24 results about "Venous Pressures" patented technology

The invention discloses a blood filter early warning method based on multi-parameter coupling and a blood filter, and aims to solve the problems of lagging and high false alarm rate of the existing single parameter threshold alarm. The method comprises the following steps: acquiring time sequence data of at least two monitoring parameters such as transmembrane pressure and venous pressure in real time; constructing a risk state vector based on the sequential data; calculating a risk covariance matrix of the vector in a set time window so as to quantify a collaborative relationship of variation trends among parameters; performing matching degree comparison on the matrix and a pre-stored standard fault feature matrix; and generating and outputting early warning information at least indicating one equipment abnormal mode based on the comparison result. By analyzing a multi-parameter dynamic cooperative relationship instead of a single parameter absolute value, early warning and intelligent preliminary diagnosis of filter blood coagulation, pipeline abnormity and other faults are realized, and the timeliness, accuracy and clinical decision support capability of alarm are remarkably improved.

The present application relates to the technical field of blood monitoring, in particular to a vascular health assessment and intelligent nursing system for hemodialysis patients. The degree of venous reflux obstruction is determined based on the change trend and degree of venous pressure data within each dialysis period, and the degree of inconsistency between the change trends of venous pressure data and transmembrane pressure data. The degree of arterial supply obstruction is determined based on the change trend and degree of arterial pressure data within each dialysis period. The suspected internal fistula obstruction period is determined based on the change trend of the degree of venous reflux obstruction and the degree of arterial supply obstruction. The nursing intervention prompting degree of the patient to be tested is determined based on the relationship between the blood flow data and arterial pressure data of each dialysis stage of the patient to be tested within the suspected internal fistula obstruction period, and the blood flow data of the non-dialysis stage. The internal fistula nursing scheme is determined. The present application realizes early warning of internal fistula dysfunction based on the change of venous and arterial pressure of the blood circulation loop during dialysis.

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.

The circulation assist devices disclosed herein can be used, for example, in methods of decreasing venous pressure in the Fontan circulation. The devices can include an inlet, an outlet, a stator, a rotor, and an impeller driven by rotation of the rotor. In some embodiments, the impeller blade (or blades) can at least partially define a central lumen extending through the device. The device can be coupled to the inferior vena cava and the pulmonary artery. Rotating the impeller blade(s) increases blood velocity through the lumen and causes the outlet pressure to be higher than the inlet pressure. The impeller can be configured such that, when it is stationary, the forward static pressure drop between the inlet and the outlet is minimized. That is, the forward static pressure drop of the device approximates the pressure drop between the inferior vena cava and central pulmonary artery of the unassisted Fontan circulation.

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 relates to a peripheral venous pressure monitoring device which comprises a hose (1) and an infusion nipple (2) arranged at the bottom end of the hose (1) and used for being connected with an indwelling needle, a closed normal saline storage portion (3) is arranged in the hose (1), and scales (4) are arranged on the side wall, located below the normal saline storage portion (3), of the hose (1). And the hose (1) is provided with a telescopic turning part (10) below the scales (4). Compared with the prior art, the peripheral venous pressure monitoring device provided by the utility model is convenient for medical staff to operate, and is convenient to carry and operate. When the disposable puncture needle is used, puncture operation is not needed, and pain of a patient is relieved. The pre-sealed normal saline also reduces the possibility of contamination during operation. And the bent part of the hose can be effectively prevented from being blocked, and data are more reliable and easy to obtain.

The invention relates to the technical field of emergency infusion equipment, in particular to an infusion bottle infusion device and system, and aims to solve the problems that a patient needs to hold an infusion bottle or use a movable infusion support during infusion, inconvenience is caused, and safety risks such as blood backflow and falling down are caused. The device comprises a drip cup with an elastic diaphragm and a big arm fixing assembly, wherein the fixing assembly comprises a fixing belt, an electrical box and a fixing frame, and a micro air pump, an air pressure valve, a control chip and a corresponding sensor are arranged in the electrical box; the system processes sensor data through an algorithm and adjusts the air pressure of an air chamber, so that the liquid outlet pressure of a vein needle is not lower than the sum of the venous pressure of a patient and the safety margin all the time, and meanwhile, the dripping speed is kept stable. The infusion apparatus is portable, light, suitable for narrow spaces such as toilets, capable of preventing blood backflow, accurate in dripping speed and suitable for emergency treatment and common ward scenes, and the moving freedom degree of a patient and infusion safety are improved.

Apparatus and methods are described including reducing cardiac preload of a subject by partially occluding a vena cava of the subject at an infra-renal location. One or more physiological parameters of the subject are monitored, the one or more physiological parameters including lower body venous pressure, central venous pressure, central venous blood flow, renal venous pressure, cardiac diameter, cardiac volume, arterial pressure, and / or arterial blood flow. An extent to which the vena cava is occluded at the infra-renal location is modulated, responsively to the one or more physiological parameters. Other applications are also described.

