15 results about "Arterial perfusion" patented technology

The utility model relates to an adult simulation load device for online calibration of an extracorporeal membrane oxygenation system. The system comprises a left ventricular artery system simulation box, a right atrial vein system simulation box, a resistance device, a V-A ECMO treatment mode artery perfusion cannula, a V-V ECMO treatment mode vein perfusion cannula, a vein drainage cannula, a bottom plate, a right atrial vein system simulation box hydraulic monitoring sensor, a left ventricular artery system simulation box hydraulic monitoring sensor and a manual pressure release valve. And a ball valve pressurizing device and a vertical partition plate. The left ventricular artery system simulation box, the resistance device and the right atrial vein system simulation box are sequentially connected through pipelines. The device is simple in structure, convenient and practical to operate and capable of accurately simulating the blood volume of a patient, the pressure difference between a venous system and an arterial system and the resistance of a blood circulation system when an adult patient adopts a V-A ECMO treatment mode and a V-V ECMO treatment mode respectively, and has practical value; calibration data has clinical guiding significance, the measurement accuracy of key parameters of equipment is effectively guaranteed, and clinical risks are reduced.

This invention belongs to the field of extracorporeal circulation monitoring technology and discloses a multi-parameter linkage monitoring system for an artificial heart-lung machine, including an artificial heart-lung machine circuit, a detection component, an execution component, and a controller. The artificial heart-lung machine circuit includes a venous drainage line, a blood reservoir, a blood pump, a membrane oxygenator, an arterial perfusion line, and a gas supply line. The detection component is used to detect venous pressure, fluid level, pressure before and after the membrane oxygenator, arterial perfusion flow rate, blood oxygen, and gas supply pressure and flow rate. The controller performs time alignment on the detection signals within the same sampling period and, combined with changes in similar detection signals in adjacent sampling periods, distinguishes between insufficient drainage, increased membrane oxygenator resistance, and abnormal gas supply, outputting corresponding deceleration, speed limiting, gas supply adjustment, gas supply switching, pump shutdown, alarm, and lockout control signals. This system is used for linkage monitoring and control of abnormal sources in the extracorporeal circulation circuit.

The present invention relates to a device, system and method for monitoring of peripheral arterial perfusion of a subject. To enable distinguishing between low pulsatility caused by centralization or low cardiac output, the proposed device comprises an input (30) for receiving first detection data of a tissue region of a subject, said first detection data being acquired over time by detecting radiation reflected from and / or transmitted through tissue of the subject, and for receiving second detection data of a skin region of subject, said second detection data being acquired over time by detecting radiation received from said tissue region in response to coherent light being emitted towards said skin region, a PPG unit (32) for deriving a photoplethysmography, PPG, signal from said first detection data, a flow unit (34) for deriving, from said second detection data, a flow signal indicative of a flow of light scattering particles within the skin region, and an evaluation unit (36) for evaluating said PPG signal and said flow signal to obtain information on the peripheral arterial perfusion, wherein the evaluation unit is adapted to determine a state of low vascular compliance and / or a state of low cardiac output based on a combined evaluation of said PPG signal and said flow signal.

An arterial perfusion device for radiation intervention relates to the technical field of medical instruments and comprises a mounting seat, the mounting seat is a rubber seat, the inner side face of the mounting seat is of an arc-shaped structure, a winding drum is fixed to the end of the mounting seat, a guide roller is rotatably connected to an opening of the winding drum, and a winding mechanism is mounted on the inner side of the winding drum. According to the arterial perfusion device for radiation intervention, the situation that blood circulation is affected by too tight constraint or limbs move due to too loose constraint can be avoided, the comfort level and safety of patient treatment are improved, the perfusion angle can be adjusted, wireless remote operation can be achieved, and the arterial perfusion device for radiation intervention is convenient to use. The radiation exposure time of an operator is shortened, the optimal infusion angle can be found, the treatment effect is improved, damage to the infusion tube caused by a traditional fixing mode can be avoided, meanwhile, displacement of the infusion tube is prevented, and accurate conveying of medicine is guaranteed.

