43 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.

A device for non-invasive venous-pressure sensing comprises an occlusive element (OC) configured to be applied to a proximal portion of a human limb in order to apply an occlusion pressure thereto, and a dilation-sensing element (VS) configured to be applied to a distal portion of a human limb in order to detect an extent of dilation thereof. The device likewise comprises a control circuit (10) coupled to the occlusive element (OC) and to the dilation-sensing element (VS). The control circuit (10) is configured to: —i) control (104, 106) the occlusive element (OC) in order to apply at least one sub-diastolic occlusion pressure and maintain it for a certain occlusion interval; —ii) obtain (108a, 108b) from the dilation-sensing element (VS) a sensing signal; —iii) carry out a check on the sensing signal for a certain variation of the dilation of the distal portion resulting from the fact that the occlusion pressure is removed; and —iv) issue a signal (102) indicating a venous pressure that is lower than the applied occlusion pressure (P0c) as a result of the fact that said check indicates a variation in the dilation of the distal portion of the limb resulting from the fact that the occlusion pressure has been removed.

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.

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 discloses a lower limb raising body position pad, which belongs to the technical field of body position pads and comprises a base, two body position pads and a protective sleeve, the base is horizontally placed, the upper end of the base is provided with an opening, a first groove, a second groove, a third groove and a fourth groove are symmetrically arranged in the base, and the protective sleeve is arranged in the first groove. The two body position pads are symmetrically arranged, the upper portions of the two body position pads are rotationally connected, and a torsion spring is arranged at the rotating connection position. When a patient is in a supine position state, the lower limbs of the patient can be adjusted to the height matched with the lower limbs through the lifting and supporting effects according to the weights, heights and requirements of different patients, lower limb vein blood can be promoted to flow back to the heart, lower limb vein blood deposition can be reduced, and the venous pressure is reduced; and the lower limb lifting body position pad can help the patient to change the body position, so that the compression time of local skin is shortened, and the occurrence of pressure sores is prevented.

The utility model discloses an auxiliary device for precisely measuring central venous pressure, and relates to the technical field of medical instruments. The auxiliary device for precisely measuring the central venous pressure comprises two groups of lifting rails which are formed by bending a steel plate into an S shape; the two ends of the positioning strip are in forward sliding connection with the two sets of lifting rails correspondingly, and the positioning strip is fixed to the specified height of the lifting rails through first positioning bolts; the lifting track is arranged to be connected with the positioning strip, the height of the positioning strip can be adjusted to be kept at the height of the axillary center line, the device can be suitable for patients of different figures to use, the height of a saline column in an infusion tube can be accurately measured in cooperation with scale marks, and then the venous pressure value is read; the lifting frame is matched with the positioning buckle, the upper end of the infusion tube can be clamped and lifted, a water column is observed through residual saline water in the infusion tube, the height is stable, one person can operate, other people do not need to hold the infusion tube by hand all the time to lift the infusion tube, the manpower requirement is lowered, the measurement error is reduced, and operation is convenient.

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.

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.

Dialyzer systems can integrate the technology and functionality of multiple blood treatment systems in a significantly integrated manner. For example, the present disclosure describes dialyzer systems that include magnetically driven and magnetically levitated pump rotors integrated into the dialyzer. Such dialyzers can be used with treatment modules that include pump drive units that generate magnetic fields. In some embodiments, the dialyzer includes a pressure transducer chamber having a flexible membrane that a corresponding pressure transducer of the treatment module can engage to detect arterial and / or venous pressure.

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.

In a method for non-invasively obtaining information on the intracranial pressure of a patient, during a first interval a plurality of facial veins of the patient, leading from a region surrounding the orbital socket are obstructed by applying external pressure on each of the plurality of facial veins. During the first interval, an external pressure is applied on a designated vein (17) connected to an intracranial vessel, at a location in the region, upstream the obstructions of the plurality of facial veins. A change of geometry of the designated vein (17) is observed, caused by the external pressure to obtain at least one first value related to a venous pressure in the designated vein (17). The at least one first value is processed to obtain the information on the intracranial pressure. The method enables the measurement of a pressure value that is closely related to an intracranial pressure without having to perform the measurement in the intracranial volume. Instead, the obstruction creates a direct communication of pressure between an intracranial vessel and the designated vein on the outside of the head that may be easily examined.

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.

Dialyzer systems can consolidate multiple technologies and functionalities of blood treatment systems in a significantly integrated fashion. For example, this disclosure describes dialyzer systems that include a magnetically driven and magnetically levitating pump rotor integrated into the dialyzer. Such a dialyzer can be used with treatment modules that include a magnetic field-generating pump drive unit. In some embodiments, the dialyzers include pressure sensor chambers with flexible membranes with which corresponding pressure transducers of the treatment modules can interface to detect arterial and / or venous pressures.

The utility model discloses a venous pressure detection device, which relates to the technical field of medical instruments and comprises a measuring tube, an extension tube is movably sleeved on the inner side of the measuring tube, the lower end of the measuring tube is fixedly connected with a base, and a push ring is fixedly connected to the outer wall of the extension tube close to the bottom end through a round rod. The inner side of the push ring is movably sleeved with the outer side of the measuring tube, the inner side of the side wall of the push ring is rotationally connected with two limiting mechanisms which are symmetrically distributed left and right, and the position, close to the front side, of the upper side of the base is fixedly connected with a fixing mechanism. According to the venous pressure detection device, the pipeline is placed on the inner side of the measuring pipe and the inner side of the extension pipe, then the lower side of the pipeline is fixed through the pressing block, the push ring is pushed, and finally liquid on the inner side of the pipeline is measured through the scales on the measuring pipe and the extension pipe, so that the purpose of rapid detection is achieved; the pipeline is held by one hand, and a single person can independently and rapidly operate the pipeline.

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 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 utility model relates to the technical field of intravenous infusion devices, in particular to an automatic stopping device for intravenous infusion. The technical problems that in the prior art, an intravenous infusion device cannot automatically stop infusion and needs to continuously pay attention to the infusion progress after liquid medicine infusion is completed, a large amount of manpower is consumed, a patient cannot rest at ease in the infusion process, and if the infusion is completed and treatment is not conducted in time, the patient cannot take a rest at ease are solved. Venous blood may flow back due to the fact that the pressure in the infusion tube is lower than the venous pressure of an infusion part; according to the technical scheme, the automatic stopping device for venous transfusion comprises a liquid medicine bottle, an output assembly, a transfusion assembly, a hanging assembly, a control assembly, an input assembly and an alarm assembly; through the arrangement of the infusion assembly, liquid can be replaced or infusion can be stopped in time after infusion is completed, consumption of a large amount of manpower is reduced, a patient can rest at ease in the infusion process, and blood is effectively prevented from flowing back into an infusion tube.