A monitoring system comprises sensors adapted to be worn by a user, and, a processor linked with the sensor. The processor receives sensor data and processes this data to determine user posture data including data indicative of vertical distance between level of the user's heart and ankle. Based on the posture data together with a value for degree of user chronic venous insufficiency and / or blood density, generate an estimate of user static venous pressure while the user is static, without calf muscle pump activity. The processor also processes the sensor data to determine if there is calf muscle pump activity, and generates an estimate of user active venous pressure according to the static venous pressure estimate, rate of calf muscle activity, and a value for degree of user chronic venous insufficiency. The processor may generate the venous pressure estimate in real time, and may control an NMES device accordingly.

The utility model discloses an extracorporeal circulation blood path for hemodialysis and blood perfusion, which belongs to the technical field of medical instruments and comprises an arterial blood path and a venous blood path, and the arterial blood path comprises an aorta tube, a pump tube, an arterial pot inlet tube, an arterial pot outlet tube and an arterial pressure monitoring tube which are arranged along the flowing direction of arterial blood; the venous blood path comprises a venous pot inlet pipe, a venous pot outlet pipe, a hemodialyzer pipe and a venous pressure monitor which are arranged in the flowing direction of venous blood. The hemoperfusion device blood path comprises an artery connecting pipe, a vein connecting pipe, a waste liquid drainage pipe, an arteriovenous circulation pipe and a waste liquid bag connecting pipe. By means of the mode, connection needed by blood perfusion and connection needed by other blood purification modes (such as hemodialysis) are integrated together, medical staff do not need to splice various complex independent pipelines during operation, the operation process is simplified, and the hemodialysis efficiency is improved.

A monitoring system comprises sensors adapted to be worn by a user, and, a processor linked with the sensor. The processor receives sensor data and processes this data to determine user posture data including data indicative of vertical distance between level of the user's heart and ankle. Based on the posture data together with a value for degree of user chronic venous insufficiency and / or blood density, generate an estimate of user static venous pressure while the user is static, without calf muscle pump activity. The processor also processes the sensor data to determine if there is calf muscle pump activity, and generates an estimate of user active venous pressure according to the static venous pressure estimate, rate of calf muscle activity, and a value for degree of user chronic venous insufficiency. The processor may generate the venous pressure estimate in real time, and may control an NMES device accordingly.

The invention provides hemodialysis equipment and method for the nephrology department, and the method comprises the steps: synchronously obtaining an actual value of the rotating speed of a blood pump and sensor measured values of arterial pressure and venous pressure, inputting the actual value of the rotating speed of the blood pump into a pre-built digital twin model, and obtaining corresponding theoretical values of the arterial pressure and the venous pressure; respectively determining an arterial pressure residual error sequence of a sensor measured value of the arterial pressure and a corresponding theoretical value and a venous pressure residual error sequence of a sensor measured value of the venous pressure and a corresponding theoretical value, and carrying out time domain feature extraction on the arterial pressure residual error sequence and the venous pressure residual error sequence; and obtaining corresponding mean value features and trend slope features, and further performing fault judgment on the hemodialysis equipment according to the corresponding mean value features and trend slope features. By means of the scheme, fault detection can be conducted on the hemodialysis equipment according to the cooperative change relation between the arterial pressure and the venous pressure.

The invention discloses a fundus venous pressure monitoring type noninvasive intracranial pressure measuring device, and relates to the technical field of noninvasive intracranial pressure measurement. Comprising a fundus venous pressure measuring mechanism, the fundus venous pressure measuring mechanism comprises an ultrasonic probe, a liquid bag is installed at the detection end of the ultrasonic probe, medical gauze is arranged on the surface, away from the ultrasonic probe, of the liquid bag, and a pressure sensor is arranged in the liquid bag; the detection module comprises an ultrasonic host, a pressure detector and a display unit, and the pressure sensor is electrically connected with the pressure detector. The fundus venous pressure measuring mechanism is arranged, the liquid bag is arranged at the end of the ultrasonic probe, the pressure sensor is arranged in the ultrasonic probe, and the pressure detector is externally connected, so that the pressure in the liquid bag can be read in real time; in the implementation process, when it is guaranteed that the initial pressure of the liquid bag is equal to the initial intraocular pressure, the ultrasonic probe is used for vertically applying pressure from the exterior of the eyeball of a patient with high intracranial pressure till the fundus vein is just pressed and closed through ultrasonic observation, and the displayed internal pressure of the liquid bag is the intracranial pressure at the moment.

