44 results about "Venous pressure" 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 invention provides a portal vein pressure adjusting support and a production method thereof, and belongs to the technical field of medical instruments.The adjusting support comprises a cylindrical support body, the support body is provided with a first section and a second section which are integrally arranged, and the side wall of the first section is provided with a film-shaped component used for sealing and isolating the outer side and an inner cavity of the support body; a pressure adjusting valve is arranged in an inner cavity of the first section, is opened for blood flow to pass through when the pressure in the portal vein is larger than a set threshold value, and is closed to cut off the blood flow when the pressure in the portal vein is smaller than the set threshold value; the stent can automatically adjust the opening and closing state of the shunt channel according to the portal vein real-time pressure, and ineffective shunt is reduced to the maximum extent while it is ensured that the portal vein pressure is reduced to a safe range, so that the occurrence risk of hepatic encephalopathy is reduced.

Dialyzer systems can integrate the technologies and functions of various blood therapy systems in a significantly integrated manner. For example, this disclosure describes a dialyzer system including a magnetically driven and magnetically levitated pump rotor integrated into the dialyzer. Such a dialyzer can be used with a treatment module including a pump drive unit that generates a magnetic field. In some embodiments, the dialyzer includes a pressure transducer chamber with a flexible membrane, and a corresponding pressure transducer of the treatment module can engage with the flexible membrane to detect arterial and / or venous pressure.

A monitoring device of a dialysis machine and a method for detecting a venous needle disconnection via venous pressure monitoring based on a threshold value setting. The device includes a button, preferably arranged on a screen of the dialysis machine. The button is configured, upon actuation, to set a lower threshold value and an upper threshold value depending on an actual pressure and to detect an incremental decrease in the venous pressure.

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.

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.

The invention provides an image-clinical characterization-combined multi-endpoint prognosis evaluation method for transjugular vein intrahepatic portal vein shunt, which comprises the following steps of: constructing a few-label portal vein segmentation module to obtain a preoperative CT portal vein label of a full-dose patient, and extracting deep learning features and radiomics features of the region; establishing a multi-modal interactive representation learning module for implementation, and performing cross-modal fusion with clinical features to form unified representation; and designing a multi-endpoint prognosis prediction module, inputting the data to a plurality of prognosis task decoders for postoperative survival, portal vein pressure gradient, hepatic encephalopathy prediction and the like, and adopting a multi-task learning optimization model to obtain a postoperative multi-endpoint prognosis evaluation result. According to the method, efficient fusion and multi-endpoint prognosis prediction of images and clinical information can be realized under limited labeling, clinical doctors can be assisted in preoperative patient screening and treatment scheme making, and the method has good clinical application value.

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.

An apparatus for measuring a jugular vein pressure waveform comprises a rotation sensor (102) configured to produce a measurement signal when being against a skin of an individual and in a movement sensing relation with a jugular vein (104) of the individual. The apparatus comprises a processing system (101) configured to receive the measurement signal and produce a waveform of a motion of the skin in a direction perpendicular to the skin based on the measurement signal indicative of rotation of the rotation sensor, where the waveform of the motion of the skin is indicative of the jugular vein pressure waveform. The rotation sensor that measures rotation is more insensitive to movements not related to variation of the jugular vein pressure than for example an acceleration sensor.

The device for measuring jugular vein pressure waveforms includes a rotation sensor (102) configured to generate a measurement signal when it is in contact with the individual's skin and in a relationship with the individual's jugular vein (104) that detects movement. [Solution] The device includes a processing system (101) configured to receive a measurement signal and generate a waveform of skin movement perpendicular to the skin based on the measurement signal indicating rotation of a rotation sensor, wherein the waveform of skin movement indicates a jugular vein pressure waveform. The rotation sensor that measures rotation does not respond to movements unrelated to fluctuations in jugular vein pressure, for example, an acceleration sensor.

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.

A determination method, an apparatus, an electronic device, and a storage medium for a postoperative portal vein pressure are provided, wherein the determination includes obtaining preoperative imaging data and measurement data of a patient; and inputting the preoperative imaging data and the measurement data of the patient into a portal vein geometric multi-scale model to obtain a postoperative portal vein pressure of the patient output by the portal vein geometric multi-scale model, wherein the portal vein geometric multi-scale model is formed by coupling a three-dimensional model of a portal vein system and a zero-dimensional model of a liver blood circulation system of the patient.

Dialyzer systems can integrate the technologies and functions of various blood therapy systems in a significantly integrated manner. For example, this disclosure describes a dialyzer system including a magnetically driven and magnetically levitated pump rotor integrated into the dialyzer. Such a dialyzer can be used with a treatment module including a pump drive unit that generates a magnetic field. In some embodiments, the dialyzer includes a pressure transducer chamber with a flexible membrane, and a corresponding pressure transducer of the treatment module can engage with the flexible membrane to detect arterial and / or venous pressure.

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.

Dialyzer systems can integrate the technologies and functions of various blood therapy systems in a significantly integrated manner. For example, this disclosure describes a dialyzer system including a magnetically driven and magnetically levitated pump rotor integrated into the dialyzer. Such a dialyzer can be used with a treatment module including a pump drive unit that generates a magnetic field. In some embodiments, the dialyzer includes a pressure transducer chamber with a flexible membrane, and a corresponding pressure transducer of the treatment module can engage with the flexible membrane to detect arterial and / or venous pressure.

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.

An apparatus for measuring a jugular vein pressure waveform comprises a rotation sensor (102) configured to produce a measurement signal when being against a skin of an individual and in a movement sensing relation with a jugular vein (104) of the individual. The apparatus comprises a processing system (101) configured to receive the measurement signal and produce a waveform of a motion of the skin in a direction perpendicular to the skin based on the measurement signal indicative of rotation of the rotation sensor, where the waveform of the motion of the skin is indicative of the jugular vein pressure waveform. The rotation sensor that measures rotation is more insensitive to movements not related to variation of the jugular vein pressure than for example an acceleration sensor.

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 system for measuring a pressure in a vein includes a needle sized and shaped to be inserted through a working channel of an endoscope. The needle is extending longitudinally and including a channel extending longitudinally therethrough. The system also includes a pressure sensing device including a longitudinally extending body sized and shaped to be slidably inserted through the channel of the needle and a sensor mounted on a distal portion of the body and connected to a proximal portion of the pressure sensing device via a connection cable. The sensor is configured to detect information corresponding to a pressure of a flow of blood through a vein.

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.

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.

A system for measuring a pressure in a vein includes a needle sized and shaped to be inserted through a working channel of an endoscope. The needle is extending longitudinally and including a channel extending longitudinally therethrough. The system also includes a pressure sensing device including a longitudinally extending body sized and shaped to be slidably inserted through the channel of the needle and a sensor mounted on a distal portion of the body and connected to a proximal portion of the pressure sensing device via a connection cable. The sensor is configured to detect information corresponding to a pressure of a flow of blood through a vein.

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.

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)).