10 results about "Arterial perfusion" patented technology

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 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.

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.

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.