The invention relates to the technical field of deep learning, in particular to an extracorporeal circulation data analysis method and system based on deep learning, and the method comprises the following steps: collecting pump rotating speed, pump flow, arterial perfusion pressure, arteriovenous blood oxygen saturation, hemoglobin and lactic acid, carrying out the time alignment, completing the time sequence coding, and forming state characterization; the method comprises the following steps: correcting a state evolution direction by combining a relationship between oxygen delivery and oxygen extraction, introducing a lactic acid change trend to constrain time sequence consistency, constructing a circulating resistance matching perfusion capability according to flow and pressure, continuously correcting a state change direction, and generating an operation state analysis result. Oxygen delivery and oxygen extraction constraints are introduced to correct state evolution, a lactic acid trend is combined to strengthen time sequence consistency, resistance constraints are formed by perfusion pressure and flow, perfusion capacity changes are continuously corrected, and nonlinear state expression stability and overall interpretation coherence are improved.

The invention aims at providing an implantable multifunctional arterial perfusion chemotherapy device and an intelligent adjusting system, and relates to the technical field of medical instruments, through cooperation of a double-port body structure and a plurality of balloon devices, the position of a catheter can be effectively fixed, displacement of the catheter is avoided, and the accuracy of drug delivery is ensured; the intelligent control system accurately adjusts the blood flow rate, the balloon inflation degree and the like, it is ensured that medicine can be evenly and effectively distributed to a tumor area, the medicine effect is maximized, and damage to healthy tissue is reduced; side effects such as medicine leakage and vascular injury are reduced, and the treatment safety is ensured; the external control terminal provides a simple and convenient operation platform for a doctor, helps the doctor to make treatment adjustment through real-time data feedback, and reduces the operation complexity in the treatment process; and the intelligent system automatically generates a personalized treatment scheme according to the physiological reaction of the patient, so that each patient can obtain the most suitable treatment scheme, and the treatment accuracy is further improved.

The invention relates to a magnetic resonance imaging method based on pseudo-continuous arterial spin labeling, a medium and equipment. According to the magnetic resonance imaging method, on the basis of pseudo-continuous artery spin labeling, PCASL sequence parameters are optimized, then a multi-modal structure image is combined with a PCASL image, a heart artery blood perfusion weighted image is generated, and more accurate parameter estimation is obtained. Furthermore, a proper range is selected to optimize the acquisition sequence through parameter fitting, and the processing process of combining the acquired image and the PCASL image is optimized, so that motion artifacts and physiological noise can be effectively inhibited, the signal-to-noise ratio is improved, and accurate parameters can be acquired more quickly and efficiently. The cardiac artery blood perfusion weighted image generated by the method has various clinical applications such as coronary heart disease diagnosis, myocardial infarction evaluation, cardiac surgery evaluation, cardiac rehabilitation evaluation and the like.

The invention relates to the technical field of medicine, and provides an arterial perfusion tube for small animal in-vitro lung perfusion, which comprises a perfusion main tube group, the perfusion main tube group is U-shaped, the output end of the perfusion main tube group is fixedly connected with a conical insertion conical head, the top end of the conical insertion conical head is in the shape of a sharp-free smooth cone, and the top end of the conical insertion conical head is connected with the perfusion main tube group. The perfusion main pipe group is inserted into a pulmonary artery trunk of a mouse or a rat, and a rotating part for steering is arranged at the bottom of the middle end of the perfusion main pipe group; the output end of the first perfusion catheter is communicated with the input end of the main perfusion pipe set, and the input end of the first perfusion catheter is connected with a second perfusion catheter through an air filtering assembly so as to be connected into an external perfusion liquid supply part. The integral U-shaped smooth pipeline structure is adopted, and the device can naturally conform to the thoracic anatomy direction of an experimental animal in the implanting and connecting process, so that the infusion tube implanting process is remarkably simplified, the operation preparation time is shortened, and the dependence on the thoracic anatomy operation skill of an operator is reduced.

