9 results about "Liver perfusion" patented technology

Methods are provided for effectively distinguishing the abilities of a human liver and an extracorporeal liver in an extracorporeal liver perfusion system to extract cholate and, thus, measure relative liver function.

This invention belongs to the field of biomedical technology and provides a high-throughput drug screening system and its usage method for enriching circulating tumor cells (CTCs) in liver cancer. It includes an information processing and control unit; a diseased liver perfusion device comprising an organ chamber containing injection fluid at the bottom, an arterial supply line, an arterial end sensor, an arterial end clamp valve, at least two membrane lungs, a portal vein supply line, a portal vein end clamp valve, and a portal vein end sensor; a CTC enrichment device, which uses erythrocyte lysis to remove erythrocytes and immunomagnetic bead labeling to remove leukocytes, enabling the processing of large volumes of perfusion fluid in a single step to obtain enriched circulating tumor cells; a high-throughput drug screen; and phototubes, arterial end sensors, and portal vein end sensors, each electrically connected to the information processing and control unit. Compared with existing technologies, the high-throughput drug screening system and its usage method of this invention have the advantages of establishing a room-temperature mechanically perfused ex vivo liver cancer model, realizing the processing of large volumes of liquid specimens, and providing automated high-throughput drug screening functionality.

The present application discloses a liver perfusion system, comprising: an organ basin; a first circulatory tubing, comprising a first outflow tube and a first perfusion tube, the first outflow tube being configured for allowing perfusate to flow into the organ basin, and the first perfusion tube being configured for allowing perfusate to flow out from the first outflow tube; a second circulatory tubing, comprising a second outflow tube and a second perfusion tube, the second outflow tube being configured for allowing perfusate to flow into the organ basin, and the second perfusion tube being configured for allowing perfusate to flow out from the second outflow tube; a first tube connector, comprising a first opening, a second opening, and a third opening, the first opening being in communication with the first outflow tube, the second opening being in communication with the first perfusion tube, and the third opening being configured for communicating with a testing apparatus; and a second tube connector, comprising a fourth opening, a fifth opening, and a sixth opening, the fourth opening being in communication with the second outflow tube, the fifth opening being in communication with the second perfusion tube, and the sixth opening being configured for communicating with the testing apparatus. The liver perfusion system of the present application allows workers to easily perform sterility testing.

The invention relates to the technical field of medical equipment control, and discloses a multi-modal perception and controllable execution in-vitro liver perfusion system and a control method, monitoring data of at least two heterogeneous modals are collected and preprocessed, regulation and control parameters and uncertainty evaluation are reasoned and output through an edge intelligent terminal by using a first machine learning model, and the in-vitro liver perfusion system with the multi-modal perception and controllable execution function is obtained. And the data are uploaded to the cloud for further processing. The cloud generates a regulation result through a second machine learning model, adjusts the confidence of the cloud model based on the communication quality, and generates a to-be-executed regulation instruction in combination with local and cloud results, and when the network quality is lower than a threshold value, the system adopts a conservative regulation instruction to ensure the safety of the perfusion process; and the executability of the regulation and control instruction is ensured through security constraint verification, and manual intervention information is recorded. The in-vitro liver perfusion method can effectively cope with emergencies such as network instability and cloud failure while ensuring stable execution of the in-vitro liver perfusion process, and has relatively high robustness and reliability.

Methods are provided for effectively distinguishing the abilities of a human liver and an extracorporeal liver in an extracorporeal liver perfusion system to extract cholate and, thus, measure relative liver function.

The invention provides an in-vitro liver perfusion function evaluation method, device and medium based on hyperspectral imaging, a hyperspectral multi-index quantitative model of the liver in the normal-temperature mechanical perfusion process is established, and mapping calculation of oxygen saturation, hemoglobin, perfusion, moisture and hemoglobin index physiological parameters is achieved; spectral features are directly converted into functional parameters with clear physiological significance through a wave band absorption difference ratio and an integral reflection algorithm; a multi-index fusion model (LVI) is provided, and quantitative coupling between image parameters and metabolic parameters (lactic acid and pH) is achieved; a dynamic time sequence evaluation mechanism is formed, the activity change of the liver tissue can be tracked noninvasively, the function recovery trend can be predicted, and evaluation is provided for liver perfusion maintenance and subsequent liver transplantation.

Methods are provided for effectively distinguishing the abilities of a human liver and an extracorporeal liver in an extracorporeal liver perfusion system to extract cholate and, thus, measure relative liver function.

The invention relates to the technical field of biology, in particular to a mouse liver cell extraction and cryopreservation method. Comprising the following steps: performing liver perfusion and digestion: performing inferior vena cava intubation on a mouse corpse, cutting open vena cava, clamping superior vena cava, performing perfusion with perfusate for 6-8 minutes, and performing circulating perfusion with digestive juice for 10-15 minutes; separating and purifying the cells: taking out the liver, tearing a liver membrane in precooling termination digestion liquid at 3-5 DEG C, filtering by a screen, collecting filtrate, performing primary centrifugation on the filtrate, supplementing a complete culture medium, then performing secondary centrifugation, collecting cell precipitates, washing with the complete culture medium for 2-3 times, performing centrifugation again, and retaining the cell precipitates at the bottom to obtain purified parenchymal liver cells; and resuspending the purified parenchymal hepatic cells by using a precooled cryopreservation solution until the final concentration is (1-2) * 10 < 7 > cells / mL, sub-packaging and cryopreserving. The method is stable in operation, high in cell obtaining rate, good in activity and high in recovery rate after cryopreservation.

According to the remote monitoring system and method for the in-vitro liver perfusion equipment, medical staff can move and operate a tablet personal computer within a certain range in an operating room without constraint of the physical position of an equipment host, a patient and the equipment can be taken into consideration at the same time, it can be guaranteed that the equipment is normally controlled in a small space or in a multi-person operation scene, and the operation efficiency is improved. The flexibility of the working process is improved; through the Internet cloud, remote specialists can observe the whole perfusion process in real time as if they are personally on site, so that instant remote guidance is provided for evaluation of marginal donor liver and processing of complex conditions, and the utilization efficiency and the treatment level of medical resources are improved; the dual network architecture provides communication redundancy to a certain extent. Based on the alarm pushing function of the cloud platform, 7 * 24-hour state monitoring is realized, even if field personnel leave temporarily, key alarms can be known in time through mobile phones, and the safety is greatly improved.