9 results about "Venous pressure" patented technology

A TIPS (Transient Invasive Stent) for flow restriction includes a bare stent with a fixed stent connected to one side. A flow-restricting stent is disposed inside the fixed stent. The flow-restricting stent has a conical structure, with the larger end of the conical stent connected to the inner side of the fixed stent, and the smaller end of the conical stent facing the other end of the fixed stent. A drug-eluting layer is disposed inside the fixed stent. In this application, the flow-restricting stent is a streamlined cone shape with a diameter that gradually decreases from one end to the other. This conical design reduces blood flow turbulence and recirculation, lowers the risk of thrombosis, maintains high stent patency, and more rationally balances the relationship between portal hypertension and hepatic encephalopathy, thus improving patients' quality of life. In some patients, it can more stably maintain the postoperative portal vein pressure gradient within the safe range of 10-12 mmHg. The conical structure achieves a smooth pressure gradient change through a gradually decreasing diameter, which is more in line with the principles of fluid dynamics and has high clinical value in preventing hepatic encephalopathy.

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.

In a method of non-invasively obtaining information on intracranial pressure of a patient, during a first time period, a plurality of facial veins of the patient are occluded by applying external pressure to each of the plurality of facial veins, which emanate from the periorbital region. During the first time period, external pressure is applied to a designated vein (17) connected to an intracranial vessel at a location within the region, upstream of the occlusion of the plurality of facial veins. Changes in the geometry of the designated vein (17) caused by the external pressure are observed to obtain at least one first value related to venous pressure in the designated vein (17). The at least one first value is processed to obtain information on intracranial pressure. The method enables measuring pressure values that are closely related to intracranial pressure without the need for measurements within the intracranial space. Instead, an occlusion establishes a direct pressure communication between the intracranial vessel and the designated vein, which can be easily examined outside the head.

This invention provides a bedside hemofiltration method and system for elderly critically ill patients, comprising: analyzing the correlation between transmembrane pressure changes and venous pressure fluctuations under the control of vascular access type and puncture angle, based on a dynamic trend description, and simultaneously evaluating the corrective effect of signal compensation mechanisms on data accuracy to obtain a set of parameter correlation strengths; if some values ​​in the parameter correlation strength set exceed a preset threshold, then combining monitoring data on access infection risk and fluctuations in signal transmission distance, determining whether there is a chain reaction caused by access abnormality, and obtaining an abnormal chain reaction identifier; for the abnormal chain reaction identifier, determining the degree of danger of the abnormality to the overall system by analyzing the matching degree between access establishment time and attenuation frequency range, and obtaining a danger level classification result.

The utility model discloses a surgical room arteriovenous folding fixed bolster is provided with a T type sliding slot in base, four sliding blocks are connected with T type sliding slot sliding respectively, and the folding support frame is set up on the sliding block one to one correspondence, and the bottom of folding support frame is rotatably connected with the first connecting sleeve surface of sliding block through the damping pivot, and the top of folding support frame is provided with the platform, and the upper surface of platform is provided with the pipeline fixed assembly, the utility model discloses reasonable structure, can properly classify and fix deep vein and two road venous transfusion pipeline and arteriovenous two road pressure sensor four road pipelines, can prevent the pipeline from slipping through the pipeline fixed assembly, and simultaneously through the folding support frame can adjust the position of two road pressure sensor at any time along with the change of the body position in operation, guarantees that pressure sensor and heart are in the same horizontal line, thereby ensures the accuracy of arteriovenous pressure monitoring in operation, guarantees the life safety of patient.

Provided is a coronary blood flow measurement device capable of acquiring significant information for determination of ischemic heart disease caused by stenosis or the like in a coronary blood vessel on the basis of measurement of a blood flow (coronary blood flow) in a blood vessel (coronary blood vessel) of a heart. This coronary blood flow measurement device (10) includes: a CFR acquisition means (12) for acquiring a calculated value of coronary blood flow reserve (CFR); and a cCFR calculation means (14) for obtaining a blood pressure correction CFR (cCFR) by converting the calculated value of the coronary blood flow reserve (CFR) acquired by the CFR acquisition means into a value under a condition of an arbitrary specific value (ΔPs) of an arteriovenous pressure difference (ΔP(a-v)) by using a linear relationship between a maximum hyperemia coronary blood flow (Q(hyp.)) and the arteriovenous pressure difference (ΔP(a-v)).

The invention relates to the field of biomedical engineering technology and information processing, and discloses a trend prediction method and system based on multi-physiological signal fusion, a terminal and a storage medium, and the method comprises the steps: obtaining a venous pressure analog signal collected by a sensor or a radar, and carrying out the automatic calibration and digital processing of the venous pressure analog signal, obtaining central venous pressure data; processing the central venous pressure data based on a waveform feature automatic deconstruction algorithm to obtain hemodynamic feature parameters; and predicting the hemodynamic characteristic parameters according to a preset clinical knowledge rule to obtain clinical decision prompt information. According to the central venous pressure monitoring system and method, intelligent analysis and fusion prediction are conducted on the continuously-collected venous pressure signals, hierarchical clinical decision prompt information is obtained, and the automation, continuity and clinical decision support capacity of central venous pressure monitoring are greatly improved.

This invention relates to the field of medical devices and discloses a fiber optic sensing-based early warning device and method for thrombosis in the lumen of a hemodialysis catheter. The fiber optic sensing-based early warning device for thrombosis in the lumen of a hemodialysis catheter includes a catheter body, a fiber optic sensing component, a data transmission module, a signal processing module, and an early warning module. The catheter body has an arterial lumen, a venous lumen, and a central mediastinum located between the arterial and venous lumen. This invention, by at least partially disposing the fiber optic sensing component within the central mediastinum of the hemodialysis catheter, makes the central mediastinum both a separating structure between the arterial and venous lumen and a structural carrier for converting venous pressure changes into fiber optic strain signals. The central mediastinum can generate corresponding micro-strains, which are sensed by the fiber optic sensing component, enabling continuous monitoring of the thrombosis formation trend within the hemodialysis catheter lumen.

The application discloses an extracorporeal organ perfusion system, which comprises a perfusion main loop and an inflammation factor removing sub-loop; the perfusion main loop comprises a sterile organ storage container, a venous blood gas monitoring device, a venous pressure monitoring device, a perfusion liquid storage tank, a main loop pump, a heat exchanger, a gas exchanger, a white blood cell filter, a bubble filter, an arterial pressure monitoring device, a flow monitoring device, a temperature monitoring device, an arterial blood gas monitoring device and a biological sensor which are sequentially connected and form a circulation loop; the inflammation factor removing sub-loop comprises a purification sub-loop input pump, an inflammation factor filter, a perfusion exchange liquid storage tank and a purification sub-loop output pump which are sequentially connected; the output end of the purification sub-loop output pump is in communication with the input end of the perfusion liquid storage tank; the application has the advantages that the inflammation factors in the perfusion loop can be effectively removed, the perfusion liquid can be effectively reused, and various physiological parameter indexes in the perfusion process can be monitored and fed back in real time.