The present application relates to a target artery selective labeling method, device, electronic equipment and storage medium, comprising: acquiring a blood vessel positioning image of a target artery; determining a selective excitation pulse according to the blood vessel positioning image; and obtaining a perfusion map of the target artery by labeling according to the selective excitation pulse. The present application selects the position of the artery to be labeled, designs a selective excitation pulse targeting the artery based on a single-channel or multi-channel parallel emission platform, and applies the selective excitation pulse to the labeling section in the artery spin labeling sequence, thereby achieving the effect of selectively labeling a specific artery and obtaining a perfusion map of the specific artery.

This invention relates to the field of medical technology, specifically to a system and method for continuous measurement of arterial wall blood pressure and peripheral perfusion pressure. The system includes a data acquisition device, an angle detection device, a width adjustment device, and a data processing device. In this system, the two puncture needles of the acquisition device are positioned across both sides of the patient's artery. In actual operation, the two puncture needles cross the two sides of the artery. The expansion and contraction of the artery cause displacement of the tissues on both sides, resulting in an angle shift at the other end of the puncture needles. This displacement allows for the processing and acquisition of the patient's perfusion pressure data, providing a simple and effective way to monitor the magnitude of arterial perfusion pressure.

1. Name of the designed product: syringe auxiliary device (arterial perfusion 1). 2. Use of the designed product: auxiliary device for increasing the friction of holding a syringe and facilitating force. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.

An arterial perfusion catheter for radiation intervention relates to the technical field of arterial perfusion and comprises a perfusion catheter body, valves are arranged on the inner side of the perfusion catheter body, the number of the valves on the same section is three, the three valves are arranged in a rotating array mode, and the three valves are arranged in a disc-shaped structure in a natural state. According to the arterial perfusion catheter for radiation intervention, injected liquid medicine can be buffered, so that secondary injury to a patient due to the fact that the liquid medicine injection speed is too high is avoided, the blood backflow phenomenon can be avoided, the use safety is good, and popularization is convenient.

The invention relates to the technical field of arterial perfusion catheters, in particular to a tumor interventional chemotherapy drug injection flow rate adjusting system based on hemodynamic force. In the process that the guide wire head moves to the designated position for drug release, the blood flow resistance parameter of each position is obtained, then the change coefficient of the blood flow resistance at the designated position is obtained, and then the internal blood flow resistance parameter and the collateral blood flow resistance parameter of the tumor target organ are obtained; and evaluating the adjustment reference value of the drug flow rate and early warning the adjustment of the drug flow rate. The blood flow resistance is assessed based on the proportional relation between the blood flow and the blood pressure, then the change of the blood resistance along with the diameter of the blood vessel is analyzed and assessed, the change coefficient is quantified to estimate the internal blood flow resistance and the bypass blood flow resistance in the tumor target organ, and then whether the medicine flow speed is adjusted or not is early warned. The medicine injection effect in the tumor interventional chemotherapy process is improved in an auxiliary manner.

1. Name of the designed product: syringe auxiliary device (arterial perfusion 2). 2. Use of the designed product: auxiliary device for increasing the friction of holding a syringe and facilitating force. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.

This invention relates to the field of medical research based on cadaver specimens, specifically disclosing a method for arterial perfusion of veins from cadaver specimens based on ink and an automated arteriovenous differential colorimetric perfusion reagent. The perfusion reagent includes ink and a base perfusion solution, wherein the base perfusion solution is a latex, gelatin solution, or other base perfusion solution that can pass through the capillary network and does not affect the color-changing effect of the ink. This invention innovatively discovers that the perfusion solution containing ink undergoes a color change as it flows from the artery into the vein. Utilizing this principle, a one-step method for arterial perfusion of veins from cadaver specimens is provided. This method is simple to operate, requiring only one artery puncture and one perfusion solution, and is less likely to cause dilation or deformity of the vein after perfusion. The anatomical field of view is clear, and perfusion can be terminated when the perfusion solution mixture flows out of the vein. After perfusion, the artery and vein exhibit different colors, and the color difference is visually discernible, thus achieving differential display of arteries and veins.