wave digital signal and a blood pressure value. The present application achieves the continuous measurement of pulse waves, human pulse monitoring and non-invasive cuffless continuous blood pressure monitoring, effectively improves the early diagnosis of hypertensive diseases, and reduces mortality from hypertensive diseases.

The invention discloses a coronary intervention postoperative radial artery compression hemostat, relates to the technical field of hemostat equipment, and provides the following scheme that the coronary intervention postoperative radial artery compression hemostat comprises a radial artery compression binding belt assembly, and a wrist lining plate assembly is embedded and fixed to the surface of the bottom of the radial artery compression binding belt assembly; and two skin compressing breathable assemblies are embedded and fixed on the surface of the bottom of the wrist lining plate assembly. According to the technical scheme, the radial artery compression binding belt assembly is used for conducting compression hemostasis on the radial artery of the wrist, the effect of compressing the radial artery at the far end is achieved, meanwhile, the wrist lining plate assembly and the skin ventilation assembly are inlaid in the bottom of the binding belt assembly, and the bottom of the wrist is supported through the wrist lining plate; in addition, by means of the combination of a servo motor, a paddle and an electric heating plate, cold and warm air flow ventilation can be achieved for the skin of the pressed area in the pressing environment, and the skin of the pressed area is prevented from being pruritus.

The invention relates to the technical field of medical supplies, in particular to a disposable rotary buckle type radial artery compressor which comprises a soft radial artery compression belt, the two ends of the radial artery compression belt are connected through a hard arc-shaped piece to form a ring, a rotary buckle installation circular truncated cone is fixedly arranged on the hard arc-shaped piece, and a rotary buckle is arranged on the rotary buckle installation circular truncated cone. A rotary buckle is arranged on the rotary buckle mounting round table, the two ends of the outer side of the radial artery compression belt are in traction connection with the rotary buckle through a plurality of tightening lines, a first silica gel pad is fixedly arranged at the bottom of the hard arc-shaped piece, and a second silica gel pad is fixedly arranged on the inner side of the radial artery compression belt. The radial artery compression belt has the following advantages that the manufacturing cost is low, wearing and taking off are convenient, the tightness of the radial artery compression belt can be conveniently adjusted through the rotatable spinning buckle, the structural design is reasonable, and the comfort and the fixing and anti-skid effects can be effectively improved through the design of the first silica gel pad and the second silica gel pad; good popularization prospects and medical commercial values are realized in the field of radial artery compression.

The invention discloses a thin, thick, smooth and astringent pulse condition presentation device, which belongs to the field of medical teaching equipment, and is characterized by comprising a liquid storage tank, a pump body, a bionic blood vessel, a bionic arm, bionic blood and a pipeline, the plurality of liquid storage tanks are respectively used for containing bionic blood and cleaning liquid which are made of different materials; each liquid storage tank is provided with a liquid inlet pipe and a liquid outlet pipe, and the pump body extracts bionic blood through the liquid outlet pipe; an outlet of the pump body is connected with the proximal end of the bionic blood vessel through a pipeline, and blood is pumped into the bionic blood vessel through the pump body; the telecentric end of the bionic blood vessel is connected with the liquid inlet pipe of each container; the bionic blood vessel is located at the radial artery of the bionic arm and simulates the pulses of three acupuncture points of Cun, Guan and Chi on the radial artery of the arm; sand grains or particles made of other materials are contained in the liquid storage tank showing the astringent feeling; and a stirrer is arranged on the liquid storage tank which shows astringent feeling. Compared with the prior art, thin, thick, smooth and astringent pulse feeling can be presented.

The invention relates to the field of non-invasive monitoring, and particularly provides a method for evaluating vascular elasticity through radial artery pulse waves. The method comprises the following steps that 1, radial artery pulse waves are obtained; step 2, preprocessing the radial artery pulse wave to obtain an average pulse period; 3, calculating a dominant wave angle based on the average pulse period; step 4, calculating pulse duration based on the average pulse period; step 5, calculating rise time based on the average pulse cycle; step 6, calculating a main wave amplitude based on the average pulse period; step 7, calculating a waveform area based on the average pulse period; and 8, establishing an evaluation model, inputting the dominant wave angle, the pulse duration, the rise time, the dominant wave amplitude and the waveform area into the evaluation model, and outputting a vascular elasticity predicted value by the evaluation model. According to the method, the accuracy of predicting the vascular elasticity is high, and the cost is low.

The present invention is a method for adjusting a pulse wave measurement device which can be worn on a wrist of a user, the pulse wave measurement device comprising: a pulse wave sensor which has a strain gauge and acquires a pulse wave by measuring a pulse of a radial artery; a pressing member that presses the pulse wave sensor toward a radial artery; and an output unit that outputs a measurement value of the pulse wave sensor as a digital signal, the adjustment method comprising the steps of: when the pulse wave measurement device is worn on a wrist of a user, acquiring a pulse wave by the pulse wave sensor and outputting the acquired measurement value as a digital signal; a comparison unit that compares a voltage level of the digital signal with a range preset with respect to a maximum output level of the output unit; and adjusting or instructing a pressing force applied to the pulse wave sensor when the voltage level of the digital signal is outside the preset range.

The present invention relates to the technical field of non-invasive radial artery visualization devices, and in particular to a device for non-invasive visualization of the blood flow, curvature and diameter of the radial artery. The technical solution includes: a chassis, in which an OCT scanner and a fixing sleeve for fixing the arm are installed, and an imaging auxiliary component installed inside the chassis, and the imaging auxiliary component drives the OCT scanner to move synchronously with the fixing sleeve when the fixing sleeve moves. The present invention uses the fixing sleeve to assist in fixing the hand, and through the imaging auxiliary component, when the hand moves, the moving hand can drive the OCT scanner to move synchronously, so that the OCT scanner and the arm remain relatively still, preventing image blur or distortion, and effectively improving the quality of imaging.

The utility model discloses a direct-viewing pressure feedback type radial artery compressor, and belongs to the field of medical instruments. A direct-view pressure feedback type radial artery compressor comprises a fixing plate, a pressure feedback device and a pressure feedback device. The bandage is arranged at one end of the fixing plate and binds the fixing plate to the arm of the patient; the direct-viewing pressure feedback type radial artery compressor further comprises a pressure applying piece and a pressure feedback piece, wherein the pressure applying piece is movably arranged on the fixing plate; the driving group is arranged on the fixed plate and is used for driving the pressure applying piece to move; the air bag is arranged on the pressure applying piece, located at the lower end of the pressure applying piece and abutted against the arm of the patient; the pressure indicating piece is arranged on the pressure applying piece in an up-down sliding manner; an air hole communicated with the air bag is formed in the pressure applying piece; the pressure indicating piece is arranged in the air hole in an up-down sliding mode. The direct-view pressure feedback type radial artery compressor has the beneficial effect that the direct-view pressure feedback type radial artery compressor with the indication function is provided.