The invention provides a simulation device for hemodialysis training, and relates to the technical field of training instruments. The simulation device for hemodialysis training comprises a rack, the top of the rack is fixedly connected with a fixing frame, one side of the outer surface of the fixing frame is fixedly connected with a blood simulation storage barrel, one side of the blood simulation storage barrel is provided with an artery pot, and the artery pot is fixedly connected with the fixing frame; a pumping assembly is installed between the blood simulation storage barrel and the artery pot. By arranging the blood coagulation simulation system composed of the quantitative injection assembly, the static mixer and the vibration type viscosity sensor, the physical characteristic that the liquid viscosity is gradually increased in the blood coagulation process can be safely and accurately simulated, and therefore the real pathophysiological changes that the venous pressure is slowly increased and the arterial pressure is reduced are reproduced in training. The design solves the problem that an existing training mode cannot provide a core pain point of dynamic and vivid complication simulation under the risk-free condition.

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.

The invention provides a hemodialysis device and a corresponding detection method capable of detecting poor installation of a fluid infusion pipeline to a fluid infusion clamp. One embodiment of the present invention relates to a hemodialysis device (100) comprising a venous pressure sensor (112f) for detecting the gas pressure within a venous cavity (112b) as a venous pressure, and a fluid infusion clip (140b) being in a closed state after a blood circuit (110) and a fluid infusion line (140) are filled with a pre-filling fluid. When the flow path on the downstream side of the venous cavity (112b) is closed, a determination unit (162) determines whether or not there is a poor attachment of the fluid infusion line (140) to the fluid infusion clip (140b) on the basis of a change in venous pressure caused by rotation of the fluid infusion pump (140a).

The invention belongs to the technical field of extracorporeal circulation control, and discloses an artificial heart-lung machine multi-pump cooperative control system which comprises a main circulation loop, an auxiliary recovery loop, a pump set, a parameter acquisition unit and a control unit. The control unit is used for determining the target single-time feedback amount and controlling the recycling pump to perform feedback for several times according to the perfusion flow, the drainage flow, the venous pressure, the blood storage liquid level and the recycling liquid level, collecting parameters again after feedback, judging feedback conditions again, and entering a limited safety mode when collection is abnormal. The system is used for multi-pump cooperative control in the extracorporeal circulation process of the artificial heart-lung machine.

The present invention provides a formulation for use in the treatment of systemic and ophthalmic diseases associated with elevated retinal venous pressure. [Solution] A formulation containing at least one folic acid (folate) is provided.

The invention discloses a similar text retrieval method and system, and relates to the technical field of data processing and information retrieval, and the similar text retrieval method comprises the following steps: analyzing artery invasive blood pressure and cuff blood pressure readings in the same time window from a diagnosis and treatment text fragment, calculating fragment-level dynamic cuff pressure and pulse pressure anomalous quantity, and calculating the fragment-level dynamic cuff pressure and pulse pressure anomalous quantity; carrying out statistics and aggregation to generate a patient-level dynamic cuff pressure and pulse pressure abnormal consistency index; basic text similarity of the target test condition and the diagnosis and treatment text is calculated, constraint processing is conducted on the basic text similarity through the consistency index to obtain a retrieval score, and finally the patients are sorted according to the score. According to the method, the virtual height of text evidence caused by dynamic cuff pressure and pulse pressure anomalous due to measurement link artifacts can be recognized and inhibited, candidate error recall is reduced, and the accuracy and reliability of screening and sorting are 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 invention provides a hemodialysis device and a detection method, wherein the hemodialysis device can detect that a fluid infusion pipeline is reversely installed on the front side and the rear side of a fluid infusion pump. A hemodialysis device (100) according to the present disclosure includes a venous pressure sensor (112f), and measures the gas pressure in a venous cavity (112b) as venous pressure. In a state in which a flow path upstream of a portion of the fluid replacement line (140) attached to the fluid replacement pump (140a) is open to the dialysate circuit (130), a flow path downstream of the portion of the fluid replacement line (140) attached to the fluid replacement pump (140a) is open to the blood circuit (110), and an arbitrary location of the flow path downstream of the venous lumen (112b) is blocked, the fluid replacement line (140) is closed to the dialysate circuit (130), and the fluid replacement pump (140a) is closed to the blood circuit (110). The control device (160) causes the determination unit to determine, on the basis of variations in venous pressure caused by rotation of the fluid infusion pump (140a), whether or not the fluid infusion line (140) is mounted upside down to the front and rear of the fluid infusion pump (140a).

Described are systems, methods, and devices relating to normothermic extracorporeal support of an organ, tissue, or bioengineered graft comprising cross-circulation (XC) perfusion for prolonged periods (days to weeks) via an XC perfusion circuit in connection with an extracorporeal host (e.g., animal, patient, organ transplant recipient) are disclosed. The XC perfusion circuit comprises auto-regulation of blood flow based on the trans-organ blood pressure difference between arterial and venous pressure. Recipient support enabled 36 h of normothermic perfusion that maintained healthy lungs with no significant changes in physiologic parameters and allowed for the recovery of injured lungs. Extended support enabled multiscale therapeutic interventions in all extracorporeal lungs. Lungs exceeded transplantation criteria.

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.